Mitsubishi KX-SM-202 User Manual

VRF INVERTER MULTI-SYSTEM AIR-CONDITIONERS

(OUTDOOR UNIT)

Manual No. '14

• KX-SM-202

Standard series

Single use (Used also for combination)

FDC280KXZE1, 335KXZE1, 400KXZE1, 450KXZE1, 475KXZE1, 500KXZE1, 560KXZE1

Combination use

FDC615KXZE1, 670KXZE1, 735KXZE1, 800KXZE1, 850KXZE1, 900KXZE1, 950KXZE1, 1000KXZE1,

1060KXZE1, 1120KXZE1, 1200KXZE1, 1250KXZE1, 1300KXZE1, 1350KXZE1,1425KXZE1,
1450KXZE1, 1500KXZE1, 1560KXZE1, 1620KXZE1, 1680KXZE1

KXZ series

(Heat pump type)

Corrosion protection treatment series (Non-CE Marking models)

Single use (Used also for combination)

FDCS280KXZE1, 335KXZE1, 400KXZE1, 450KXZE1, 475KXZE1, 500KXZE1, 560KXZE1

Combination use

FDCS615KXZE1, 670KXZE1, 735KXZE1, 800KXZE1, 850KXZE1, 900KXZE1, 950KXZE1, 1000KXZE1,

1060KXZE1, 1120KXZE1, 1200KXZE1, 1250KXZE1, 1300KXZE1, 1350KXZE1,1425KXZE1,
1450KXZE1, 1500KXZE1, 1560KXZE1, 1620KXZE1, 1680KXZE1

SERVICE MANUAL

(1) Regarding the Indoor unit series, refer to the No.'14

•

KX-DB-206

(2) Regarding the Duct Connected-High static Pressure-type Outdoor Air Processing Unit Series

(FDU500〜1800FKXE6), refer to the DATA BOOK No.'08

•

KX-DB-122

•

Note:

'14 • KX-SM-202

CONTENTS

1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER ..................... 1

1.1 Remote control (Option parts) ................................................................... 1

1.2 Operation control function by the wired remote control ............................. 4

1.3 Operation control function by the indoor control ....................................... 9

1.4 Operation control function by the outdoor control ................................... 22

2. SYSTEM TROUBLESHOOTING PROCEDURE ............................................. 66

2.1 Basics of troubleshooting ........................................................................ 66

2.2 Explanation of troubleshooting ................................................................ 67

2.3 Contents of troubleshooting .................................................................... 68

2.4 Outdoor unit control PCB replacement procedure ................................ 124

2.5 Outdoor unit inverter PCB replacement procedure ............................... 126

2.6 Outdoor unit transistor module replacement procedure ........................ 128

3. ELECTRICAL WIRING .................................................................................. 131

4. PIPING SYSTEM ............................................................................................ 134

5. APPLICATION DATA .................................................................................... 137

5.1 Installation of outdoor unit ..................................................................... 137

5.2 Instructions for installing the branch pipe set ........................................ 162

5.3 Procedure to attach or remove the front panel ...................................... 166

– 1 –

'14 • KX-SM-202

⑤LCD display (With backlight)

④Operation lamp

This lamp lights in green (yellow-green) during

operation. It changes to red if any error occurs.

⑥USB port (mini-B)

USB connector (mini-B) allows connecting to a
personal computer.
For operating methods, refer to the instruction
manual attached to the software for personal
computer (eco-touch remote control RC-EX1,
utility software).

②switch (High Power switch)

Pushing this button starts the high power

operation.

A tap on the LCD lights the backlight.
The backlight turns off automatically if there is no
operation for certain period of time.
Lig hti ng perio d o f the ba ckl ight lig hting ca n b e
changed.
If the backlight is ON setting, when the screen
is tapped while the backlight is turned off, the
backlight only is turned on.(Op erati ons w ith
switches ①,② and ③ are excluded.)

③ switch (Energy Saving switch)

Pushing this button starts the energy-saving

operation.

⑬Fan speed change button

Displays the fan speed which is selected currently.

Tap this button to change the fan speed.

⑨Menu button

When setting or changing other than the following

⑩-⑭, tapthemenubutton.When menu items are
displayed, select one and set.

⑫Flap direction button

Displays the flap direction which is selected currently.

Tap this button to change the flap direction.

⑦Clock, R/C name display

Displays the current time and
the name of R/C

⑪Change set temp button

Displays the temperature which
is set currently.Tap this button
to change the set temperature.

⑩Change operation mode button

Displays the operation mode which
is selected currently. Tap this button
to change the operation mode.

⑭Timer button

Displays simplified contents of the
timer which is set currently.
(When two or more timers are set,
contents of the timer which will be
operated immediately after is
displayed.)
Tap this button to set the timer.

①switch (Run/Stop switch)

One push on the button starts operation
and another push stops operation.

⑧Icon display

Each icon is displayed when one of following settings
is going on.(It is referring to the following figure for
details.)

⑮Message display

Status of air conditioner operation and messages of

the R/C operations etc.are displayed.

When the demand control
is effective.

When setting is made
from the sub R/C.

When the central control
(Optional) is running.

When the periodical
inspection is necessary.

During the ventilation
operation

When ”filter sign” is up.

When the Permission/
Prohibition setting is made.

When the peak-cut timer is setWhen the weekly timer

is set.

⑧Icon display
Each icon is displayed when one of following settings is going on.

Touch panel system, which is operated by tapping the LCD screen with a finger, is employed for any operations
other than the ① Run/Stop, ② High power and ③ Energy-saving switches.

All icons are shown for the sake of explanation.

Model RC-EX1A

1.

OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

1.1 Remote control (option parts)

(1) Wired remote control

– 2 –

'14 • KX-SM-202

(1) Wired remote control
Model RC-E5

The figure below shows the remote control with the cover opened. Note that all the items that may be displayed in
the liquid crystal display area are shown in the figure for the sake of explanation.
Characters displayed with dots in the liquid crystal display area are abbreviated.

＊ All displays are described in the liquid crystal display for explanation.

The figure below shows the remote control with the cover opened.

Ventilaion display

Displayed during ventilation operation

Central control display

Displayed when the air conditioning system is
controlled by centralized remote control.

Timer operation display

Displays the timer operation setting.

Temperature setting buttons

These buttons are used to set the
temperature of the room.

Timer button

This button is used to set
the timer mode.

Timer setting buttons

These buttons are used to set
the timer mode and the time.

ESP button

This button is used to
select the auto static
pressure adjustment mode.

Cover

AIR CON No. button

Display the indoor unit number connected to this
remote control.

CHECK button

This button is used at servicing.

TEST button

This button is used during test operation.

Weekly timer display

Displays the settings of the
weekly timer.

Operation setting display area

Displays setting temperature, airflow
volume, operation mode and oparation
message.

Operation/check indicator light

During oparation: Lit in green
In case of error: Flashing in red

Operation/stop button

This button is used to operate and stop
the air conditioning system.
Press the button once to operate the
system and press it once again to stop
the system.

MODE button

This button is used to change the
operation mode.

FAN SPEED button

This button is used to set the airflow
volume.

VENT button

This button is used to operate external
ventilator.

LOUVER button

This button is used to operate/stop the
swing louver.

SET button

●

This button is used to fix the setting.

●

This button is used to set the silent mode.

RESET button

●

Press this button while making settings to go back to the

previous operation.

●

This button is also used to reset the "FILTER CLEANING" display.

(Press it after cleaning the air filter)

– 3 –

'14 • KX-SM-202

(2) Wireless remote control

* All displays are described in the liquid crystal display for explanation

Indication section

Operation section

Indicates set temperature.

Indicates the status of swing louver.

Indicates selected operation with .

Indicates for two seconds when FILTER
button is pressed.

Indicates when OFF-TIMER is set.

Indicates OFF-TIMER setting time. Indicates the
current time when the OFF-TIMER is not set.

When this is pressed once, the unit starts to
operate and when this is pressed once again,
it stops operating.

Used to swing the louver.

Every time this button is pressed, displays switch
as below.

Sets room temperature by pressing or button.
Sets time when setting the time.

Used to cancel the TIMER SETTINGS.

Used to reset the microcomputer.

Indicates the selected airflow volume

Indicates when ON-TIMER is set.

Indicates the ON-TIMER setting time.
Nothing displayed when ON-TIMER is
not set.

Sends signal to the air conditioner.

Every time this button is pressed, the mode is
switched as below.

Used to reset (turn off) the filter sign.
Press the button only after completing
the filter cleaning.

Sets ON TIMER operation.

Sets OFF TIMER operation.

Sets current time.

– 4 –

'14 • KX-SM-202

1.2 Operation control function by the wired remote control

Cooling Fan

Dry Heating

(1) Switching sequence of the operation mode switches of remote control

(a) Tap the change operation mode button on the TOP screen.

(b) When the change operation mode screen is displayed, tap the button of desired mode.
(c) When the operation mode is selected, the display returns to the TOP screen.

Icons displayed have the following meanings.

Notes(1) Operation modes which cannot be selected depending on combinations of IU and
OU are not displayed.

Notes(2) Whe n the Au to is selected, the cool ing a nd heati ng swi tching o perat ion is

performed automatically according to indoor and outdoor temperatures.

(2) CPU reset

Reset CPU from the remote control as follows.

(3) Power failure compensation function (Electric power supply failure)

Enable the Auto-restart function from the remote control as follows.

①Tap the Menu button

on the TOP screen.

②,③ Main menu screen is displayed.

Tap the “Service & Maintenance” on the menu screen.

④Display the service
password input screen.

Enter the service password
(4-digit number).

①TOP screen ②Menu screen 1 ③ Menu screen 3 ④ Service password input

①Tap the Menu button

on the TOP screen.

②,③ Main menu screen is displayed.

Tap the “Service & Maintenance” on the menu screen.

④Display the service
password input screen.

Enter the service password
(4-digit number).

①TOP screen ②Menu screen 1 ③ Menu screen 3 ④ Service password input

⑤

Service & maintenance menu 1

⑥

Service & maintenance menu 2

⑤,⑥ Service & maintenance menus are displayed.

⑦ Special settings

⑦Special settings

CPU reset : Micr ocompu ters of IU

and OU connected are reset

(State of restoration after

power failure).

⑧CPU reset

All microcomputers on the R/C operated,
other R/Cs, IUs and OUs are reset (State
of restoration after power failure).
Tap [Yes] to reset CPU

⑤,⑥,⑦Display the R/C setting menu screens.

⑤R/C setting menu 1 ⑥R/C setting menu 2 ⑦R/C setting menu 3

⑱ Auto-restart

Enable : It returns to the state be fore the supply

power fai lure as soon as the p ower is

restored (After the end of the primary
control at the power on).
Disable : It stops after the restoration of power

supply, regardless the state of operation

before the power failure.

⑱Auto-restart

Set the state of operation to be started when the
power supply is restored after a power failure.

⑧ CPU reset

CPUreset

Restartafterreset

IfOK,



tap［Set.

］

Model RC-EX1A

– 5 –

'14 • KX-SM-202

• Since it memorizes always the condition of remote control, it starts operation according to the contents of memory no
sooner than normal state is recovered after the power failure. Although the auto swing stop position and the timer mode are
cancelled, the weekly timer setting is restored with the holiday setting for all weekdays.

After recovering from the power failure, it readjusts the clock and resets the holiday setting for each weekday so that the

setting of weekly timer becomes effective.

• Content memorized with the power failure compensation are as follows.

Note (1) Items (f), (g) and (h) are memorized regardless whether the power failure compensation is effective or not while the setting of silent mode is cancelled

regardless whether the power failure compensation is effective or not.

(a)

At power failure – Operating/stopped

If it had been operating under the off timer mode, sleep timer mode, the state of stop is memorized. (Although the

timer mode is cancelled at the recovery from power failure, the setting of weekly timer is changed to the holiday
setting for all weekdays.)

(b)

Operation mode

(c)

 Airowvolumemode

(d)

Room temperature setting

(e)

Louver auto swing/stop

However, the stop position (4-position) is cancelled so that it returns to Position (1).

(f)

“Remote control function items” which have been set with the remote control function setting (“Indoor function

items” are saved in the memory of indoor unit.)

(g)

Upper limit value and lower limit value which have been set with the temperature setting control

(h)

Sleep timer and weekly timer settings (Other timer settings are not memorized.)

– 6 –

'14 • KX-SM-202

⑥ Operation and setting from remote control

A: Refer to the in struction manual for RC-EX series.
B: Refer to the in stallation manual for RC-EX series.
C: Loading a utili ty software vie Internet

○: Nearly same fun ction setting and operations are possible.
△: Similar functio n setting and operations are possible.

Description

RC-EX
series

RC-E4
RC-E5

1. Remote Control network

1

1
2
3
4
5
6
7
8

9

Control plural indoor units
by a single remote control

A remote controller can control plural indoor units up to 16 (in one group of remote control network). An address is set to each indoor unit.

○ ○

2

A maximum of two remote controllers (include option wireless) can be connected to one indoor unit. Set one to "Master" and the other to "Slave".

Ｂ ○

2. TOP screen, Switch manipulati on Ａ
Menu "Control", "Settings", or "Details" can be selected. (3.-19.) Ａ
Operation mode "Cooling", "Heating", "Fan" or "Dry" can be set. Ａ
Set temp. "Set temperature" can be set by 0.5℃ interval. Ａ

○Ａ "Air flow direction". [Individual flap control setting] can be set. Air flow direction
Fan speed "Fan speed" can be set. Ａ
Timer setting "Timer operation" can be set. Ａ
ON/OFF "On/Off operation of the system" can be done. Ａ

○

○

○

○

○

High power SW "High power operation" or "Normal operation" can be selected. Ａ
Energy-saving SW "Energy-saving operation" or "Normal operation" can be selected. Ａ

3．Energy-sa ving setting ［メニュー］  1番目 Ａ

1

△

2 Peak-cut timer

[Administrator password]

3 Automatic temp. set back

[Administrator password]

△

4． Individual flap contro l setting ［メニュー］  3番目 Ａ

The moving range (the positions of upper limit and lower limit) of the flap for individual air outlet port can be set. Ａ

5. Ventilation ［メニュー］  4番目

1

External ventilation
(In combination with
ventilator)

On/Off operation of the external ventilator can be done.

・The settings of [Interlock] with AC (air-conditioner), [Single operation] of ventilator or operation [invalid] of ventilation can be done through

[Ventilation settings] in the [Remote controller] menu.

○

○Ａ

Ａ

Ａ

Ａ

Master/slave setting of remote
controllers

Setting & display item

Individual flap control setting

Auto OFF timer
[Administrator password]

For preventing the timer from keeping ON, set hours to stop operation automatically with this timer.

・The selectable range of setting time is from 30 to 240 minutes (10minutes interval)
・When setting is "Valid", this timer will activate whenever the ON timer is set.

Power consumption can be reduced by restricting the maximum capacity.
Set the [Start time], the [End time] and the capacity limit % (Peak-cut %).

・4-operation patterns per day can be set at maximum.
・The setting time can be changed by 5-minutes inter val.
・The selectable range of capacity limit % (Peak-cut %) is from 0% to 40-80% (20% interval).
・Holiday setting is available.

After the elapse of the set time period, the current set temp. will be set back to the [Set back temp.]

・The setting can be done in cooling and heating mode respectively.
・The selectable range of the set time is from 20 min. to 120 min. (10 min. interval). 
・Set the [Set back temp.] by 1℃ interval.

6．Filter sign r eset ［メニュー］  7番目 Ａ

○

1 Filter sign reset Ｂ
2 Setting next cleaning date Ａ

7．Initial set tings

［メニュー］  8番目

1 Clock setting △
2 Date and time display Ａ

Ａ

3 Summer time Ａ
4 Contrast Ａ
5 Backlight Ａ
6 Controller sound Ａ

8．Timer setting s

［メニュー］  9番目 Ａ

1

Set On timer by hour

・The period of set time can be set within the range of 1hour-12hours (1hr interval).
・The operation mode, set temp and fan speed at starting operation can be set.

2 Set Oｆｆ timer by hour

・The period of set time can be set within the range of 1hour-12hours (1hr interval).

3 Set On timer by clock

・The set clock time can be set by 5 minutes interval.
・[Once (one time only)] or [Everyday] operation can be switched.
・The operation mode, set temp and fan speed at starting operation can be set.

4 Set Off timer by clock

・The set clock time can be set by 5 minutes interval.
・[Once (one time only)] or [Everyday] operation can be switched.

5 Confirmation of timer settings Ａ

［メニュー］  10番目

1 Weekly timer 

[Administrator password]

△

・8-operation patterns per day can be set at a maximum.
・The setting clock time can be set by 5 minutes inter val.
・Holiday setting is available.
・The operation mode, set temp and fan speed at starting operation can be set.

△
△

［メニュー］?［次ページ］  1番目

1

When leaving home for a long period like a vacation leave, the unit can be operated to maintain the room temperature not to be hotter in summer or not to be colder in winter.

・The judgment to switch the operation mode (Cooling⇔Heating) is done by the both factors of the set temp. and outdoor air temp.
・The set temp. and fan speed can be set.

△

△

△

△

Ａ

Ａ

Ａ

Ａ

Ａ

Ａ

Home leave mode 
[Administrator password]

9．Weekly timer

10．Home leave mode

The filter sign can be reset.
The next cleaning date can be set.

When select [Valid], the +1hour adjustment of current time can be set.When select [Invalid], the [Summer time] adjustment can be reset.

The current date and time can be set or revised.
[Display] or [Hide] the date and/or time can be set, and the [12H] or [24H] display can be set.

The contrast of LCD can be adjusted higher or lower.
Switching on/off a light can be set and the period of the lighting time can be set within the range of 5sec-90sec (5sec interval).
It can set with or without [Controller sound (beep sound)] at touching panel.

The period of time to start operation after stopping can be set.

The period of time to stop operation after starting can be set.

The clock time to start operation can be set.

The clock time to stop operation can be set.

Status of timer settings can be seen.

On timer and Off timer on weekly basis can be set.

⑥ Operation and setting from remote control (continued)

Description

[Administrator password]

1

Enable/Disable setting ・Enable/Disable setting of operation can be set. [On/Off] [Change set temp.] [Change operation mode] [Change air flow direction]

[Individual flap control setting][Fan speed] [High power operation] [Energy-saving operation] [Timer settings] [Weekly timer setting]

・Request for administrator password can be set. [Individual flap control setting][Weekly timer][Energy-saving setting][Home leave mode][Administrator settings]

2

Silent mode timer The period of time to operate the outdoor unit by prioritizing the quietness can be set.

・The [Start time] and the [End time] for operating outdoor unit in silent mode can be set. ・The period of the operation time can be set once a day by 5 minutes interval.

3 Setting temp. range The upper/lower limit of indoor temp. setting range can be set.

・The limitation of indoor temp. setting range can be set for each operation mode in cooling and heating.

4 Temp. increment setting The temp increment setting can be changed by 0.5℃ or 1.0℃. Ａ
5

RC display setting

Register [Room name] [Name of I/U]
Display [indoor temp.] or not.
Display [inspection code] or not.
Display [Heating stand-by] [Defrost operation] [Auto cooling/heating] or not

6

1

2

3

4
5
6

1
2

3
4
5

6
7

8

9
10
11

Change administrator password The administrator password can be changed. (Default setting is "0000")

The administrator password can be reset.

[Service password]

Installation date The [Installation date] can be registered.

・

When registering the [Installation date], the [Next service date] is displayed automatically. (For changing the [Next service date]. please refer the item of [Service & Maintenance].)

Service contact The [Service contact] can be registered and can be displayed on the RC.

・The [Contact company] can be registered within 10 characters. ・The [Contact phone] can be registered within 13 digits.

Test run

Cooling test run

On/Off operation of the test run can be done.
The [Cooling test run] can be done at 5℃ of set temp. for 30 minutes. ○

Drain pump test run Only the drain pump can be operated. ○
Compressor Hz fixed oper ation

The [Test run] operation can be done with fixed compressor Hz set by installer. ○

Static pressure adjust ment In case of combination with only the ducted indoor unit which has a function of static pressure adjustment, the static pressure is adjustable.
Change auto-address The set address of each indoor unit decided by auto-address setting method can be changed to any other address. (For multiple KX units only) Ｂ
Address setting of Main IU

[Service password]

Main/Sub RC setting The setting of [Main/Sub RC] can be changed. Ｂ
RC sensor

The [Valid/Invalid] setting of [RC sensor] can be done. Respective setting in cooling and heating is available.

RC sensor adjustment The offset value of [RC sensor] sensing temp. can be set respectively in heating and cooling.

・The setting range of offset value is ±3℃ both in cooling and heating.
Operation mode The [Valid/Invalid] setting of [Auto][Cooling][Heating] and [Dry] can be done respectively. Ｂ
Fan speed The setting of [Fan speed] can be done from following patterns.・1-speed, 2-speeds (Hi-Me), 2-speeds (Hi-Lo), 3-speeds, 4-speeds. Ｂ
External input The applicable range ([Individual] or [All units]) of CnT input to the multiple indoor units connected in one control system.

・[Individual] : Only the unit received CnT input signal.・[All units] : All the units connected to one control system received CnT input signal.
Ventilation setting The setting of [Invalid] operation of ventilator, [Interlock] with AC or [Independent] of ventilator can be selected.

・When setting [Interlock], the operation of external ventilator is interlocked with the operation of AC ・When setting [Independent], only the operation of external ventilator is available.
Flap control The [Flap control] method can be switched to[Stop at fixed position] or [Stop at any position]・[Stop at fixed position] : Stop the flap at a certain position

among the designated 4 positions.・[Stop at any position] : Stop the flap at any arbitrary position just after the stopping command from RC was sent.
Auto-restart The operation control method after recovery of power blackout happened during operation can be set. Ｂ
Auto temp. setting [Valid] or [Invalid] of [Auto temp. setting] can be selected. Ｂ
Auto fan speed setting [Valid] or [Invalid] of [Auto fan speed setting] can be selected. Ｂ

Main indoor unit address can be set.

・Only the Main indoor unit can change operation mode and the Sub indoor units dominated by the Main indoor unit shall follo w.
・The Main indoor unit can domain 10 indoor units a t a maximum.

12．Installer settings

13．RC function settings

Setting & display item

11． Administrato r settings

[Service password]

High ceiling The fan tap of indoor fan can be changed. ・[Standard] [High ceiling 1] [High ceiling 2] can be selected. Ｂ
Filter sign The setting of filter sign display timer can be done from following patterns. Ｂ
External input 1

The content of control by external input can be changed.・The selectable contents of control are [On/Off] [Permission/Prohibition] [Cooling/heating] [Emergency stop]
External input 1 signal The type of external input signal ([Level input]/[Pulse input]) can be changed. Ｂ
External input 2 ・The selectable contents of control are [On/Off] [Permission/Prohibition] [Cooling/heating] [Emergency stop] Ｂ
External input 2 signal The type of external input signal ([Level input]/[Pulse input]) can be changed. Ｂ
Heating thermo-off tem p. adjust.

The judgment temp. of heating thermo-off can be adjusted within the range from 0 to +3℃（1℃ interval) Ｂ
Return air sensor adjus t. The sensing temp. of return air temp. sensor built in the indoor unit can be adjusted within the range of ±2℃. Ｂ
Fan control i n heating t hermo OFF

The fan control method at heating thermo-off can be changed.・The selectable fan control methods are [Low] [Set fan speed] [Intermittent] [Stop]. Ｂ
Anti-frost temp. The judgment temp. of anti-frost control for the indoor unit in cooling can be changed to [Temp. High] or [Temp. Low]. Ｂ
Anti-frost control When the anti-frost control of indoor unit in cooling is activated, the fan speed can be changed.
Drain pump operation In any operation mode in addition to cooling and dry mode, the setting of drain pump operation can be done. Ｂ
Residual fan operation in cooling

The time period of residual fan operation after stopping in cooling mode can be set. Ｂ
Residual fan operation in heating

The time period of residual fan operation after stopping or thermo-off in heating mode can be set. Ｂ
Intermittent fan opera tion in hea ting

The fan operation rule following the residual fan operation after stopping or thermo-off in heating mode can be set. Ｂ
Fan circulat or operatio n In case that the fan is operated as the circulator, the fan control rule can be set. Ｂ
Control pressure adjust . (For OA processing uni t only)

When only the OA processing units are operated, control pressure value can be changed. Ｂ
Auto operation mode The [Auto rule selection] for switching the operation mode automatically can be selected from 3 patterns. Ｂ
Thermo. rule setting When selecting [Outdoor air temp. control], the judgment temp can be offset by outdoor temp.. Ｂ
Auto fan speed control

Under the [Auto fan speed control] mode, the switching range of fan speed can be selected from following 2 patterns [Auto 1] [Auto 2]. ・[Auto 1] : Hi ⇔Me⇔Lo・[Auto 2] : P-hi⇔Hi⇔Me ⇔Lo

[Service password]

1

2
3
4

5
6

IU address No. Max. 16 indoor units can be connected to one remote control, and all address No. of the connected indoor units can be displayed.

・The indoor unit conforming to the address No. can be identified by selecting the address No. and tapping [Check] to operate the indoor fan.
Next service date The [Next service date] can be registered.・The [Next service date] and [Service contact] is displayed on the [Periodical check] message screen. ＡＢ
Operation data Total 39 items of [Operation data] for indoor unit and outdoor unit can be displayed. Ｂ
Error history [Date and time of error occurred] [I/U address] [Error code] for Max. 16 latest cases of error history can be displayed. Ｂ
Display anomaly data The operation data just before the latest error stop can be displayed. Ｂ
Reset periodical check The timer for the periodical check can be reset. Ｂ
Saving I/U settings The I/U settings memorized in the indoor PCB connected to the remote control can be saved in the memory of the remote control.
Special settings [Erase I/U address] [CPU reset] [Initializing] [Touch panel calibration] Ｂ

14． I/U settings

15．Service & Maintenance

1
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5
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7
8

9

10
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19
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(4) Operation and setting from remote control

– 7 –

'14 • KX-SM-202

⑥ Operation and setting from remote control (continued)

Description

[Administrator password]

Ａ

1

Enable/Disable setting ・Enable/Disable setting of operation can be set. [On/Off] [Change set temp.] [Change operation mode] [Change air flow direction]

[Individual flap control setting][Fan speed] [High power operation] [Energy-saving operation] [Timer settings] [Weekly timer setting]

・Request for administrator password can be set. [Individual flap control setting][Weekly timer][Energy-saving setting][Home leave mode][Administrator settings]

2

Silent mode timer The period of time to operate the outdoor unit by prioritizing the quietness can be set.

・The [Start time] and the [End time] for operating outdoor unit in silent mode can be set. ・The period of the operation time can be set once a day by 5 minutes interval.

3 Setting temp. range The upper/lower limit of indoor temp. setting range can be set.

・The limitation of indoor temp. setting range can be set for each operation mode in cooling and heating.

4 Temp. increment setting The temp increment setting can be changed by 0.5℃ or 1.0℃. Ａ
5

RC display setting

Register [Room name] [Name of I/U]
Display [indoor temp.] or not.
Display [inspection code] or not.
Display [Heating stand-by] [Defrost operation] [Auto cooling/heating] or not

○
△

△

△

△

○

6

1

2

3

4
5
6

1
2

3
4
5

6
7

8

9
10
11

Change administrator password The administrator password can be changed. (Default setting is "0000")

The administrator password can be reset.

Ａ
Ｂ

[Service password]

Ｂ

Installation date The [Installation date] can be registered.

・

When registering the [Installation date], the [Next service date] is displayed automatically. (For changing the [Next service date]. please refer the item of [Service & Maintenance].)

Ｂ

Service contact The [Service contact] can be registered and can be displayed on the RC.

・The [Contact company] can be registered within 10 characters. ・The [Contact phone] can be registered within 13 digits.

Test run

Cooling test run

On/Off operation of the test run can be done.
The [Cooling test run] can be done at 5℃ of set temp. for 30 minutes. ○

Drain pump test run Only the drain pump can be operated. ○
Compressor Hz fixed oper ation

The [Test run] operation can be done with fixed compressor Hz set by installer. ○

Static pressure adjust ment In case of combination with only the ducted indoor unit which has a function of static pressure adjustment, the static pressure is adjustable.
Change auto-address The set address of each indoor unit decided by auto-address setting method can be changed to any other address. (For multiple KX units only) Ｂ○△
Address setting of Main IU

[Service password]

Ｂ

Main/Sub RC setting The setting of [Main/Sub RC] can be changed. Ｂ
RC sensor

The [Valid/Invalid] setting of [RC sensor] can be done. Respective setting in cooling and heating is available.

Ｂ

RC sensor adjustment The offset value of [RC sensor] sensing temp. can be set respectively in heating and cooling.

・The setting range of offset value is ±3℃ both in cooling and heating.

Ｂ

Operation mode The [Valid/Invalid] setting of [Auto][Cooling][Heating] and [Dry] can be done respectively. Ｂ
Fan speed The setting of [Fan speed] can be done from following patterns.・1-speed, 2-speeds (Hi-Me), 2-speeds (Hi-Lo), 3-speeds, 4-speeds. Ｂ
External input The applicable range ([Individual] or [All units]) of CnT input to the multiple indoor units connected in one control system.

・[Individual] : Only the unit received CnT input signal.・[All units] : All the units connected to one control system received CnT input signal.

Ｂ

Ventilation setting The setting of [Invalid] operation of ventilator, [Interlock] with AC or [Independent] of ventilator can be selected.

・When setting [Interlock], the operation of external ventilator is interlocked with the operation of AC ・When setting [Independent], only the operation of external ventilator is available.

Ｂ

Flap control The [Flap control] method can be switched to[Stop at fixed position] or [Stop at any position]・[Stop at fixed position] : Stop the flap at a certain position

among the designated 4 positions.・[Stop at any position] : Stop the flap at any arbitrary position just after the stopping command from RC was sent.

Ｂ

Auto-restart The operation control method after recovery of power blackout happened during operation can be set. Ｂ

○
○

△

○
○

○

○

○

○

Auto temp. setting [Valid] or [Invalid] of [Auto temp. setting] can be selected. Ｂ
Auto fan speed setting [Valid] or [Invalid] of [Auto fan speed setting] can be selected. Ｂ

△Ｂ

Ｂ

Ｂ

Ｂ

Ａ

Ａ

Ａ

Ａ

Main indoor unit address can be set.

・Only the Main indoor unit can change operation mode and the Sub indoor units dominated by the Main indoor unit shall follo w.
・The Main indoor unit can domain 10 indoor units a t a maximum.

12．Installer settings

13．RC function settings

Setting & display item

11． Administrator settings

RC-EX
series

RC-E4
RC-E5

[Service password]

Ｂ

High ceiling The fan tap of indoor fan can be changed. ・[Standard] [High ceiling 1] [High ceiling 2] can be selected. Ｂ
Filter sign The setting of filter sign display timer can be done from following patterns. Ｂ
External input 1

The content of control by external input can be changed.・The selectable contents of control are [On/Off] [Permission/Prohibition] [Cooling/heating] [Emergency stop]

Ｂ

External input 1 signal The type of external input signal ([Level input]/[Pulse input]) can be changed. Ｂ
External input 2 ・The selectable contents of control are [On/Off] [Permission/Prohibition] [Cooling/heating] [Emergency stop] Ｂ
External input 2 signal The type of external input signal ([Level input]/[Pulse input]) can be changed. Ｂ
Heating thermo-off tem p. adjust.

The judgment temp. of heating thermo-off can be adjusted within the range from 0 to +3℃（1℃ interval) Ｂ

Return air sensor adjus t. The sensing temp. of return air temp. sensor built in the indoor unit can be adjusted within the range of ±2℃. Ｂ
Fan control i n heating t hermo OFF

The fan control method at heating thermo-off can be changed.・The selectable fan control methods are [Low] [Set fan speed] [Intermittent] [Stop]. Ｂ

Anti-frost temp. The judgment temp. of anti-frost control for the indoor unit in cooling can be changed to [Temp. High] or [Temp. Low]. Ｂ
Anti-frost control When the anti-frost control of indoor unit in cooling is activated, the fan speed can be changed.

Ｂ

Drain pump operation In any operation mode in addition to cooling and dry mode, the setting of drain pump operation can be done. Ｂ
Residual fan operation in cooling

The time period of residual fan operation after stopping in cooling mode can be set. Ｂ

Residual fan operation in heating

The time period of residual fan operation after stopping or thermo-off in heating mode can be set. Ｂ

Intermittent fan opera tion in hea ting

The fan operation rule following the residual fan operation after stopping or thermo-off in heating mode can be set. Ｂ

Fan circulat or operatio n In case that the fan is operated as the circulator, the fan control rule can be set. Ｂ
Control pressure adjust . (For OA processing uni t only)

When only the OA processing units are operated, control pressure value can be changed. Ｂ

○
○
○
○

△
△
○
○
○
○
○
○
○

○

Auto operation mode The [Auto rule selection] for switching the operation mode automatically can be selected from 3 patterns. Ｂ
Thermo. rule setting When selecting [Outdoor air temp. control], the judgment temp can be offset by outdoor temp.. Ｂ
Auto fan speed control

Under the [Auto fan speed control] mode, the switching range of fan speed can be selected from following 2 patterns [Auto 1] [Auto 2]. ・[Auto 1] : Hi ⇔Me⇔Lo・[Auto 2] : P-hi⇔Hi⇔Me⇔Lo

Ｂ

[Service password]

Ｂ

1

2

3

4

5

6

IU address No. Max. 16 indoor units can be connected to one remote control, and all address No. of the connected indoor units can be displayed.

・The indoor unit conforming to the address No. can be identified by selecting the address No. and tapping [Check] to operate the indoor fan.

Ｂ

Next service date The [Next service date] can be registered.・The [Next service date] and [Service contact] is displayed on the [Periodical check] message screen. ＡＢ
Operation data Total 39 items of [Operation data] for indoor unit and outdoor unit can be displayed. Ｂ
Error history [Date and time of error occurred] [I/U address] [Error code] for Max. 16 latest cases of error history can be displayed. Ｂ
Display anomaly data The operation data just before the latest error stop can be displayed. Ｂ
Reset periodical check The timer for the periodical check can be reset. Ｂ
Saving I/U settings The I/U settings memorized in the indoor PCB connected to the remote control can be saved in the memory of the remote control.

Ｂ

Special settings [Erase I/U address] [CPU reset] [Initializing] [Touch panel calibration] Ｂ

○

○
△

○

△
△

Confirmation of Inspect ion The address No, of anomalous indoor/outdoor unit and error code are displayed.

USB connection Weekly timer setting and etc., can be set from PC.

Ｃ

Ａ

17．PC connection

14． I/U settings

15．Service & Maintenance

16．Inspection

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– 8 –

'14 • KX-SM-202

Model RC-E5

(1) Switching sequence of the operation mode switches of remote control

DRY COOL FAN HEAT

(2) CPU reset

This functions when “CHECK” and “ESP” buttons on the remote control are pressed simultaneously. Operation is same as that
of the power supply reset.

(3) Power failure compensation function (Electric power supply failure)

• This becomes effective if “Power failure compensation effective” is selected with the setting of remote control function.

• Since it memorizes always the condition of remote control, it starts operation according to the contents of memory no
sooner than normal state is recovered after the power failure. Although the auto swing stop position and the timer mode are
cancelled, the weekly timer setting is restored with the holiday setting for all weekdays.

After recovering from the power failure, it readjusts the clock and resets the holiday setting for each weekday so that the

setting of weekly timer becomes effective.

• Content memorized with the power failure compensation are as follows.

Note (1) Items (f), (g) and (h) are memorized regardless whether the power failure compensation is effective or not while the setting of silent mode is cancelled

regardless whether the power failure compensation is effective or not.

(a)

At power failure – Operating/stopped

If it had been operating under the off timer mode, sleep timer mode, the state of stop is memorized. (Although the

timer mode is cancelled at the recovery from power failure, the setting of weekly timer is changed to the holiday
setting for all weekdays.)

(b)

Operation mode

(c)

 Airowvolumemode

(d)

Room temperature setting

(e)

Louver auto swing/stop

However, the stop position (4-position) is cancelled so that it returns to Position (1).

(f)

“Remote control function items” which have been set with the remote control function setting (“Indoor function

items” are saved in the memory of indoor unit.)

(g)

Upper limit value and lower limit value which have been set with the temperature setting control.

(h)

Sleep timer and weekly timer settings (Other timer settings are not memorized.)

[Parts layout on remote control PCB]

X

Y

SW2

SW1

A

B

M

S

親

子

SW1

SW2

Master/ slave setting when more than one remote controls are used

A maximum of two remote controls can be connected to one indoor unit (or one group of indoor units.)

Remote control cord (no polarity)

Remote control

SW1 "Master"

Switch Setting Contents

M Master remote control

SW1

S Slave remote control

Remote control

SW1 "Slave"

Indoor units

Note (1) Don’t change SW2 because it is not used normally.

Caution

When using multiple remote controls, the following dispiays or settings
cannot be done with the slave remote control. It is available only with
the master remote control.

Louver position setting (set upper or lower limit of swinging range)
　Setting indoor unit functions
　Setting temperature range
　Operation data display
　Error data display
　Silent mode setting
　Test operation of drain pump
　Remote control sensor setting

– 9 –

'14 • KX-SM-202

1.3 Operation control function by the indoor control

(1) Operations of functional items during cooling/heating

Cooling Heating

Dehumidifying

Fan

Operation

Functional item

Thermostat

ON

Thermostat

ON

Thermostat

OFF

Thermostat

OFF

Hot start
(Defrost)

Compressor

4-way valve

Outdoor unit fan

Indoor unit fan

Drain pump

(3)





















(2)











(2)







/







/



()

()

/

/



/

/

Thermostat ON:



Thermostat OFF: 

(2)

/

(2)

Note (1) : Operation : Stop /: Turned ON/OFF by the control other than the room temperature control.
(2) ON during the drain motor delay control.
(3) Drain pump ON setting may be selected with the indoor unit function setting of the wired remote control.

(2) Dehumidifying operation

Return air temperature thermistor [Th

I-A (by the remote control when the remote control thermistor is enabled)] controls

the indoor temperature environment simultaneously.

(a) Operation is started in the cooling mode. When the difference between the return air temperature and the setting

temperature is 2°C or less, the indoor unit fan tap is brought down by one tap. That tap is retained for 3 minutes

after changing the indoor unit fan tap.

(b) If the return air temperature exceeds the setting temperature by 3°C during dehumidifying operation, the indoor unit

fan tap is raised. That tap is retained for 3 minutes after changing the indoor unit fan tap.

(c) If the thermostat OFF is established during the above control, the indoor unit fan tap at the thermostat ON is retained

so far as the thermostat is turned OFF.

(3) Timer operation

(a) RC-EX1A

(i) Sleep timer

Set the time from the start to stop of operation. The time can be selected in the range from 30 to 240 minutes (in the
unit of 10-minute).

Note (1) Enable the “Sleep timer” setting from the remote control. If the setting is enabled, the timer operates at every time.

(ii) Set OFF timer by hour

Set the time to stop the unit after operation, in the range from 1 to 12 hours (in the unit of hour).

(iii) Set ON timer by hour

Set the time to start the unit after the stop of operation, in the range from 1 to 12 hours (in the unit of hour). It is
allowed also to set simultaneously the indoor temperature, operation mode, air flow rate and warm-up enabled/
disabled.

(iv) Set ON timer by clock

Set the time to start operation. The time can be set in the unit of 5-minute. This setting can be activated only once

oratevery time. It is allowed alsotosetsimultaneouslytheindoor temperature, operation mode, air owrateand

warm-up enabled/disabled.

Note (1) It is necessary to set the clock to use this timer.

(v) Set OFF timer by clock

Set the time to stop operation. The time can be set in the unit of 5-minute. This setting can be activated only once or
at every time.

Note (1) It is necessary to set the clock to use this timer.

(vi) Weekly timer

Set the ON or OFF timer for a week. Up to 8 patterns can be set for a day. The day-off setting is provided for
holidays and non-business days.

Note (1) It is necessary to set the clock to use the weekly timer.

– 10 –

'14 • KX-SM-202

(vii)

Combination of patterns which can be set for the timer operations





























































Note (1) : Allowed : Not

Sleep time

Sleep time

Set OFF timer by hour

Weekly timer

Set ON timer by hour

Set OFF timer by clock

Set ON timer by clock

Set OFF timer by hour

Set ON timer by hour

Set OFF timer by clock

Set ON timer by clock

Weekly timer

(b) RC-E5

(i) Sleep timer

Set the duration of time from the present to the time to turn off the air-conditioner.
It can be selected from 10 steps in the range from “OFF 1 hour later” to “OFF 10 hours later”. After the sleep timer
setting, the remaining time is displayed with progress of time in the unit of hour.

(ii) OFF timer

Time to turn OFF the air-conditioner can be set in the unit of 10 minutes.

(iii) ON timer

Time to turn ON the air-conditioner can be set. Indoor temperature can be set simultaneously.

(iv) Weekly timer

Timer operation (ON timer, OFF timer) can be set up to 4 times a day for each weekday.

(v) Timer operations which can be set in combination

Timer

OFF timer

ON timer

Weekly timer

Timer







OFF timer







ON timer







Weekly timer







Note (1) : Allowed : Not

Item

Item

(2) Since the ON timer, sleep timer and OFF timer are set in parallel, when the times to turn ON and OFF the airconditioner are duplicated, the setting

of the OFF timer has priority.

(4) Remote control display during the operation stop

When the operation is stopped (the power supply is turned ON), it displays preferentially the “Room temperature”, “Center/

Remote”, “Filter sign”, “Inspection” and “Timer operation”.

(5) Hot start (Cold draft prevention at heating)

(a) Operating conditions

When either one of following conditions either of (i) to (iv), the hot start control is performed.

(i) From stop to heating operation

(ii) From cooling to heating operation

(iii) From heating thermostat OFF to ON

(iv) After completing the defrost control (only on units with thermostat ON)

(b) Contents of operation

(i) Indoor fan motor control at hot start

1) Within 7 minutes after starting heating operation, the fan mode is determined depending on the condition of

thermostat (fan control with heating thermostat OFF).

a) Thermostat OFF

i) Operates according to the fan control setting at heating thermostat OFF.

ii) Even if it changes from thermostat OFF to ON, the fan continues to operate with the fan control at thermostat

OFF till the heat exchanger thermistor (ThI-R1 or R2, whichever higher) detects 35°C or higher.

iii) When the heat exchanger thermistor (ThI-R1 or R2, whichever higher) detects 35°C or higher, the fan

operateswiththesetairowvolume.

– 11 –

'14 • KX-SM-202

b) Thermostat ON

i) When the heat exchanger thermistor (ThI-R1 or R2, whichever higher) detects 25°C or lower, the fan is

turned OFF and does not operate.

ii) When the heat exchanger thermistor (ThI-R1 or R2, whichever higher) detects 25°C or higher, the fan

operates with the fan control at heating thermostat OFF.

iii) When the heat exchanger thermistor (ThI-R1 or R2, whichever higher) detects 35°C or higher, the fan

operateswiththesetairowvolume.

c) Ifthe fan controlatheatingthermostat OFFissetat the “Setairowvolume”(from the remotecontrol),the

fanoperateswiththesetairowvolumeregardlessofthethermostatON/OFF.

2) Once the fan motor is changed from OFF to ON during the thermostat ON, the indoor fan motor is not turned

OFF even if the heat exchanger thermistor detects lower than 25

°C.

Note (1) When the defrost control signal is received, it complies with the fan control during defrosting.

3) Once the hot start is completed, it will not restart even if the temperature on the heat exchanger thermistor drops.

(ii) During the hot start, the louver is kept at the horizontal position.

(iii) When the fan motor is turned OFF for 7 minutes continuously after defrosting, the fan motor is turned ON regardless

of the temperatures detected with the indoor heat exchanger thermistors (ThI-R1, R2).

(c) Ending condition

(i) If one of following conditions is met during the hot start control, this control is terminated, and the fan is operated with

thesetairowvolume.

1) Heat exchanger thermistor (ThI-R1 or R2, whichever higher) detects 35

°C or higher.

2) It has elapsed 7 minutes after starting the hot start control.

(6) Hot keep

Hot keep control is performed at the start of the defrost control.

(a) Control

(i) When the indoor heat exchanger temperature (detected with ThI-R1 or R2) drops to 35°C or lower, the speed of

indoor fan is changed to the lower tap at each setting.

(ii) During the hot keep, the louver is kept at the horizontal position.

(b) Ending condition

 Whentheindoorfan isatthe lowertapat eachsetting,itreturnsto thesetairow volumeastheindoorheatexchanger

temperature rises to 45°C or higher.

(7) Auto swing control (FDT, FDTC, FDTW, FDTS, FDE only)

(a) RC-EX1A

(i) Louver control

1) To operate the swing louver when the air conditioner is operating, press the “Direction” button on the TOP screen of

remote control. The wind direction select screen will be displayed.

2) Toswingthelouver,touchthe“Autoswing”button.Theloverwillmoveupanddown.Toxtheswinglouverata

position, touch one of [1] - [4] buttons. The swing lover will stop at the selected position.

3) Louver operation at the power on with a unit having the louver 4-position control function

The louver swings one time automatically (without operating the remote control) at the power on.

This allows the microcomputer recognizing and inputting the louver motor (LM) position.

(ii) Automatic louver level setting during heating

At the hot start and the heating thermostat OFF, regardless whether the auto swing switch is operated or not (auto

swing or louver stop), the louver takes the level position (in order to prevent blowing of cool wind). The louver position

display LCD continues to show the display which has been shown before entering this control.

(iii) Louver free stop control

If you touch the “Menu” → “Next” → “R/C settings” buttons one after another on the TOP screen of remote control,

the “Flap control” screen is displayed. If the free stop is selected on this screen, the louver motor stops upon receipt of

the stop signal from the remote control. If the auto swing signal is received from the remote control, the auto swing will

start from the position before the stop.

– 12 –

'14 • KX-SM-202

(b) RC-E5

(i) Louver control

1) Press the “LOUVER” button to operate the swing louver when the air conditioner is operating.

“SWING ” is displayed for 3 seconds and then the swing louver moves up and down continuously.

2) Toxtheswinglouverataposition,pressonetimethe“LOUVER”buttonwhiletheswinglouverismovingsothat

four stop positions are displayed one after another per second.

When a desired stop position is displayed, press the “LOUVER” button again. The display stops, changes to show

the “STOP 1

” for 5 seconds and then the swing louver stops.

3) Louver operation at the power on with a unit having the louver 4-position control function

The louver swings one time automatically (without operating the remote control) at the power on.

This allows inputting the louver motor (LM) position, which is necessary for the microcomputer to recognize the

louver position.

Note (1) If you press the “LOUVER” button, the swing motion is displayed on the louver position LCD for 10 second. The display changes to the

“SWING ” display 3 seconds later.

(ii) Automatic louver level setting during heating

At the hot start with the heating thermostat OFF, regardless whether the auto swing switch is operated or not (auto

swing or louver stop), the louver takes the level position (In order to prevent the cold start). The louver position display
LCD continues to show the display which has been shown before entering this control.

(iii) Louver-free stop control

When the louver-free stop has been selected with the indoor function of wired remote control “ POSITION”, the

louver motor stops when it receives the stop signal from the remote control. If the auto swing signal is received from the
remote control, the auto swing will start from the position where it was before the stop.

Note (1) When the indoor function of wired remote control “ POSITION” has been switched, switch also the remote control function “

POSITION” in the same way.

(8) Thermostat operation

(a) Cooling

(i) Thermostat is operated with the room temperature control.

(ii) Thermostat is turned ON or OFF relative to the set room temperature as shown below.

(iii) Thermostat is turned ON when the room temperature is in the range of -1 < Set temperature < +1 at the start of cooling

operation (including from heating to cooling).

(b) Heating

(i) Thermostat is operated with the room temperature control.

(ii) Thermostat is turned ON or OFF relative to the set room temperature as shown below.

(iii) Thermostat is turned ON when the room temperature is in the range of -1 < Set point < +1 at the start of cooling opera-

tion (including from cooling to heating).

Thermostat OFF

Set room temperature

Temperature drop

Temperature rise

-1

+1

Thermostat ON

Thermostat OFF

Heater OFF

Temperature rise

Temperature drop

Thermostat ON

Set room temperature

-1

+1

-1

+1

Heater ON

3C

◦

– 13 –

'14 • KX-SM-202

(c) Fan control during heating thermostat OFF

(i) Following fan controls during the heating thermostat OFF can be selected with the indoor function setting of the wired

remote control.

① Low fan speed (Factory default), ② Set fan speed, ③ Intermittence, ④ Fan OFF

(ii) When the “Low fan speed (Factory default)” is selected, the following taps are used for the indoor fans.

・ For AC motor : Lo tap
・ For DC motor : ULo tap

(iii) When the “Set fan speed” is selected, it is operated with the set fan speed also in the thermostat OFF condition.

(iv) If the “Intermittence” is selected, following controls are performed:

1) If the thermostat is turned OFF during the heating operation, the indoor unit fan motor stops.

2) IndoorfanOFFisxedfor5minutes.Afterthe5minutes,theindoorfanisoperatedatLoorULofor2minutes.

In the meantime the louver is controlled at level.

3) After operating at Lo or ULo for 2 minutes, the indoor fan moves to the state of 1) above.

4) If the thermostat is turned ON, it moves to the hot start control.

5) When the heating thermostat is turned OFF, the remote control displays the temperature detected at the fan stop

and revises the temperature later when the indoor fan changes from Lo or ULo to stop.

The remote control uses the operation data display function to display temperatures and updates values of

temperature even when the indoor fan is turned OFF.

6) When the defrosting starts while the heating thermostat is turned OFF or the thermostat is turned OFF during

defrosting, the indoor fan is turned OFF. (Hot keep or hot start control takes priority.) However, the suction

temperature is updated at every 7-minute.

7) When the heating thermostat is turned ON or the operation is changed to another mode (including stop), this

control is stopped immediately, and the operating condition is restored.

(v) When the “Fan OFF” is selected, the fan on the indoor unit of which the thermostat has been turned OFF, is turned OFF.

The same occurs also when the remote control sensor is effective.

(d) Fan control during cooling thermostat OFF

(i) Following fan controls during the cooling thermostat OFF can be selected with the indoor function setting of the wired

remote control.

① Low fan speed, ② Set fan speed (Factory default), ③ Intermittence, ④ Fan OFF

(ii) When the “Low fan speed” is selected, the following taps are used for the indoor fans.

・ For AC motor : Lo tap
・ For DC motor : ULo tap

(iii) When the “Set fan speed” is selected, it is operated with the set fan speed also in the thermostat OFF condition.

(iv) If the “Intermittence” is selected, following controls are performed:

1) If the thermostat is turned OFF during the cooling operation, the indoor unit fan motor stops.

2) IndoorfanOFFisxedfor5minutes.Afterthe5minutes,theindoorfanisoperatedatLoorULofor2minutes.

3) After operating at Lo or ULo for 2 minutes, the indoor fan moves to the state of 1) above.

4) If the thermostat is turned ON, the fan starts operation at set fan speed.

5) When the cooling thermostat is turned OFF, the remote control displays the temperature detected at the fan stop

and revises the temperature later when the indoor fan changes from Lo or ULo to stop.

By using operation data display function at wireless remote control, the tempenature as displayad and the value is

updated including the fan stops.

6) When the cooling thermostat is turned ON or the operation is changed to another mode (including stop), this

control is stopped immediately, and the operating condition is restored.

(v) When the “Fan OFF” is selected, the fan on the indoor unit of which the thermostat has been turned OFF, is turned OFF.

The same occurs also when the remote control sensor is effective.

– 14 –

'14 • KX-SM-202

(9) Filter sign

As the operation time (Total ON time of ON/OFF switch) accumulates to 180 hours

(1)

, “FILTER CLEANING” is displayed on

the remote control. (This is displayed when the unit is in trouble and under the centralized control, regardless of ON/OFF)

 Note(1)Timesettingforthelter signcanbemadeasshownbelow usingtheindoor functionofwiredremotecontrol“FILTERSIGNSET”.(Itis setatTYPE1

at the shipping from factory.)

Filter sign setting

TYPE 1

TYPE 2

TYPE 3

TYPE 4

Function

Setting time: 180 hrs (Factory default)

Setting time: 600 hrs

Setting time: 1,000 hrs

Setting time: 1,000 hrs (Unit stop)

(2)

(2) After the setting time has elapsed, the “FILTER CLEANING” is displayed and, after operating for 24 hours further (counted also during the stop), the unit

stops.

(10) Compressor inching prevention control

(a) Once the indoor unit thermostat has been turned ON, the thermostat is not turned OFF for 2 minutes (*1) after the

compressor ON even if the thermostat is turned OFF at the state of (9).

Thermostat ON/OFF with this control

2 minutes2 minutes

OFF

ON

ON

ON

Stopped by remote control, etc.

＊1

＊1Even when the thermostat of another indoor

unit is turned ON after the compressor ON,
the thermostat is not turned OFF for 2 minutes
after the compressor ON.

＊1

OFF

OFF

3 minutes delay

Thermostat OFF in the condition of (9)

Compressor

Indoor unit A
Thermostat

Indoor unit B
Thermostat

(11) Drain pump control

(a) This control is operated when the inverter frequency is other than 0 Hz during the cooling operation and automatic

cooling and dehumidifying operations.

(b) Drain pump ON condition continues for 5 minutes even when it enters the OFF range according to (i) above after turning

the drain pump ON, and then stops. The 5-minute delay continues also in the event of anomalous stop.

(c) The drain pump is operated with the 5-minute delay operation when the compressor is changed from ON to OFF.

(d) Even in conditions other than the above (such as heating, fan, stop, cooling thermostat OFF), the drain pump control is

performed by the drain detection.

(e) Following settings can be made using the indoor function setting of the wired remote control.

(i)

(ii)

(iii)

(iv)

Note (1) Values in 〔

〕

are for the RC-EX1A model.

ާStandardin cooling & dryި: Drain pump is run during cooling and dry.

ާOperate in standard & heatingި: Drain pump is run during cooling, dry and heating.

ާOperate in heating & fanި: Drain pump is run during cooling, dry, heating and fan.

ާOperate in standard & fanި: Drain pump is run during cooling, dry and fan.

(b) When the oil return control has started while the thermostat is turned ON, the thermostat is not turned OFF even if the

thermostat OFF condition is met during the oil return control.

– 15 –

'14 • KX-SM-202

(12) Drain motor (DM) control

(a)

DraindetectionswitchisturnedONorOFFwiththeoatswitch(FS)andthetimer.

[

＊

1]Draindetectionswitchisturned“ON”whentheoatswitch“Open”isdetectedfor3secondscontinuouslyinthe

drain detectable space.

[

＊

2]Draindetectionswitchisturned“OFF”whentheoatswitch“Close”isdetectedfor10secondscontinuously.

(i) It detects always from 30 seconds after turning the power ON.

1) There is no detection of anomalous draining for 10 seconds after turning the drain pump OFF.

2) Turning the drain detection switch “ON” causes to turn ON the drain pump forcibly.

3) Turning the drain detection switch “OFF” releases the forced drain pump ON condition.

Normal state

[*1] [*2]

Normal state

Drain detection switch ON

Stop

(1)

Indoor unit operation mode

Control A

Control B

Compressor ON

Compressor OFF

Cooling Dry HeatingFan

(2)

Note (1) Including the stop from the cooling, dehumidifying, fan
and heating, and the anomalous stop
(2) Including the “Fan” operation according to the
mismatch of operation modes

(i) Control A

1) Iftheoatswitchdetectsanyanomalousdrainingcondition,theunitstopswiththeanomalousstop(displaysE9)

and the drain pump starts. After detecting the anomalous condition, the drain motor continues to be ON.

2) Itkeepsoperatingwhiletheoatswitchisdetectingtheanomalouscondition.

(ii) Control B

If the oat switch detects any anomalous drain condition, the drain motor is turned ON for 5 minutes, and at 10
seconds after the drain motor OFF it checks the oat switch. If it is normal, the unit is stopped under the normal

mode or, if there is any anomalous condition, E9 is displayed and the drain motor is turned ON. (The ON condition is
maintained during the drain detection.)

(b)

Indoor unit performs the control A or B depending on each operating condition.

(13) Operation check/drain pump test run operation mode

(a)

If the power is turned on by the dip switch (SW7-1) on the indoor PCB when electric power source is supplied, it enters the
mode of operation check/drain pump test run. It is ineffective (prohibited) to change the switch after turning power on.

(b) When the communication with the remote control has been established within 60 seconds after turning power on by the

dip switch (SW7-1) ON, it enters the operation check mode. Unless the remote control communication is established, it
enters the drain pump test run mode.

Note (1) To select the drain pump test run mode, disconnect the remote control connector (CNB) on the indoor PCB to shut down the remote control

communication.

(c) Operation check mode

There is no communication with the outdoor unit but it allows performing operation in respective modes by operating the

remote control.
(d) Drain pump test run mode

As the drain pump test run is established, the drain pump only operates and during the operation protective functions by

the microcomputer of indoor unit become ineffective.

(14) Cooling, dehumidifying frost protection

To prevent frosting during cooling mode or dehumidifying mode operation, the of thermostat-OFF if the indoor heat exchanger
temperature (detected with ThI-R) drops to 1.0 °C or lower at 4 minutes after the thermostat-ON. If the indoor unit heat
exchanger temperature is 1.0 °C or lower after 5 minutes, the indoor unit is controlled thermostat-OFF. If it becomes 10°C or
higher, the control terminates. When the indoor heat exchanger temperature has become as show, the indoor unit send outdoor
unit the “Anti-frost” signal.

101.0

Indoor heat exchanger temperature (°C)

Thermostat-OFF

5 minutes

Thermostat-ON capable

SRC40~60

FDC100~140

Model

Symbol

A

4

4

1

1

1.0

1.0

2.5

2.5

B C

D

• Frost prevention temperature setting can be selected with the

indoor unit function setting of the wired remote control.

Symbol

Item

A

Temperature - Low (Factory default) 1.0
Temperature - High 2.5

– 16 –

'14 • KX-SM-202

(15) Anomalous fan motor

(a)

After starting the fan motor, if the fan motor speed is 200min-1 or less is detected for 30 seconds continuously and 4 times

within 60 minutes, then fan motor stops with the anomalous stop (E16).

(b) If the fan motor fails to reach at -50(FDU: -500)

min

-1

less than the required speed, it stops with the anomalous stop (E20).

(16) High ceiling control

When sufficient air flow rate cannot be obtained from the indoor unit which is installed at a room with high ceiling, the air flow
rate can be increased by changing the fan tap. To change the fan tap, use the indoor unit function “FAN SPEED SET” on the
wired remote control.

--- -- --

PHi1 - Hi

PHi1 - Hi

PHi1 - Me

PHi1 - Me

PHi1 - Hi - Me

PHi1 - Hi - Me

STANDARD

HIGH SPEED1

HIGH SPEED2

FAN SPEED SET

Hi - Lo
Hi - Lo

Hi - Lo

Hi - Me Except FDT

Except FDT, FDTW, FDTS

Only FDT

Only FDT, FDTW, FDTS
Only FDT, FDTW, FDTS

Hi - Me

Hi - M

Hi - Me - Lo

Hi - Me - Lo

Hi - Me - Lo

PHi1 - PHi1 - Hi - Me

PHi2 - Hi - Me - Lo

PHi2 - PHi1 - Hi - Me

PHi1 - Hi - Me - Lo

PHi2 - Hi - Me - Lo

Indoor unit airflow setting

Series

Fan tap

Notes (1) Factory default is STANDARD.

(2) At the hot-start and heating thermostat OFF, or other, the indoor unit fan is operated at the low speed tap of each setting.
(3) This function is not able to be set with wireless remote controls or simple remote control (RCH-E3)

(17)

Abnormal temperature thermistor (return air/indoor heat exchanger) wire/short-circuit detection

(a) Broken wire detection
When the return air temperature thermistor detects -20°C or lower or the heat exchanger temperature thermistor detect

-40°C or lower for 5 seconds continuously, the compressor stops. After a 3-minute delay, the compressor restarts but,

if it is detected again within 60 minutes after the initial detection for 6 minutes continuously, stops again (the return air

temperature thermistor: E7, the heat exchanger temperature thermistor: E6).
(b) Short-circuit detection
If the heat exchanger temperature thermistor detects 70°C or higher for 5 seconds continuously at 2 minutes and 20

seconds after the compressor ON during cooling operation, the compressor stops (E6).

(18) External input/output control (CnT or CnTA)

Be sure to connect the wired remote control to the indoor unit. Without wired remote control remote operation by CnT is not
possible to perform.

・

CnT ・CnTA

①

Operation output (CnT-2: XR1)

②

Heating output (CnT-3: XR2)

③

Thermostat ON output (CnT-4: XR3)

④

Error output (CnT-5: XR4)

⑤

Remote operation input (CnT-6: Volt-free contact)

XR1

1

2

3

4

5

6

XR3

XR4

CnT
Blue

12V

XR2

Option

XR5

■

Priority order for combinations of CnT and CnTA input.

Note (1) Following operation commands are accepted when the operation prohibition is set with CnTA as indicated with *.

Individual operation command from remote control, test run command from outdoor unit and operation command from optional device, CNT input.

Reference: Explanation on the codes and the combinations of codes in the table above

1.

In case of CnT “Number”, the CnT “Number” is adopted and CnTA is invalidated.

2.

In case of CnTA “Number”, the CnTA “Number” is adopted and CnT is invalidated.

3.

In case of CnT “Number”/CnTA “Number”, the CnT “Number” and the CnTA “Number” become independent functions each other.

4.

In case of CnT “Number” + CnTA “Number”, the CnT “Number” and the CnTA “Number” become competing functions each other.

5.

In case of CnT “Number” > CnTA “Number”, the function of CnT “Number” supersedes that of CnTA “Number”.

6.

In case of CnT “Number” < CnTA “Number”, the function of CnTA “Number” supersedes that of CnT “Number”.

(The “Number” above means ① - ⑦ in the table.)

CnTA

Blue

12V

XR6

1

2

Note (1)　 CnTA f un ct ion can be

changed by RC-EX1A.

CnTA

①

Operation

stop level

②

Operation

stop pulse

③

Operation

permission/prohibition

④

Operation

permission/prohibition pulse

⑤

Cooling/heating

selection level

⑥

Cooling/heating

selection pulse

⑦

Emergency

stop

CnT

①

Operation stop level CnT

①

CnT

①

CnT

①

+

CnTA②CnT

①

CnT

①

/

CnTA⑤CnT

①

/

CnTA⑥CnT

①

<

CnTA

⑦

②

Operation stop pulse CnT

②

CnT

②

CnT

②

+

CnTA③CnT

②

CnT

②

/

CnTA⑤CnT

②

/

CnTA⑥CnT

②

<

CnTA

⑦

③

Operation permission/prohibition level

CnT

③

>

CnTA①CnT

③

>

CnTA②CnT

③

+

CnTA③CnT

③

CnT

③

/

CnTA⑤CnT

③

/

CnTA⑥CnT

③

<

CnTA

⑦

④

Operation permission/prohibition pulse

CnT

④

CnT

④

CnT

④

+

CnTA

③

※

CnT

④

CnT

④

/

CnTA⑤CnT

④

/

CnTA⑥CnT

④

<

CnTA

⑦

⑤

Cooling/heating selection level

CnT

⑤

/

CnTA①CnT

⑤

/

CnTA②CnT

⑤

/

CnTA

③

※

CnT

⑤

/

CnTA④CnT

⑤

CnT

⑤

CnT

⑤

/

CnTA

⑦

⑥

Cooling/heating selection pulse

CnT

⑥

/

CnTA①CnT

⑥

/

CnTA②CnT

⑥

/

CnTA③CnT

⑥

/

CnTA④CnT

⑥

CnT

⑥

CnT

⑥

/

CnTA

⑦

⑦

Emergency stop

CnT

⑦

>

CnTA①CnT

⑦

>

CnTA②CnT

⑦

>

CnTA③CnT

⑦

>

CnTA④CnT

⑦

/

CnTA⑤CnT

⑦

/

CnTA⑥CnT

⑦

+

CnTA

⑦

– 17 –

'14 • KX-SM-202

(a) Output for external control (remote display)

Following output connectors (CnT) are provided on the indoor control PCB for monitoring operation status.

①

Operation output:

Outputs DC12V signal for driving relay during operation

②

Heating output:

Outputs DC12V signal for driving relay during heating operation

③

Thermostat ON output:

Outputs DC12V signal for driving relay when compressor is operating.

④

Error output:

Outputs DC12V signal for driving relay when anomalous condition occurs.

(b) Remote operation input

Remote operation input connector (CnT-6 or CnTA) is provided on the indoor control PCB.
However remote operation by CnT-6 or CnTA is not effective, when “Center mode” is selected by center controller.
In case of plural unit (twin, triple, double twin), remote operation input to CnT-6 or CnTA on the slave indoor unit is

invalid.

Only the “LEVEL INPUT” is acceptable for external input

, however when the indoor function setting of “Level
input (Factory default)” or “Pulse input” is selected by the function for “External input” of the wired remote control,
operation status will be changed as follows.

(i) In case of “Level input” setting (Factory default)

InputsignaltoCnT-6orCnTAisOFF→ON……unitON
InputsignaltoCnT-6orCnTAisON→OFF……unitOFF

Operation is not inverted.

ONON

OFF

OFF

OFF

ON

ON

ON

ON

Remote
control OFF

Remote
control ON

OFF

OFF

OFF

CnT-6 or CnTA input

Unit A

Unit B

Note: The latest operation has priority

It is available to operate/stop by remote control or center control

(ii) In case of “Pulse input” setting (Local setting)

ItiseffectiveonlywhentheinputsignaltoCnT-6orCnTA ischangedOFF→ON,andatthattimeunitoperation[ON/

OFF] is inverted.

ONON

OFF

OFF

OFF

ON

ON

ON

ON

Remote
control OFF

Remote
control ON

Remote
control OFF

Remote
control ON

OFF

OFF

ON

ON

OFF

OFF

ON

OFF

OFF

OFF

OFF

ON

ON

OFF

OFF

CnT-6 or CnTA input

Unit A

Unit B

CnT-6 or CnTA input

Unit A

Unit B

– 18 –

'14 • KX-SM-202

(19) Operation permission/prohibition

(In case of adopting card key switches or commercially available timers)

When the indoor function setting of wired remote control for “Operation permission/prohibition” is changed from “Invalid

(Factory default)” to “ Valid”, following control becomes effective.

・

CnT ・CnTA

XR5

Card key

switch

XR1

1

2

3

4

5

6

XR3

XR4

CnT
Blue

12V

XR2

Optional

XR5

Note (1)　 CnTA f un ct ion can be

changed by RC-EX1A.

CnTA

Blue

12V

XR6

1

2

Normal operation

(Factory default)

Operation permission/prohibition mode

“Valid” (Local setting)

CnT-6 or

CnTA

ON OFF ON OFF

Operation Stop

Operation

permission*1

Operation prohibition

(Unit stops)

*1

Only the “LEVEL INPUT” is acceptable for external input

, however when the indoor function setting of

“Level input (Factory default)” or “Pulse input” is selected by the function for “External input” of the wired remote

control, operation status will be changed as follows.

In case of “Level input” setting In case of “Pulse input” setting

Unit operation from the wired

remote control becomes

available*(1)

Unit starts operation

*(2)

*(1) In case that “Operation permission/prohibition mode” setting is “Valid” and “External input” setting is “Level

input (Factory default)”;

①

When card key switch is ON (CnT-6 or CnTA ON: Operation permission), start/stop operation of the unit

from the wired remote control becomes available.

②

When card key switch is OFF (CnT-6 or CnTA OFF: Operation prohibition), the unit stops operation in

conjunction with OFF signal, and start/stop operation of the unit from the wired remote control becomes not

available.

*(2) In case that “Operation permission/prohibition mode” setting is “Valid” and “External input” setting is “Pulse

input (Local setting)”;

①

When card key switch is ON (Operation permission), the unit starts operation in conjunction with ON signal.

and also start/stop operation of the unit from the wired remote control becomes available.

②

When card key switch is OFF (Operation prohibition), the unit stops operation in conjunction with OFF signal, and

start/stop operation of the unit from the wired remote control becomes not available.

(3) This function is invalid only at “Center mode” setting done by central control.

(a) In case of CnT① Operation stop level > CnTA③ Operation permission/prohibition level

(

※

) CnT level input supersedes CnTA operation prohibition.

Operation permission Operation permission

CnTԘ
Level input

CnTAԚ
Operation permission/
prohibition setting

Operation permission/
prohibition zone

Actual operation

Operation permission

Operation prohibition

Operation

Operation Operation

Operation

Operation()

Operation

Prohibition

StopStopStop

Stop Stop Stop

Prohibition

– 19 –

'14 • KX-SM-202

(b) In case of CnT③ Operation permission/prohibition level + CnTA③ Operation permission/prohibition level

(

※

) Operation prohibition zone is determined by the OR judgment between CnT Operation prohibition zone and CnTA

Operation prohibition zone.

CnTԚ
Operation permission
prohibition setting

CnTAԚ
Operation permission/
prohibition setting

Operation permission/
prohibition zone

Operation permission Operation permission

Operation permission

Operation permission

Operation
permission

Operation
permission

Operation

permission
Operation
permission

Operation()
permission

(20) Selection of cooling/heating external input function

(a) When “External input 1 setting: Cooling/heating” is set for the indoor unit function from remote control, the cooling or

heating is selected with CnT-6 or CnTA.

(b) When the External input 1 method selection: Level input is set for the indoor unit function:

・

CnT-6orCnTA:OPEN→Coolingoperationmode

・

CnT-6orCnTA:CLOSE→Heatingoperationmode

(c) When the External input 1 method selection: Pulse input is set for the indoor unit function:

If the external input is changed OPEN → CLOSE, operation modes are inverted (Cooling → Heating or Heating →

Cooling).

Operation Operation Operation

Stop Stop Stop Stop

Operation
prohibition

Operation
prohibition

Operation
prohibition

Operation
prohibition

Operation
prohibition

Operation
prohibition

Operation
permission

Operation permission Operation permission

Operation
permission

CnTA
Operation/
stop pulse

CnT
Operation permission/
prohibition level

Operation permission/
prohibition zone

Actual operation

Remote control

CnT
Operation/
stop pulse

CnTA
Operation permission/
prohibition level

Operation permission/
prohibition zone

Actual operation

Remote control

Remote
control ON

Remote
control OFF

Remote
control ON

Remote
control ON

Remote
control OFF

Remote
control ON

ON ON

ON ON

ON ON ON

OFF OFF OFF OFF

OFFOFF

OFF

ON ON

OFF

ON ON ON ON ON

OFF OFF OFF OFF

OFF OFF

OperationOperation Operation Operation

Stop Stop Stop Stop Stop

(c) In case of CnT ③ Operation permission/prohibition level > CnTA ② Operation/stop pulse

(d) In case of CnT ② Operation/stop pulse + CnTA ③ Operation permission/prohibition level

Note (1) If it is prohibited by CnT, all “Operation” and “Stop” commands are not accepted.

– 20 –

'14 • KX-SM-202

(d) If the cooling/heating selection signal is given by the external input, the operation mode is transmitted to the remote

control.

■

Selection of cooling/heating external input function

Notes (1) Regarding the priority order for combinations of CnT and CnTA, refer to Page 16.

External input selection

External input selection

Cooling/heating selection

External input method

⑤ Level

External terminal input
(CnT or CnTA)

Cooling/heating

Cooling/heating
(Competitive)

External terminal input
(CnT or CnTA)

Cooling/heating

Cooling/heating
(Competitive)

⑥Pulse

Operation

OFF

Cooling zone

Heating zone Cooling zone

Cooling zoneHeating zone Heating zone

OFF

ON

OFFOFF

ON ON

ON

Cooling

Heating Heating

Cooling

Cooling

Cooling

Auto

Auto

Cooling

Auto, cooling, dry mode↑
command from remote control

↑Heating, auto, heating mode
command from remote control

↑Set “Cooling/
Heating” “Pulse”

↑Auto, cooling, dry mode
command by remote control

↑Auto, heating mode
command by remote control

↑After setting “Cooling/heating selection”, the cooling/heating is
selected by the current operation mode.
During heating:: Set at the heating zone (cooling prohibition zone).
During cooling, dry, auto and fan mode: Set
at cooling zone (heating prohibition zone).

Heating

Heating

Heating

Cooling

Heating

Cooling

Cooling

(21) Room temperature detection temperature compensation during heating

Withthestandardspecication,thecompressoristurnedON/OFFwiththethermostatsettingtemperature.Whenthethermostat

is likely to turn OFF earlier because the unit is installed at the ceiling where warm air tends to accumulate, the setting can be
changed with the wired remote control indoor unit function “ ”. The compressor and the heater are turned ON/OFF at
one of the setting temperature +3, +2 or +1°C in order to improve the feeling of heating. The setting temperature, however, has
the upper limit of 30°C.

Compressor Compressor

Standard

Operation

Stop

Setting temperature

-1 +1

Room temperature (deg)

Operation

Stop

Setting temperature

+2 +4

Room temperature (deg)

When it is set at +3°C

(22) Return air temperature compensation

This is the function to compensate the deviation between the detection temperature by the return air temperature thermistor and
the measured temperature after installing the unit.
(a) It is adjustable in the unit of 0.5°C with the wired remote control indoor unit function “RETURN AIR TEMP”.

• +1.0°C, +1.5°C, +2.0°C • -1.0°C, -1.5°C, -2.0°C

(b) Compensated temperature is transmitted to the remote control and the compressor to control them.

Note (1) The detection temperature compensation is effective on the indoor unit thermistor only.

(23) High power operation (RC-EX1A only)

Itoperatesatwith the set temp. xed at 16°C for cooling, 30°C for heating and maximum indoor fan speed for 15 minutes

maximum.

(24) Energy-saving operation (RC-EX1A only)

It operates with the setting temperature fixed at 28°C for cooling, 22°C for heating or 25°C for auto. (Maximum capacity is
restricted at 80%.)

(25) Warm-up control (RC-EX1A only)

Operation will be started 5 to 60 minutes before use according to the forecast made by the microcomputer which calculates
when the operation should be started in order to warm up the indoor temperature near the setting temperature at the setting time
of operation start.

– 21 –

'14 • KX-SM-202

(26) Home leave mode (RC-EX1A only)

When the unit is not used for a long period of time, the room temperature is maintained at a moderate leval, avoiding extremely
hot or cool temperature.
(a) Cooling or heating is operated according to the outdoor temperature (factory setting 35°C for cooling, 0°C for heating)

and the set temp. (factory setting 33°C for cooling, 10°C for heating

)

(b) Set temp and indoor fan speed can be set by RC-EX1A.

(27) Auto temp. setting (RC-EX1A only)

Setting temperature is adjusted automatically at the adequate temperature the center set temp. is 24°C by correcting the outdoor
air temperature.

(28) Fan circulator operation (RC-EX1A only)

When the fan is used for circulation, the unit is operated as follows depending on the setting with the remote control.

(a) If the invalid is selected with the remote control, the fan is operated continuously during the fan operation. (mormal fan

mode)

(b) If the valid is selected with the remote control, the fan is operated or stopped when on the difference of

the remote control

temperature sensor and the indoor unit return air temperature sensor becomes bigger than 3

°C.

(29) The operation judgment is executed every 5 minutes (RC-EX1A only)

Setting temperature Ts is changed according to outdoor temperature
This control is valid with cooling and heating mode. (NOT auto mode)
(a) Operate 5 minutes forcedly.

(b) Setting temperature is adjusted every 10 minutes.

(i) Cooling mode.

Ts = outdoor temperature － offset value

(ii) Heating mode.

Ts = outdoor temperature － offset value

(c)

If the return air temperature lower than 18°C or return air temperature becomes lower than 25°C, unit goes thermo OFF.

(30) Auto fan speed control (RC-EX1A only)

Inordertoreachtheroomtemperaturetothesettemperatureasquicklyaspossible,theairowrateisincreasedwhentheset

temperature of thermostat differs largely from the return air temperature. According to temperature difference be tureen set
temperature and return air temperature, indoor fan tap are controlled automalically.

・

Auto1:ChangestheindoorunitfantapwithintherangeofHi↔Me↔Lo.

・

Auto2:ChangestheindoorunitfantapwithintherangeofPHi↔Hi↔Me↔Lo.

(31) IU overload alarm (RC-EX1A only)

Ifthefollowingconditionissatisedat30minutesafterstartingoperation,RC-EX1Ashowsmaintenancecode"M07"andthe

signal is transmitted to the external output (CnT-5).

(a) Receipt of the signal by the external output is indicated by lighting an LED or other prepared on site.

・

Cooling, Dry, Auto(Cooling) : Indoor air temperature = Set room temperature by remote control + Alarm temperature difference

・

Heating, Auto(Heating)

: Indoor air temperature = Set room temperature by remote control - Alarm temperature difference

Alarm temperature difference is selectable between 5 to 10°C.

(b) If the following condition is satisfied or unit is stopped, the signal is disappeared.

・

Cooling, Dry, Auto(Cooling) : Indoor air temperature = Set room temperature + Alarm temperature difference -2

°C

・

Heating, Auto(Heating)

: Indoor air temperature = Set room temperature - Alarm temperature difference +2

°C

(32) Peak-cut time (RC-EX1A only)

Power consumption can be reduced by restricting the maximum capacity.
Set the [Start time], the [End time] and the capacity limit % (Peak-cut %).

・

4-operation patterns per day can be set at maximum.

・

The setting time can be changed by 5-minutes interval.

・

The selectable range of capacity limit % (Peak-cut %) is from 0% to 40-80% (20% interval)

.

・

Holiday setting is available.

– 22 –

'14 • KX-SM-202

1.4 Operation control function by the outdoor control

(A) Normal control

(1) Operation of major functional components under each operation mode

Functional
Components

Indoor unit fan

Compressor [CM1]

Compressor [CM2]

Outdoor unit fan [FMo-1]

Outdoor unit fan [FMo-2]

4 way valve [20S]

Solenoid valve [SV6] [SV7]

Solenoid valve [SV11]

Electronic expansion valve
for heating [EEVH1, 2]

Electronic expansion valve
for sub-cooling [EEVSC]

Indoor unit electronic
expansion valve

Operation

mode

Cooling Heating

Defrost

Thermostat OFFThermostat ONThermostat OFFThermostat ON

Fan

Dehumidify

Remote control
command

Superheating
control response

Outlet temperature
control response

Superheating
Control Response

Fully closed Fully closed

Slight opening

control

Model-specific
aperture opening
angle

Fully open

※1

※3

Fully open

※3※4

Fully closed※2Fully closed Fully closed Fully closed Fully closed

※2

Superheating
control response

Opening pulse
control

Fully closed
/ Fully open

Opening pulse
control

Remote control
command

Remote control
command

Remote control
command

Intermittent
operation

→  / 

/ 

/ 



→ 

→ 

→ 





/ 

/ / 

 /

 /









/ 

/ 

Inverter cooling fan
[FMC1, 2]

/ / / / / / 

/  







 

/ 

/ 





/ 



/ 



Solenoid valve [20UF]

/  /  /  /  / 











Magnetic contactor CM1
[52X1]

 /

Magnetic contactor CM2
[52X2]



Solenoid valve [SV1]

/    /   /  / 

Solenoid valve [SV2]

/    /   /  / 

Crankcase heater [CH1,2]

/  /  /  /  /  /  / 

Notes(1)  : ON,  : OFF, /, /: ON or OFF
(2) ※1: The EEVH1, 2 of master unit are fully opened and those of slave unit are fully closed.
(3) ※2: When the unit is stopped from cooling operation, the EEVH1, 2 of master unit are fully opened and those of slave unit are fully closed.

When the unit is stopped from heating operation, the EEVH1, 2 of both master and slave units are fully closed unless the opening degree is specified
by the low pressure protective control.

(4) ※3: When the operation mode is changed from heating to cooling/dehumidifying, EEVH1, 2 are maintained at fully closed position and EEV of only one

indoor unit keeps 60 pulse until 20S is turned OFF.

(5) ※4: When the operation mode is changed from cooling/dehumidifying to heating, EEVH1, 2 are maintained at fully opened position and EEVs of all

indoor units keep 0 pulse until 20S is turned ON.

(6) This shows the state of output when all indoor units are in the same operation mode.

F

ES P - FP-210 0

– 23 –

'14 • KX-SM-202

(2) Compressor control (Master unit/slave unit)

(a) Starting compressor

(i) Compressor starting order

Afterturningthepoweron,rstlyCM1compressorstarts.(Incaseofthecombinationuse,itisCM01ofmasterunit)

And corresponding to the condition of under-dome temperature and to the required capacity of indoor units thermo-

statON,thenextcompressorwillstartsequentially,andnallymaximum6compressors(incaseof3outdoorunits

combination use) will start simultaneously.

1) Single use (Model 280, 335)

CM1

Range of the compressor operation speed relative to load is as follows.

System load range

(Number of operating outdoor units)

0

1

Local load range

(Number of compressors operating in outdoor units)

0 1

CM1

0rps 20−140rps

＊

Note(1)

＊

only model 355 is MAX 140rps, model 280 is MAX 120rps.

2) Single use (Model 400, 450)

CM1

Range of the compressor operation frequency relative to load is as follows.

System load range

0

1

Local load range

0 1

CM1

0rps 20−120rps

3) Single use (Model 475, 500, 560 : 2 compressors specification)

CM1 CM2

Range of the compressor operation frequency relative to load is as follows.

System load range

0

1

Local load range

0 1 2

CM1

0rps 20−112rps 31−120rps

CM2

0rps 0rps 31−120rps

4) 2 outdoor units combination use (Model 615, 670)

Master unit

Slave unit

CM01 CM11

(CM1)(CM1)

Range of the compressor operation frequency relative to load is as follows. Following table is applicable when CM01 starts initially.

System load range

0

1 1

Local load range

0 1 1

Master unit CM01

0rps 20−112rps 31−120rps

Slave unit CM11

0rps 0rps 31−120rps

– 24 –

'14 • KX-SM-202

5) 2 outdoor units combination use (Model 735)

Model 400 (Master) + 335 (Slave)

Master unit Slave unit

CM01 CM11

(CM1)(CM1)

Range of the compressor operation speed relative to load is as follows. Following table is applicable when CM01 starts initially.

System load range

0

1 2

Local load range

0 1 1

Master unit CM01

0rps 20−112rps 52−120rps

Slave unit CM11

0rps 0rps 31−70rps

Model 335 (Master) + 400 (Slave)

Master unit Slave unit

CM01 CM11

(CM1)(CM1)

Range of the compressor operation speed relative to load is as follows. Following table is applicable when CM01 starts initially.

System load range

0

1 2

Local load range

0 1 1

Master unit CM01

0rps 21−65rps 31−70rps

Slave unit CM11

0rps 0rps 52−120rps

6) 2 outdoor units combination use (Model 800, 850, 900)

Master unit

Slave unit

CM01 CM11

(CM1)(CM1)

Range of the compressor operation speed relative to load is as follows. Following table is applicable when CM01 starts initially.

System load range

0

1 2

Local load range

0 1 1

Master unit CM01

0rps 20−65rps 31−120rps

Slave unit CM11

0rps 0rps 31−120rps

7) 2 outdoor units combination use (Model 950, 1000, 1060, 1120)

Master unit

Slave unit

CM01 CM11

(CM1)(CM1)

CM02 CM12

(CM2)(CM2)

Range of the compressor operation speed relative to load is as follows. Following table is applicable when CM01 starts initially.

System load range

0

1 2

Local load range

0 1 1 2

Master

unit

CM01

0rps 20−112rps 31−112rps 31−120rps

CM02

0rps 0rps 0rps 31−120rps

Slave

unit

CM11

0rps 0rps 31−112rps 31−120rps

CM12

0rps 0rps 0rps 31−120rps

– 25 –

'14 • KX-SM-202

9) 3 outdoor units combination use (Model 1200, 1250, 1300, 1350)

Master unit

Slave unit 1 Slave unit 2

CM01 CM11

(CM1)

CM21

(CM1)(CM1)

Range of the compressor operation speed relative to load is as follows. Following table is applicable when CM01 starts initially.

System load range

0

1 2 3

Local load range

0 1 1 1

Master unit CM01

0rps 20−112rps 31−65rps 31−120rps

Slave unit 1 CM11

0rps 0rps 31−65rps 31−120rps

Slave unit 2 CM21

0rps 0rps 0rps 31−120rps

10) 3 outdoor units combination use (Model 1425, 1450, 1500, 1560, 1620, 1680)

Master unit

Slave unit 1 Slave unit 2

CM01 CM11

(CM1)(CM1)

CM02 CM12

(CM2)

CM21

(CM1)

CM22

(CM2)(CM2)

Range of the compressor operation speed relative to load is as follows. Following table is applicable when CM01 starts initially.

System load range

0

1 2 3

Local load range

0 0 1 1 2

Master

unit

CM01

0rps 20−112rps 31−112rps 31−112rps 31−120rps

CM02

0rps 0rps 0rps 0rps 31−120rps

Slave
unit 1

CM11

0rps 0rps 31−112rps 31−112rps 31−120rps

CM12

0rps 0rps 0rps 0rps 31−120rps

Slave
unit 2

CM21

0rps 0rps 0rps 31−112rps 31−120rps

CM22

0rps 0rps 0rps 0rps 31−120rps

(ii) Rotation of compressor start/stop order

1) The compressors will be changed over by determinating the start/stop order in each heat load zone.

2) In case of single use, the starting order of CM1 and CM2 will be changed over on each occasion when the out

-

door unit stops.

3) In case of combination use, the starting order of CM01(CM11)

〔

CM21〕 and CM02(CM12) 〔CM22

〕

will be

changed over on each occation when the master unit or slave unit stops all independently.

4) In case of combination use, the starting order of master and slave units will be changed over on each occasion

when the master unit or slave unit stops all independently.

Startingorderofoutdoorunits Master→Slave→Master

– 26 –

'14 • KX-SM-202

(3) Outdoor fan control (Master unit/slave unit)

(a) Outdoor fan speed and fan motor rotation speed

Fan tap

Cooling Heating Remarks˝

FMo1 FMo2 FMo1 FMo2

0th speed 0 0 0 0 stop

1st speed 0 160 0 160

Min. speed at 1 FM operation

2nd speed 200 200 0 400

Max. speed at 1 FM operation

(During heating)

3rd speed 300 300 160 160

Min. speed at 2 FM operation

(During heating)

4th speed 400 400 1140 1140

Max. speed at 2 FM operation

(During heating)

Rated speed of heating

5th speed 500 500 − −

6th speed 600 600 − −

7th speed 700 700 − −

8th speed 800 800 − −

9th speed 900 900 − −

10th speed 1000 1000 − −

11th speed 1100 1100 − −

12th speed 1140 1140 − − Rated speed of cooling

(b) Outdoor fan control in cooling mode

Fan speed is controlled based on the high pressure during cooling/dehumidifying (detected with PSH) and the outdoor air

temperature (detected with Tho-A).

(i) Initial fan speed is as follows.

Initial cooling speed of outdoor fan

Outdoor temperature ≦ 10°C

10°C ≦ Outdoor temperature ＜ 15°C

15°C

≦

Outdoor temperature

2nd speed 4th speed 6th speed

(ii) Speed changes depending on high pressure values.

(c)

Outdoor fan control in heating mode

Fan speed is controlled based on the low pressure (detected with PSL) during heating operation.

(i) Speed changes depending on low pressure values.

(ii) Under normal condition, the stepless fan control between 1st speed and 4th speed is performed.

Unit : min

-1

– 27 –

'14 • KX-SM-202

(4) Defrosting (Master unit/Slave unit)

If the defrost starting conditions at the outdoor heat exchanger are established, defrost operation starts.

(a) Temperature conditions for defrosting

(i) Conditions for starting defrost

Whenalloffollowingconditionsaresatised,defrostoperationwillbestarted.

1) When the cumul ative operati on time

of the compressor becomes 33 minutes

afte r co mplet ion of previ ous defro st

operation, or it becomes 33 minutes after

heating operation starts.

2) When 8 minutes have elapsed after one

compressor is turned ON from the state

of all compressors OFF.

3) When 8 minutes have elapsed after one

outdoor fan is turned ON from the state

of all outdoor fan OFF.

4) Wheneitheroffollowingconditionsisestablishedafteralloftheaboveconditionsaresatised.

•

When the temperatures detected with the outdoor heat exchanger temperature thermistor (Tho-R1,-R2) and

outdoor air temperature thermistor (Tho-A) are below the defrost starting temperature mentioned in the above

graph continuously for 3 minutes.

•

When t he suction pressure saturation

temperature has continued for 3 minutes

in the defrost zone which is determined

by the outdoor air temperature sensor

(Fig. 2)

(ii) Conditions for finishing defrost

• Standard (J14 is shorted)

1) When the temperature detected with both outdoor heat exchanger temperature thermistors (Tho-R1 and

Tho-R2) is higher than 9ºC

2) Or when 12 minutes have elapsed since defrosting started.

• Cold region setting (J14 is open)

1) When (Tho-R1 and Tho-R2)

>

=

9ºC is satised,after2 minutes and30secondshave elapsedsincedefrosting

started,andwheneitheroffollowingconditionsissatised,thedefrostingendoperationstarts.

a) 2 minutes and 30 seconds have elapsed since the temperature of either Tho-R1 or Tho-R2 was 14ºC or

higher

b) The temperature of either Tho-R1 or Tho-R2 is 30ºC or higher.

c) 14 minutes have elapsed since defrosting started.

2) When (Tho-R1andTho-R2)<9ºCissatised,after2minutesand30secondshaveelapsedsincedefrosting

started,andwheneitheroffollowingconditionsissatised,thedefrostingendoperationstarts.

a) 5 minutes have elapsed since the temperature of either Tho-R1 or Tho-R2 was 14ºC or higher.

b) The temperature of either Tho-R1 or Tho-R2 is 30ºC or higher.

c) 14 minutes have elapsed since defrosting started.

-20 -15 6

J15 opened
Cold region
specification

J15 shorted

Outdoor air temp. (ºC) [Tho-A]

Cold region

Defrost start zone

Standard

(Factory setting)

Heat exchanger temp. (°C) [Tho-R]

Fig.1

-2

-6

-15

-19

-21

-25

-20

-15 6

J15 opened
Cold region
specification

J15 shorted

Outdoor air temp. (ºC) [Tho-A]

Cold region

Defrost start zone

Standard

(Factory setting)

5WEVKQPRTGUUWTGUCVWTCVKQPVGORGTCVWTG°C

Fig.2

-6

-10

-19

-23

-25

-29

– 28 –

'14 • KX-SM-202

(5) Protective control

(a) High pressure protective control/error

If the high pressure exceeds 3.7 MPa, the compressor speed is reduced gradually.

It reduces to 20 rps at the lowest.

If the high pressure still rises to 4.15 MPa, the compressor stops.

(b)

Low pressure protective control/error

If the low pressure drops below 0.18 MPa, the compressor speed is reduced gradually.

It reduces to 20 rps at the lowest.

If the low pressure still drops below 0.134 MPa, the compressor stops.

(c)

Discharge pipe temperature control/error

If discharge pipe temperatures (detected with Tho-D1, -D2) exceed 120ºC, the compressor speed is reduced gradually. (To 20

rps at the lowest) If the temperatures still continue to rise beyond 130ºC, the compressor stops.

(d) Compressor compression ratio protective control

If the compressor compression ratio exceeds the setting value, the compressor speed is reduced gradually.

It reduces to 20 rps at the lowest.

(e)

Current safe control

(i) The current safe control monitors current values at T-phase of inverter. If the value exceeds the setting value, the com

-

pressor speed is reduced.

If the value is higher than the setting value even if the speed is reduced, the speed is reduced further.

(ii) This control is reset if the current value at T-phase of inverter becomes lower than the setting value – 1 A for 3 minutes

continuously or lower than the setting value for 6 minutes continuously.

(f)

Current cut control

(i) Current sensor built in the power transistor monitors current values output from the inverter. If the value exceeds 88 A,

the current cut control stops the compressor. The compressor starts automatically 3 minutes after the stop.

(ii) If the above control activates 4 times within 15 minutes, 52C1 or 52C2 is turned off, and the operation is stopped with

the error stop.

State of the error continues for 3 minutes after the error stop. The error can be reset by operating the inspection reset

from the remote control.

(g)

Power transistor temperature (PT) protective control

If temperatures on the power transistor exceed the setting value, the compressor speed is reduced gradually.

It reduces to 20 rps at the lowest.

(h)

Under-dome temperature protective control

If the under-dome temperature exceeds the setting value, the compressor speed is reduced gradually.

It reduces to 20 rps at the lowest.

(i) Protection for combination of outdoor units (Master unit)

The capacity of connectable outdoor units is checked when the communication check is performed after turning the power ON.

If the checked result is other than the allowable combinations mentioned in the following table ① it is prohibited to start

operation due to outdoor unit combination error.

When this error occurs, the error code mentioned in the following table

②

is displayed on the 7-segment display.

Table②Contents displayed on 7-segment display at the combination error

Table①combination list

Code display area Data display area Contents of invalid operation

3OPE

Invalid combination of outdoor units

Capacity

615
670
735
800
850
900

950
1000
1060
1120

Combination patterns

Combination（280+335)
Combination（335+335)
Combination（335+400)
Combination（400+400)
Combination（400+450)
Combination（450+450)
Combination（475+475)
Combination（500+500)
Combination（500+560)
Combination（560+560)

Capacity

1200
1250
1300
1350
1425
1450
1500
1560
1620
1680

Combination patterns

Combination（400+400+400)
Combination（400+400+450)
Combination（400+450+450)
Combination（450+450+450)
Combination（475+475+475)
Combination（475+475+500)
Combination（500+500+500)
Combination（500+500+560)
Combination（500+560+560)
Combination（560+560+560)

– 29 –

'14 • KX-SM-202

(6) Auto backup operation

(a) Classi cation of auto backup operations

When the auto backup operation is enabled, anomaly stops are classifiedas follows and countermeasures are provided for
respective categories.

System stop: All stop including master/slave units
Unit stop: Stop in the unit of outdoor unit
Compressor stop: Stop in the unit of compressor

(b) Control contents of auto backup operation

(i) Condition of auto backup operation is established when the dip switch SW3-2 on the PCB of master unit is turned

ON (selected).

(ii) However, the switching of SW3-2 is effective only at the power on. (It does not become effective unless the power

supply is reset.)

(iii)

Anomaly contents in the following table are invalid and are not detected when the auto backup is effective.

Anomaly detection invalid code SW3-2ON Anomaly detection invalid code SW3-2ON

E32: Open L3 phase on power supply at

primary side

E45: Communication error between inverter

PCB and outdoor control PCB

E36: Discharge pipe temperature error E48: Outdoor DC fan motor anomaly

E37: Outdoor heat exchanger and sub-cooling

coil temperature thernistor anomaly

E51: Power transister overheat

(Continuousness)

E38: Outdoor air temperature thermistor

anomaly

E53: Suction pipe temperature thermistor

anomaly

E55: Under-dome temperature thermistor

anomaly

E39: Discharge pipe temperature thermistor

anomaly

E40: High pressure anomaly

E56: Power transitor temperature thermistor

anomaly

○

○

○

○

○

○

○

○

○

○

○

○

E41: Power transister overheat

E58: Anomalous compressor by loss

synchronism

E42: Current cut

E44: Liquid flooding anomaly

E59: Compressor startup failure

E60: Rotor position detection failure

○

○
○

○

○
○

(iv)Ifanyanomalyoccurswhentheautobackupiseffective,theoperationoutput(CnH),Anomalyoutput(CnY),7-seg-

ment display and LED show as follows.

1) At the system stop
Operation output on the master unit is turned OFF, the Anomaly output is turned ON, 7-segment display and
LED show the anomaly, and the remote control displays E??. (To reset the anomaly, it is necessary to reset the
inspection from the remote control.)

2) At the unit stop
On the anomaly occurred unit only, the operation output is turned OFF, the Anomaly output is turned ON, 7-segment
display and LED show the anomaly and normal units continue their operation ON(or stop).
To reset the state of anomaly on the unit the anomaly occurred, it depends on the condition to reset the state of each anomaly.

3) At the compressor stop
Only the compressor concerned stops, previous states are maintained on the operation output, anomaly output,
7-segment display and LED. To reset the state of anomaly on the compressor, it depends on the condition to reset
the state of each anomaly.

– 30 –

'14 • KX-SM-202

E31

E32

E36

E37

E38

E39

E40

E41

E42

E43

E44

Duplicated outdoor unit address No.

Open L3 Phase on power supply at primary side

Discharge pipe temperature error

Outdoor air temperature thermistor anomaly

Discharge pipe temperature thermistor anomaly

High pressure anomaly

Power thansistor overheat

Current cut

Anomaly contents

Anomalous stop of master outdoor unit Anomalous stop of slave outdoor unit

System stop Unit stop

Compressor stop

System stop Unit stop

Compressor stop

Remote control

error display

Outdoor heat exchanger and subcooling
coil temperature thermistor anomaly

Liquid flooding anomaly

Excessive number of indoor unit connected,
excessive to tal capacity of connection

E45

E48

E49

E51

E53

E54

E55

E56

E59

E60

E61

E63

Outdoor DC fan motor anomaly

Low pressure error

Suction pipe temperature thermistor anomaly

Under-dome temperature thermistor anomaly

Power transitor temperture thermistor anomaly

Compressor startup failure

Rotor position detection failure

Emergency stop

Communication error between inverter
PCB and outdoor control PCB

High pressure sensor/Low pressure
sensor anomaly

Power transister overheat (continuousness)

Communications error between the master
unit and slave units

Backup operation function is only for emergency purpose when one of compressors or one of units is damaged.

If backup operation is performed continuously for long period, it may cause the damage of good compressors.

Accordingly be sure to repair the damaged unit or to replace the damaged compressor and to cancel the

backup operation within 48 hours after starting backup operation.

(c) Prohibiting conditions of auto backup operation

(i) When the conditions of oil return control are not established

(ii)

When the backup operation time has exceeded the limit value

(d) Control after the conditions to prohibit the auto backup operation have been established

All compressor stop, and the error display [E-XX] is shown on the 7-segment display and the remote control.
In this state, the inspection reset of remote control is effective. → [E-XX] is displayed continuously on the remote con-

In this state, the inspection reset of remote control is effective. → [E-XX] is displayed continuously on the remote con­trol.

E45

E48

E49

E51

E53

E54

E55

E56

E59

E60

E61

E63

Outdoor DC fan motor anomaly

Low pressure error

Suction pipe temperature thermistor anomaly

Under-dome temperature thermistor anomaly

Power transitor temperture thermistor anomaly

Compressor startup failure

Rotor position detection failure

Emergency stop

Communication error between inverter
PCB and outdoor control PCB

High pressure sensor/Low pressure
sensor anomaly

Power transister overheat (continuousness)

Communications error between the master
unit and slave units

Backup operation function is only for emergency purpose when one of compressors or one of units is damaged.

If backup operation is performed continuously for long period, it may cause the damage of good compressors.

Accordingly be sure to repair the damaged unit or to replace the damaged compressor and to cancel the backup operation

within 48 hours after starting backup operation.

(c) Prohibiting conditions of auto backup operation

(i) When the conditions of oil return control are not established

(ii) When the backup operation time has exceeded the limit value

(d) Control after the conditions to prohibit the auto backup operation have been established

All compressor stop, and the error display [E-XX] is shown on the 7-segment display and the remote control.

trol.

– 31 –

'14 • KX-SM-202

(7) Test run

(a) This control can be performed from the master unit, not from the slave unit.

If this control is done from the slave unit, the following display is shown on the 7-segement display.

The display returns to normal display if the test run control switch is reset.

(b) Test run from master outdoor units with dip switches SW5-1 and SW5-2.

Take note that this operation has priority over other option devices such as center console and etc.

This operation status is transmitted to the option devices.

(Note) Test run operation by external input is also available with following method. (Refer next page for detail)

• Select the external input terminal (CnS1) and set 7-segment [P11]-[6] for the function of SW5-1, and select the external input terminal (CnS2) and

set 7-segment [P12]-[7] for the function of SW5-2.

• Other combination of external input terminals (CnS1, CnS2, CnG1, CnG2) and of setting function with 7-segment ([P11], [P12], [P13], [P14] and

-[6], -[7]) are avilable to use.

(c) Starting conditions of test run operation

(i) Dip switch SW5-1 is turned ON. However the input before the power ON is invalid.

(ii) The dip switches SW3 and SW5, other than SW5-1and SW5-2, should be turned OFF.

However, regarding the dip switch SW3-2 for automatic backup operation, it is invalid during test run operation

regardlesswhetherSW3-2isturnedON(valid)orOFF(invalid).→Inordertochecktroubleduringtestrunoperation.

(d) Control during test run (If indoor units are normal)

(i) Heating operation is performed with SW5-2 OFF, while cooling operation is performed with SW5-2 ON.

(ii) IndoorEEVcontrolattheendoftestrunisdependedonthespecicationsoftheindoorunit.

(iii)

Cooling operation: Compressor frequency control is depended on the cooling low pressure control.

(iv) Heating operation: Compressor frequency control is depended on the heating high pressure control.

(e) Ending conditions of test run operation

Testrunoperationisterminatedifoneoffollowingconditionsissatised.

(i) Test run operation ends when the dip switch SW5-1 is turned OFF.

(ii)

When the operation is stopped by the error control during test run, the error is displayed same as the normal operation

and the state of error stop is retained even if SW5-1 is turned OFF.

Code indicator Data indicator Contents of invalid operation

10OPE

Slave setting is invalid.

ON

SW5-1

SW5-2

OFF

ON

OFF

Test run for heating

Test run for cooling

Normally operation and after test operation

CnS1

Shorted CnS2

Open Test run for heating

Shorted Test run for cooling

Open

Normal operation and after test operation

-

32

-

(1) External input and demand input (Master unit/Slave unit)

(a) Operation permission or prohibition mode

(Note) Following explanation is based on using CnS1 terminal and setting function [P07]-[0] with 7-segment display.

However other terminals can be used with following function setting of 7-segment display.

CnS2: [P08]-[0] CnG1: [P09]-[0] CnG2: [P10]-[0]

1) Operation permission or prohibition mode is switched with the connector (CnS1) and the Jumper wire (J13) on

the outdoor control PCB after setting function [P07]-[0] (Factory setting) with 7-segment display

2) Operation permission/prohibition control by the external input CnS1 to outdoor unit.

Note (1) Factory setting J13: Shorted, CnS1: Shorted (Short pin is connected)

(B) Option controls

• External input terminal

①

4 External input terminals (CnS1, CnS2, CnG1 and CnG2) are provided. (See Fig-1)

②

Each external input terminal can be changed its function by allotting the external input function No. of P07-P10 selected

with 7-segment respectively. (External input functions of the code P07-P10 are shown in Fig-2)

③

The following function is effective, when the external input function of PXX-"X" is allotted and the signal is input to the

external terminal of CnXX.

(Example) If CnS1 terminal is used for demand control (pulse input), allot the "1" of P07 and open J13, and if CnS2 terminal is

used for demand control (level input), allot the "1" of P08 and short J13.

④

J13: Switching of CnS1,S2 input method (CnS1, S2 only)

J13 shorted: Level input by CnS1, S2

J13 open : Pulse input by CnS1, S2

*1 "Setting" means;

Master : Set only the master unit. (No necessary to set the slave unit)

Master/Slave: Set both master/slave unit same.

External input terminal External input function allotment of 7-segment

Terminal Specication Factory setting Code Function No. Factory setting

CnS1 No voltage contact (DC12V) Shorted P07 "0"-"9" "0"

CnS2 No voltage contact (DC12V) Shorted P08 "0"-"9" "1"
CnG1 No voltage contact (DC12V) Open P09 "0"-"9" "2"
CnG2 No voltage contact (DC12V) Open P10 "0"-"9" "3"

Fig-1

The switch will continuously change the display indication to the next one in every 0.25 seconds when it is pressed for 0.75 seconds or longer.
If the Reset switch is pressed during an operation, the display indication returns to the one that was shown before the last Set switch operation.
Even if an indoor unit No. is changed in this mode, the registered indoor unit No. before address change mode is displayed when [I/U SELECTION

▼] is shown.

When “SET COMPLETE” is shown, indoor unit No.’s are registered.

Selecting an indoor unit
to be changed address

Setting a new indoor unit No.

2

3

Setting a new outdoor unit No.

Ending the session

4

5

④ Pressing the switch will change the display indication cyclically to show the unit No.’s
of the indoor units connected to the remote control and the unit No.’s of the outdoor units
connected with them.

⑤ Then the address No. of the indoor unit to be changed is determined and the screen switches to the
display “ SET I/U ADD.”

⑥ Set a new indoor unit No. with the switch.
A number indicated on the display will increase or decrease by 1 upon pressing the ▲ or ▼ switch
respectively.

⑦

After selecting an address, press the

SET

switch. Then the address No.of the indoor unit is determined.

⑧ The display will indicate the determined indoor address No. for 2 seconds and then switch to the
“ SET O/U ADD.” screen.
A default value shown on the display is the current address.

⑨ Set a new outdoor unit No. with the switch.
A number indicated on the display will increase or decrease by 1 upon pressing the ▲ or ▼ switch
respectively.

⑩ After selecting an address, press the SET switch.
Then the address of the indoor unit and outdoor unit are determined.

⑪ If you want to continue to change addresses, return to step ④.

⑫ If you want to end the session (and reflect new address settings)

In Step ⑩, press the ▼ switch to select “END ▲.”
If you have finished changing addresses, press the SET switch while “END ▲” is shown. While new
settings are being transmitted, “SET COMPLETE” will be indicated. Then the remote control display will
change to the normal state.

⑬ If you want to end the session (without reflecting new address settings)
Before you complete the present address setting session, press the “ON/OFF” switch.
Then the display is change to exit from this mode and switch the display to the normal state.
All address settings changed in the session will be aborted and not reflected.

[I/U002](2sec)

[I/U 002](2sec lighting)
⇔[SET O/U ADD.](1sec)
⇔[O/U01  ](Blink)

[O/U 00▲]
⇔[O/U 01  ]
⇔[O/U 02  ]
⇔ ・・・
⇔[O/U 31▼]

[I/U 002 O/U 02](2sec lighting)
→[SELECT](1sec lighting)
→[I/U SELECTION▼](lighting)

[Press the switch](1sec)
→[SET COMPLETE](2〜10sec

lighting)

[END▲]
→[SET COMPLETE](2〜10sec lighting)
→Normal state

[ON/OFF]
→Forced termination

[I/U 001 O/U 01▲」
⇔[I/U 002O/U 01  ]
⇔[I/U 003O/U 01  ]
⇔ ・・・
⇔[I/U 016 O/U 01▼」

[SET I/U ADD.](1sec)
→[I/U 001  ](Blink)

[I/U000▲]
⇔[I/U001  ]
⇔[I/U002  ]
⇔ ・・・
⇔[I/U127▼]

Turn on power to centralized control equipment after the addresses are determined.
Turning on power in wrong order may result in a failure to recognize addresses.

NOTICE

7 segment display indication in automatic address setting

Code Contents of a display

P30

P31

P32

P34

Code

Contents of a display

Items that are to be set by the customer

Communication protocol 0: Previous SL mode
     1: New SL mode

Polarity difinition 0: Network polarity not defined.

1: Network polarity defined.

AUX

During automatic address setting.
X: The number of indoor units recognized by the outdoor unit.

AUE

Indoor unit address setting is completed normally.

End

Polarity is defined. (Automatic address)
Completed normally.

Automatic address start

Input starting address Specify a starting indoor unit address in automatic address setting.

(The communication plotocol is displayed ; display only)

P33

Input number of connected indoor units  Specify the number of indoor units connected in the refrigerant system in automatic address setting.

7 segment display indication in automatic address setting.

*1 Valid/invalid is changed depending on outdoor temperatures.
*2 It is always Valid, regardless of outdoor temperature.
*3 According to the demand setting table.

“0” : External operation input

“1” : Demand input

“2” : Cooling / heating force input

“3” : Silent mode 1 *1

“4” : Spare

“5” : Outdoor fan snow control input

“6” : Test run external input 1 (SW5-1 equivalent)

“7” : Test run external input (SW5-2 equivalent)

“8” : Silent mode 2 *1

“9” : Demand input

“10” : AF periodic inspection display

“11” : AF error display

“12” : Building multi energy save control

Permitted

*3

Heating

Valid

Valid

Test run start

Cooling

Valid

*3

Valid

Valid

Valid

Prohibited

*3

Cooling

Invalid

Invalid

Normal

Heating

Invalid

*3

Invalid

Invalid

Invalid

By changing the allocation of external input function (P07-10) on the 7-segment, functions of external input terminal
may be selected. Inputting signals to external input terminals enable the following functions.

Demand

control

Function

assignment 1

Function

assignment 9

None (Normal)

1-step

2-step

3-step

Shorted

Open

Open

Shorted

Shorted

Shorted

Open

Open

*3 Demand setting table

Setting value for external input function assignment External input terminal shorted External input terminal open

Fig-2

'14 • KX-SM-202

Input: CnS1

Switching CnS1

input method:J13

CnS1: Switching operation
permission/prohibition mode

Shorted (Level input)

Shorted

Shorted

Open

Open

Operation prohibition mode

Operation permission mode

Operation permission mode

Operation prohibition mode

—

(NOP)

Switching operation permission/
Operation prohibition mode (Reversal)

Shorted (Level input)

Open (Pulse input)

Open (Pulse input)

-

33

-

(b) Demand control

(Note) Following explanation is based on using CnS2 terminal and setting function [P08]-[1] with 7-segment display.

However other terminals can be used with following function setting of 7-segment display

CnS1: [P07]-[1] CnG1: [P09]-[1] CnG2: [P10]-[1]

1) Demand control or normal control is switched with the connector (CnS2) and the jumper wire (J13) on the outdoor

control PCB after setting function [P08]-[1] (Factory setting) with 7-segment display.

J13: Switching of CnS2 input method

J13 shorted: Level input by CnS2

J13 open : Pulse input by CnS2

2) Demand control/Normal operation by the external input CnS2 to outdoor unit.

Note (1) Factory setting J13: Shorted, CnS2: Shorted (Short pin is connected)

3) The operation condition is displayed on the LCD of remote control and it is transferred to option centralized control.

①

J13 − Shorted

②

J13 - Open

5) CnS1 performs the following operation according to switching the jumper wire (J13) shorted or open. In case of

pulse input, the pulse width is 500ms or larger.

PUSH

CnS1 input OFF (Open)

Remote control operation

Remote control display

Air-conditioner operation/stop

PUSH PUSH PUSH

OFF

Center Remote

ON (Shorted)

Center

OFF

OFF (Open)

Air-conditioner ON OK

OFF ONON

OFF OFF ONON

Remote control operation

Remote control display

Air-conditioner operation/stop

Center Center Center

Remote

Remote

Air-conditioner ON OK

CnS1 input

OFF

OFF

ON

ON OFF OFFON

OFFON

PUSH PUSH PUSH PUSH PUSH

Input: CnS2

Switching CnS2

input method:J13

CnS2: Switching operation
permission/prohibition mode

Shorted (Level input)

Shorted

Shorted

Open

Open

Demand control

Normal operation

Normal control

Demand operation

—

(NOP)

Switching Demand control/
Normal operation (Reversal)

Shorted (Level input)

Open (Pulse input)

Open (Pulse input)

'14 • KX-SM-202

OFF ON OFF OFFON

3)

The operation condition is displayed on the LCD of remote control and it is transferred to option centralized control.

4) When the operation command from remote control is not accepted by this control, "Center" is displayed on the

LCD of remote control. (See item 5 mentioned next page.)

6)　 After changing mode from operation prohibition mode to permission mode, the indoor units operation status can be

select by 7-segment [P17] setting.

7-segment [P17] =0 → Keeping STOP
7-segment [P17] =1 → Automatically RUN

'14 • KX-SM-202

-

34

-

5)

4) Demand control

Demand ratio can be changed with the 7-segment "P04" on the outdoor control PCB.

P04 setting

Compressor

output (%)

080(Factory default)

80
060 60
040 40
000 0

6) CnS2 performs the following operation according to switching the jumper wire (J13) shorted or open.

In case of pulse input, the pulse width is 500ms or larger.

①

J13 − Shorted

②

J13 - Open

PUSH

CnS2 input

OFF OFF

ONON

Compressor

Compressor Demand

PUSH PUSH PUSH

Remote control operation

Remote control display

Air-conditioner operation/stop

Remote

ON (Shorted) ON (Open) ON (Shorted)

Demand control

NormalNormal

CnS2 input

Compressor

Compressor Demand

Remote control operation

Remote control display

Air-conditioner operation/stop

Remote

Demand control Demand control

OFFOFF

ONON

PUSH PUSH PUSH PUSH

(c) 3 step demand control

'14 • KX-SM-202

OFF OFF

ONON

Demand

OFF OFF

ONON

ONON

OFF OFF

Demand

This control has priority over the controls of 4-way valve safeguard, compressor protective start operation, defrost

operation, oil equalized operation, oil return operation, pump-down operation for replacement, Start/Stop pump-down

operation and check operation.

1) Starting condition

When the “Demand input 2” via the external input terminal of outdoor unit (master unit) has become valid.

2) Contents of control

The demand control is performed at the demand rate which has been set with [P14] and [P15] according to the de-

mand input or the demand input 2.

Demand control

Following is assigned to one of P07 - P10.

Demand rate

setting

Demand input

(Function assignment: 1)

Demand input 2

(Function assignment: 9)

None (Normal) Shorted Shorted ─

1st step demand Open Shorted P04

2nd step demand Open Open P14

3rd step demand Shorted Open P15

'14 • KX-SM-202

-

35

-

PUSH

Demand input 2

OFF OFF

ON

ON

PUSH PUSH PUSH

Remote control operation

Remote control display

Air-conditioner operation/stop

Remote

Demand control

NormalNormal

.;60

OFF OFF

ONON

Demand control

Demand control

demand demand demand demand demand demand

1st step 1st step 2nd step 3rd step 2nd step 1st step

Normal Normal

Demand input
(CnS1,S2,G1,G2)

(CnS1,S2,G1,G2)

Valid(Open)

Invalid(Shorted)

Valid(Open)

Invalid(Shorted)

NormalNormal

3) Ending condition

When the starting conditions have been lost.

(d) Demand control from indoor unit

1) Starting condition

①

When a demand ratio (“80%”, “60%”, “40%” or “0%”) has been transmitted from an indoor unit of “Peak-cut

timer” function.

②

Normal demand of Item (b) is not activated.

③

This control is performed on the RC-EX1A remote control.

2) Contents of control

①

Compressor’s upper limit speed is restricted according to the demand restriction rate.

②

The demand ratio controlled by the restriction rate which is transmitted from an indoor unit.

③

If the demand control rate signals are received from two or more indoor units, the control takes the lowest rate.

④ 

When the demand rate is other than 0%, this control is superseded by the controls of 4-way valve safeguard, de-

frost operation, oil return operation, oil equalized operation, pump-down operation for replacement, Start/Stop

pump-down operation and check operation.

3) Ending condition

When the starting conditions have been lost.

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(2) Silent mode control

(Note) With CnG2 terminal and 7-segment display [P10]-[3] for silent mode 1(Factory default) or with CnG2 terminal and 7-segment display [P10]-[8]

 for silent mode 2 (Setting on site) It is also avilable to use other terminals as follows.

  CnS2: [P08]-[3] or -[8] CnS1: [P07]-[3] or -[8] CnG1: [P09]-[3] or -[8]

(a) Silent mode is commanded either from the indoor unit (remore control setting) or from the master outdoor unit (CnG2).

(b) When the "Silent mode start" signals is received from one of indoor units, it enters the silent mode operation.

(c) When CnG2 of master unit is shorted after setting function [P10]-[3] (Silent mode 1) or [P10]-[8] (Silent mode 2) with

7-segment display, it enters the silent mode operation. (If the signal is input to the slave unit, it is invalid)

(Note) Silent mode 1 and 2 can not be set at same time

(Note) In case of external input of silent mode 2, following temperature conditions are disregarded.

(d) When the "Silent mode start" signal from indoor unit and the "Silent mode" signal from outdoor unit are received, it enters

the silent mode operation under "or"condition.

(e) When silent mode signals from all indoor units become "Silent

mode end" and when silent mode signal input to CnG2 on

outdoor unit becomes open, the silent mode operation is reset.

(f) The operation of silent mode 1 is effective within the following temperature range.

• Cooling • Heating

Outdoor air temperature Outdoor air temperature

(i) Silent mode 0,1 : Effect on field A,B

(g)

Silent mode setting
Silent mode setting can be changed with 7-segment “P05” on the outdoor control PCB.

(ii) Silent mode 2,3 : Effect on field B

Valid (Field B)

Valid (Field A)

Invalid

29 31°C27

Valid (Field A)

Valid (Field B)

Invalid

2 4 6°C

P05 setting

000 (Factry default)

001

002

003

Silent mode setting

Silent mode setting 0

Silent mode setting 1

Silent mode setting 2

Silent mode setting 3

(h) Sound level (Reference data)

Model

SPL

Sound

pressure level

for cooling

SPL

Sound

pressure level

for heating

SPL
Silent
mode

setting 0

SPL

Silent

mode

setting 1

SPL
Silent
mode

setting 2

SPL

Silent

mode

setting 3

PWL

Cooling

PWL

Heating

(dB(A)) (dB(A)) (dB(A)) (dB(A)) (dB(A)) (dB(A)) (dB(A)) (dB(A))

FDC(S)280KXZE1

55 57 55 51 47 43 75 76

FDC(S)335KXZE1

61 58 61 57 53 49 81 78

FDC(S)400KXZE1

60 62 60 56 52 48 81 83

FDC(S)450KXZE1

61 62 61 57 53 49 81 83

FDC(S)475KXZE1

61 62 61 57 53 49 81 83

FDC(S)500KXZE1

61 62 61 57 53 49 81 83

FDC(S)560KXZE1

64 66 64 60 56 52 84 86

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(3) Outdoor fan snow protection control (Master unit/Slave unit)

(Note) Following explanation is based on setting function with 7-segment display [P02].

However the following terminals and 7-segment function settings are available to use.

CnS1: [P07]-[5] CnS2: [P08]-[5] CnG1: [P09]-[5] CnG2: [P10]-[5]

(a) The setting of this control should be done not only on the master unit but also on the slave unit, because the fans of master

unit and the slave unit are controlled independently.

(b) The control is enabled /disabled by selecting [0] or [1] displayed at 7-segment LED of master/slave units.

(c) Operation method of outdoor fan snow protection control

(i) Set the code [P02] on 7-segment display

(ii) “0” or “1” is displayed at the data display area of 7-segment LED.

“0”: Outdoor fan snow protection control is disabled (Factory setting)

“1”: Outdoor fan snow protection control is enabled

(iii) Press SW7 (Data write/delete) for 3 seconds continuously

(iv) “0” or “1” blinks every 0.5 second at the data display area of 7-segment LED.

(v) Press SW8 (one digit) to toggle the display between “0” and “1”.

(vi) If SW7 is pressed for 3 seconds continuously while “0” and “1” are blinking, “0” or “1” at the data display area of

7-segment LED stops blinking.

With this operation, the enabled/disabled setting of outdoor fan snow protection control is saved in the memory of

EEPROM, and henceforth the outdoor fan is controlled according to the contents of memory.

(vii) Contents of outdoor fan snow protection control are retained even if the power is turned off and backed on again.

(d) Contents of outdoor fan snow protection control

(i) At the status of all stop or emergency stop, if the outdoor air temperature drops 3°C or lower, all of outdoor fans are

operated at the maximum speed (4th speed) once every 10 minutes.

(ii) The outdoor fan runs for 30 minutes

(iii) During this snow protection control, the magnetic

contactor 52C1 of the compressor is ON

(4) Outdoor operation mode

On the standard models of 2 pipe system, the outdoor operation mode of Stop/Cooling/Heating is selected based on the informa-

tion of indoor units, and then respective controls are performed.

<Contents of control>

(a) Determination of outdoor operation mode

Operation mode of outdoor unit is determined based on respective signals of Operation/Stop and Cooling/Heating.

(b) Type of outdoor operation mode

1) Outdoor operation mode - Stop

2) Outdoor operation mode - Cooling

3) Outdoor operation mode - Heating

(c) Priority in operation mode selection.

1) First priority is given to the forced cooling/heating operation.

2) Second priority is given as follows

Priority in the operation mode selection can be changed using the 7-segment setting [P01].

3 5

Outdoor air temperature (°C)

Fan OFF

Fan ON

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・

First unit’s operation mode: Operation mode of the indoor unit which is operated rst time after stop of the outdoor

unit operation mode

・

Last unit’s operation mode: Operation mode of the indoor unit which is operated at the last time

・

Priority of master unit’s setting operation mode: Operation mode of indoor unit of which the address No. is small-

est (Master indoor unit). When the master indoor unit is turned off,

it become valid the rst push priority on other indoor units’ remote

controls.

・

Priority of required major operation mode: Operation mode of which the total capacity of operating indoor units is

larger. There is no renewed judgment for 10 minutes after a change on the

operation mode.

The judgment, however, is renewed in following cases.

-

At the stop

-

When the P01 setting is changed.

3) In the event that agreement of operation mode is lost between indoor units and outdoor units by selecting the rst or

second priority after determining the operation mode, it is changed forcibly to the “Fan” mode. The operation mode

LCD ickers to warn the “Mode unmatch”

4) Example of operation mode selection

<First unit’s operation mode>

①

If both of indoor units 0 and 1 have the same operation mode, it operates with the mode.

②

Cooling does not match on indoor units 0 and 1 (Priority is given to previous operation.)

P01 setting Mode

0 (Factory default)

First unit’s operation mode

1 Last unit’s operation mode

2

Priority of master unit’s setting operation mode

3 Priority of required major operation mode

Indoor unit 0 Stop Cooling

ON

Cooling

Indoor unit 1 Stop Cooling

ON

Indoor unit 0 Stop Cooling Cooling

ON

Indoor unit 1 Stop Heating “Invalid operation” lamp ickers. Fan

ON

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Indoor unit 0 Stop Cooling Heating “Invalid operation” lamp ickers. Fan

ON ON

Indoor unit 1 Stop Cooling Cooling

ON

③

When it is changed from same mode to unmatch.

④

Operation mode is prepared for change in the fan mode.

<Last unit’s operation mode>

①

If the indoor unit 1 of which operation mode is different has joined in when the indoor units 0 is operating.

<Priority of required major operation mode>

5) Reset of unmatched condition (Cooling/heating unmatched)

When unmatch occurs among indoor units, it can be reset by either one of followings.

①

If the operation mode of outdoor unit is matched with that of indoor unit.

②

If the operation mode is changed to “Fan” or “Stop” on the indoor units on which Cooling/heating is unmatched.

Indoor unit 0 Stop Fan Fan

ON

Indoor unit 1 Stop Heating Heating

ON

Indoor unit 0 Stop Cooling “Invalid operation” lamp ickers. Fan

ON

Indoor unit 1 Stop Heating Heating

ON

Outdoor operation mode

Indoor unit P90

(Cooling)

Indoor unit P80

(Heating)

Indoor unit P80

(Heating)

ON

Cooling

Heating

OFF

ON

Unmatched ⇒ Fan mode

Unmatched ⇒ Fan mode

Thermostat ON

ON

OFF

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(d) Forced cooling /heating operation (Master unit)

(Note) Following explanation is based on using CnG1 terminal and setting function [P09]-[2] with 7-segment display.

However other terminals can be used with following function setting of 7-segment display.

CnS1: [P07]-[2] CnS2: [P08]-[2] CnG2:

[P10]-[2]

1) When SW3-7 on the outdoor control PCB is turned ON after setting function [P09]-[2] with 7-segment display, if

CnG1 is shorted, forced heating operation is performed, but if CnG1 is open, forced cooling operation is performed.

2) If the different mode from the forced operation mode is commanded from indoor unit, the "mode unmatch" message

is displayed on the LCD of remote control and the operation is entered in FAN mode.

3) With the forced mode from indoor unit, if a different operation mode is commanded, following operations take place

based on the forced cooling/heating operation set with the 7-segment [P18].

P18 = 0: The operation mode unmatch is displayed on the remote control, etc., and it is changed to the fan

operation.

P18 = 1: It is operated with the forced cooling/heating operation mode.

Setting temperature for cooling … 28

℃

Setting temperature for heating … 20

℃

(5) Emergency stop control

When one of indoor units receives the emergency stop signal through CnT terminal on the indoor control PCB from the device

like as refrigerant leakage detector and that information is transmitted to the outdoor unit, the outdoor unit stops operation and

emergency stop error message transmitted to all indoor units running.

It is able to make the emergency stop function effective by remote control indoor function setting.

(a) When the outdoor unit receives the “Emergency stop” command from the indoor unit, it makes all stop by error.

(b) And the “Emergency stop” command is transmitted to all indoor units and error code “E63” is displayed.

(c) When the outdoor unit receives the “Emergency stop reset” command from the indoor unit, the “Emergency stop reset”

command is transmitted to all indoor units.

SW3-7

ON CnG1

Open Operation in cooling only

Shorted Operation in heating only

OFF Normal operation

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(6) Operation and error signal output (Master unit/Slave unit)

This is the function to retrieve and display the operation and error information on the outdoor unit as a batch.. Although

indoor units also have the function to retrieve the operation and error information, this function is designed to retrieve the whole

information of each refrigeration system connected to the outdoor unit.

(a) The terminals for the operation and error outputs at the outdoor unit side are provided on the outdoor control PCB.

(b) Diagram of output relay operations

(c) The error output relay (52XE) is turned ON when the error stop occurs, and is turned OFF when the error reset is done

from remote control by pressing "Check" and "Reset" button simultaneously after recovery from the error (Remote con-

trol reset case ②).

Before recovery from the error, if the error reset is done from remote control, 52XE is not turned OFF, but it will be turned

OFF automatically after the error is recovered subsequently (Remote control reset case ①).

(d) If at least one of connected indoor units is operating, the operation output relay (52XR) is turned ON. (Operation means

the state that remote control is turned ON, in which the fan operation and the thermostat OFF is included, but the error

stop is excluded.)

(e) Output relay (52XR, 52XE) of DC12V should be prepared in the eld. The maximum load of relay is LY2F (Omron).

(f) The output connectors (CnH, CnY) to be connected to the relays for operation output (52XR) and for error output (52XE)

is mounted on the outdoor control PCB.

(g) If CPU goes out of control, this function becomes disable.

(h) When the automatic backup operation is effective, there is no error display for any error on the compressor stopping by

detecting its anomaly.

(7) External output

This function is used in order to operate the external option devices in conjunction with relay output of the respective opera-

tional information from outdoor unit.

However, since these models do not have dedicated output, it makes switchable by using the existing 52R relay in order to com

-

ply with various usages.

This control is done for master unit and slave unit independently.

[External output function]

External output function of CnH can be switched by changing of [P06] of 7-segment display from

"0" to "5" as mentioned below.

0: Operation output [Factory default]

1: Error output

·It is turned on at anomalous stop, and turned OFF when "CHECK" and "RESET" buttons on remote control are pressed si

-

multaneously after recovering from the anomaly. Even if "CHECK" and "RESET" buttons are pressed before recovering from

the anomaly, it is not turned OFF. But when recovering from the anomaly later, it is automatically turned OFF.

OFF

OFF

ON

ON

Error output 52XE

Presence of error

Outdoor LED for inspection

Normal Normal

Error

Error

Case ②

Case ①

Remote

control reset

Case ①

Remote

control reset

Case ②

Dip switch

Reset

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2: Compressor ON output

·It is turned ON, when the compressor is ON

3: Fan ON output

·It is turned ON, when the outdoor fan No.1 speed command > 0, or the outdoor fan No.2 speed command > 0.

4: Oil return operation output

·It is turned ON at oil return operation in cooling or at oil return operation in heating, or at defrost operation in heating.

5: When HP is relatively high

·Signal is output in order to operate a sprinkler system for cooling down the outdoor heat exchanger.

It is turned ON, when high pressure > 3.3MPa in cooling mode

If once starting operation of sprinkler system, it shall be kept operation for 30sec at least.

(8) Pump down control for replacement (Master unit/slave unit)

This control is for recovering refrigerant to outdoor unit quickly in case of replacement or relocation of the outdoor unit.

(a) This control is performed from the master unit side. It cannot be controlled from the slave unit side. If this control is at

-

tempted from the slave unit side, the following codes are displayed on the 7-segment LED of the slave unit.

Note (1) The display returns to normal if the pump-down control switch is reset.

(b) Pump down operation can be performed with the operation of 3 dip switches SW5-1(Test run switch), SW5-2 (Test run

operation mode) and SW5-3 (Pump down switch)

(c) Pump down procedure

1) Shut the liquid side service valve on the outdoor units

2) Turn SW5-2 (test run operation mode) ON (cooling)

3) Turn SW5-3 (pump down switch) ON

4) Turn SW5-1 (test run switch) ON

(d) End condition

If any of the following conditions is satised, this control ends.

(i) When the low pressure (LP) is preset value or less, this control ends normally, and indicates followings

①

Red LED: Keeps lighting

②

Green LED: Keeps ashing

③

7-segment display: PdE

④

Remote control: Stop

(ii) Anomalous all stop by the error detection control

(iii) If the cumulative compressor operation time under pump down control is 15minutes (End control because time is

up), this control ends and indicates followings

①

Red LED: Stays OFF

②

Green LED: Keeps ashing

③

7-segment display: No display

④

Remote control: Stop

(iv) When any of setting switch (SW5-1, SW5-2, SW5-3) is turned OFF during pump down control.

(Note) Even if only SW5-3 is turned OFF, it is not recognized as the cooling test run mode and it stops.

Code display area Data display area Contents of invalid operation

OPE 10 Setting from the slave unit is invalid

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(9) Pump-down operation by external input

If an error stop is raised by an external input by refrigerant leaking alarm unit, the pump-down operation is performed at the

outdoor unit side in order to prevent the refrigerant from leaking.

They are local arrangements.

①

Refrigerant leaking alarm unit

②

Valve to shut liquid pipe

③

Valve to shut gas pipe

Valves of

②and③shouldbeselectedwhatthepressurelossofrefrigerantpipingdoesn’tincrease.

(a) Status 1: Pump-down operation

(i) Starting condition

①

When the external input function is assigned to “0: External operation input” and the external input terminal is

open (by refrigerant leaking alarm unit).

②

If the pump-down control is valid when the error stop is raised by the setting on 7-segment. ([P19] = “1”)

(ii) Contents of control

①

ON is output on CnY, and the liquid service valve is shut down if it is connected on CnY.

②

The pump-down operation for replacement is performed.

(iii) Ending condition

①

When starting conditions are lost.

②

When the pump-down operation has ended.

(b) Status 2: Emergency stop operation

(i) Starting condition

①

When the pump-down operation has ended in the status 1.

(ii) Contents of control

①

ON is output to CnZ1, and the gas service valve is shut down if it is connected on CnZ1.

②

Operation stops with the error full stop. ([E63] is displayed.)

(iii) Ending tion

①

When starting conditions for the status 1 are lost.

②

State of error continues for 3 minutes after the error full stop. It cannot be reset in this condition from the remote

control. If the starting conditions for Status 1 are not yet established later, this can be reset by the remote control

inspection reset.

6. New funcons

Pump down external input

Emergency call => External operaon input : Opened

Alarm unit

Gas leakage

Pump down

operaon

Activate by 7SEG:[P19]=“1”

E63

<==

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●Sample of system configuration

Alarm unit

Valve to shut
gas pipe

Valve to shut
liquid pipe

3

Output for valve to shut liquid pipe :CNY
Wiring part no. PCZ006A051A
Output for valve to shut gas pipe : CNZ1
Wiring part no. PCZ006A051B

Need to use DC12V relay (OMRON
LY2F equivalent) for output the
CNY,CNZ1
Keep less than 150mA at maximum
with all CNY, CNZ1, CNH

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(10) VTCC : Variable Temperature and capacity control (VRF inverter Multi-system energy save control)

On the multi-system, target pressures are set uniformly so that indoor units operate with a constant capacity and repeat the ON/

OFF control with which thermostats are turned OFF when temperatures become near the setting temperature.

Owing to the tuning of target high/low pressure near the setting temperature, it becomes possible to perform the high efciency

operation near the setting temperature.

For this reason, duration of time for highly efcient operation is increased by providing the compressor upper limit speed ac-

cording to the thermostat ON capacity.

・

Thermostat ON capacity … Total capacity of indoor units which are operating with the thermostat ON

(a) Correction of target high/low pressure

(i) Starting condition (either of

①or②

)

①

When the external input function assignment [P07] - [P10]: Multi-system energy save control = Valid

②

When 7-segment [P69] (Multi-system energy save control I) = ON, if the external input function assignment [P07]

- [P10] is not assigned this control.

(ii) Contents of control

①

During the outdoor unit operation mode at cooling

・

Indoor load more than 50% → Corrected to the target cooling low pressure lower.

・

Indoor load less than 50% → Corrected to the target cooling low pressure higher.

②

During the outdoor unit operation mode at heating

・

Indoor load more than 50% → Corrected to the target heating high pressure higher.

・

Indoor load less than 50% → Corrected to the target heating high pressure lower.

(Total capacity of indoor units of which load is high)

(Note) Indoor load condition (%) =

Total capacity of indoor units with the thermostat ON

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(iii) Ending condition

①

When the starting conditions are lost.

(b) Compressor upper limit speed restriction for each operation capacity

(i) Starting condition (either of

①or②

)

①

When the external input assignment [P07] – [P10]: Multi-system energy save operation = Valid and 7-segment

[P16] (Multi-system energy save control II) = 1 or 2 or 3

Factory default: 0 (OFF)/1 (Setting 1), 2 (Setting 2), 3 (Setting 3)

②

7-segment [P16] = 1 or 2 or 3, if the external input function assignment [P07] – [P10] is not assigned this control.

(ii) Contents of control

①

Compressor upper limit speed is the value obtained by multiplying with the upper limit speed restriction rate ac

-

cording to the thermostat ON capacity.

②

The upper limit restriction rate is divided to the following 3 steps according to each setting of [P16] as follows.

③

Following controls supersede this control.

・

4-way valve safeguard

・

Defrost operation

・

Oil return operation

・

Oil equalized operation

・

Pump-down operation for replacement

・

Start/Stop pump-down operation

(iii) Ending condition

①

When the starting conditions are lost.

Upper limit speed restriction rate

Upper limit Fk

(Normal)

Setting 1: 60%

Thermostat ON capacity

Setting 2:40%

Setting 3:20%

0 100%

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(C) Data output

(1) 7-segment display and operation data retention

(a) 7-segment display

Operation information is displayed for checking various operation data during test run and for helping malfunction diag

-

nosis at servicing. Input data to microcomputer, contents of outdoor unit control, registration information of indoor units

and etc. are mainly displayed on the 7-segment LED.

(i) Operation information display

1) Each item is displayed at the 7-segment LED with 6-digit on outdoor control PCB

2) Left 3 digits are for code display and right 3 digits are for data display

3) The code No. of each item is selected by pressing SW9 for the order of 10 and SW8 for the order of 1.

4) If the code No. is set at “C99”, the data of the code No. from “C00” to “C29” is displayed cyclically.

Code No. at factory setting is “C99”

5) If the code No. is set at other than “C99”, the data of selected code No. is kept on displaying.

6) The code No. “C77” is for resetting

The contents of retained operation data (the data for a period of 30 minutes prior to error stop) can be erased by

setting the code No. at “C77”.

The resetting method is to select the code “C77” rst. (If any error data is retained, “dEL” is displayed on the

data display area.)

And then when press SW7 for 3 seconds, the retained error data can be erased. However the data of the code No.

“C54” and “C55” (compressor cumulative operation time) are not erased.

When the data is erased, “---” is displayed on the data display area of 7-segment LED. And this is displayed as

well when no error data is retained.

7) If SW8 (order of 1) is pressed, it displays in the order of 0 ⇒ 1 ⇒ 2 …… 9 ⇒ 0.

8) If SW9 (order of 10) is pressed, it jumps to the leading code of each order of 10

(Example) If SW9 is pressed at the code No. “C07” displayed, it jumps to the code No. “C10”.

9) The data of code No. “C54” and “C55” can be erased independently

The compressor cumulative operation time corresponding to the code No. selected can be erased (reset). (For

resetting of the compressor cumulative operation time after replacement of compressor)

The resetting method is to select the code “C54” or “C55” rst. (the compressor cumulative operation time

corresponding to the code No. is displayed on the data display area of 7-segment LED.)

And then when press SW7 for 3 seconds, the retained data can be erased. However the data of the retained operation

data (the data for 30 minutes before error stop) are not erased.

(ii) Individual denition of display contents

1) Code No. “C17”: Subcooling degree at cooling mode

[Subcooling degree at cooling mode] =

[High pressure saturated temperature detected with high pressure sensor (PHS)]

-[ Subcooling coil temperature detected with subcooling temperature thermistor (Tho-SC)]

The calculated result is displayed after rounding to one decimal place. Or if the calculated result is a negative

value, “0.0” is displayed.

During heating mode this data might be unreliable as subcooling degree, but the result is displayed as it is.

2) Code No. “C18”: Suction superheat degree

[Suction superheat degree] =

[Suction pipe temperature detected with suction pipe temperature thermistor (Tho-S)]

-[Low pressure saturated temperature detected with low pressure sensor (PLS)]

The calculated result is displayed after rounding to one decimal place. Or if the calculated result is a negative

value, “0.0” is displayed.

3) Code No. “C19”: Superheat degree of subcooling coil

[Superheat degree of subcooling coil] =

[Subcooling coil temperature detected with subcooling coil temperature thermistor (Tho-H)]

-[Low pressure saturated temperature detected with low pressure sensor (PLS)]

The calculated result is displayed after rounding to one decimal place. Or if the calculated result is a negative

value, “0.0” is displayed.

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-

(iii) Error code displayed at error occurrence can be reset with the dip switch SW3-1 ON.

(iv) Discharge pressure saturated temperature and suction pressure saturated temperature are displayed after rounding to

unit, if it is -10.0°C or lower. (Because the 7-segment display range is 3-digit)

(v) Priority of display

1) [EXX] > [CHX] > [PCLX] > [PoE] > [PoS] > [OPE] > [CXX]

Special display

[EXX]: Error code [CHX]: Check mode

[PoE], [PoS]: Pump down operation [OPE]: Outdoor unit setting

2) If the state of 1) is reset, it is automatically switched to [CXX] (Automatic data display mode)

3) When pressing SW8 or SW9 under the state of 1), it switched to [CXX]

However the button input is not done for 10 seconds after switching to [CXX], the display is changed to the spe

-

cial display according to the priority of the state 1)

When Special
display occurs

When Special
display reset

Special display

[CXX]

Button operation

Button operation

No operation for 10 seconds*

* If the special display is reset in the meanwhile, it remains [CXX].

Automatic feeding

[C99]

'14 • KX-SM-202

-

49

-

(b) 7-Segment display

Code

No.

RemarksContents of display

Data display

range

Minimum

unit

C00

C01

C02

C03

C04

C05

C06

C07

C08

C10

C11

C12

C13

C14

C15

C16

C18

C19

C20

C21

C22

C23

C24

C25

C26

0~130

0~130

L,-20~43

L,-25~73

L,-25~73

L,-25~73

L,-25~73

L,31~136

L,31~136

L,5~90

L,5~90

L,31~136

L,31~136

L,18~73

L,-25~73

L,-25~73

0~70

0~70

0~500

0~500

0~500

0~1500

0~1500

0~5.00

0~2.00

1Hz

1Hz

1°C

1°C

1°C

1°C

1°C

1°C

1°C

1°C

1°C

1°C

1°C

1°C

1°C

1°C

1A

1A

1 Pulse

1 Pulse

1 Pulse

10 min

10 min

0.01MPa

0.01MPa

CM2 operating frequency

Tho-A Outdoor air temp.

Tho-R1 Heat exchanger temp. 1 (Exit. Front)

Tho-R2 Heat exchanger temp. 2 (Exit. Rear)

Tho-R3 Heat exchanger temp. 3

(Entrance. Front)

Tho-R4 Heat exchanger temp. 4

(Entrance. Rear)

Tho-D1 Discharge pipe temp. (CM1)

Tho-D2 Discharge pipe temp. (CM2)

Tho-C1 Under-dome temp. (CM1)

Tho-C2 Under-dome temp. (CM2)

Tho-P1 Power transistor temp. (CM1)

Tho-P2 Power transistor temp. (CM2)

Tho-SC Sub-cooling coil temp.1

Tho-SC Sub-cooling coil temp.2

Tho-S Suction pipe temp.

CT1 Current (CM1)

CT2 Current (CM2)

EEVH1 Heating expansion valve opening angle

EEVH2 Heating expansion valve opening angle

Opening angle of EEVSC overcooling coil
expansion valve

FM01 Number of rotations

FM02 Number of rotations

PSL Low pressure sensor

−−Ð

CM1 operating frequency

Unusual code
Pump down
Check mode
Outdoor unit setup, piping cleaning

E??
PoE, PoS
CH?, PCL?
oPE??

PSH High pressure sensor

-1

-1

C30 0,1

63H1-1
63H1-2
(63H1-R)

−

Order of 100 : 63H1-1, 2
Order of 10 : 63H1-R

(0: Close, 1: Open)

'14 • KX-SM-202

-

50

-

Code

No.

RemarksContents of display

Data display

range

Minimum

unit

C31

C32

C33

C34

C35

C36

C37

C38

C39

C40

C41

C42

C43

C44

C45

C46

C47

C48

C49

C50

C51

C52

C53

C54

C55

C56

C57

0,1

0,1

0,1

0,1

0,1

0,1

0,1

0~50

0.00~2.00

1.60~4.15

0~999

0~140

−

−

−

−

−

−

−

1Hz

CH2
20S
(20SL)

FMC1,2

SV1
SV2(20UF)
(SV3)

(SV4)
SV6
SV7

Cooling operation subcooling

Super heat

Super heat of subcooling coil

Tho-C1 Super heat

Target cooling low pressure

Target Fk

Inverter 1 operating frequency command

Order of 100 : (SV4)
Order of 10 : SV6
Order of 1 : SV7 (0: Close, 1: open)

Order of 100 :
Order of 10 :
Order of 1 :

Minimum unit 1°C at -10°C or lower

Order of 100 : SV1
Order of 10 : SV2(20UF)
Order of 1 : (SV3) (0: Close, 1: Open)

Order of 100 : FMC1,2
Order of 10 : Spare
Order of 1 : Spare (0: Close, 1: Open)

Order of 100 : 52C1
Order of 10 : 52C2
Order of 1 : CH1

(0: Close, 1: Open)

CNS1
CNS2
CNG1

CNG2
SV8
SV10

52C1
52C2
CH1

0,1

0,1

Order of 100 : CNS1
Order of 10 : CNS2
Order of 1 : CNG1 (0: Close, 1: Open)

−

−

Order of 100 : CNG1
Order of 10 : SV8
Order of 1 : SV10 (0: Close, 1: Open)

(0: Close, 1: Open)

Order of 100 : CH2
Order of 10 : 20S
Order of 1 : (20SL)

SV11
(SV13)

Order of 100 : SV11
Order of 10 : Spare
Order of 1 : (SV13) (0: Close, 1: Open)

CNZ1
CNH
CNY

CNZ1(External output)
CNH(Operation output)
CNY(Error output) (0: Close, 1: Open)

Number of connected indoor unit

0~80

1

Capacity of connected indoor unit

0~999

1

Number of operation indoor unit

0~80

Required Fk total

0~999

1Hz

Compressor cumulative operating time (CM1)

0~655

100h

Compressor cumulative operating time (CM2)

0~655

100h

Discharge pressure saturation temperature

-50~70

0.1°C

Suction pressure saturation temperature

-50~30

0.1°C

Minimum unit 1°C at -10°C or lower

Tho-SC1 saturated pressure

-0.68~4.15 0.01MPa

0~50

1deg

0~50

1deg

0~20

1deg

SHS

0~50

0.1deg

Tho-C2 Super heat

0.1deg

0.01MPa

Target heating high pressure

0.01MPa

1rps

C58 0~140

Inverter 2 operating frequency command

1rps

'14 • KX-SM-202

-

51

-

Code

No.

Remarks

See table on P.54

See table on P.53

Only displaying

Displays No. of the protection control of which effect is the strongest
among those occurred from the start of operation after the power on.

Displays No. of the protection control of which effect is stronger thirdly
among those occurred from the start of operation after the power on.

Displays No. of the error detection of which effect is the strongest among
those occurred from the start of operation after the power on.

Displays No. of the error detection of which effect is stronger secondly
among those occurred from the start of operation after the power on.

Displays No. of the error detection of which effect is stronger thirdly
among those occurred from the start of operation after the power on.

Displays No. of the protection control of which effect is stronger secondly
among those occurred from the start of operation after the power on.

Contents of display

Data display

range

Minimum

unit

C59

C60

C61

C65

C66

C67

C68

C69

C70

C71

C72

C73

C74

C75

C80

C81

C82

C83

C84

C85

C86

C87

C88

C89

C90

C91

C92

0~999

0~100

0~127

0~127

0~127

0~255

0~127

0~127

10min

1%

1

1h

1

FMo1 operating revolution command

Control status

Protection control status

Compressor stop causes

Time elapsed after compressor stop cause

Protection control causes 1

Compressor error causes 1

Counter · Anomalous FMo1

Counter · Anomalous FMo2

Counter ·

Indoor-outdoor communications error

-1

FMo2 operating revolution command

0~999

10min

-1

Demand ratio

Outdoor operating mode pattern

0~127

1

1

1

Protection control causes 2

1

Protection control causes 3

0~127

1

0~127

1

Compressor error causes 2

0~127

1

Compressor error causes 3

0~127

1

Counter · Current cut (CM1)

0~255

0~255

1

1

EEPROM memory. Resettable.

Counter · Current cut (CM2)

Counter · Power transistor overheat (CM1)

Counter · Power transistor overheat (CM2)

Counter · Compressor startup failure (CM1)

Counter · Compressor startup failure (CM2)

Counter · Anomalous compressor by loss of
synchronism (CM1)

Counter · Anomalous compressor by loss of
synchronism (CM2)

Counter · Communication error between inverter
PCB and outdoor control (CM1)

Counter · Communication error between inverter
PCB and outdoor control (CM2)

0~255

0~255

0~255

0~255

0~255

0~255

0~255

0~255

0~255

0~255

0~255

1

1

1

1

1

1

1

1

1

1

＿

EEPROM memory. Resettable.

EEPROM memory. Resettable.

EEPROM memory. Resettable.

EEPROM memory. Resettable.

EEPROM memory. Resettable.

EEPROM memory. Resettable.

EEPROM memory. Resettable.

EEPROM memory. Resettable.

EEPROM memory. Resettable.

EEPROM memory. Resettable.

EEPROM memory. Resettable.

EEPROM memory. Resettable.

C93

0~255

—

Counter · CPU reset

'14 • KX-SM-202

-

52

-

Code

No.

RemarksContents of display

Data display

range

Minimum

unit

C94

C98

P01

P02

P03

P04

P05

P06

P14

P15

P16

0~80

0.00~9.99

0~12

0~12

0~12

0~12

0.01

—

1

—

30

—

1

1

1

1

1

1

Switching to operation priority

Outdoor fan snow protection control

Outdoor fan snow protection control ON time
setting

Silent mode setting

CNZ1 function assignment

CNS1 function assignment

CNS2 function assignment

CNG1 function assignment

CNG2 function assignment

Changes to 10, 30, 60, 90 … 600.

Factory setting: 0 (External operation input)

Factory setting: 1 (Demand input)

Factory setting: 2 (Forced cooling/heating input)

Factory setting: 3 (Silent mode input)

0: (Factory default)

0, 1

0: (Factory default)

0, 1

0: (Factory default)

0, 1

0: (Factory default)

0, 1

0: (Factory default)

0, 1

0: (Factory default)

0, 1, 2, 3

0: (Factory default)

0, 1, 2, 3

Program sub-version

Program POL version

C97

C99

Many steps demand setting (1st step demand)

Auto send display

Auto back up capable time

1h

0~991

—

—

0 : Invalid
1 : Valid

30: (Factory default)

10,30~600(sec)

080: (Factory default)

000,040,060,080

080: (Factory default)

000,040,060,080

080: (Factory default)

000,040,060,080

0: (Factory default)

0 ~ 3

0: (Factory default)

0 ~ 9

P07

P08

P09

P10

Many steps demand setting. (2nd step demand)

Many steps demand setting. (3nd step demand)

Multi-system energy save control II

1

—

—

P17

P18

P19

P30

P31

P32

P33

P34

0, 1

—

—

1

1

1

—

Superlink communication status

Start automatic address setting

Input stating indoor address

Input the number of connected indoor units

Polarity definition

<New superlink setting>

0: Current Superlink
1: New Superlink

0: Automatic address setting standby
1: Automatic address setting start

0: Network polarity not defined
1: Network polarity defined

0: (Factory default)

0, 1

0: (Factory default)

1~127

0: (Factory default)

1~24(*)

Specify the starting indoor address connected in one refrigerant system
for automatic address setting.

Specify the number of indoor units connected in one refrigerant system
for automatic address setting.
(*) Maximum connectable number of indoor units for each outdoor unit

After changing mode from operation prohibition
mode

Mode unmatched indoor unit setting in forced mode

Pump-down operation by external input

1

1

1

P69

Multi-system energy save control I

'14 • KX-SM-202

-

53

-

[C67] Protection control status

<Definition of signal>

Shows the status of protection control in operation currently.

If two or more controls among the following protection controls are established simultaneously, No. of the control of which number

is larger is displayed.

Protection control status Number

Ordinary control

No operation of protective control 0

Protection control

During HP protection 1

Spare 2

During LP protection 3

During discharge temperature 4

During specic pressure protection 5

During under-dome temperature protection 6

During current safe protection 7

During power transistor temperature protection 8

Code

No.

RemarksContents of display

Data display

range

Minimum

unit

AUX

AUE

A01

A02

A03

A04

Auto address setting on

Indoor unit address No. assi

gnment normal

ending

Indoor unit address No. assignment error 1

Indoor unit address No. assignment error 2

Indoor unit address No. assignment error 3

Superlink setting error

'14 • KX-SM-202

-

54

-

[C68] Compressor stop causes

<Definition of signal>

Shows the latest compressor stop cause counted from right now.

(Excluding the ordinary stop, etc.)

Output of the No. is retained till next compressor stop cause occurs.

Compressor stop causes Number

No history

0

Sensor wire breakage

Tho-A 1

Tho-R1

2

Tho-R2

3

Tho-R3

4

Tho-R4

5

Tho-D1

6

Tho-D2

7

Tho-SC

8

Tho-H

9

Tho-S

10

Tho-C1

11

Tho-C2

12

Tho-P1

13

Tho-P2

14

High pressure sensor

15

Low pressure sensor

16

System error

High pressure anomaly

20

Low pressure anomaly

21

Discharge temperature error (Tho-D1)

22

Discharge temperature error (Tho-D2)

23

Liquid ooding anomaly (CM1)

24

Liquid ooding anomaly (CM2)

25

Spare

26

Fan • Compressor

Communication error

Outdoor DC fan motor anomaly (FMo1)

30

Outdoor DC fan motor anomaly (FMo2)

31

Current cut (CM1)

32

Current cut (CM2)

33

Power transistor overheat (CM1)

34

Power transistor overheat (CM2)

35

Compressor startup failure (CM1)

36

Compressor startup failure (CM2)

37

Communication error between inverter PCB and
outdoor control (CM1)

38

Communication error between inverter PCB and
outdoor control (CM2)

39

Anomalous compressor by loss of synchronism (CM1)

40

Anomalous compressor by loss of synchronism (CM2)

41

Communication error between the master unit and
slave units

42

Compressor stop by control

Operation mode change

50

Differential pressure startup prevention control

51

Protect for heating overload

52

Spare

53

'14 • KX-SM-202

-

55

-

Code

No.

Contents

Write-in contents

Data write-in

range

Number of

bytes

Write-in unit

Record data

0
100

Dehumidifying stop 0-speed

110

Dehumidifying operation 0-speed

Air inlet temp.

Heat exchanger temp. 1

00

01

02

03

04

05

06

10~52

-

19~71

0~500

1

1

1

1

2

1

2

Indoor unit 1 Thi-A

Indoor unit 1 Thi-R1

Indoor unit 1 Thi-R2

Indoor unit 1 Thi-R3

Indoor unit 1 EEV

Indoor unit I setting temperature

Indoor unit I Operation mode/Air capacity

-

19~71

-

19~71

1 pulse

0~470

0~127

−

Heat exchanger temp. 2

Heat exchanger temp. 3

05H command

Not used (Data not received)

111
112

Dehumidifying operation 2-speed

113

Dehumidifying operation 3-speed

Dehumidifying operation 1-speed

114
115

Dehumidifying operation 5-speed

116

Dehumidifying operation 6-speed

Dehumidifying operation 4-speed

200

210

Cooling operation 0-speed

211

Cooling operation 1-speed

Cooling stop 0-speed

212
213

Cooling operation 3-speed

214

Cooling operation 4-speed

Cooling operation 2-speed

215
216

Cooling operation 6-speed

300

Fan stop 0-speed

Cooling operation 5-speed

310
311

Fan operation 1-speed

312

Fan operation 2-speed

Fan operation 0-speed

313
314

Fan operation 4-speed

315

Fan operation 5-speed

Fan operation 3-speed

316
400

Heating stop 0-speed

410

Heating operation 0-speed

Fan operation 6-speed

(c) Saving of Operation Data

For the purpose to investigate the cause of trouble in the field, the operation data are always saved in the memory, and if the trouble

occurs, the data writing is stopped and the operation data prior to the trouble occurrence are recorded. These data can be retrieved to

personal computer through RS232C connector on the outdoor control PCB and utilized for probing the cause.

(i) Operation data for a period of 30 minutes prior to the present operation are saved and updated sequentially .

(ii) If an anomalous stop occurs, the data are not updated any more.

(iii) Data are written in at 1-minute interval and following data will be transmitted to PC upon demand.

Data
Software version

PID (program ID)

Outdoor unit capacity

Power supply frequency

Outdoor address

Indoor address × 16 units

Indoor capacity × 16 units

Ascii 15 byte

Ascii 2 byte

Ascii 3 byte

Ascii 2 byte

Ascii 2 byte

Ascii 2 byte × 16 units

Ascii 3 byte × 16 units

KV1C100######## (#: NULL)

5D

As shown in table at right

60

00 ~ 3F

40 ~ 7F

022 ~ 280

Data Range Example

Outdoor unit capacity data RemarksOutdoor unit capacity data

Master unit of combination

type

S: Display with Horse Power of single type or

single use of combination type

S: Display with Horse Power of master unit of

combination type

C: Display with Horse Power of slave unit of

combination type

Slave unit of combination

type

Single type Example: 20HP - [S20]

Example: 40HP - [S40]

Example: 20HP - [C20]

(iv) Error retention and monitoring data

< Indoor unit indicate data >

1°C

1°C

1°C

1°C

0.5°C

'14 • KX-SM-202

-

56

-

Code

No.

Contents

Write-in contents

Data write-in

range

Number of

bytes

Write-in unit

Record data

07

08

09

10

11

12

0~255

-10~52

0~85

—

1 Hz

—

1

1

1

1

1

Indoor unit 1 Demand frequency

Indoor unit 1 Answer frequency

Indoor unit 1 Indoor local

Indoor unit 1

Thi spare

Indoor unit 1

Model

Indoor unit 1

PID

Data contents for indoor 2 to 16 are same as above.

0~255 1 Hz 1

— —

1°C

Air outlet temp.

—

Code

No.

Contents

Write-in contents

Data write-in

range

Number of

bytes

Write-in unit

Record data

00: No anomalous, outdoor unit all anomalous ???

00~3F: Outdoor unit side, 40~6F: Indoor unit side

00

01

00~99

00~FF

—

—

1

1

Anomalous code

Address of unit where trouble occurred

02 -20~70 A/D value 1Tho-A Outdoor air temp.

Cooling liquid side

Cooling liquid side

Cooling gas side

Cooling gas side

03

04

05

06

-35~75

-35~75

-35~75

-35~75

A/D value

A/D value

A/D value

A/D value

2

2

2

2

Heat exchanger temp. 1 (Exit, Front)

Heat exchanger temp. 2 (Exit, Rear)

Heat exchanger temp. 3 (Entrance, Front

)

Heat exchanger temp. 4 (Entrance, Rear

)

07

08

09

10

20~140

20~140

-15~90

-15~90

A/D value

A/D value

A/D value

A/D value

1

1

1

1

Tho-D1 Discharge pipe temp. (CM1)

Tho-D2 Discharge pipe temp. (CM2)

Tho-C1 Under-dome temp. (CM1)

Tho-C2 Under-dome temp. (CM2)

11 20~140 A/D value 1

Tho-P1 Power transistor temp. (Heat dissipation fin)

12 20~140 A/D value 1

Tho-P2 Power transistor temp. (Heat dissipation fin)

13 -35~75 A/D value 2Tho-S Suction pipe temp.

14 18~73 A/D value 1

Tho-SC Subcooling coil temp. 1

Liquid pipe side

<Outdoor unit indicate data>

Heating operation 1-speed

Heating operation 3-speed
Heating operation 4-speed

Heating operation 2-speed

Heating operation 6-speed

Heating operation 5-speed

411
412
413
414
415
416

Anti-frost

Bit0

Aperture command ON

Bit1

FDT

other
FDE

FDK

Outdoor air intake unit

FDTC

0
1
2
3
4
5

Outdoor air treatment

Spacious area

6
7

'14 • KX-SM-202

-

57

-

Code

No.

Contents

Write-in contents

Data write-in

range

Number of

bytes

Write-in unit

Record data

16

15

20

21

18

19

24

34

35

25

26

27

28

36

-40~75

-35~75

0~50

0~50

0~50

0~50

0.00~4.15

0~65535

0~65535

0~255

0~65535

0~255

0~65535

0~65535

A/D value

A/D value

A/D value

A/D value

A/D value

A/D value

A/D value

10 min

-1

10 min

-1

1 unit

—

1 unit

—

1Hz

2

2

1

1

1

1

1

2

2

1

2

1

2

2

Injection suction pipe temp.1 (spare)

Tho-H Sub cooling coil temp.2

Inverter secondary current 1

Inverter secondary current 2

CT1 Current

CT2 Current

Liquid pipe pressure sensor

FM01 Number of rotations

FM02 Number of rotations

Indoor unit connection number

Indoor unit connection capacity

Indoor unit thermostat ON number

Indoor unit cooling thermostat ON capacity

Required Hz total

Suction pipe side

17 -40~75 A/D value 2

Receiver liquid surface detection temp.1 (spare)

22 0.00~5.00 A/D value 1High pressure sensor

23 0.00~2.00 A/D value 1Low pressure sensor

29 0~65535 — 2Indoor unit heating thermostat ON capacity

Stop

Heating

Cooling

0
1
2

30 0~2 — 1Operation mode

31 0~255 1 1Spare (Outdoor unit operation pattern)

Real range is 1~17

32 0~130 1 rps 1CM1 frequency

33 0~130 1 rps 1CM2 frequency

37 -50~70 2Discharge pressure saturation temp.

0.1°C

38 -50~70 2Intake pressure saturation temp.

0.1°C

39 1.0~10.0 0.1 1Pressure ratio

40

41

42

0~50

0~50

0~50

A/D value

A/D value

A/D value

1

1

1

Cooling operation subcooling

Super heat of suction pipe

Super heat of subcooling coil

'14 • KX-SM-202

-

58

-

Code

No.

Contents

Write-in contents

Data write-in

range

Number of

bytes

Write-in unit

Record data

43

44

45

46

47

48

49

50

51

52

53

55

56

57

58

62

0~2550

0~2550

0~127

0~25.5

—

1

1

1

1

1

FMo1 rotation command

FMo2 rotation command

Target differential temperature of heating CSST

Spare

Target super heat of outdoor unit EEVSC

Output of relay

Real range is 5~30 deg

Bit0 52C1

(Spare)

0.01ºC

0.01ºC

2

2

Under-dome super heat CM1

Under-dome super heat CM2

-32768~

-32767

-32768~

-32767

0~65535

0~255

1Hz

1Hz

2

1

Target FK

Inverter CM1 operation frequency

0~255

1Hz

1Inverter CM2 operation frequency

10 min

-1

10 min

-1

0~65535

0~65535

0~65535

1pulse

1pulse

1pulse

2

2

2

EEVH1 opening angle

EEVH2 opening angle

EEVSC opening angle

0~65535 1pulse 2EEVD opening angle

54

Target cooling low pressure of compressor

0.00~2.00 0.01MPa

1

Target heating high pressure of compressor

0.00~4.15

0.01MPa

2

1ºC

—

0.1ºC

59

60

61

—

—

—

—

—

—

1

1

1

Spare

Spare

Spare

1

——

63 1Output of relay

——

64 1Output of relay

——

Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
Bit0
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
Bit0
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7

52C2
CH1
CH2
20S
Spare(20S)
FMC1,2
Spare(FMC3)
SV1
SV2(20UF)
Spare(SV4)
SV6
SV7
Spare(SV8)
Spare(SV10)
SV11
Spare(SV12)
Spare(SV13)
Spare
Spare
Spare
CNZ1
CnH
CnY

0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON
0: OFF, 1: ON

65 0~65535

h

2

Compressor 1 cumulative operating time (estimate)

'14 • KX-SM-202

-

59

-

Code

No.

Contents

Write-in contents

Data write-in

range

Number of

bytes

Write-in unit

Record data

73

74

75

77

0~127 1

1Control status 1

Bit0

Super Link communication state

0~127 1

Control status
Oil equalization

76 0~4Control status

Low pressure error (cooling) return status

——

78 1Control status 2

——

Bit1

Bit2

Bit3

Bit4

Bit5

Bit6

Bit7

In trial operation control

In demand control

Silent mode

Spare

Spare

In pump-down control at
Start/Stop

0: SLⅠ(old SL)
1: SLⅡ(new SL)
0: Normal
1: Practice

66

67

68

0~65535

0~65535

0~65535

h

20 times

20 times

2

2

2

Compressor 2 cumulative operating time (estimate)

Compressor 1 start times

Compressor 2 start times

69

70

0~180

0~180

1 second

1 second

1

1

Control status
CM1 3-minute delay timer

Control status
CM2 3-minute delay timer

0~360

0~15

3 minutes

—

1

1

71

72

Control status
CH compressor protection timer

Control status
CH compressor protective start

15 Protective start end
0~14 During protective start

—

None
Oil equalized rotation
Oil equalized operation 1
Oil equalized operation 2
Oil equalized operation 3
Oil equalized operation 4-1
Oil equalized operation 4-2
Oil equalized operation 5-1
Oil equalized operation 5-2
Oil equalized operation 6-1
Oil equalized operation 6-2
Oil equalized operation 7-1
Oil equalized operation 7-2
Oil equalized operation 8-1
Oil equalized operation 8-2

None
Oil return (cooling)

0

1
10
20
30
41
42
51
52
61
62
71
72
81
82

0

1

2

0~2

—

1

Control status
Defrost kinds + defrost status

Control status
Oil return

Oil return (gas cycle)

—

0

11
12
13
14

21
22
23

24

31
32
33
34

Thermal condition defrost status 1
Thermal condition defrost status 2
Thermal condition defrost status 3
Thermal condition defrost status 4
Strength type thermal condition defrost status 1
Strength type thermal condition defrost status 2
Strength type thermal condition defrost status 3
Strength type thermal condition defrost status 4
Time condition defrost status 1
Time condition defrost status 2
Time condition defrost status 3
Time condition defrost status 4

1

—

0

1

2

3

4

None

Normal operation
Compressor OFF
For 70 seconds after compressor ON
After 70 to 180 seconds after compressor ON
After 180 to 195 seconds after compressor ON

0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice

Spare

0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice

Bit0

In low outdoor temperature
control

Bit1

Bit2

Bit3

Bit4

Bit5

In for replacement pump-down
control

Compressor dilution protection

Outdoor heat exchanger
refrigerant purge

Indoor heat exchanger
refrigerant purge

Spare

'14 • KX-SM-202

-

60

-

Code

No.

Contents

Write-in contents

Data write-in

range

Number of

bytes

Write-in unit

Record data

84

85 1

87 1Protection control status 3

——

Bit0

Bit1

0: Normal
1: Practice

0
1
2
3
4
5
6
7

Normal
Insufficient check operation start condition
Check operation warm-up
Check operation ON
Check operation stop
Operation valve is closed
Indoor unit abnormal
Normal ending of check operation

HP protection 1

0~127

—

1

Protection control status 1

Control status

Refrigerant quantity check

Compressor capacity control

—

Gas bypass control
HP protection 3
Heating stop indoor unit slight opening control
LP protection 1
Compressor capacity control
LP protection 2
Compressor rising rate control
LP protection 3
Outdoor unit EEV control
LP protection 4
Oil separator SV control
Td protection 1

HP protection 2

Compressor capacity control

0: Normal
1: Practice
0: Normal
1: Practice

0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice

Bit2

Bit3

Bit4

Bit6

Bit7

0: Normal
1: Practice

0: Normal
1: Practice

Spare

0: Normal
1: Practice

Spare

79 1Control status 3

Bit0 Auto backup operation

——

Bit1

Bit2

Bit3

Bit4

Bit5

Bit6

Bit7

Spare

Spare

Spare

Spare

0: Count
1: Count up

Spare

Spare

Spare

0: Normal
1: Practice

0: Count
1: Count up
0: Count
1: Count up
0: Count
1: Count up
0: Count
1: Count up
0: Count
1: Count up
0: Count
1: Count up

81 0~127 1 hour 1Backup cumulative time

82

0~2

—

1Check operation status

83

Spare

Bit0

Bit1

Bit2

Bit3

Bit4

Bit5

Bit6

Bit7

0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice

Td protection 2-1
EEVSC-Td cooling control

EEVH-Td cooling control
Td protection 4
Heating stop indoor unit slight opening control
Td protection 5
Outdoor unit EEV control
CS protection 1
Compressor capacity control
Tc protection 1
Compressor capacity control
Tc protection 2
Gas bypass control
Tc protection 3

Td protection 2-2

CM dilution protection control

Bit0

Bit1

Bit2

Bit3

Bit4

Bit5

Bit6

Bit7

0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice

86 1

Protection control status 2

—

CM protection 1
Compressor capacity control

CM protection 2
Outdoor unit EEV control

Compressor capacity control
PT protection 2
Inverter cooling fan control

Dilution rate protection

PT protection 1

88 1Protection control causes 1

—0~127

89 1Protection control causes 2

—0~127

—

—

'14 • KX-SM-202

-

61

-

Code

No.

Contents

Write-in contents

Data write-in

range

Number of

bytes

Write-in unit

Record data

91

90

95

96

93

94

99

100

0~127

0~127

0~5

0~5

0~5

0~5

0~3

0~255

0~255

—

—

1

1

1

1

1

1

1

1

1

1

1

1

1

1

Compressor stop causes

Protection control causes 3

Control status
High pressure anomaly (63H1) counter

Counter ･Current cut (CM1)

92 0~255 1h 1

Compressor stop causes lapse of time

97 0~5 1

98 1

— 1

— 1

1

1

1

1

1

1

1

1

1

—

—

—

Control status
Low pressure anomaly (running) counter

—

Control status
Low pressure anomaly (starting) counter

—

Control status
Low pressure anomaly (stopped) counter

—

Control status
Discharge temperature error (Tho-D1) counter

—

Control status
Discharge temperature error (Tho-D2) counter

0~5

—

Control status
Cut off sensor counter

0~5

—

Control status
Liquid flooding anomaly counter

—

101

102 Counter ･Current cut (CM2) —

103 0~255Counter ･Power transistor overheat (CM1)

104 0~255Counter ･Power transistor overheat (CM2)

105 0~255Counter ･Compressor startup failure (CM1)

—

106 0~255Counter ･Compressor startup failure (CM2)

—

107 0~255

Counter ･Anomalous compressor by loss of
synchronism (CM1)

—

108 0~255

Counter ･Anomalous compressor by loss of
synchronism (CM2)

—

109 0~255

Counter ･Communication error between inverter
PCB and outdoor control (CM1)

—

110 0~255

Counter ･Communication error between inverter
PCB and outdoor control (CM2)

—

111 0~255Counter ･Anomalous FMo1

—

112 0~255Counter ･Anomalous FMo2

—

113 0~255Counter ･Indoor-outdoor communications error

—

114 0~255Counter ･CPU reset

—

115 0~127Compressor error causes 1

—

116 0~127Compressor error causes 2

—

117 0~127Compressor error causes 3

'14 • KX-SM-202

-

62

-

Code

No.

Contents

Write-in contents

Data write-in

range

Number of

bytes

Write-in unit

Record data

Bit4
Bit5
Bit6
Bit7

Bit0

Bit1

Bit2

Bit3

Spare

122

Error causes
status

—

1Indoor unit control status 1

Bit2
Bit3
Bit4
Bit5
Bit0
Bit1
Bit2
Bit3
Bit4
Bit5
Bit6
Bit7
Bit0
Bit1
Bit2
Bit3

118 1

INV 1 information

——

119 1

——

120 1

——

121 1

——

Version (Initial value FFh)

DIP SW (Initial value FFh)

INV 2 information

Version (Initial value FFh)

DIP SW (Initial value FFh)

0: Normal
1: Practice

0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice
0: Normal
1: Practice

Bit4

Bit5

Bit6

Bit7

Spare

Spare

Indoor unit cooling startup
control 1 (normal)
Indoor unit cooling startup
control 2 (prevent liquid back)
Indoor unit heating startup
control
Indoor unit outlet temp. of
heating control assist
Indoor unit refrigerant
withdrawing control

123

1Indoor unit control status 2

——

Bit0

Bit1

Spare

0: Normal
1: Practice
0: Normal
1: Practice

Spare

63H1

Bit0
Bit1

0: OFF 1: ON

124

1External input

——

Spare
CNS1
CNS2
CNG1
CNG2

125

1DIP SW [SW 3]

——

SW3-1
SW3-2
SW3-3
SW3-4
SW3-5
SW3-6
SW3-7
SW3-8

126

1DIP SW [SW 4]

——

SW4-1
SW4-2
SW4-3
SW4-4
SW4-5
SW4-6
SW4-7
SW4-8

Bit0
Bit1
Bit2
Bit3

127

1DIP SW [SW 5]

——

SW5-1
SW5-2
SW5-3
SW5-4

0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON

Bit4
Bit5
Bit6
Bit7

SW5-5
SW5-6
SW5-7
SW5-8

0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON
0: OFF 1: ON

0: OFF 1: ON
Bit0
Bit1
Bit2
Bit3

128

1DIP SW [SW 6]

——

SW6-1
SW6-2

SW6-3
SW6-4

Bit4
Bit5
Bit6
Bit7

SW6-5
SW6-6
SW6-7
SW6-8

0: OFF 1: ON

0: OFF 1: ON

0: OFF 1: ON

0: OFF 1: ON

0: OFF 1: ON

0: OFF 1: ON

0: OFF 1: ON

0: OFF 1: ON
Bit0

Bit1
Bit2
Bit3

129

1Jumper SW

——

J11
J12

J13
J14

Bit4
Bit5

J15
J16

0: OFF 1: ON

0: OFF 1: ON

0: OFF 1: ON

0: OFF 1: ON

0: OFF 1: ON

0: OFF 1: ON

130

1Software SW

——

Bit3

Bit2

Bit1

Bit0

Spare

Spare

Spare

Outdoor fan snow protection
control

'14 • KX-SM-202

-

63

-

Code

No.

Contents

Write-in contents

Data write-in

range

Number of

bytes

Write-in unit

Record data

Bit4

Bit5

Switching to heating wind
temperature security priority

Spare

131 1Priority operation SW

0 First push priority

—0,1

1 Last push priority

132 40~50 1Heating setting 1 (Target exit temperature)

—

1°C

133 3.15~2.75 1Heating setting 2 (Target of high temperature)

0.05MPa

134 30~38 1Heating setting 3 (Judgment temperature)

1°C

135 0~9 1CNS1 function assignment

—

136 0~9 1CNS2 function assignment

—

137 0~9 1CNG1 function assignment

—

138 0~9 1CNG2 function assignment

—

139 0~9 1

External output function assignment function
assignment

—

140 0~255 1

State in check operation
(User’s operation, limited to 255 – 1→0 only)

141 Spare

'14 • KX-SM-202

-

64

-

(2) Outdoor PCB setting

SW1

SW2

SW3-1

SW3-2

SW3-4

SW3-5

SW3-7

SW5-1

SW5-2

SW5-3

SW5-5

SW5-6

SW5-7

SW5-8

SW7

SW8

SW9

SW4-1

SW4-2

SW4-3

SW4-4

SW4-5

SW4-6

SW4-7

SW4-8

J11

J12

J13

J14

J15

J16

Model

Outdoor unit

280 335 400 450 475

(HP)

SW4-1

SW4-2

SW4-3

SW4-4

(10)

1

0

0

0

SW4-7 SW4-8

0 ★

1

0

Master unit

Slave unit 1

Slave unit 2

0 ★

0

1

(12)

0

1

0

0

(14)

0

0

1

0

(16)

1

0

1

0

(17)

1

1

0

0

500

(18)

0

1

1

0

Outdoor address No. (Order of 10)

Outdoor address No. (Order of 1)
Inspection LED reset Normal★/Reset
Auto backup operation None★/With
Refrigerant quantity check Normal★/Check
Check operation start Normal★/Check
Forced cooling/heating Normal★/Forced cooling-heating
Test run SW Normal★/Test run
Test run mode Heating★/Cooling
Pump down SW Normal★/Pump down
SL selector New SL (Auto)★/Old SL

Capacity measurement mode

Capacity measurement mode

Capacity measurement mode

Data erase/write

7-segment display code No. increasing (order of 1)

7-segment display code No. increasing (order of 10)

Model selection

Spare

Master/slave unit setting address

Master/slave unit setting address

Power supply voltage selection

Power supply voltage selection
External input Level★/Pulse
Defrost reset temperature Normal★/Intensive
Defrost start temperature Normal★/Cold region

Spare

See following table

See following table

Keep OFF

0: OFF 1: ON

0: OFF 1: ON

Note (1) Jumper wires J13, J15 indicate short-circuit/open.

(2) Dip switch SW's indicate OFF/ON
(3) ★ indicates the factory setting (OFF).

Code Input Remarks

■Model selection with SW4-1 SW4-4

■Master/slave setting with

SW4-7, SW4-8

SW6-4 High head setting Normal★/High head

'14 • KX-SM-202

Keep OFF

560

(20)

1

1

1

0

'14 • KX-SM-202

– 65 –

'14 • KX-SM-202

(3) Indoor PCB setting

SW1 0

0
4
9

SW2
SW3
SW4
SW5-1
SW5-2
SW6-1
SW6-2

OFF OFF : 0, ON : 1

OFF

SW6-3
SW6-4

SW8-1
SW7-1 OFF

keep OFF

keep OFF

keep OFF

Normal*/switch to spare

Normal*/Test run

Test run, Drain motor

SW7-3 OFF

Spare

SW7-4 OFF

Reserved

JSL1 With

Superlink terminal spare

SW7-2

OFF

Reserved

Model selection As per model See table 1

Automatic*/Previous SL

Normal

Normal

0

Automatic

Remarks

Indoor unit address No.(Order of 10)
Indoor unit address No.(Order of 1)
Outdoor unit address No.(Order of 10)
Outdoor unit address No.(Order of 1)
Superlink selection
Indoor unit address No.(Order of 100)

0-9
0-9
0-9
0-9

Code Input Default setting

0 : OFF 1 : ON

P15

0
0
0
0
1

P22

0
0
0
0
0

P28

1
0
0
0

0

P36

0
1
0
0
0

P45

0
0
1
0

0

P56

0
1
1
0
0

P71

0
0
0
1
0

P90

0
1
0
1
0

P112

1
1
0
1
0

P140

0
0
1
1
0

P160

1
0
1
1
0

P224

0
1
1
1
0

P280

1
1
1
1
0

SW6-4
SW8-1

SW6-1
SW6-2
SW6-3

* Default setting

■Model selection with SW6-1 - SW6-4 and SW8-1

– 66 –

'14 • KX-SM-202

2.

SYSTEM TROUBLESHOOTING PROCEDURE

2.1 Basics of troubleshooting

Basic troubleshooting is to check/analyze/save data by connecting the Mente PC.

Whenever arriving at the site, always connect the Mente PC before starting work.

Method of error data analysis (Basic procedure)

•

Identify whether particular error occurred during operation or stopping.

•

Is it caused by the installation conditions of outdoor/indoor unit? (Refrigerant quantity, pipe length, short-circuit,

clogged lter, etc.)

•

Isn’t there any beginner’s mistake at the installation? (Wrong address, mistake in piping or wiring, etc.)

•

Is the failure related to any hardware (parts)? (SV main body, coil, capillary, check valve, sensor, etc.)

•

Is it a major component?

Compressor, inverter PCB and outdoor DC fan motor

•

Is it a failure of electrical component

Error on

indoor unit or

outdoor unit?

Indoor unit

Outdoor unit

Is the remote

control

connected?

Was the power

supply reset after the

error occurred?

Check and write down
the momentary data
(retained in the remote
control) just before the
error occurred

Connect the Mente PC

and restart operation

Connect the Mente PC

and restart operation

Save the data for 30

minutes before the error

occurred in Mente PC

Save the momentary

data just before the error

occurred in Mente PC

Connect the Mente PC

and restart operation

Connect the Mente PC

and restart operation

NO

NO

YES

YES

– 67 –

'14 • KX-SM-202

2.2 Explanation of troubleshooting

(a) Checking DC15V on the control PCB (Step to check if the inverter PCB fails or not)

Use this to diagnose E41, E42, E45 and E48.

(b) Inspection of short-circuit on the power transistor module terminals

Disconnect the wiring of compressor and check for short-circuit with a tester.

Inspect between terminals of: P-U, P-V, P-W, N-U, N-V, N-W and P-N

It will be easier to contact the tester at the following place at each terminal.

P: P terminal of power transistor

N: N terminal of power transistor

U: End of red harness to compressor

V: End of white harness to compressor

W: End of blue harness to compressor

Power OFF (Power supply circuit breaker OFF)

Fan motor check

Even if DC15V is detected, affection by fan motor anomaly is

suspected. Implement following check.

*Be sure to check both fan motor 1 and 2

*After completion of checking both fan motor 1 and 2,
replace the anomalous fan motor.

Turn the power ON (power circuit breaker ON)

and start operation with the test run SW.

Check between #1 and #2 of CNI1 on the control

PCB to see if DC15V is detected.

Be sure to wait for 3 minutes after turning the

power circuit breaker off.

Disconnect the fan motor wires.

(Both the power cable and control wires)

Turn the power circuit breaker OFF

Wait 3 minutes

Check whether DC15V between ①-② of CNI1

on the control PCB is detected.

Check

E41, 42, 45, 48

Connect the wires of fan motor 1 or 2

Power ON

Test run switch ON

If DC15V is detected, primary check is completed.

Return to ① and check fan motor 2

(Between ①-③ of CNI3).

If no problem on both fan motor 1 and 2, go to further

diagnosis of E41, E42, E45, E48 sequentially.

If DC15V is not detected, the connected fan motor

has anomaly.

Turn the power OFF and disconnect the wires.

If the check of fan motor 2 is not completed, return to ①

and check fan motor 2 (Between ①-③ of CNI3).

Since, unless DC15V is detected, faulty inverter PCB is suspected,

check CNI1 at the control PCB side, the connector connection of

CNI2 at the inverter side and breakage of communication wires.

If everything is all right, replace the inverter PCB.

①

②

③

Terminal (+)

P

N

P
P

P
N
N
N
U
V

W

U
V

W

Terminal (--)

N
P
U
V

W

U
V

W

P
P
P
N
N
N

Normal value (Ω)

About 1M

About 300-400

0

About 1.2M

About 1.3M

0

Several 10 M

Several 10 M

Several 10 M

Several 100K

Several 100K

Several M

Note (1) When a measured value is 0 – a few kΩ, the element may be broken. Replace the power transistor part.

– 68 –

'14 • KX-SM-202

2.3 Contents of troubleshooting

(a) List of inspection displays

1) Indoor and outdoor units

Remote

control

error code

7-segment

display

Name of inspection Classification Page

E1 – Remote control communication error Communication error 85

E2 – Duplicated indoor unit address Address setting error 86

E3 – Outdoor unit signal line error

Address pairing setting error

87

E5 – Communication error during operation Communication error 88

E6 –

Indoor heat exchanger temperature thermistor anomaly (ThI-R)

Thermistor wire breakage

89

E7 – Indoor return air temperature thermistor anomaly (ThI-A)

Thermistor wire breakage

90

E9 – Drain trouble System error 91

E10 –

Excessive number of indoor units (more than 17 units) by
controlling one remote control

Communication error 92

E11 – Address setting error between master and slave indoor units Address setting error 93

E12 – Address setting error by mixed setting method Address setting error 94

E16 –

Indoor fan motor anomaly (FDT, FDTC, FDTW, FDTS,
FDU, FDUM, FDK, FDUT71, FDFW series)

DC fan motor error 95

E18 –

Address setting error of master and slave indoor units Address setting error

96

E19 –

Indoor unit operation check drain motor check mode anomaly

Setting error 97

E20 –

Indoor fan motor speed anomaly (FDT, FDTC, FDTW,
FDTS, FDU, FDUM, FDK, FDUT71, FDFW series)

DC fan motor error 98

E21 –

Detective panel switch operation

(FDT) Panel switch error 99

E28 – Remote control temperature thermistor anomaly (Thc)

Thermistor wire breakage

100

E31 E31 Duplicated outdoor unit address No. Address setting error 101

E32 E32 Open L3 Phase on power supply at primary side Site setting error 102

E36 E36-1, 2 Discharge pipe temperature error (Tho-D1, D2) System error 103

E37

E37-1, 2
E37-4, 5
E37-5, 6

Outdoor heat exchanger temperature thermistor (Tho-R)
and subcooling coil temperature thermistor (Tho-SC, -H)
anomaly

Thermistor wire
breakage

104

E38 E38 Outdoor air temperature thermistor anomaly (Tho-A)

Thermistor wire breakage

105

E39 E39-1, 2

Discharge pipe temperature thermistor anomaly (Tho-D1, D2)

Thermistor wire breakage

106

E40 E40 High pressure anomaly (63H1-1, 2 activated) System error 107

E41 (E51)

E41 (E51)-1, 2

Power transistor overheat System error 108

E42 E42-1, 2 Current cut (CM1, 2) System error 109

E43

E43-1
E43-2

Excessive number of indoor units connected, excessive total
capacity of connection

Site setting error 110

E44 E44-1, 2 Liquid flooding anomaly (CM1,2) System error 111

E45 E45-1, 2

Communication error between inverter PCB and outdoor
control PCB

Communication error 112

E46 E46 Mixed address setting methods coexistent in same network Address setting error 113

E48

E48-1
E48-2

Outdoor DC fan motor anomaly DC fan motor error 114, 115

E49 E49 Low pressure anomaly System error 116

E53/E55 E53/E55-1, 2

Suction pipe temperature thermistor anomaly (Tho-S),
Under-dome temperature thermistor anomaly (Tho-C1, C2)

Thermistor wire
breakage

117

E54

E54-1
E54-2

High pressure sensor anomaly (PSH)
Low pressure sensor anomaly (PSL)

Thermistor wire
breakage

118

E56 E56-1, 2

Power transistor temperature thermistor anomaly (Tho-P1, Tho-P2)

Thermistor wire breakage

119

E58 E58-1, 2 Anomalous compressor by loss of synchronism System error 120

E59 E59-1, 2 Compressor startup failure (CM1, 2) System error 121

E61 E61-1, 2 Communication error between the master unit and slave units System error 122

E63 E63

Emergency stop Site setting error 123

– 69 –

'14 • KX-SM-202

(b) Troubleshooting

Error code

Remote control:
7-segment display: –

LED Green Red

Indoor

Outdoor

Content

None

Operates but does not cool

Keeps ashing

Stays OFF

Keeps ashing

Stays OFF

1. Applicable model

5. Troubleshooting

All models

Diagnosis Countermeasure

NO

YES

YES

NO

YES

YES

YES

NO

NO

NO

YES

NO

Check the indoor fan operation.
Check the temperature difference between
return and suction air of indoor unit.

Mistake in model selection.
Calculate heat load once more.

Check following operation control function.
.

Control for determine compressor rotation speed

.

Protective control by controlling compressor

rotation speed

Which control is appropriate to this phenomenon.

The unit is operating normally, but is operating
under the protective control of compressor or
other respective components.

Is the

temperature difference

between return and

suction air 10-20°C at

cooling?

Does the

heat load increase after

installation?

Is the compressor

operating?

Is the

compressor rotation

speed low?

Is the

operating conditions of

indoor/outdoor unit

under rated condition?

" WAIT "

message is displayed [for

3 seconds] when performing

cooling, dehumidifying or heating

operation from remote

control?

Note (1) Outdoor: 35ºC
Indoor : 27ºCDB/19ºCWB

It is normal.
(This unit is designed to
start in the soft start mode
by detecting the compressor
under-dome temperature
when it restart after power
reset.)

It is necessary to replace to
higher capacity unit or to
install additional unit.

Compressor refrigerant oil
protective control at starting
is activated.
For the contents of control, refer
to the compressor start control.

Compressor may be stopped
by the error detection control.
For the contents of control,
refer to anomalous stop
control by controlling
compressor rotation speed
of microcomputer control
function.

Check the followings.

•

Minor clogging of filter

•

Minor fouling of heat exchanger

•

Minor short-circuit of airflow

•

Slightly insufficient or excessive
refrigerant amount

•

Poor compression of compressor

Check suspicious points
considering appropriate
operation control.

Check the followings for
reference.

•

Severe clogging of filter

•

Severe clogging of heat
exchanger

•

Severe short-circuit of
airflow

•

Severely insufficient or
excessive refrigerant
amount

•

Under protective control of
compressor

•

Indoor unit fan tap setting

•

Valid setting of silent mode

2. Error detection method

3. Condition of error displayed

4. Presumable cause

•

Poor compression of
compressor

•

Expansion valve operation
anomaly

Note:

– 70 –

'14 • KX-SM-202

Error code

Remote control:
7-segment display: –

LED Green Red

Indoor

Outdoor

Content

None

Operates but does not heat

Keeps ashing

Stays OFF

Keeps ashing

Stays OFF

1. Applicable model

5. Troubleshooting

All models

Diagnosis Countermeasure

NO

YES

YES

NO

YES

YES

YES

NO

NO

NO

YES

NO

Check the indoor fan operation.
Check the temperature difference between
return and suction air of indoor unit.

Mistake in model selection.
Calculate heat load once more.

Check following operation control function.
.

Control for determine compressor rotation speed

.

Protective control by controlling compressor
rotation speed

Which control is appropriate to this phenomenon.

The unit is operating normally, but is operating
under the protective control of compressor or
other respective components.

Is the

temperature difference

between return and

suction air 10-30° at

heating?

Does the

heat load increase after

installation?

Is the compressor

operating?

Is the

compressor rotation

speed low?

Is the

operating conditions of

indoor/outdoor unit

under rated condition?

" WAIT "

message is displayed [for

3 seconds] when performing

cooling, dehumidifying or heating

operation from remote

control?

Note (1) Outdoor: 7ºC
Indoor : 20ºCDB

It is normal.
(This unit is designed
to start in the soft start
mode by detecting the
compressor under-dome
temperature when it restart
after power reset.)

It is necessary to replace to
higher capacity unit or to
install additional unit.

Compressor refrigerant
oil protective control at
starting is activated.
For the contents of control,
refer to the compressor
start control.

Compressor may be
stopped by the error
detection control.
For the contents of control,
refer to anomalous stop
control by controlling
compressor rotation speed
of microcomputer control
function.

Check the followings.

• Minor clogging of filter

• Minor fouling of heat exchanger

• Minor short-circuit of airflow

• Slightly insufficient or excessive
refrigerant amount

• Poor compression of compressor

Check suspicious points
considering appropriate
operation control.

Check the followings for
reference.

• Severe clogging of filter

• Severe clogging of heat

exchanger

• Severe short-circuit of airflow

• Severely insufficient or

excessive refrigerant amount

• Under protective control of

compressor

• Indoor unit fan tap setting

• Valid setting of silent mode

2. Error detection method

3. Condition of error displayed

4. Presumable cause

• 4-way valve anomaly

• Poor compression of
compressor

• Expansion valve anomaly
operation

Note:

– 71 –

'14 • KX-SM-202

Error code

Remote control:
7-segment display:

LED Green Red

Indoor

Outdoor

Content

None

Earth leakage breaker activated

Stays OFF Stays OFF

Stays OFF Stays OFF

1.Applicable model

5.Troubleshooting

All models

Diagnosis Countermeasure

NO

NO

Is insulation

of respective harnesses OK?

YES

Check of the outdoor unit grounding w ire and ea rth leakag e breaker

 Ru n an i nd ep en de nt gr ou nd in g wi re from the g ro un di ng s cr ew

of outd oo r un it t o the g ro un di ng term in al on the dist ri bu ti on
panel. (D o no t connect t o an ot he r gro un di ng w ir e. )

 In o rd er t o pr ev en t mal fu nc ti on of the earth le akage bre ak er

itself, c on fi rm t he co nf or mi ty of h ig h harmonic re gu la ti on .

* Insul at io n re si st an ce of c om pr es so r

• I mmediately af te r in st al la ti on or when the u ni t ha s been le ft
for lon g pe ri od w it ho ut power supp ly, t he i ns ul at io n
resistanc e ma y dr op to a f ew M Ω be ca us e of refrig er an t
migrate d in the co mp re ss or.
When th e ea rt h leakage b re ak er is act iv at ed at l ow er i ns ul ation
resistanc e, c heck the fo ll ow in g point s.

 6 h ou rs a ft er p ow er ON, check if th e in su la ti on re si st an ce

recover s to n or ma l.
When po we r ON , crankcase h ea te r heat up c om pressor and
evapora te s th e re fr ig er an t migrate d in the co mp re ss or.

 C he ck i f the e ar th leakage br ea ke r is co nf or me d to hi gh er

harmoni c re gu la ti on o r not .
Since t he u ni t has inv er te r, it i s nec es sa ry t o use c om po ne nt s

conform ed t o high ha rm on ic regulati on i n order t o pr event
malfu nc ti on o f ea rt h le akage break er.

YES

Check the outdoor unit grounding
wire and earth leakage breaker.

Is any harness bitten

between panel and casing

or etc?

NO

YES

Are the

insulation resistance

and coil resistance of

compressor OK?

Replace compressor. *

Secure insulation
resistance.

Secure insulation
resistance.

2. Error detection method

3.Condition of error displayed

4. Presumable cause

• Compressor anomaly

• Noise

Note:

Stays OFF

Stays OFF

–

– 72 –

'14 • KX-SM-202

Error code

Remote control:
7-segment display: –

LED Green Red

Indoor

Outdoor

Content

None

Excessive noise/vibration (1/3)

– –

– –

1. Applicable model

5. Troubleshooting

All models

Diagnosis Countermeasure

Does

the installation

of indoor/outdoor unit have

looseness?

[Installation work]

Does the noise/vibration

occur not only from the
air-conditioner but also

from entire

building?

[Units]

Does noise/vibration

occur when only the fan

is operating?

Are pipes

touching the wall

and etc?

Is fan or louver
touching other

components?

To next page

NO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

Does noise/

vibration occur during

or soon after stopping

operation of

air-conditioner?

If excessive noise/vibration

persists when sufcient

time has elapsed after
stopping the unit, it is
considered that the air­conditioner is not the
source.

Check the installed
condition carefully, and
correct the installed
position or insert rubber
cushions into the gap or
take other measure in order
to eliminate looseness.

Prevent the vibration from
transmitting to wall and etc

by xing pipes on the wall

tightly or wrapping rubber
cushion around the pipe
which goes through the
hole in the wall or applying
other appropriate means.

Strength of ceiling

wall, oor, etc. may be
insufcient. Review the

installation place or apply
reinforcement to increase
the strength.

Check for leaning of
installed unit or incorrect
mounting of fan, louver or
motor, and then specify the
contacting point and correct
it.

When the heat exchanger

or lter is clogged, clean

them.
In case that the unit is
installed at the site where
background noise is very
low, even the low level
noise from indoor unit like

as refrigerant ow noise can

be heard, but it is normal.
Before installation, check
for background noise. If
background noise is very
low, convince client prior
to installation.

2. Error detection method

3. Condition of error displayed

4. Presumable cause

➀ Improper installation work

・Improper vibration-proof

work at installation

・Insufficient strength of

mounting surface

➁ Anomaly of product

・Before/after shipment from

factory

➂ Improper adjustment during

commissioning

・Excessive/insufficient

refrigerant.

Note:

– 73 –

'14 • KX-SM-202

Error code

Remote control:
7-segment display: –

LED Green Red

Indoor

Outdoor

Content

None

Excessive noise/vibration (2/3)

– –

– –

1. Applicable model

5. Troubleshooting

All models

Diagnosis Countermeasure

[Unit]

Does noise/vibration

occur when the cooling/

heating operation is

performing

normally?

Are the pipes

contacting with the

casing?

Is continuous

hissing or roaring sound

occurred?

From previous page

To next page

Is hissing sounds

occurred at the startup or

stopping?

Is blowing

sound occurred at

the start/stop of defrost

operation during

heating mode?

Is cracking noise

occurred during heating

operation?

Is hissing

noise occurred

during cooling operation

or after operation

stopped?

NO

YES

NO

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

Rearrange the piping to
avoid contact with the
casing.

Noise/vibration is
generated when the
refrigerant gas or liquid

ows through inside of

piping of air-conditioner.
It is likely to occur
particularly during cooling
or defrosting in the heating
mode. It is normal.

The noise/vibration occurs
when the refrigerant starts

or stops owing. It is

normal.

When the defrosting starts
or stops during heating
mode, the refrigerant

ow is reversed due to

switching 4-way valve.
This causes a large change
in pressure which produces
a blowing sound. It may
also accompany the hissing
sound as mentioned above.
This is normal.

After the start or stop of
heating operation or during
defrosting, abrupt changes
in temperature cause resin
parts to shrink or expand.
This is normal.

It is the sound produced
by the drain pump that
discharges drain from
indoor unit.
The pump continues to run
for 5 minutes after stopping
the cooling operation.
This is normal.

Apply the damper sealant
at the place considered
to be the sources such
as the pressure reducing
mechanism. (Expansion
valve, capillary tube, etc.)

2. Error detection method

3. Condition of error displayed

4. Presumable cause

Note:

– 74 –

'14 • KX-SM-202

Error code

Remote control:
7-segment display: –

LED Green Red

Indoor

Outdoor

Content

None

Excessive noise/vibration (3/3)

– –

– –

1. Applicable model

5. Troubleshooting

All models

Diagnosis Countermeasure

[Adjustment

during commissioning]

Does noise/vibration occur when the

cooling/heating operation is performed

under anomalous

condition?

From previous page

YES

If insufcient cooling/

heating problem happens
due to anomalous operating
conditions at cooling
/heating, followings are
suspicious.

• Excessive charged
amount of refrigerant

• Insufficient charge
amount of refrigerant

• Intrusion of air, nitrogen,
etc.

In such case, it is necessary
to recover refrigerant,
vacuum-dry and recharge
refrigerant.

* Since there could be
many causes of noise/
vibration, the above may
not cover all.
In such case, check the
conditions when, where,
how the noise/vibration
occurs according to
following check points and
ask our consultation.

• Indoor/outdoor unit

• Cooling/heating/fan
mode

• Startup/stop/during
operation

• Operating condition

(Indoor/outdoor

temperatures and
pressures)

• Time it occurred

• Operation data retained
by remote control or
Mente PC such as
compressor rotation
speed, heat exchanger
temperature, EEV
opening degree and etc.

• Tone (If available, record
the noise)

• Any other anomalies.

2. Error detection method

3. Condition of error displayed

4. Presumable cause

Note:

– 75 –

Error code

Remote control:
7-segment display: –

LED Green Red

Indoor

Outdoor

Content

'14 • KX-SM-202

None

Louver motor anomaly

Keeps ashing

Stays OFF

Keeps ashing

Stays OFF

1. Applicable model

5. Troubleshooting

All models

Diagnosis Countermeasure

NO

YES

Is LM harness

broken?

Is there

any disconnection

or breakage of LM

connector?

Is LM locked?

Does LM turn

smoothly?

Is there

any problem on

the connection

link?

� Check at the indoor unit side.

Is the

setting of airflow

direction change

prohibited?

Check how LS reacts

when the power is turned

OFF and ON again

Check the remote control whether
it is fixed free flow setting.

YES

NO

Does the louver

link press LS till crick sound

can be heard?

NO

NO

YES

NO

NO

YES

In cases of FDTW, FDTS and FDTQ

Does the

louver operate when

power on?

Note (1) LM: Louver motor
(2) LS: Limit switch

YES

NO

NO

NO

NO

YES

YES

Operate after waiting for more than 1 minute.

It is normal if LM can
be stopped by pressing
LS two times.

In cases of FDT, FDTC, FDE and FDK

Check the remote control whether
it is fixed free flow setting or not.

Correct it.

Repair harness.
Check connector (CNJ)

Replace Louver Motor.

Correct it.

Correct it.

Replace indoor control
PCB.

Correct it.

Adjust LM lever and then
check again.

• LS anomalyReplace.

• Indoor control PCB
anomalyReplace.

2. Error detection method

3. Condition of error displayed

4. Presumable cause

• Louver motor anomaly

• Disconnection/breakage of
LM harness

• Limit switch anomaly

Note:

– 76 –

Error code

Remote control:
7-segment display: –

LED Green Red

Indoor

Outdoor

Content

'14 • KX-SM-202

None

Power supply system anomaly

(Power supply to indoor unit PCB)

Stays OFF Stays OFF

Stays OFF

2-time ash

1. Applicable model

5. Troubleshooting

All models

Diagnosis Countermeasure

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

NO

NO

YES

YES

Is

AC 220-240V/220V

detected between L-N on

the indoor terminal

block?

Note (2)
Disconnect CNW1 on
models equipped with
transformer.

Note (3) LM: Louver motor
FM: Fan motor

Note (4) ⑤ for GND

IsAC

380/415 V for 3-phase

unit detected between L1, L2, and L3 on

the outdoor terminal block

respectively.

Are fuses OK?

Is power

supply between①-③ of

CNW0 OK?

Is

DC5V detected

between ④-⑤ of

CNW2?

Is power

supply to FM, LM and etc.

OK?

Note (1)
Check the fuse at the power supply side.

(1)

(2)

(3)

(4)

Model equipped with
transformer (Tr㧵)

Models other than
shown at left

Is DC18V or higher

detected between Red-

Red (CNW2) at the

transformer secondary

side?

Outdoor Noise lter PCB

anomaly  Replace it.

Wrong wiring or broken
wires between outdoor and
indoor units.

Indoor power PCB
anomaly  Replace it.

Replace FM, LM and etc.

Replace fuse.

Indoor power PCB anomaly



Replace it.

Indoor control PCB
anomaly  Replace it.

Replace transformer.

Indoor control PCB
anomaly  Replace it.

2. Error detection method

3. Condition of error displayed

4. Presumable cause

• Wrong connection or breakage
of connecting wires

• Blown fuse

• Transformer anomaly

• Indoor power PCB anomaly

• Broken harness

• Indoor control PCB anomaly

Note:

– 77 –

Error code

Remote control:
7-segment display: –

LED Green Red

Indoor

Outdoor

Content

'14 • KX-SM-202

None

Power supply system error

(Power supply to remote control)

Stays OFF

Keeps lighting

Stays OFF

Keeps lighting

1. Applicable model

5. Troubleshooting

All models

Diagnosis Countermeasure

Isn't there any

loose connection of remote

control wires?

Isn't remote

control wire broken or

short-circuited?

Is 23V

or higher detected

between Brown-Brown at the

transformer secondary

side?

Is

DC18V

detected between

①-② of

CNW2?

Disconnect the
remote control

wires.

NO

Is DC15V or higher
detected between X-Y
of indoor unit terminal

block?

Model equipped
with transformer
(Tr㧵)

Models other
than shown
at left

YES

YES

YES

YES

NO

NO

YES

NO

NO

Correct it.

Replace wires.

Replace remote control.

Indoor power PCB
anomaly



Replace it.

Indoor control PCB
anomaly



Replace it.

Replace transformer.

Indoor control PCB
anomaly



Replace it.

2. Error detection method

3. Condition of error displayed

4. Presumable cause

• Remote control wire
breakage/short-circuit

• Remote control anomaly

• Malfunction by noise

• Indoor power PCB anomaly

• Broken harness

• Indoor control PCB anomaly

Note:

– 78 –

Error code

Remote control:
7-segment display: –

LED Green Red

Indoor

Outdoor

Content

'14 • KX-SM-202

WAIT

WAIT

(1)

Keeps ashing

Stays OFF

Keeps ashing Keeps ashing

1. Applicable model

5. Troubleshooting

All models

(In case that is kept
on displaying on the remote
control for more than 2 minutes
after power ON.)

Diagnosis Countermeasure

NO

NO

NO

NO

NO

NO

NO

YES

NO

NO

YES

YES

YES

YES

YES

YES

YES

is kept on

displaying on the remote

control for more than 2

minutes after power ON.

Once turn OFF the breaker

and turn ON it again at 3

minutes after power OFF.

Isn't

the power fuse (5A) on the

outdoor control PCB

blown?

Is

the connection of wire

between noise filter and

inverter PCBs OK?

Are

the wires between indoor

and outdoor units

connected properly ?

Is

AC220-240V detected

between L-N at indoor

terminal block?

Is

AC380-415V detected

between L1-L2, L2-L3, L3-L1

respectively at outdoor

terminal block?

Does

indoor green LED keep

flashing?

Does

indoor green LED flash

2 times?

Is

AC380-415V detected at

the secondary side of

noise filter PCB terminal?

Does it become normal?

Replace fuse

Refer next page.

WAIT

Replace noise lter PCB.

Connect wires correctly.

Indoor control PCB anomaly



Replace it.

Indoor/outdoor control PCB
anomaly



Replace it.

Remote control anomaly



Replace it.
Breakage of wires for remote
control



Replace it.

Correct the connecting wires
between indoor and outdoor
units.

Outdoor control PCB anomaly



Replace it.

Breakage of connecting wire
Noise.

Indoor control PCB anomaly



Replace it.

2. Error detection method

3. Condition of error displayed

4. Presumable cause

• Fuse blown

• Noise filter anomaly

• Anomalous connection of
wire between PCBs

• Indoor control PCB anomaly

• Remote control anomaly

• Breakage of connecting wires
of remote control

• Outdoor control PCB anomaly

Note:

(1)

When anomaly occurs during establishing communication between indoor and outdoor unit, error code E5 is displayed (outdoor red

LED

ash 2-times).

In case of E5, the way of troubleshooting is same as above mentioned (except for checking of connecting wire).
When reset the power after E5 occurs, if this anomaly recurs, is displayed on remote control. If power ON/OFF is repeated in
a short period (within 1 minute), may be displayed. In such case, please wait for 3 minute after the power breaker OFF.

(2)

If any error is detected 30 minutes after displaying “ ” on the remote control, the display changes to “INSPECT I/U”.

WAIT

WAIT

WAIT

WAIT

– 79 –

Error code

Remote control:
7-segment display: –

LED Green Red

Indoor

Outdoor

Content

'14 • KX-SM-202

WAIT

WAIT

(2)

Keeps ashing

Stays OFF

Keeps ashing Keeps ashing

1. Applicable model

5. Troubleshooting

All models

(In case of fuse blown, how
to check the unit before
replacement of fuse.)

Diagnosis Countermeasure

YES

YES

NO

NO

YES

NO

Isn't

there any short circuit

between phases of noise

filter?

Isn't

there any crack or damage

on power transistor

module or diode stack?

Isn't

there any anomaly on

reactor?

Replace noise filter

Replace reactor

Replace inverter PCB

Replace fuse.

2. Error detection method

3. Condition of error displayed

4. Presumable cause

• Fuse blown

• Noise filter anomaly

• Anomalous connection of
wire between PCBs

• Indoor control PCB anomaly

• Remote control anomaly

• Breakage of connecting wires
of remote control

• Outdoor control PCB anomaly

Note:

– 80 –

Error code

Remote control:
7-segment display: –

LED Green Red

Indoor

Outdoor

Content

'14 • KX-SM-202

WAIT

WAIT

(3)

Keeps ashing

Stays OFF

Keeps ashing Keeps ashing

1. Applicable model

5. Troubleshooting

All models

(No display on the remote
control after power ON.)

Diagnosis Countermeasure

NO

NO

NO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

YES

YES

No display on the remote
control after power ON.

Does

indoor green LED keep

flashing?

Does

outdoor red LED flash

2-times?

Is

the connecting wires

between indoor and outdoor

units connected

properly?

Is

AC380-415V detected

between L1-L2, L2-L3,

L3-L1 respectively at outdoor

terminal block?

Is

AC220-240V detected

between L-N at indoor

terminal block?

Is

The fuse on indoor control

PCB OK?

Is

AC18V or higher is

detected between Red-

Red at secondary side of

indoor transformer? (1)

Is

DC10-11V between

X-Y at indoor control PCB

side when removing

remote control?

Note (1)
Model equipped with
transformer (Tr㧵) only

Fuse blown



Replace fuse.

Transformer anomaly.

Remote control wire
short-circuited.

Remote control anomaly.

Indoor control PCB
anomaly.
Remote control anomaly.
Breakage of connecting
wires of remote control.

Correct the connecting
wires properly.

Outdoor control PCB
anomaly



Replace it.

Breakage of connecting
wire
Noise.

Indoor control PCB
anomaly



Replace it.

2. Error detection method

3. Condition of error displayed

4. Presumable cause

• Fuse blown

• Noise filter anomaly

• Anomalous connection of
wire between PCBs

• Indoor control PCB anomaly

• Remote control anomaly

• Breakage of connecting wires
of remote control

• Outdoor control PCB anomaly

Note:

– 81 –

Error code

Remote control:
7-segment display: –

LED Green Red

Indoor

Outdoor

Content

'14 • KX-SM-202

WAIT

WAIT

(4)

Keeps ashing

Stays OFF

Keeps ashing Keeps ashing

1. Applicable model

5. Troubleshooting

All models

(In case that is kept
on displaying on the remote
control for more than 2 minutes
after power ON.)

Diagnosis Countermeasure

NO

Does

outdoor green LED keep

flashing?

is kept on
displaying on the remote
control for more than 2
minutes after power ON.

Does

indoor green LED keep

flashing?

Does

outdoor red LED flash

2 times?

Are

the wires between indoor

and outdoor units

connected properly ?

Is

AC380-415V detected

between L1-L2, L2-L3, L3-L1

respectively at outdoor

terminal block?

Is

AC220-240V detected

between L-N at indoor

terminal block?

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

A

Refer next page.

WAIT

Indoor control PCB
anomaly



Replace it.

Indoor control PCB
anomaly



Replace it.

Remote control anomaly



Replace it.
Breakage of wires for
remote control



Replace it.

Correct the connecting
wires between indoor and
outdoor units.

Outdoor control PCB
anomaly



Replace it.

Breakage of connecting
wire
Noise.

Indoor control PCB
anomaly



Replace it.

2. Error detection method

3. Condition of error displayed

4. Presumable cause

• Fuse blown

• Noise filter anomaly

• Anomalous connection of
wire between PCBs

• Indoor control PCB anomaly

• Remote control anomaly

• Breakage of connecting wires
of remote control

• Outdoor control PCB anomaly

Note:

WAIT

– 82 –

Error code

Remote control:
7-segment display: –

LED Green Red

Indoor

Outdoor

Content

'14 • KX-SM-202

WAIT

WAIT

(5)

Stays OFF Stays OFF

Stays OFF Stays OFF

1. Applicable model

5. Troubleshooting

All models

(In case that LED on outdoor
control PCB stays OFF.)

Diagnosis Countermeasure

In case that LED on

outdoor control PCB stays

OFF.

Is

power fuse (5A) on the

outdoor conrol PCB

blown?

Is

AC380-415V detected at

secondary side of noise

filter?

Are

connecting wires between

noise filter and inverter PCB

connected properly?

Is

the connection of

connecting wire of reactor

OK?

Is

there any anomaly on

outdoor fan motor?

Once turn OFF the breaker

and turn ON it again at 3

minutes after power OFF.

Does it become normal?

Check inverter before

replacement of 52C.

NO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

A

B

Refer next page.

From previous page.

Normal
(Malfunction by temporary
noise.)

Replace noise lter.

Connect the connecting
wire properly.

Correct connection.
(In case of breakage of
wire replace it.)

Outdoor control PCB
anomaly



Replace it.

Outdoor fan motor
anomaly



Replace it.

2. Error detection method

3. Condition of error displayed

4. Presumable cause

• Fuse blown

• Noise filter anomaly

• Anomalous connection of
wire between PCBs

• Indoor control PCB anomaly

• Remote control anomaly

• Breakage of connecting wires
of remote control

• Outdoor control PCB anomaly

Note:

– 83 –

Error code

Remote control:
7-segment display: –

LED Green Red

Indoor

Outdoor

Content

'14 • KX-SM-202

WAIT

WAIT

(6)

Stays OFF Stays OFF

Stays OFF Stays OFF

1. Applicable model

5. Troubleshooting

All models

(In case of fuse blown, how
to check the unit before
replacement of fuse.)

Diagnosis Countermeasure

Isn't

there any short circuit

between phases of noise

filter?

Replace Noise filter

Replace inverter PCB

Replace power fuse

Replace electrolytic

capacitor

Replace reactor

Isn't

there any short circuit

between phases at input

terminal of inverter

PCB?

Isn't

there any crack or damage

on power transistor module

or diode stack?

Isn't

there any anomaly on

reactor?

Isn't

there any anomaly on

electrolytic capacitor?

NO

NO

NO

NO

NO

B

YES

YES

YES

YES

YES

From previous page.

2. Error detection method

3. Condition of error displayed

4. Presumable cause

• Fuse blown

• Noise filter anomaly

• Anomalous connection of
wire between PCBs

• Indoor control PCB anomaly

• Remote control anomaly

• Breakage of connecting wires
of remote control

• Outdoor control PCB anomaly

Note:

– 84 –

Error code

Remote control:
7-segment display: –

LED Green Red

Indoor

Outdoor

Content

'14 • KX-SM-202

[No display]

Stays OFF Stays OFF

Stays OFF Stays OFF

1. Applicable model

5. Troubleshooting

All models

(No display on the remote
control after power ON.)

Diagnosis Countermeasure

YES

YES

YES

NO

NO

NO

No display on the remote

control after power ON.

Is DC10V

or higher between X-Y

detected at remote

control terminal?

Is DC10V

or higher between X-Y

wires detected when

removing remote

control?

Are

connecting wires between

indoor and outdoor units

connected properly?

Remote control anomaly.

Remote control anomaly.

Correct connecting wire.

Indoor control PCB
anomaly.

2. Error detection method

3. Condition of error displayed

4. Presumable cause

• Fuse blown

• Noise filter anomaly

• Anomalous connection of
wire between PCBs

• Indoor control PCB anomaly

• Remote control anomaly

• Breakage of connecting wires
of remote control

• Outdoor control PCB anomaly

Note:

[No display]

– 85 –

Error code

Remote control:
7-segment display: –

LED Green Red

Indoor

Outdoor

Content

'14 • KX-SM-202

E1

Remote control

communication error

Keeps ashing

Stays OFF

Keeps ashing

Stays OFF

1. Applicable model

5. Troubleshooting

All models

Diagnosis Countermeasure

Is it possible to

reset normally by the power

supply reset?

Does
the drain pump start
automatically at one
minutes after power

ON?

Turn SW7-1 OFF. → ON

Disconnect the wire ③

between indoor and outdoor

units.

YES

YES

NO

Note (1) SW7-1: OFF → ON

Note (2) Does the remote control displays “Internal check ON” even
after 3 minutes?

Reset power supply

(2)

(1)

NO

Malfunction by temporary
noise.
Check peripheral
environment.

Indoor control PCB
anomaly



Replace it.

Remote control
anomaly



Replace it.

2. Error detection method

When normal communication
between remote control and
indoor unit is interrupted
for more than 2 minutes.
(Detectable only with the
remote control.)

3. Condition of error displayed

Same as above

4. Presumable cause

• Anomalous communication
circuit between remote control
and indoor unit.

• Noise

Note:

If the indoor unit cannot communicate normally with the remote control for 180 seconds, the indoor unit PCB starts to
reset automatically.

– 86 –

'14 • KX-SM-202

Error code

Remote control:
7-segment display:

LED Green Red

Indoor

Outdoor

Content

E2

–

Duplicated indoor unit address

Keeps ashing Keeps ashing

Keeps ashing

Stays OFF

1. Applicable model

5. Troubleshooting

All models

Diagnosis Countermeasure

Is the number of

connected indoor units up

to 128 units?

Is the different

address No. assigned to each

indoor unit?

Is E2 displayed?

Reset the power supply and restart.

Caution:
Unless the power
supply is reset,
addresses will not
be confirmed.

YES

NO

YES

NO

YES

NO

Review number of
connected units.

Correct indoor unit address
setting.

Implement test run.

Replace indoor control
PCB. *

* Before replacement,

conrm whether the

rotary switch for address
setting is not damaged.
(It was experienced that
No. 5 on rotary switch
was not recognized.)

2. Error detection method

More than 129 indoor units are
connected in the same Superlink
system.
Duplicated indoor unit address

3. Condition of error displayed

Same as above

4. Presumable cause

• Number of connected indoor

units exceeds the limitation.

• Duplicated indoor unit

address

• Indoor control PCB anomaly

Note:

– 87 –

'14 • KX-SM-202

Error code

Remote control:
7-segment display:

LED Green Red

Indoor

Outdoor

Content

E3/5

–

Outdoor unit signal line error

Keeps ashing

2-time ash

Keeps ashing

Stays OFF

1. Applicable model

5. Troubleshooting

All models

Diagnosis Countermeasure

Is the power

supply to outdoor

unit OK?

Is the

Superlink communication

wire connection

OK?

Reset the power supply and restart.

E3 is a communication error that occurs when communication between
indoor and outdoor units is not established at all. Once the communication
between indoor and outdoor units is established, it changes to E5.
In both cases, check signal line wired locally.

YES

Is the
outdoor unit address
set on the indoor unit

OK?

YES

Is the LED

on indoor control

PCB OK?

YES

Is protective

fuse for the Superlink

circuit blown?

NO

Does E3/E5 occurs?

YES

NO

NO

NO

YES

YES

NO

NO

Temporary malfunction by
noise.
Identify the source of noise
and correct it.

Change to spare circuit.

Indoor control PCB
anomaly



Replace it.

Correct it.

Correct it.

Correct it.

Outdoor control PCB
anomaly



Replace it.

2. Error detection method

No outdoor unit exists in the
same Superlink system.

3. Condition of error displayed

Same as above

4. Presumable cause

• Power is not supplied to the
outdoor unit

• Unmatch of pairing between
indoor and outdoor units

• Indoor control PCB anomaly

• Outdoor control PCB
anomaly

• Missing local wiring

Note:

– 88 –

'14 • KX-SM-202

Error code

Remote control:
7-segment display:

LED Green Red

Indoor

Outdoor

Content

E5

–

Communication error during operation

Keeps ashing

*See below

Keeps ashing

2-time ash

1. Applicable model

5. Troubleshooting

All models

Diagnosis Countermeasure

Does the

remote control

LCD becomes

normal?

Reset the power supply and restart.

YES

NO

* In case that indoor red LED stays OFF

Is the

connection of signal wires

at the outdoor unit side

OK?

Is the
connection of signal wires
between indoor and outdoor

units OK?

Does the

remote control LCD

becomes normal?

Note (1) Check the connection (disconnection, looseness)

of signal wires at outdoor terminal block.

Reset the power supply and restart.

Note (2) Check the connection (disconnection, looseness,

breakage) of signal wires between indoor and
outdoor units.

YES

NO

YES

NO

YES

NO

* In case that indoor red LED flashes 2 times

Repair signal wires.

Repair signal wires.

Go to the diagnosis of

WAIT

(1)

Unit is normal.
(Malfunction by temporary
noise, etc.)

Outdoor control PCB anomaly
(Network communication
circuit anomaly)

→

Replace it.

Unit is normal.
(Malfunction by temporary
noise, etc.)

2. Error detection method

When the communication
between indoor and outdoor
units is interrupted for more than
2 minutes.

3. Condition of error displayed

When this anomaly is detected
during operation.

4. Presumable cause

• Unit address No. setting error

•

Remote control wires broken

•

Poor connection/disconnection
of remote control wires

• Indoor control PCB anomaly

Note:

When the pump down switch is turned on, communication between indoor and outdoor units is cancelled so that
"Communication error E5" will be displayed on the remote control and indoor control PCB, but this is normal.

– 89 –

'14 • KX-SM-202

Error code

Remote control:
7-segment display:

LED Green Red

Indoor

Outdoor

Content

E6

–

Indoor heat exchanger

temperature thermistor anomaly (ThI-R)

Keeps ashing

1-time ash

Keeps ashing

Stays OFF

1. Applicable model

5. Troubleshooting

All models

Diagnosis Countermeasure

Is

the connector of

thermistor connected

properly ?

Regarding the characteristics of
the thermistor, see the following chart.

Are

the characteristics

of thermistor OK?

*1

NO

NO

YES

*1 Check several times to prove any poor connection

YES

Temperarture thermistor resistance (kΩ)

Temperature-resistance characteristics of indoor heat

exchanger temperature thermistor (ThI-R1, R2, R3)

5kΩ at 25ºC

Temperature (ºC)

Insert the connector
securely.

Replace thermistor.
(ThI-R)

Replace indoor control.
PCB

2. Error detection method

Detection of anomalously low
temperature (resistance)
of ThI-R1, R2, R3.

3. Condition of error displayed

• If -50ºC or lower is
detected for 5 seconds
continuously, compressor
stops. After 3-minutes delay,
the compressor is restarted
automatically, but if this
anomaly occurs again within
60 minutes after the initial
detection.

• Or if 70ºC or higher is
detected for 5 seconds
continuously.

4. Presumable cause

• Anomalous connection
of indoor heat exchanger
temperature thermistor

• Indoor heat exchanger
temperature thermistor
anomaly

• Indoor control PCB anomaly

Note:

– 90 –

'14 • KX-SM-202

Error code

Remote control:
7-segment display:

LED Green Red

Indoor

Outdoor

Content

E7

–

Indoor return air

temperature thermistor anomaly (ThI-A)

Keeps ashing

1-time ash

Keeps ashing

Stays OFF

1. Applicable model

5. Troubleshooting

All models

Diagnosis Countermeasure

Is

the connector of

thermistor connected

properly ?

Regarding the characteristics of
the thermistor, see the following chart.

Temperature-resistance characteristics of indoor

return air temperature thermistor (ThI-A)

Are
the characteristics
of thermistor OK?

*1

NO

NO

YES

YES

*1 Check several times to prove any poor connection

15

10

5

0 10 30 40 20 50

Temperature sensor resistance (kΩ)

Temperature (°C)

5kΩ at 25°C

Insert the connector
securely.

Replace thermistor
(ThI-A).

Replace indoor control
PCB.

2. Error detection method

Detection of anomalously low
temperature (resistance) of
ThI-A.

3. Condition of error displayed

• If -50°C or lower is
detected for 5 seconds
continuously, compressor
stops. After 3-minutes delay
the compressor is restarted
automatically, but if this
anomaly occurs again within
60 minutes after the initial
detection.

• Or if 48°C or higher is
detected for 5 seconds
continuously.

4. Presumable cause

• Anomalous connection of
indoor return air temperature
thermistor

• Indoor return air temperature
thermistor anomaly

• Indoor control PCB anomaly

Note:

– 91 –

'14 • KX-SM-202

Error code

Remote control:
7-segment display:

LED Green Red

Indoor

Outdoor

Content

E9

–

Drain trouble

Keeps ashing

1-time ash

Keeps ashing

Stays OFF

1. Applicable model

5. Troubleshooting

FDT, FDTC, FDTW, FDTQ,
FDTS, FDR, FDU, FDUM, and
FDUT series

Diagnosis Countermeasure

Is the humidifier connected?

Drain motor ON from the remote control.

YES

Does the

drain motor

operate?

YES

NO

Check the error data in the remote control.

Is there any overflow?

Is DC

12V detected at CN1

connector?

Is the

CN1 connected

firmly

NO

YES

Is there any

anomaly on the optional

equipment?

NO

YES

YES

Is the

humidifier Drain

Motor interlocked by the indoor unit

function setting of remote

control?

NO

Is

AC220/240V

or DC12V detected at

CNR?

NO

YES

Is the

drain piping unclogged?

Is the drain pipe

slop OK?

NO

YES

NO

YES

NO

NO

YES

Check oat switch.

Check the connection of
CNI.
If it is loose, connect it
securely.

Replace indoor control
PCB.

Check optional equipment

Correct setting to

"Humidier drain motor

interlock".

Indoor control PCB or
power PCB

(FDTC)

anomaly

→

Replace it.

Check the wiring of drain
motor.

Correct it.

Check drain motor.

2. Error detection method

Float switch is activated.

3. Condition of error displayed

If the oat switch OPEN

is detected for 3 seconds

continuously or if oat switch

connector is disconnected or
wire broken.

4. Presumable cause

• Indoor control PCB anomaly

• Mistake in setting of float
switch

• Mistake in setting of
humidifier drain motor
interlock

• Mistake in setting of optional
equipment

• Mistake in drain piping

• Drain motor anomaly

• Disconnection/breakage of
drain motor wires

Note:

When this anomaly occurs at power ON, disconnection of connector or breakage of wire of oat switch is suspected.

Check and correct it (or replace it, if necessary).

– 92 –

'14 • KX-SM-202

Error code

Remote control:
7-segment display:

LED Green Red

Indoor

Outdoor

Content

E10

–

Excessive number of indoor units (more than 17 units)

by controlling one remote control

Keeps ashing

Stays OFF

Keeps ashing

Stays OFF

1. Applicable model

5. Troubleshooting

All models

Diagnosis Countermeasure

Aren't more

than 17 indoor units

connected to one remote

control?

NO

YES

Remote control anomaly 
Replace it.

Reduce to 16 or less units.

2. Error detection method

When it detects more than 17 of
indoor units connected to one
remote control.

3. Condition of error displayed

Same as above

4. Presumable cause

• Excessive number of indoor

units connected.

• Remote control anomaly.

Note:

– 93 –

'14 • KX-SM-202

E11

Address setting error between

master and slave indoor units

Keeps flashing Keeps flashing

1.Applicable model

5.Troubleshooting

All models

Diagnosis Countermeasure

• In cases of RC-E5
Return address No. to
“IU …” using [▲] or
[▲] button.

• In cases of RC-EX1A
Menu➞ Next

➞

IU settings ➞ Select IU

2. Error detection method

IU address has been set using
the “Master IU address set”
function of remote control.

3.

Condition of Error displayed

Same as above

4. Presumable cause

Same as above

Note:

Is “Master IU

address set” function of remote

control used?

E11 occurs

YES

Error code

Remote control:

LED Green Red

Indoor

Content

IU IU IU

R/C

In case the wiring is below and “Master IU address
set” is used, E11 is appeared.

Error code

Remote control:
7-segment display:

LED Green Red

Indoor

Outdoor

Content

E11

–

Address setting error between

master and slave indoor units

Keeps ashing

Stays OFF

Keeps ashing

Stays OFF

– 94 –

Error code

Remote control:
7-segment display: –

LED Green Red

Indoor

Outdoor

Content

'14 • KX-SM-202

E12

Address setting error

by mixed setting method

Keeps ashing Keeps ashing

Keeps ashing

Stays OFF

1. Applicable model

5. Troubleshooting

All models

Diagnosis Countermeasure

Isn't the

automatic setting and

manual setting mixed in the address

setting method for indoor

units?

YES

NO

Review address setting.

Replace indoor control
PCB.

2. Error detection method

Automatic address setting and
manual address setting are mixed
when setting address of indoor
units.

3. Condition of error displayed

Same as above

4. Presumable cause

Mistake in address setting for
indoor unit.

Note:

Address setting method list (Figures in [ ] are for Previous Superlink models)

Models for new Superlink protocol Models for Previous Superlink protocol

Indoor unit address setting

Outdoor unit

address setting

Indoor unit address setting

Outdoor unit

address setting

Indoor unit No. SW Outdoor unit No. SW Outdoor unit No. SW Indoor unit No. SW Outdoor unit No. SW Outdoor unit No. SW

Manual address setting

(New SL)

000-127 00-31 00-31

00-47

00-47 00-47

(

Previous SL)[00-47] [00-47] [00-47]

Automatic address setting for
single refrigerant system

(New SL)

000 49 49 49 49 49

(

Previous SL

)

Automatic address setting for
multiple refrigerant systems

(New SL)

000 49 00-31

Not available

(

Previous SL

)

Not available

– 95 –

'14 • KX-SM-202

E16

–

Indoor fan motor anomaly

(FDT, FDTC, FDTW, FDTS, FDU,

FDUM, FDK, FDUT71, FDFW series)

Keeps ashing

1-time ash

Keeps ashing

Stays OFF

1. Applicable model

5. Troubleshooting

FDT, FDTC, FDTW, FDTS,
FDU, FDUM, FDK, FDUT71,
FDFW series only

Diagnosis Countermeasure

NO

YES

YES

Does any

foreign matter intervene

in rotational area of fan

propeller?

Is DC280V

detected between -(-) of

fan motor connector

CNM?

(1)(2)

Does it become normal?

Is the fuse F3 (F4) or F202 blown?

Does the fan

rotate smoothly when turned

by hand?

YES

NO

NO

NO

YES

NO

YES

Reset the power supply and restart.

Note (1) () is GND.
(2) Valve in ( ) are for the model
FDFW and FDK

.

Remove foreign matter.

Replace the fan motor.

Check power supply
voltage.

Replace fan motor and

power PCB.

Replace fan motor. (If

the anomaly persists after
replacing the fan motor,
replace the indoor control
PCB.)

Malfunction by temporary
noise.

2. Error detection method

Detected by revolution speed of
indoor fan motor.

3. Condition of error displayed

When actual revolution speed of
indoor fan motor drops to lower
than 200min-1 for 30 seconds
continuously, the compressor
and the indoor fan motor stop.

After 2-seconds delay, fan

motor starts again automatically,
but if this anomaly occurs 4
times within 60 minutes after
the initial detection.

4. Presumable cause

• Indoor fan motor anomaly

• Foreign matter at rotational

area of fan propeller

• Fan motor anomaly

• Dust on control PCB

• Blown fuse

• External noise, surge

Note:

Error code

Remote control:
7-segment display:

LED Green Red

Indoor

Outdoor

Content

– 96 –

'14 • KX-SM-202

Address setting error of

master and slave indoor units

Keeps flashing

Keeps flashing

Stays OFF

1-ime flash

1. Applicable model

5. Troubleshooting

All models

࡮Address setting error of the
master indoor unit
࡮No power supply to the master
indoor unit
࡮No co nnection of Super link
signal wires between master
and slave indoor unit.

Diagnosis Countermeasure

2. Error detection method

3.

Condition of Error displayed

4. Presumable cause

Note:

NO

NO

NO

YES

YES

YES

Is the power

surely supplied to the master

indoor unit ?

Is the address

setting for the master indoor

unit correct?

Correct the address setting of

Supply the power to the master

Connect the Superlink signal

Indoor control PCB anomaly

slave indoor unit. If it is not

the master indoor unit as well.)

Are the Superlink

signal wires connected between

master and slave

indoor units?

(1) When the address setting for
the master indoor unit is not
existing in the same Superlink
system.
(2) When the address setting for
the slave indoor unit is set for
the master indoor unit
redundantly.

Same as above

the master indoor unit

indoor unit

wires correctly.

→ Replace it

(Firstly replace PCB on the

recovered, replace PCB on

E18

–

Error code

Remote control:
7-segment display:

LED Green Red

Indoor

Outdoor

Content

– 97 –

'14 • KX-SM-202

E19

–

Indoor unit operation check,

drain motor check mode anomaly

Keeps ashing

1-time ash

Keeps ashing

Stays OFF

1. Applicable model

5. Troubleshooting

All models

Diagnosis Countermeasure

Indoor control PCB

anomaly
(Anomalous SW7)



Replace.

Turn SW7-1 on the indoor
control PCB OFF and reset
the power.

2. Error detection method

E19 occurs

3. Condition of error displayed

Same as above

4. Presumable cause

Mistake in SW7-1 setting
Due to forgetting to turn OFF

SW7-1 after indoor operation

check)

Note:

Indoor operation check/drain pump check mode
If the power is ON after SW7-1ON, indoor operation check/drain pump check mode can be established.

1) When the communication between remote control and indoor PCB is established 15 seconds after power ON, it goes to
indoor operation check.

2) When the communication between remote control and indoor PCB is not established, it goes to drain pump check.

(CnB connector should be open before power ON.)

Is SW7-1

on the indoor control

PCB ON?

E19 occurs when the

power ON

NO

YES

Error code

Remote control:
7-segment display:

LED Green Red

Indoor

Outdoor

Content

– 98 –

'14 • KX-SM-202

E20

–

Indoor fan motor

rotation speed anomaly

(In case of FDT, FDTC, FDTW, FDTS, FDU, FDUM, FDK, FDUT71, FDFW series)

Keeps ashing

1-time ash

Keeps ashing

Stays OFF

1. Applicable model

5. Troubleshooting

FDT, FDTC, FDTW, FDTS,
FDU, FDUM, FDK, FDUT71,
FDFW series only

Diagnosis Countermeasure

NO

YES

YES

Does any

foreign matter intervene

in rotational area of fan

propeller?

Is DC280V

detected between -(-) of

fan motor connector

CNM?

Does it become normal?

Is the fuse F3(F4) or F202 blown?

Does the fan

rotate smoothly when turned

by hand?

YES

NO

NO

NO

YES

NO

YES

Reset the power supply and restart.

(1) (2)

Note (1) () for GND
(2) Valve in ( ) are for the model
FDFW and FDK

Remove foreign material.

Replace the fan motor.

Check power supply
voltage.

Replace fan motor and

power PCB.

Replace fan motor. (If the

anomaly persists after

replacing the fan motor,
replace the indoor control
PCB.)

Malfunction by temporary
noise

2. Error detection method

Detected by rotation speed of
indoor fan motor

3. Condition of error displayed

When the actual fan rotation
speed does not reach to the

speed of [required speed

─50(FDU:-500)min-1] after 2
minutes have been elapsed since
the fan motor rotation speed
command was output, the unit
stops by detecting indoor fan

motor anomaly.

4. Presumable cause

• Indoor fan motor anomaly

• Foreign matter at rotational

area of fan propeller

• Fan motor anomaly

• Dust on control PCB

• Blown fuse

• External noise, surge

Note:

Error code

Remote control:
7-segment display:

LED Green Red

Indoor

Outdoor

Content