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)