Mitsubishi Heavy Industries FDT45KXE6A, FDT112KXE6A, FDTC28KXE6A, FDTC22KXE6A, FDTC45KXE6A Service Manual

...

Manual No. '09·KX-SM -128

INVERTER DRIVEN MULTI-INDOOR UNIT CLIMATE CONTROL SYSTEM

SERVICE MANUAL

Alternative refrigerant R410A use models

(OUTDOOR UNIT)

• Single use (Used also for combination) FDC335KXE6-K, 400KXE6, 450KXE6, 504KXE6, 560KXE6, 560KXE6-K, 615KXE6, 680KXE6

• Combination use FDC753KXE6, 800KXE6, 850KXE6, 900KXE6, 960KXE6, 1010KXE6, 1065KXE6, 1130KXE6, 1180KXE6, 1235KXE6, 1300KXE6, 1360KXE6

(Heat pump type)

KX6 series

FDT28KXE6A

36KXE6A 45KXE6A 56KXE6A 71KXE6A

90KXE6A 112KXE6A 140KXE6A 160KXE6A

FDUM22KXE6

28KXE6 36KXE6 45KXE6 56KXE6 71KXE6

90KXE6 112KXE6 140KXE6

FDUH22KXE6

28KXE6

36KXE6

FDTC22KXE6A

28KXE6A 36KXE6A 45KXE6A 56KXE6A

FDQS22KXE6

28KXE6 36KXE6 45KXE6 56KXE6

FDU71KXE6

90KXE6 112KXE6 140KXE6 224KXE6 280KXE6

FDFU28KXE6

45KXE6

56KXE6

71KXE6

FDTW28KXE6

45KXE6 56KXE6 71KXE6

90KXE6 112KXE6 140KXE6

FDK22KXE6

28KXE6

36KXE6

45KXE6

56KXE6

71KXE6

FDTQ22KXE6

28KXE6 36KXE6

FDFL28KXE6

45KXE6 71KXE6

FDTS45KXE6

71KXE6

FDE36KXE6A

45KXE6A 56KXE6A

71KXE6A 112KXE6A 140KXE6A

(INDOOR UNIT) -KX6 series

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

updated November 19, 2009

CONTENTS

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

1.1 Wired remote controller (Option parts) ......................................................1

1.2 Operation control function by the indoor controller ...................................2

1.3 Operation control function by the remote controller .................................. 8

1.4 Operation control function by the outdoor controller .................................9

2 SYSTEM TROUBLESHOOTING PROCEDURE ............................................. 45

2.1 Basics of troubleshooting ........................................................................ 45

2.2 Explanation of troubleshooting ................................................................46

2.3 Contents of troubleshooting ....................................................................47

2.4 Outdoor unit control PCB replacement procedure ................................ 101

2.5 Inverter PCB replacement procedure .................................................... 103

3 ELECTRICAL WIRING ..................................................................................107

3.1 Indoor unit .............................................................................................107

3.2 Outdoor unit ..........................................................................................129

4 PIPING SYSTEM ............................................................................................130

5 APPLICATION DATA .................................................................................... 131

5.1 Installation of indoor unit ........................................................................... 131

(a)

Ceiling cassette-4 way type (FDT) ..................................................... 132

(b)

Ceiling cassette-4 way compact type (FDTC)....................................137

(c)

Ceiling cassette-2 way type (FDTW) ................................................. 142

(d)

Ceiling cassette-1 way type (FDTS) .................................................. 145

(e)

Ceiling cassette-1 way compact type (FDTQ) ................................... 148

(f)

Duct connected-High static pressure type (FDU) .............................. 151

(g)

Duct connected-Middle static pressure type (FDUM) ........................ 157

(h)

Duct connected (Ultra thin)-Low static pressure type (FDQS) ........... 160

(i)

Wall mounted type (FDK) ..................................................................163

(j)

Ceiling suspended type (FDE) ...........................................................166

(k)

Floor standing (with casing) type (FDFL) ........................................... 169

(l)

Floor standing (without casing) type (FDFU) ..................................... 172

(m)

Duct Connected-Compact and Flexible type (FDUH) ........................175

5.2 Electric wiring work instruction .................................................................. 178

5.3 Installation manual of wired remote controller (Option parts) ...................184

5.4 Installation of outdoor unit .........................................................................188

5.5 Instructions for installing the branch pipe set ............................................211

– 1 –

1. OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

1.1 Wired remote controller (Option parts)

The gure below shows the remote controller with the cover opened. Note that all the items that may be displayed in the liquid crystal

display area are shown in the gure for the sake of explanation.

Characters displayed with dots in the liquid crystal display area are abbreviated.

Pull the cover downward to open it.

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

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

Installation of remote control

DO NOT install it on the following places in order to avoid malfunction. (1) Places exposed to direct sunlight

(2) Places near heat devices (3) High humidity places

(4) Hot surface or cold surface enough to generate condensation (5) Places exposed to oil mist or steam directly (6) Uneven surface

Cover

This button is used to fix the setting. This button is used to set the silent mode.

– 2 –

1.2 Operation control function by the indoor controller

(1) Operations of functional items during cooling/heating

Cooling Heating

Dehumidify

Fan

Operation

Functional item

Thermostat

OFF

Thermostat

OFF

Hot start (Defrost)

Compressor 4-way valve Outdoor fan Indoor fan Louver motor Drain pump

(4)

















/



(2)







(2)





/











/

(2)



() ()





/



/ / /

Thermostat ON:



Thermostat OFF: 

(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 by the indoor unit function setting of the wired remote controller.

(2) Dehumidifying operation

(a) When the humidity sensor is not provided (Models other than FDT Series) return air thermistor [Th

I-A (by the remote controller when the remote control sensor is enabled)] controls the indoor

temperature environment simultaneously.

Operation is started in the cooling mode. When the difference between the return air thermistor 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 fan tap.

2) If the suction air temperature exceeds the setting temperature 3°C or more during defrosting operation, the indoor fan tap is raised by one tap. That tap is retained for 3 minutes after changing the indoor fan tap.

If the thermostat OFF is established during the above control, the indoor fan tap at the thermostat ON is retained so

far as the thermostat is turned OFF.

After stopping the cooling operation, the indoor unit continues to run at Lo for 15 seconds.

(b) When the humidity sensor is provided (FDT Series only) [Optional]

1) Operation starts in the cooling mode, and the target relative humidity is determined based on the setting temperature. If the humidity detected by the humidity sensor becomes lower than the target relative humidity, the indoor unit fan tap is retained.

Anything other than 1) above is same as the item (a) above.

(3) Timer operation

(a) 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 clock timer

setting, the remaining time is displayed with progress of time in the unit of hour.

(b)

OFF timer Time to turn OFF the air-conditioner can be set in the unit of 10 minutes. (c) ON timer Time to turn ON the air-conditioner can be set. Indoor temperature can be set simultaneously. (d) Weekly timer Timer operation (ON timer, OFF timer) can be set up to 4 times a day for each weekday. (e) 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

– 3 –

(4) Remote controller display during the operation stop

(a) “Centralized control ON” is displayed always on the LCD under the “Center/Remote” and “Center” modes during the

operation stop (Power ON). This is not displayed under the “Remote” mode.

(b)

If this display is not shown under the “Center/Remote” mode, check if the indoor unit power switch is turned on or not.

(5) Hot start (Prevention of cold draft during heating)

At the startup of heating operation, at resetting the thermostat, during defrosting operation and at returning to heating, the indoor fan is controlled by the indoor heat exchanger temperature (detected with Th

I-R) to prevent the cold draft.

Judgment by heating start thermostat

Normal condition/Set airflow volume

Thermostat OFF Thermostat ON

Compressor OFFCompressor ON End of defrosting

Heat exchanger temp. 35˚C or higher, or after 7 minutes Heat exchanger temp. 35˚C or higher, or after 7 minutes

Defrosting start

Fan Lo

Set airflow volume

Indoor heat exchanger temp. (˚C)

35 45

25 35

Indoor heat exchanger temp. (˚C)

Set airflow volume

Fan OFF

25 35

Set airflow volume

Fan OFF

Indoor heat exchanger temp. (˚C)

Fan

（1）

Note (1) Heating preparation is displayed during the hot start (when the compressor is operating and the indoor fan does not provide the set airow volume).

(6) Hot keep

Hot keep control is performed at the start of the defrost control. (a)

Control

1) When the indoor heat exchanger temperature (detected with Th

I-R1 or R2) drops to 35°C or lower, indoor fan is

changed to the lower tap at each setting.

During the hot keep operation, the louver horizontal control signal is transmitted. (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)

Fan control during the heating thermostat OFF

When the heating thermostat is turned OFF, the setting of the fan control is selectable with using the indoor function of wired remote controller [Heating fan control]. (a)

Low speed (Factory default)

If the indoor heat exchanger temperature drops 35°C or lower with the heating thermostat OFF, the indoor fan operate at

the lower speed tap at each setting.

(b)

Set airow volume

Even if the indoor heat exchanger temperature drops 35°C or lower with the heating thermostat OFF, the indoor fan

continues to run at the set airow volume.

(c)

Intermittent operation

If the indoor heat exchanger temperature drops 35°C or lower with the heating thermostat OFF, the indoor fan operates at

the lower speed tap at each setting and, when the indoor heater exchanger temperature drops 25°C or lower, the indoor fan stops for 5 minutes. Then the fan runs at the slow speed tap for 2 minutes, and the judgment is made by the thermostat.

(d)

Stop

If the indoor heat exchanger temperature drops 35°C or lower with the heating thermostat OFF, the indoor fan is turned

OFF. The same applies also when the remote controller sensor is effective.

– 4 –

(8) Filter sign

As the operation time (when ON/OFF switch is at ON) accumulates to 180 hours (1), “Filter cleaning” is displayed on the

remote controller. (This is also 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 controller “Filter sign setting”. (It is set at 1 at the

shipping from factory.)

Filter Sign Setting

Setting 1

Setting 2

Setting 3

Setting 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)

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.

(9) Auto swing control [Applicable model: FDT, FDTC, FDTW, FDTS, FDTQ (Excepted duct panel model) FDK

and FDE]

(a)

Louver control

(i) Press the [Louver] button to operate the swing louver when the air conditioner is operating.

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

(ii) 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

“Louver stop” for 5 seconds and then the swing louver stops.

(iii)

Louver operation at the power on

The louver swings one time automatically (without operating the remote controller) 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 “Auto wind

direction” display 3 seconds later.

(b) Automatic louver level setting during heating

While hot start operation and heating thermostat OFF operation, the louver keeps the level position (In order to prevent

the cold draft) whether the auto swing switch is operated or not (auto swing or louver stop), The louver position display

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

(c)

Louver-free stop control

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

the louver motor stops when it receives the stop signal from the remote controller. If the auto swing signal is received

from the remote controller, the auto swing will start from the position where it was before the stop.

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

control setting” in the same way.

(10) Compressor inching prevention control

(a) 3-minutes timer

When the compressor has been stopped by the thermostat, remote controller operation switch or anomalous condition, its

restart will be inhibited for 3 minutes. However, the 3-minute timer is invalidated at the power on.

(b)

3-minutes forced operation timer

• Compressor will not stop for 3 minutes after the compressor ON. However, it stops immediately when the thermostat is

turned OFF by the stop command by means of the ON/OFF switch or the change of operation mode.

•

If the thermostat is turned OFF during the forced compressor operation in heating mode, the louver position (with the

auto swing) is returned to the level position.

Note (1) The compressor stops when it has entered the protective control.

– 5 –

(11) Drain motor (DM) control [Applicable type: FDT, FDTC, FDTW, FDTS, FDTQ, FDUM, FDQS and FDU90～140]

(a) Drain motor (DM) start operation at the same time when compressor ON at cooling and dehumidifying mode and

keeps operating for 5 minutes after operation stop, the anomalous stop, thermostat OFF and switching from cooling or dehumidifying operation to fan or heating operation.

Stop

(1)

Indoor unit operation mode

Control A

Control B

Compressor ON

Compressor OFF

Cooling

Dehumidifying

HeatingFan

(2)

Note (1) Including the stop from cooling, dehumidifying, fan and heating operation 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.

2)

Thedrainmotor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condition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)

Drain motor (DM) interlock control (i) Start conditions Depending on the function setting of the remote controller, the drain motor is turned ON under either one of the

following conditions.

1) During heating operation (Both the thermostat ON/OFF)

2) During heating operation (Both the thermostat ON/OFF) + Fan operation

3) Fan operation (ii) Stop conditions The drain motor is turned OFF 5 minutes after the stop of operatio

ns 1) to 3) above.

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

(a) If the power is turned on when the dip switch (SW7-1) on the indoor PCB is ON state, 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controller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 controller 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 controller

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 controller.

(d) Drain pump test run mode When

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

by the microcomputer of indoor unit become ineffective.

(13)

Indoor heat exchanger anti-frost (anti-frost control)

Thermostat OFF control

1) Thermostat is turned OFF depending on the temperature detected with the heat exchanger sensor (Th

I-R1, R2)

during “Cooling” and “Dehumidifying” operations.

1.0

Forced thermostat OFF

Thermostat ON OK

Heat exchanger temperature

5-min timer

Temperature drop Temperature rising

10°C

2) For 4 minutes after the thermostat ON, the forced thermostat OFF control for the anti-frost protection is not effective. a) When temperatures detected by the heat exchanger sensors Th

I-R1 and R2 are higher than the anti-frost protection

temperature at 4 minutes after the thermostat ON, the detection starts from the state of thermostat ON.

3) I

f the temperature detected with the heat exchanger sensor Th

I-R1 or R2 has stayed below the anti-frost protection

temperature(-0.5°C)continuously for5minutesafter 4minutesofthe thermostatONoperation,then thethermostatis

turned OFF forcibly.

The thermostat will be turned ON if temperatures detected by

I-Ra and R2 picked up in the thermostat ON range.

4) “Anti-frost” signal is sent to the outdoor unit.

– 6 –

(14) Anomalous fan motor (FDT and FDK only)

Fan motor will be stopped with displaying “E16”, if it has detected the revolutions of 200 rpm or less continuously for 30

seconds at a rate of 4 times within 60 minutes, after starting the motor.

(15)

High ceiling control [Applicable type: FDT, FDTC, FDTW, FDTS and FDE]

When the indoor unit is installed at a high ceiling, the airow volume mode control can be changed with the indoor function of

wired remote controller “High ceiling setting”.

Setting Standard (Shipping) High Ceiling 1 High Ceiling 2

Remote controller setting Hi Me Lo Hi Me Lo Hi Me Lo

Fan speed Hi Me Lo UHi1

Hi Me UHi2 Hi Me

Note (1) It is set at Standard at the shipping from factory.

(2) At the hot start, heating thermostat OFF, or other, the indoor fan operate at the slow speed tap at each setting.

(16) Hot start

Indoor fan motor control is performed at the start of heating operation.

(a)

When the temperature detected with the indoor heat exchanger thermistor (Th

I-R1 or ThI-R2) drops 35°C or lower, it

control the fan with AC motor: Lo and DC motor: ULo.

(b)

When the heat exchanger thermistor detects 45°C or higher with the fan running at Lo/ULo, it returns to the set airow

volume.

Set airflow volume

Lo/ULo

35°C 45°C

Heat exchanger thermistor temp. (Th

I-R1 or R2)

(c) On the indoor unit of which the thermostat has been turned OFF during heating operation, the fan is turned OFF if the

heat exchanger thermistor temperature (Thi-R1 or Thi-R2) drops 25°C or lower.

(17)

Detection room temperature compensation during heating

With the standard specication, the compressor is turned ON/OFF based on the setting temperature of thermostat. However,

when the thermostat OFF is likely to occur earlier because the unit is installed in a condition that warm air tends to accumulate

near the ceiling, the setting can be changed by using the indoor function of wired remote controller “Heating room temperature

compensation”. Since the compressor is turned ON/OF at one of the setting temperature at +3, +2 or +1°C, the feeling of

heating can be improved. However, the upper limit of setting temperature is 30°C.

Operation

Setting temperature

Room temp. (deg)

–1

Stop

Standard

Compressor

Operation

Setting temperature

Room temp. (deg)

+4+2

Stop

With setting at +3°C

Compressor

(18) Return air temperature compensation

This is the function to compensate a difference between the detected temperature of the Return air thermistor and the measured

temperature after installation of unit.

(a)

It is adjustable in the unit of 0.5°C by using the indoor function of wired remote controller “Return air thermistor

compensation”.

• +1.0°C, +1.5°C and +2.0°C

• −1.0°C, −1.5°C and −2.0°C

(b) Since the compensated temperature is transmitted to the remote controller and the outdoor unit, it is controlled with the

compensated temperature.

Note (1) Compensation of detection temperature is effective for the indoor unit sensor only.

(19) External control (Remote display)/Remote operation

Always connect the wired remote controller. Otherwise, you cannot perform the remote operation.

(a)

Output for external control (remote display)

(Optional remote RUN/STOP monitor kit can be utilized.)

Following

output connectors (CNT) are provided on the indoor control PCB. Connect the remote RUN/STOP monitor kit

and pick up respective dry contact signal.

•

Operation output

: Outputs DC12V relay drive signal during operation.

– 7 –

•

Heating output

: Outputs DC12V relay drive signal during heating operation.

•

Compressor ON output

: Outputs DC12V relay drive signal when the compressor is operating.

•

Error output

: When any anomalous condition occurs, it outputs DC12V relay drive signal.

(b)

Remote operation input

Remote operation inputs (switch input, timer input) connectors (CnT) are provided on the indoor control PCB.

However, the remote operation by the CnT is not effective when “Center mode” is selected with the air-conditioner.

(i)

At the shipping from factory [Indoor function of wired remote controller “External input selector” is set at the level input.]

• Startup at the input signal to CnT OFF  ON [Edge input] … Air-conditioner ON

• Stop at the input signal to CnT ON  OFF [Edge input] … Air-conditioner OFF

*ON

ONON

OFF OFF

OFF

OFF OFF

ONON

OFF

*ON

CnT input

Air-conditioner A

Air-conditioner B

(ii) When the setting is changed to the pulse input at site using the indoor unit function of wired

remote controller “External input selector”

It becomes effective only when the input signal to CnT is changed OFF

➝

ON and the air-conditioner operation [ON/

OFF] is inverted.

OFF

OFF OFF

OFF

CnT input

Air-conditioner A

Air-conditioner B

This emergency stop signal is used to stop all indoor unis connected to the same outdoor unit in emergency.

1) The emergency stop control becomes effective if the emergency stop control setting is changed to “Valid” from the

wired controller.

If the emergency stop [E-63] signal is received from outdoor unit, it is transmitted to the remote controller and

makes stop.

(d)

Fresh air processing operation input

1) If indoor unit controller receive fresh air processing operation signal (*1) or fresh air processing stop signal from

remote controller, it output ON signal or OFF signal from CnD connector respectively.

*1.

Operation switch ON at interlock setting and ventilation switch ON at non-interlock setting.

2) Output relay is DC12V option and maximum relay load is LY2F (OMRON).

In case of interlock setting, if either of indoor units connected to one remote controller is in the state of anomalous stop,

the fresh air processing unit connected to that indoor unit cannot be operated. Other processing units connected to the

indoor units operating normally can be operate.

n case of non-interlock setting, processing unit can start ventilation even though the connected indoor unit is in

anomalous stop.

4) In case of interlock setting if indoor unit stops, processing unit also stop.

5) In case of interlock setting if indoor unit stops with anomalous stop, processing unit also stop.

6) If indoor unit is started or stopped from center console, processing unit can start or stop in case of interlock setting,

but it keep stopping in case of non-interlock setting.

Interlock or non-interlock can be set only on the remote controller.

(20) Dip switch function

Model capacity selection with SW6 0 : OFF, 1 : ON

Model P22 P28 P36 P45 P56 P71 P80 P90 P112 P140 P160 P224 P280 SW6-1 0 1 0 0 0 0 1 0 1 0 1 0 1 SW6-2 0 0 1 0 1 0 0 1 1 0 0 1 1 SW6-3 0 0 0 1 1 0 0 0 0 1 1 1 1 SW6-4 0 0 0 0 0 1 1 1 1 1 1 1 1

Note (1) ON marked with * means ON by a remote

controller switch or other.

– 8 –

1.3 Operation control function by the remote controller

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

Dehumidifying

Cooling Fan Heating

(2) [CPU reset]

When the “CHECK” and “GRILL” buttons on the remote controller are pressed at the same time, this function is activated. This function is same as power supply reset.

(3)

[Power failure compensation function]

• This function becomes effective when “POWER FAILURE COMPENSATION SET” is valid by setting the remote controller functions.

•

The remote controller's status is always stored in memory, and after recovery of power, operation is resumed according to

the memory contents. However the auto swing stop position and timer mode are cancelled, but the weekly timer setting is restored with the holiday setting through all weekdays.

By resetting the clock and cancelling the holiday setting for each weekday after recovery of power, weekly timer setting

becomes effective.

•

Contents stored in memory for power failure compenstion are as follows.

Note (1) Item

➅➆

and ➇ are stored in memory regardless of whether the power failure compensation setting is valid or invalid, and silent mode setting is

cancelled regardless of whether the power failure compensation setting is valid or invalid.

➀

Running or Stopping status just before power failure

If it had been operating under OFF timer mode or simple timer mode, memorzed status is as stopping (At the

recovery of power, the timer mode is cancelled but weekly timer setting is changed to the holiday setting through all weekdays

➁

Operation mode

➂

Fan speed mode

➃

Room temperature setting

➄

Louver auto swing/stop

However

, the stop position (position 4) is cancelled and is becomes the level position (position 1).

➅

“Remote

control function items”, set with the remote controller function setting (“Indoor unit function items” are

stored in the inoor unit's memory.)

➆

Upper limit value and lower limit value set by temperature setting control.

➇

Clock timer setting and weekly timer setting (Other timer settings are not sotred in memory).

[Parts layout on remote controller PCB]

X Y

SW2

SW1

親

子

SW1

SW2



Control selector switch (SW1)

Switch Function

SW1

Master remote controller

Slave remote controller

Note (1) SW2 is not normally used, so do not change the selection.

1.4 Operation control function by the outdoor controller

(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 [SV13]

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 controller command

Overheating control response

Outlet temperature control response

Overheating Control Response

Fully open 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

Overheating control response

Opening angle control

Fully closed / Fully open

Opening angle control

Remote controller command

Intermittent operation

→  / 

/ 



→ 



/ 

/ / 

 /



/ 



/ 

Inverter cooling fan [FMC1, 2]

/ / / / / / 

/ 



/ 



/ 



/ 



Crankcase heater [CH1,2]

/  /  /  /  /  /  / 







Magnetic contactor CM1 [52X1]

 /

Magnetic contactor CM2 [52X2]



Solenoid valve [SV1]

/    /   /  / 

Solenoid valve [SV2]

/    /   /  / 

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.

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

(a) Starting compressor

(i) Compressor starting order (2 compressors speciﬁcation)

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 thermostat ON, the next compressor will start sequentially, and nally maximum 4 compressors ( in case of combi-

nation use) will start simultaneously.

Single use

The range of frequency for each compressor corresponding to the heat load is shown in below mentioned table.

(The table shows the case that CM1 starts rst. If CM2 starts rst, the frequency of CM2 should be applied that

of CM1 shown in heat load zone 1 instead.)

Following tabel is shown the case that the maximum compressor frequency is 120Hz.

Note (1) Value in ( ) are for the models FDC615, 680KXE6

2) Combination use

The range of frequency for each compressor corresponding to the heat load is shown in below mentioned

table. (The table shows the case that CM01 starts rst. If CM11 starts rst, the frequency of CM11 should be

applied that of CM01 shown in heat load zone 1 instead.)

Note (1) Value in ( ) are for the models FDC1180~1360KXE6

(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.

In case of combination use, the starting order of CM01(CM11) and CM02(CM12) will be changed over on each

occation when the master unit or slave unit stops all independently.

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

(Reference)

Change in number of compressors operating

Note (1) Value in ( ) are for the models FDC615, 680KXE6 and FDC1180~1360KXE6

(2) After recovery of power blackout, starting order of compressor is always CM01of master unit.

Model

FDC335

680

FDC735~1360

Starting Order of Outdoor Units Starting Order of Compressors

CM 1 → CM 2 → CM 1

Master → Slave → Master CM 1 → CM 2 → CM 1

−

CM1

Heat load zone

CM2

0Hz 0Hz

20~112Hz (22~92Hz)

0Hz

42 (34)~120Hz 42 (34)~120Hz

Heat load zone

Master unit Slave unit

CM01 CM02 CM11 CM12

0Hz 0Hz 0Hz 0Hz

20~112Hz (20~92Hz)

0Hz 0Hz 0Hz

42~112Hz (34~92Hz)

0Hz

42~112Hz (34~92Hz)

0Hz

42~120Hz (34~120Hz) 42~120Hz (34~120Hz) 42~120Hz (34~120Hz) 42~120Hz (34~120Hz)

1-Compressor

2-compressors

4-compressors

80Hz

(60Hz)

112Hz

(92Hz)

80Hz × 2

(66Hz × 2)

112Hz × 2

(92Hz × 2)

(3) Starting control of the compressor (Master unit/Slave unit)

According to the elapsed time after power ON and to the number of start-up, the starting control method of compressor is

shown in following table. However during the defrost control, oil return control and oil equalization control, the starting control

method of compressor is depended on that of the each control.

(a)

4-way valve switching safeguard (Master unit/Slave unit)

At starting, the inverter compressor (CM1, CM2) is operated under following conditions regardless of the decision frequency.

(i)

0-20Hz operation

It is operated in the range of 0-20Hz. However during this operation, the compressor protective controls like current safe

control, high pressure control, discharge pipe temperature control, low pressure control, power transistor temperature control,

under-dome temperature control and compression ratio protective control are not performed.

(ii)

25-40(48)Hz opearation

The maximum frequency is determined by the temperature detected with the outdoor air temperature thermistor (Tho-A).

In case of 0°C or lower of Tho-A: It starts to increase the frequency up to 48Hz as maximum frequency and

when the frequency reaches 48Hz, it stops.

In case of higher than 0°C of Tho-A: It starts to increase the frequency up to 40Hz as maximum frequency and.

when the frequency reaches 40Hz, it stops. However during this operation, if the starting conditions of the com-

pressor protective controls like current safe control, high pressure control, discharge pipe temperature control,

low pressure control, power transistor temperature control, under-dome temperature control or compression ratio

protective control is satised, this control ends and it is controlled according to such protective control satised with. And if the compressor frequency is determined and this protective control is cancelled, it returns to the nor-

mal operation.

(b)

Compressor protective start control (Master unit/Slave unit)

The compressor frequency is controlled regardless of the target frequency.

Up to 1minutes 45 seconds after the compressor starts, it is operated at 20Hz.

2) When 1minutes 45 seconds has elapsed after the compressor starts, it is operated at the frequency by compressor

potective start control.

(c)

Compressor protective start control "A" according to the crankcase heater ON time (Master unit/Slave

unit)

If it is the 1st startup after 45 minutes of the cumulative crankcase heater ON time has elapsed since power ON or if it is the subsequent startup after the compressor has stopped for 45 minutes or more since power ON, it starts operation accord-

ing to this control.

After 4-way valve switching safeguard, inverter frequency is set at 20Hz. And during reducing frequency to 20Hz

after 4-way valve switching safeguard, if the time for reaching to 20Hz is elasped 1 minutes after startup, it is set at

the maximum frequency after 1 minute elasped (20Hz+5Hz).

During the period of 15 minutes after the inverter frequency reaches to 10Hz (the frequency to complete startup), the

maximum inverter frequency will be increased from 20Hz by 5Hz per minute.

If the compressor stops within the period of 15 minutes after startup, and when the compressor starts again, the maxi-

mum inverter frequency is increased from 20Hz by 5Hz per minute during the cumlative period of 15 minutes under

this control after the initial startup.

Conditions Starting method

① The 1st startup after 45minutes or more has elapsed since

power ON, or the subsequent startup after the compressor has been stopping for 45 minutes or longer with keeping the power ON.

After 4-way valve switching safeguard, "compressor protective start control A" will be perfomed according to the crankcase heater ON time. (See followings)

② The 1st startup after less than 45 minutes has elasped

since power ON

After 4-way valve switching safeguard, "compressor protective start control B" will be perfomed according to the crankcase heater ON time. (See next page)

③ The startup other than ① and ② mentioned above.

After 4-way valve switching safeguard, "compressor protective start controls" will be perfomed.

4) When the under-dome temperature (detected by Tho-C) exceeds 20°C and the under-dome superheat is 15degC, the

compressor protective start control "A" is cancelled and the inverter frequency will be increased by 5Hz per 25 seconds.

(d)

Compressor protective start control "B" according to the crankcase heater ON time (Master unit/Slave

unit)

If it is the 1st startup after the cumulative crankcase heater ON time has elapsed less than 45 minutes since power ON

1) After 4-way valve switching safeguard, inverter frequency is set at 20Hz. And during reducing frequency to 20Hz

after 4-way valve switching safeguard, if the time for reaching to 20Hz is elasped 1 minutes after startup, it is set at

the maximum frequency after 1 minute elasped (20Hz).

2) During the period of 18 minutes after the inverter frequency reaches to 10Hz (the frequency to complete startup op-

eration), the maximum inverter frequency will be increased from 20Hz by 5Hz per 2 minute.

From 18 minutes to 24 minutes after startup, the maximum inverter frequency will be increased by 5Hz per 1 minute,

and this control will end when 24 minutes is elapsed after startup.

After this control ends once, if it is the 2nd startup or the period of 45 minutes after th power ON is elapsed, this con-

trol will be shifted to the compressor protective start control "A".

If the compressor stops within 24 minutes after startup, and when the compressor starts again, the compressor protective

start control "B" is performed during the cumlative period of 24 minutes after the initial startup. However when the period

of 45 minutes has elapsed since compressor stopped, the control is shifted to the compressor protective start control "A".

6) When the under-dome temperature (detected by Tho-C) exceeds 20°C and the under-dome superheat is 15degC, the

compressor protective start control "B" is cancelled and the inverter frequency will be increased by 5Hz per 25 sec-

onds.

(4) Solenoid valve (SV6,7) control for oil return from oil separator (Maste unit/Slave unit)

(a) When the compressor starts, the following solenoid valve for corresponding compressor is opened respectively.

(b) SV6, SV7 is kept open for the period of 3 minutes after 4-way valve switching safeguard control and compressor protective

control start.

(c)

If the compressor frequency is 80Hz (68Hz) or higher, SV6,7 opens, and if the compressor frequency is 76Hz(64Hz) or

lower, it closes.

Note (1) Value in ( ) are for the models FDC615, 680KXE6 and FDC1180~1360KXE6

(d) If the compressor stops after SV6, 7 opens, SV6, 7 remains open for 3 minutes and 10 seconds, then closes.

76Hz

(64Hz)

80Hz

(68Hz)

Actual compressor frequency (Hz)

SV6, 7 open

SV6, 7 closed

Run

command

OFF

Stop

3 minutes

15 sec.

OFF

Stop

76Hz or

lower

80Hz or higher

3 minutes

10 seconds

Solenoid valve

(SV6, 7)

Compressor

20Hz

Compressor Starts

Compressor

CM1 CM2

Solenoid valve

SV6 SV7

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

(a) DC fan motor control

The outdoor fan is controlled from 0th speed to 4th speed, and set the standard speed according to the model and operation

mode.

Under normal condition, 1st speed and 4th speed is standard, and under each condition the stepless fan control between 1st

speed and 4th speed is performed.

(b)

Outdoor fan speed and fan motor rotation speed

(d) DC fan motor startup control

①

When the outdoor fan starts after stopping, the startup fan control is performed by checking the fan speed.

②

the rotating direction of the stopping fan, either FMo1 or FMo2, is reverse and its speed is 700min

-1

or higher, the

both fans cannot be started.

③

the rotating direction of the stopping fans, both FMo1 and FMo2, are reverse but its speed is less than 700min

-1

for

3 seconds continuously, the fan can be started.

④

During the period of 5 seconds after 52C1 is turned ON, the outdoor DC fan is prohibited to start.

Fan tap

FDC335, 400

Cooling

0th speed

1st speed

2nd speed

3rd speed 4th speed

0 0

0 160 960

0 160 400 160 960

0 0

0 160 960

0 160 400 160 960

Heating

FDC450

Cooling

0 0 0

160

1080

0 160 400 160

1080

0 0 0

160

1080

0 160 400 160

1080

Stop 1-unit operation min. speed 1-unit operation max. speed 2-unit operation min. speed 2-unit operation max. speed

Heating Remarks

Unit: min

-1

Fan tap

0th speed 1st speed

2nd speed

3rd speed 4th speed

FDC504〜680

Cooling

0 0 0

160

1140

0 160 400 160

1140

0 0 0

160

1140

0 160 400 160

1140

Stop 1-unit operation min. speed 1-unit operation max. speed 2-unit operation min. speed 2-unit operation max. speed

Heating Remarks

Unit: min

-1

(6) Compressor pre-start control (Master unit/slave unit)

(a) The following control is performed when the compressor ON conditions are established.

(i) Pre-start control when the operation mode is same as previous operation mode:

1) In case of "Cooling /Dehumidifying" mode, 4-way valve is turned OFF. In case of "Heating" mode, 4-way

valve

is turned ON.

However

if the operation mode is same as previous operation mode and 4-way valve is retaing prescribed condi-

tion, the control status of 4-way valve is unchanged.

Solenoide valve SV6 and SV7 are turned ON.

3) The opening degree of EEVH1, 2 for heating and EEVSC for subcooling coil are set to the initial opening degree

mentioned in following table. The expansion valves EEVH1, 2 are operated rst, and after those operations are

completed, the expansion valve EEVSC will be operated.

Note (1) Expansion valves of master unit and slave unit are operated respectively.

4) Fan motors FMo1, FMo2 and compressor start 15 seconds after the compressor ON conditions are satised.

Cooling  Heating

Heating

Cooling

1,2

OFF

20S

SV6

EEVH1,2 470

EEVSC

CM1 ON

CM2 ON

3 minutes

Open/close control

Opening degree control

Initial opening degree

Full-close or 100 pulse

Opening degree control

Full-close

OFF

Min. of 3 minutes 15 seconds 6 seconds

Compressor stop Compressor start

Starting conditions are satisfied

Operation mode

Cooling EEVH1, 2 EEVSC

Name

Item

470

(Unit: Pulse)

Heating

(7) Crankcase heater control (Master unit/Slave unit)

(a) Crankcase heater ON (power on) and OFF (power off) are controlled with the under-dome temperature thermistor.

(b) Crankcase heater CH1 is turned ON, when the under-dome temperture (Tho-C1)

(SST)+20°C

(c)

Crankcase heater CH1 is turned OFF, when the under-dome temperture (Tho-C1)

(SST)+25°C

(d)

Crankcase heater CH2 is turned ON, when the under-dome temperture (Tho-C2)

(SST)+20°C

(e)

Crankcase heater CH2 is turned OFF, when the under-dome temperture (Tho-C2)

(SST)+25°C

(Note) SST: Low pressure saturated temperature detected with low pressure sensor (LPS)

(f) Crankcase heater CH1 is turned OFF, when the under-dome temperature (Tho-C1)

－

40°C and CM1 is ON

(g) Crankcase heater CH2 is turned OFF, when the under-dome temperature (Tho-C2)

－

40°C and CM2 is ON

(Note) (f) and (g) are the protection for thermistor (Tho-C1, -C2) breakage

Heating  Cooling

Cooling

Heating

FMo1,2

OFF

20S

SV6

EEVH1,2

EEVSC

CM1

CM2

3 minutes

Open/close control

Initial opening degree

Full-close

Opening degree control

Full-open

OFF

15 sec. 1 minute 45 secondsMin. of 3 minutes

Compressor stop

Compressor start

Starting conditions are satisfied

(8) Defrrosting (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.

When the cu mulative operation time

of the compressor becomes 33 minutes after co mp le ti on of pr ev io us defrost

operation, or it becomes 33 minutes after

heating operation starts.

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) After all of the above conditions are satised, and

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.

(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

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.

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

higher

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.

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

Without J15 Cold region specification

With J15

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

(9) Protective control

(a) Discharge pipe temperature control (Master unit/slave unit)

(i)

If the discharge pipe temperature (detected with Tho-D1, D2) exceeds the set value, it makes the compressor capacity control performed and the solenoid valves SV1, 2 (for cooling down the compressor) open according to the compressor Hz in order to suppress the discharge pipe temperature rising.

1) Compressor capacity control

2) Solenoid valve (SV1, 2) control for cooling down compressor

< ON conditions >

①

In the zone

A: SV1 is turned ON when Td1

115°C. SV2 is turned ON when Td2

115°C.

②

In the zone B: SV1 is turned ON when

Td1

110°C. SV2 is turned ON when Td2

110°C.

< OFF conditions>

①

In the zone

A: SV1 is turned OFF when Td1

108°C. SV2 is turned OFF when Td2

108°C.

②

In the zone B: SV1 is turned OFF when

Td1

103°C. SV2 is turned OFF when Td2

103°C.

(ii)

Discharge pipe temperature control and Error display

1) W

hen the discharger temperature exceeds 130°C or higher for 2 seconds continuously, it makes the compressor stopped. And when the discharge pipe temperature decreases to lower than 90°C, it makes the compressor restarted automatcally.

2) I

f this control [mentioned in (ii)-1)] is activates 5 times within 60 minutes, it makes the compressor anomalous stop and displays E36, In case of anomalous stop, it cannot be operated again until the discharge pipe temperature decreases to lower than 90°C for 60 minutes continuously.

(b) Current safe control

• Current safe control is done by both Master and Slave unit individually. < Compressor capacity control >

1) Compressor

frequency is controlled by detecting the inverter primary current (T-phase) and the inverter secondary

current.

However under the following operating status

①

and ②, it does not detect the inverter current.

①

Actual compressor frequency N < 20Hz

②

During the period that actual

compressor frequency is decreasing or during the period of 1 second after the actual

compressor frequency decreased.

110 120

Discharge pipe temperature (°C) [Tho-D1, D2]

Retention

Compressor capacity is reduced at 5-second intervals

Reset

40HZ

(33HZ)

45HZ

(38HZ)

• zone A • zone B

zone A

zone B

108 115

Discharge pipe temperature (°C) [Tho-D1, D2]

ON ON

SV1 : OFF SV2 : OFF

103 110

Discharge pipe temperature (°C) [Tho-D1, D2]

Note (1) Value in ( ) are for the models FDC615, 680KXE6 and FDC1180~1360KXE6

2) Initiation condition: When the detected current becomes following value.

①

ithin 2 minutes after starting operation of CM1 and CM2, the capacity control is done at the current safe value

for starting mentioned in a) and b)

②

During

capacity measurement mode, the capacity control is done at the current safe value for measurement mode

mentioned in a) and b)

The inverter primary current (Current safe 1): See following graph

(At starting and at measuring mode, the current safe value is the value (23.5A) at 35ºC of outdoor air tem

perature)

b) The inverter secondary current (Current safe 2): 24A

(At starting and at measuring mode, the current safe values are same.)

* Both current safe values mentioned in a) and b) can be corrected by the code P21 of 7-segment input.

Correction value

= 3 to + 6 (0.5 interval)

Factory setting

= 0

Control contents

①

The

frequency of all compressors currently operating in the same refrigeration system will be decreased at every

one second by 2-steps (Current safe 1: rst step, Current safe 2: second step). The compressor that receives cur-

rent safe control command rst decreases the frequency and when its frequency is retaining at certain frequency,

such retained frequency information is transmitted to master unit.

②

Master

unit will send the command to all other operating compressors in same refrigeration system to decrease

frequency up to the same frequency as the rst compressor reduced to according to the information of the rst

compressor.

③

After the frequency is decreased, if the inverter current within the detection range is still above the current safe

value, the procedure ① will be repeated.

④

After

the frequency is decreased, if the inverter current within the detection range is lower than the current safe

value, compressors will keep that frequency.

⑤

The minimum indicated frequency Ni by this control is 20Hz.

xample 1: In case of heat load zone 3 mentioned in Page 2, the operation of 20Hz×4 compressors is minimum (not

42Hz×4 mentioned in the table).

xample 2 : In case of heat load zone 2 mentioned in Page 2, the operation of 20Hz×2 compressors is minimum (not

42Hz×2 mentioned in the table).

Outdoor air temperature (°C)

Inverter current (A)

23.5

35 39 43 47 50

22.3

19.7

11.2

16.2

OFF

Master unit

(N=0)

Slave unit

(N=1)

CM01 (M=0)

CM02 (M=1)

Current safe

control

Retain

Release

PI control

CM11 (M=0)

CM12 (M=1)

OFF

⑥

When master unit retains the current safe control information in itself or receive the current safe control informa-

tion from slave unit, master unit send signal of “Current safe protective control” to the indoor units during retain-

ing those information.

At-end condition: If either following condition

①

②

is established, the protective control 3) will end and return to

the PI control.

①

The detected inverter current is -1A

or lower of the current safe value for 3 minutes continuously.

②

The detected inverter current is lower than the current safe value for 6 minutes continuously

< Maximum compressor frequency control>

By controlling the maximum compressor frequency according to the rising outdoor air temperature, it makes the in-

verter secondary current decreasing and protects the controller from rising temperature.

Compressor frequency is also controlled by detecting inverter secondary frequency

2) Initiation condition: Outdoor air temperature

35ºC ( For cooling operation)

Control contents

①

Maximum compressor frequency is varied according to following chart.

Whichever the lower of maximum compressor frequency by this control or at normal operation has priority.

* Maximum compressor frequency can be corrected by the code P21 of 7-segment input.

Correction value

= 4 ×

(

: Correction coefcient of current safe value)

4) At-end condition: Initiation conditions are not established.

Outdoor air temperature (°C)

Maximum frequency (Hz)

120

100

120

113

120

113

37 39 43 47 50

If the power transistor temperature exceeds 75°C, the compressor speed is controlled.

(d) Ventilation fan control for cooling inside control box (Master unit/Slave unit)

If the relationship between the outdoor air temperature (detected with Tho-A) and the inverter frequency (the frequency of

CM1 or CM2, whichever the higher) is in the ventilation fan ON zone in the gure mentioned below and when the CM1

or CM2 is operating, the ventilation fan FMC3 is turned ON.

If once it enters in the zone of ON or OFF, FMC3 control is retained for 1 minute before resetting.

However at the start and stop of compressor, 1 minute retention control is invalid.

When all compressors of the unit are stopped, this control is terminated.

(e) Protection for the number of connected indoor units

(i) When the number of connected indoor units exceeds 80 units, all corresponding units are stopped with the error of

excessive number of connected indoor units.

(ii)

The number of connected indoor units is checked when the automatic address setting is completed, or when turning

the power ON or starting operation of indoor units after completion of manual address setting.

(iii)

When the error of exessive number of connected indoor units (E43) occurs, the error code (E43) is diplayed up to

allowable maximum connected indoor units + 1unit on the LCD of remote controller, but in case of automatic

address setting E43 is dispalyed on all of connected indoor units.

(iv)

After 3 minutes or more has elapsed since power ON, the capacities of connected indoor units are summed, and if the

summed result exceeds the usage limitation in comparison with the capacity of connected outdoor units, it displays

error code (E43) and stops all units.

72 75

Speed is reduced once each minute

Retention

Power transistor temp. (°C)

Release

Inverter frequency (Hz)

120

20 35

Ventilation fan

OFF zone

Outdoor air temperature (°C)

Ventilation fan

ON zone

21 ＊

Contents displayed on 7-segment display at the combination error

(f) 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.

Combination list

Note (1) *1 Use FDC335KXE6-K. *2 Use FDC560KXE6-K.

Model

P735 P800 P850 P900

P960 P1010 P1065 P1130 P1180 P1235 P1300 P1360

26 (12*1+ 14) 28 (14 + 14) 30 (14 + 16) 32 (16 + 16) 34 (16 + 18) 36 (18 + 18) 38 (18 + 20) 40 (20 + 20) 42 (20*2+ 22) 44 (22 + 22) 46 (22 + 24) 48 (24 + 24)

12 + 14 14 + 14 14 + 16 16 + 16 16 + 18 18 + 18 18 + 20 20 + 20 20 + 22 22 + 22 22 + 24 24 + 24

Normal combination (HP)

Code display area Data display area Contents of invalid operation

3OPE

Invalid combination of outdoor units

(10) Auto backup operation

(a) Classi-cation of auto backup operations

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

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

(b) Control contents of auto backup operation

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

ON (selected).

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

supply is reset.)

(iii)

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

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

E32: Open L3 phase on power supply at

primary side

E45: Communication error between inverter

PCB and outdoor control PCB E36: Discharge pipe temperature anomaly E48: Outdoor DC fan motor anomaly E37: Outdoor heat exchanger and sub-cooling

coil temperature thernistor anomaly

E51: Power transister overheat

(Continuousness) E38: Outdoor air temperature thermistor

anomaly

E53: Suction pipe temperature thermistor

anomaly

E55: Under-dome temperature thermistor

anomaly

E39: Discharge pipe temperature thermistor

anomaly

E40: High pressure anomaly

E56: Power transitor temperature thermistor

anomaly E41: Power transister overheat E42: Current cut

E59: Compressor startup failure E60: Rotor position detection failure

○

○ ○

○

○ ○

22 ＊

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

ment display and LED show as follows.

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

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

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

E31 E32 E36 E37 E38 E39 E40 E41 E42 E43 E45 E48 E49 E51 E53 E54 E55 E56 E59 E60 E61 E63

Duplicated outdoor unit address No. Open L3 Phase on power supply at primary side Discharge pipe temperature anomaliy

Outdoor air temperature thermistor anomaly Discharge pipe temperature thermistor anomaly High pressure anomaly Power thansistor overheat Current cut

Outdoor DC fan motor anomaly Low pressure error

Suction pipe temperature thermistor anomaly

Under-dome temperature thermistor anomaly Power transitor temperture thermistor anomaly Compressor startup failure Rotor position detection failure

Emergency stop

Anomaly contents

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

System stop Unit stop

Compressor stop

System stop Unit stop

Compressor stop

Remote controller

error display

Outdoor heat exchanger and subcooling coil temperature thermistor anomaly

Communication error between inverter PCB and outdoor control PCB

High pressure sensor/Low pressure sensor anomaly

Power transister overheat (continuousness)

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

Communications error between the master unit and slave units

Backup operation function is only for emergency purpose when one of compressors or one of units is damaged. If backup operation is performed continuously for long period, it may cause the damage of good compressors. Accordingly be sure to repair the damaged unit or to replace the damaged compressor and to cancel the backup operation within 48 hours after starting backup operation.

(i) When the conditions of oil return control are not established (ii) When the backup operation time has exceeded the limit value

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

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

23 ＊

(11) Test run

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

If this control is done from the slave unit, the following display is shown on the 7-segement display. The display returns to normal display if the test run control switch is reset.

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

Take note that this operation has priority over other optional devices such as center console and etc. This operation status is transmitted to the optional devices.

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

• Select the external input terminal (CnS1) and set 7-segment [P11]-[6] for the function of SW5-1, and select the external input terminal (CnS2) and set 7-segment [P12]-[7] for the function of SW5-2.

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

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

(i) Dip switch SW5-1 is turned ON. However the input before the power ON is invalid. (ii) The dip switches SW3 and SW5, other than SW5-1and SW5-2, should be turned OFF. However, regarding the dip switch SW3-2 for automatic backup operation, it is invalid during test run operation

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

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

(i) Heating operation is performed with SW5-2 OFF, while cooling operation is performed with SW5-2 ON. (ii) Indoor EEV control at the end of test run is depended on the specifications of the indoor unit. (iii) Cooling operation: Compressor frequency control is depended on the cooling low pressure control. (iv) Heating operation: Compressor frequency control is depended on the heating high pressure control.

(e) Ending conditions of test run operation

Test run operation is terminated if one of following conditions is satisfied. (i) Test run operation ends when the dip switch SW5-1 is turned OFF. (ii) When the operation is stopped by the error control during test run, the error is displayed same as the normal operation

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

Code indicator Data indicator Contents of invalid operation

10OPE

Slave setting is invalid.

SW5-1

SW5-2

OFF

Test run for heating Test run for cooling

Normally operation and after test operation

CnS1

Shorted CnS2

Open Test run for heating

Shorted Test run for cooling

Open Normal operation and after test operation

Delete

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

(a) Operation permission or prohibition mode

(Note) Following explanation is based on using CnS1 terminal and setting function [P11]-[0] with 7-segment display.

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

CnS2: [P12]-[0] CnG1: [P13]-[0] CnG2: [P14]-[0]

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

outdoor control PCB after setting function [P11]-[0] (Factory setting) with 7-segment display

J13: Switching of CnS1 input method

J13 shorted: Level input by CnS1

J13 open : Pulse input by CnS1

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

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

3) The operation condition is displayed on the LCD of remote controller and it is transferred to optional centralized controller

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

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

(B)

Optional controls

• External input terminal

①

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

②

Each external input terminal can be changed its function by allotting the external input function No. of P11-P14 selected

with 7-segment respectively. (External input functions of the code P11-P14 are shown in g-2)

③

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

to the

external terminal of CnXX.

(Example) If CnS1 terminal is used for demand control (pulse input), allot the "1" of P11 and open J13, and if CnS2 terminal is

used for demand control (level input), allot the "1" of P12 and short J13.

(Note) More than one function cannot operate at same time.

*1 "Setting" means;

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

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

External input terminal External input function allotment of 7-segement

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

CnS1 No volatage contact (DC12V) Shorted P11 "0"-"9" "0" CnS2 No volatage contact (DC12V) Shorted P12 "0"-"9" "1" CnG1 No volatage contact (DC12V) Open P13 "0"-"9" "2" CnG2 No volatage contact (DC12V) Open P14 "0"-"9" "3"

Fig-1

Setting *1 Allotment of external input function (P11-P14)

External input terminal

shorted

External input terminal

open

Master unit "0": External operation input Operation permission Operation prohibition Master unit "1": Demand input Invalid Valid Master unit "2": Forced cooling/heating input Heating Cooling Master unit "3": Silent mode input 1 Valid Invalid Master unit "4": Spare - -

Master/Slave unit "5": Outdoor fan snow protection control input Valid Invalid

Master unit "6": Test run external input 1 (Equal to SW5-1) Test run start Normal operation Master unit "7": Test run external input 2 (Equal to SW5-2) Cooling test run Heating test run Master unit "8": Silent mode input 2 Valid Invalid Master unit "9": Spare - -

Fig-2

Input: CnS1

Switching CnS1

input method:J13

CnS1: Switching operation permission/prohibition mode

Shorted (Level input)

Shorted

Open

Operation prohibition mode

Operation permission mode

Operation prohibition mode

—

(NOP)

Switching operation permission/ Operation prohibitiion mode (Reversal)

Shorted (Level input)

Open (Pulse input)

(b) Demand control

(Note) Following explanation is based on using CnS2 terminal and setting function [P12]-[1] with 7-segment display.

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

CnS1: [P11]-[1] CnG1: [P13]-[1] CnG2: [P14]-[1]

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

control PCB after setting function [P12]-[1] (Factory setting) with 7-segment display.

J13: Switching of CnS2 input method

J13 shorted: Level input by CnS2

J13 open : Pulse input by CnS2

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

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

3) The operation condition is displayed on the LCD of remote controller and it is transferred to optional centralized

controller

①

J13 − Shorted

②

J13 - Open

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

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

PUSH

CnS1 input OFF (Open)

Remote controller operation

Remote controller display

Air-conditioner operation/stop

PUSH PUSH PUSH

OFF

Center Remote

ON (Shorted)

Center

OFF

OFF (Open)

Air-conditioner ON OK

OFF ONON

Remote controller operation

Remote controller display

Air-conditioner operation/stop

Center Center Center

Remote

Air-conditioner ON OK

CnS1 input

OFF

ON OFF OFFON

OFFON

PUSH PUSH PUSH PUSH PUSH

Input: CnS2

Switching CnS2

input method:J13

CnS2: Switching operation permission/prohibition mode

Shorted (Level input)

Shorted

Open

Demand control

Normal operation

Normal control

Demand operation

—

(NOP)

Switching Demand control/ Normal operation (Reversal)

Shorted (Level input)

Open (Pulse input)

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

operation, oil equalized operation and oil return operation.

Demand control

Demand ratio can be changed with the dip switches (SW4-5, SW4-6) on the outdoor control PCB.

SW4-5, SW4-6 demand switch: 0 - open, 1 - shorted

400

54Hz × 2 78Hz × 1 54Hz × 1

OFF

4-5

0 1 0 1

0 0 1 1

450

60Hz × 2 46Hz × 2 60Hz × 1

OFF

504

70Hz × 2 52Hz × 2 70Hz × 1

OFF

560

80Hz × 2 60Hz × 2 78Hz × 1

OFF

615

72Hz × 2 56Hz × 2 36Hz × 2

OFF

80 60 40

4-6

Upper limit operation Hz of compressor

Compressor

output (%)

4-5

0 1 0 1

0 0 1 1

680

80Hz × 2 60Hz × 2 40Hz × 2

OFF

735

26 (12+14)

50Hz × 4 74Hz × 2 50Hz × 2

OFF

800

28 (14+14)

54Hz × 4 78Hz × 2 50Hz × 2

OFF

850

30 (14+16)

58Hz × 4 42Hz × 4 58Hz × 2

OFF

900

32 (16+16)

60Hz × 4 46Hz × 4 62Hz × 2

OFF

80 60 40

4-6

Upper limit operation Hz of compressor

Compressor

output (%)

4-5

0 1 0 1

0 0 1 1

960

34 (16+18)

66Hz × 4 50Hz × 4 66Hz × 2

OFF

1010

36 (18+18)

70Hz × 4 52Hz × 4 70Hz × 2

OFF

80 60 40

4-6

Upper limit operation Hz of compressor

Compressor

output (%)

4-5

0 1 0 1

0 0 1 1

1065

38 (18+20)

74Hz × 4 56Hz × 4 76Hz × 2

OFF

1130

40 (20+20)

80Hz × 4 60Hz × 4 78Hz × 2

OFF

1180

42 (20+22)

84Hz × 4 64Hz × 4 42Hz × 4

OFF

80 60 40

4-6

Upper limit operation Hz of compressor

Compressor

output (%)

4-5

0 1 0 1

0 0 1 1

1235

44 (22+22)

72Hz × 4 56Hz × 4 36Hz × 4

OFF

1300

46 (22+24)

76Hz × 4 56Hz × 4 38Hz × 4

OFF

1360

48 (24+24)

80Hz × 4 60Hz × 4 40Hz × 4

OFF

80 60 40

4-6

Upper limit operation Hz of compressor

Compressor

output (%)

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

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

①

J13 − Shorted

②

J13 - Open

(2)

Silent mode control

(Note) Following explanation is based on using CnG2 terminal and setting functionwith 7-segment display [P14]-[3] or -[8]

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

CnS1: [P11]-[3] or -[8] CnS1: [P12]-[3] or -[8] CnG1:

[P13]-[3] or -[8]

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

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

(c) When CnG2 of master unit is shorted after setting function [P14]-[3] (Factory setting) with 7-segment display, it enters the

silent mode operation. (If the signal is input to the slave unit, it is invalid)

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

the silent mode operation under "or"condition.

(e)

When silent mode signals from all indoor units become "Silent mode end" and when silent mode signal input to CnG2 on

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

(f)

The silent mode operation is effective within the following temperature range.

• Cooling • Heating

29 31°C

Outdoor air temperature

Reset

Effective

2 4°C

Outdoor air temperature

Reset

Effective

PUSH

CnS2 input

OFF OFF

ONON

Compressor OFF

PUSH PUSH PUSH

Remote controller operation

Remote controller display

Air-conditioner operation/stop

Remote

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

Demand control

NormalNormal

CnS2 input

Compressor OFF

Remote controller operation

Remote controller display

Air-conditioner operation/stop

Remote

Demand control Demand control

OFFOFF

ONON

PUSH PUSH PUSH PUSH

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

(Note) Following explanation is based on setting function with 7-segment display [C75].

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

CnS1: [P11]-[5] CnS2: [P12]-[5] CnG1:

[P13]-[5]

CnG2: [P14]-[5]

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

unit and the slave unit are controlled independently.

(b)

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

(i) Set the code [C75] on 7-segment display

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

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

“1”: Outdoor fan snow protection control is enabled

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

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

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

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

7-segment LED stops blinking.

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

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

(vii)

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

(d) Contents of outdoor fan snow protection control

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

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

(ii)

The outdoor fan runs for 30 minutes

(iii) During this snow protection control, the magnetic

contactor 52C1 of the compressor is ON

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

(Note) Following explanation is based on using CnG1 terminal and setting function [P13]-[2] with 7-segment display.

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

CnS1: [P11]-[2] CnS2: [P12]-[2] CnG2:

[P14]-[2]

(a) When SW3-7 on the outdoor control PCB is turned ON after setting function [P13]-[2] with 7-segment display, if CnG1 is

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

(b)

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

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

(5)

Emergency stop control

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

like as refrigerant leakage detector and that information is tarnsmitted to the outdoor unit, the outdoor unit stops opeartion and

emergency stop error message transmitted to all indoor units running.

It is able to make the emer

gency stop function effective by remote controller indoor function setting.

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

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

command is transmitted to all indoor units.

SW3-7

ON CnG1

Open Operation in cooling only

Shorted Operation in heating only

OFF Normal operation

3 5

Outdoor air temperature (°C)

Fan OFF

Fan ON

+ 188 hidden pages

Mitsubishi Heavy Industries FDT45KXE6A, FDT112KXE6A, FDTC28KXE6A, FDTC22KXE6A, FDTC45KXE6A Service Manual

Specifications and Main Features

Frequently Asked Questions

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