Mitsubishi FDT100V, FDC100VN user guide manual

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MITSUBISHI HEAVY INDUSTRIES - PAC SERVICE MANUAL

INDEX

MAINTENANCE DATA 2 ERROR CODES 4 PCB INDOOR UNITS 8 ERROR DISPLAY & REMEDY CHART 12 PCB OUTDOOR UNITS 22 ERROR DISPLAY – OUTDOOR UNIT 25 OPERATIONAL DATA CHECK – WIRED CONTROLLER 35 REMOTE CONTROL – WIRED 36

- SETTING FUNCTIONS 37 ERROR DISPLAY – WIRELESS CONTROL 43 REMOTE CONTROL WIRELESS 44

1. MAINTENANCE DATA

1.1 Servicing

(1) Evacuation

The evacuation is a procedure to purge impurities, such as noncondensable gas, air, moisture from the refrigerant equipment by

using a vacuum pump. Since the refrigerant R410A is very insoluble in water, even a small amount of moisture left in the refriger-

ant equipment will freeze, causing what is called ice clogging.

Evacuation procedure

Make sure that the both service valves of gas and liquid line are fully opened.

(a) Check to ensure that there is no internal pres-

sure in the unit. If there is an internal pres-

sure, it should be relived through the service

port.

(b) Connect the charging hose of the gauge mani-

Outdoor unit

fold to the service port of the gas piping.

Close high pressure valve 2 of gange mani-

fold.

pump.

Repeat evacuation in the following sequence.

Handle Lo

Please run the vacuum pump for at least one hour after the vacuum gauge

Vacuuming begins

shows -101kPa or lower. (-755mmHg or lower)

When the vacuum gauge's needle pointer creeps up, there is moisture left in the system or a leak. Pull air again after you have checked the system for a leak and rectified it. Use a reverse flow stop adapter to prevent the vacuum pump's lubricant oil from flowing into the refrigerant system.

No increase in the reading of the vacuum gauge's needle pointer.

Vacuuming completed

Vacuum gauge check

Notes (1) Refer to the exterior-view drawing for the position of the service valve.

Notes (2) When connecting of ther service valve, flare connection for both the

Charge hose (for R410A only)

Charge valve Vacuum adapter (for R410A only)

indoor and outdoor unit.

Indoor unit

Gus line

Liquid line

Charge port

Gauge manifold (for R410A only)

Vacuum

pump

Handle Hi

Charge hose A (for R410A only)

Refrigerant cylinder

Notes (1) Do not use the refrigerant pressure to expel air.

Notes (2) Do not use the compressor for evacuation.

Notes (3) Do not operate the compressor in a vacuum condition.

(2) Refrigerant charging

(a) After the evacuation shown in the above, change the connection of the charge hose A to the refrigerant cylinder.

(b) Purge air from the charge hose A .

First loosen the connecting portion of the charge hose at the gauge manifold side and open valve 3 for a few seconds, and

then immediately retighten it after observing that gas has blown out from loosened connecting portion.

When refrigerant has been charged into the unit to some extent, refrigerant flow becomes stagnant. When that happens, start

the compressor in cooling cycle until the system is filled with the specified amount of gas, then close valves 1 and 3 and

remove the gauge manifold. Cover the service port with caps and tighten them securely.

(d) Check for gas leakage by applying a gas leak detector around the piping connection.

(e) Start the air conditioner and make sure of its operating condition.

1.2 Trouble shooting for refrigerant circuit

(1) Judgement of operating condition by operation pressure and temperature difference

Making an accurate judgement requires a skill that is acquired only after years of experience, one trouble may lead to an another

trouble from a single trouble source and several other troubles may exist at the same time which comes from a undetected different

trouble source.

Filtering out the trouble sources can be done easier by comparing with daily operating conditions. Some good guides are to judge

the operating pressure and the temperature difference between suction air and delivery air.

Following are some pointers,

Pressure

Indi-

Circuit

cation

Too low

A little low

A little

Normal

high

High side ¡ Low side ¡

Too high

1) Excessive overcharging of refrigerant

2) Mixture of non condensable gas (air etc.)

Trouble cause

High side ¡ Ineffective compression Low side ¡ (defective compressor) High side ¡ Low side ¡

1) Insufficient refrigerant in circuit

2) Clogging of strainer

3) Gas leakage

4) Clogging of air filter (in cooling)

5) Decrease in heat load (in cooling)

6) Locking of indoor fan (in cooling)

High side ¡ Low side ¡

1) Locking of outdoor unit fan (in cooling)

2) Dirty outdoor heat exchanger (in cooling)

3) Mixture of non condensable gas (air etc.)

High side ¡ Low side ¡

1) Too high temperature of room

(1) Selfdiagnosis function

(a) Check Indicator Table

Whether a failure exists or not on the indoor unit and outdoor unit can be know by the contents of remote controller eroor code and microcomputer normality pilot lamp) or red LED (check pilot lamp).

1) Indoor unit side

1.3 Diagnosing of microcomputer circuit

, indoor/outdoor unit green LED (power pilot lamp

Remote

controller

error code

No-indication

LCD flashes continuously or is off.

Green

Keeps flashing

Stays OFF Stays OFF Stays OFF

Keeps flashing

Keeps flashing Keeps flashingStays OFF 2 time flash

Keeps flashing

Red

Stays OFF

*3 time flash

Stays OFF

Keeps flashing

E6 E7

E10

E16 E28

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

Stay OFF or Lights

continously

Keeps flashing

Keeps flashing Keeps flashing1 time flash Stays OFF

Keeps flashing

Stay OFF

2 time flash

1 time flash

Stays OFF

Keeps flashing

Outdoor unit LEDIndoor unit LED

Green

Stays OFF

Red

Stays OFF

2 time flash

Stays OFF

Cause

Normal

Power OFF, L phase wiring is open, power source failure

Indoor unit microcomputer failure

Remote controller wires X and Y are reversely connected. *For wire breaking at power ON, the LED is OFF. Remote controller wire is open. (X wire breaking : A beep is produced and no indication is made. Z wire breaking : No beep and no indication) The remote controller wires Y and Z are reversely connected.

Poor connection or disconnection in wires connecting the indoor and outdoor units.

When multiple remote controllers are used for control, the power supply to some indoor units is OFF.

Indoor unit PCB fault

The remote controller wire Y is open. The remote controller wires X and Y are reversely connected. Noise is penetrating the remote control lines. The remote controller or indoor control PCB is faulty. (The communications circuit is faulty.)

Indoor / outdoor transmission error. Outdoor unit control PCB is faulty when the power is turned on, or the inverter

parts are faulty (FDCVA 151~251 type).

Outdoor unit microcomputer failure

Indoor unit heat exchanger thermistor failure Indoor unit return air thermistor failure

Heating overload (indoor heat exchanger temperature is abnormally high) and indoor heat exchanger thermistor is faulty.

The float SW operates (with FS only). Drain up kit wiring fault.

When multi-unit control by remote controller is performed, the number of units is over (more than 17 units). Two remote controller are provided for one controller is performed.

Fan motor is faulty (FDTA 501, 601 type, FDKN type).

Remote controller thermistor failure

Outdoor unit LEDIndoor unit LED

Green

Keeps flashing

Red Green

Stays OFF

1 time flash

Red

Wiring is open or reversal phase (FDCA 301~601 type)

Abnormal current cut of compressor (FDCA 301~601 type)

52C secondary side L3-phase wiring is open. (FDCA 301~601 type)

Discharge temperature abnormality.

Discharge pipe thermistor failure

63H1 operation (FDCA 301~601 type)

Outdoor air temperature thermistor failure

Inverter Over-voltage Trouble. (FDCVA 151~251 type)

DC fan motor abnormal. (FDCVA 151~251 type)

Remote

controller

error code

E32

E33

E34

E36

E37

E38

E39

E40

E47

E48

Cause

Keeps flashing Keeps flashing

Stays OFF 1 time flash

E35

Keeps flashing

Stays OFF 1 time flash

Current (Abnormalities in a compressor over current)

E42

Keeps flashing Keeps flashing

Stays OFF Lights contiously

52C abnormal. (FDCA 301~601 type)

E52

Keeps flashing

Stays OFF 1 time flash

Power transistor thermistor is faulty or disconnection or connector connections are poor. (FDCVA 151~251 type)

E56

Keeps flashing

Stays OFF 1 time flash

Insufficient refrigerant.

E57

1 time flash

Keeps flashing

Stays OFF 2 time flash

Compressor startup error (FDCVA 151~251 type)

E59

3 time flash

Keeps flashing

Stays OFF 1 time flash

Compressor loader position detection error. (FDCVA 151~251 type)

E60

Outdoor unit heat exchanger thermistor failure

Outdoor heat exchanger temperature is high or outdoor heat exchanger thermistor is faulty.

Inverter primary side current is abnormal. (FDCVA151~251 type)

2) Outdoor unit side

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

(b) Display sequence of error, inspection display lamp

1) One kind error Display corresponding to the error is shown.

2) More than one errors.

Section Display section

Error code of remote controller

Inspection LED (red) of indoor unit PCB

Inspection LED (red) of outdoor unit PCB

• Displays the error of higher priority (When plural errors are persisting)

• Displays the present errors. (When a new error has occurred after the former error was reset.)

3) Timing of error detection

● Indoor unit side.

Error detail Error code Timing of error detection

······················

Drain error (float switch motion)

Wrong connection between the indoor and outdoor units.

Transmission error of remote controller indoor unit

Transmission error between indoor/outdoor units

The number of connected indoor units exceeds the connection limit (when multiple units are control by a single remote controller).

Broken wire of indoor unit return air thermistor

Broken wire of heat exchanger thermistor

● Outdoor unit side.

Error detail Error code Timing of error detection

Broken wire of outdoor air temperature thermistor

Broken wire of heat exchanger thermister

Broken wire of discharge pipe thermistor

Broken wire of power transistor thermistor

“ Wait ”

Normally, 30 seconds after the power is turned ON.

No communications even once with the outdoor unit.

After 1 or more communications of the indoor unit with the remote controller following power on, transmission errors cause an interruption for 2 minutes.

After communications with the outdoor unit 1 or more times, communications are abnormal continuously for 2 minutes.

Normally after the power is turned ON (during communications).

When an input temperature of –50°C or lower is measured by the return air thermistor is measured for 5 seconds or longer within 60 minutes after the first detection.

When an input temperature of –50°C or lower is measured by the heat exchanger thermistor is measured for 5 seconds or longer within 60 minutes after the first detection.

When a thermistor input temperature of –30°C or lower is measured for 5 seconds or longer 3 times within 40 (60) minutes after the 1st detection between 2 minutes and 2 minutes 20 seconds after compressor operation starts.

When a thermistor input temperature of –10°C or lower is measured for 5 seconds or longer 3 times within 40 (60) minutes after the 1st detection between 10 minutes and 10 minutes 20 seconds (between 2 minutes and 2 minutes 20 seconds) after compressor operation starts.

When the under-dome thermistor input temperature of –10°C is measured for 5 seconds or longer 3 times within 40 minutes after the 1st detection between 10 minutes and 10 minutes 20 seconds after compressor operation starts.

Notes (1) Values in ( ) show for the FDCA301~601 models.

(2) The power transistor temperature sensor is used in the FDCVA151~251 models only.

4) Recording and reset of error

Error display Memory Reset

Error code of remote controller

Indoor unit inspection lamp (red)

Outdoor unit inspection lamp (red)

Notes (1) Priority is in the order of E1 > ... > E10 > ... > E60.

• Saves in memory the mode priority

• Cannot save in memory

• Saves in memory the mode priority

(1)

of higher

(1)

of higher

• Stop the unit operation by pressing the ON/OFF switch of remote controller.

• Operation can be started again if the error has been reset.

Indoor unit

: Press the ON/OFF button on the remote controller. Or disconnect and reconnect the power supply connector

(CNW1 or CNW0) on the indoor unit control PCB or turn the main power supply OFF.

Outdoor unit

: Turn the main power supply OFF.

(2) Procedures of trouble diagnosis

When any error occurs, inspect in following sequence. Detailed explanation on each step is given later in this text.

Error Power supply reset

Replacement or repair of defective parts Test run/adjustment

Note (1) It means the operation to turn off the power and back on again more than 1 min. later in order to reset the malfunction of microcomputer due to the

effect of power supply conditions or accidental noise.

Power supply check

(indoor/outdoor unit)

Check of inspection display [In-

door/outdoor unit PCB, remote

controller or Indication board]

Check of unit

controller

(1)

Check of inspection display [In-

door/outdoor unit PCB, remote

controller or Indication board]

(3) Error diagnosis procedures at the indoor unit side

To diagnose the error, measure the voltage (AC, DC), resistance, etc. at each connector around the circuit board of indoor unit

based on the inspection display or the operation state of unit (no operation of compressor or blower, no switching of 4-way valve,

etc.) If any defective parts are discoverd, replace with the assembly of parts as shown below.

(a) Single-unit replacement parts for circuit board of indoor unit. (Peripheral electric parts for circuit board.)

Indoor unit printed circuit board, thermistor (return, heat exchanger), operating switches, limit switches, transformers, fuses.

Note (1) Use normal inspection methods to determine the condition of strong electrical circuits and frozen cycle parts.

(b) Replacement procedure of indoor unit microcomputer printed circuit board

Microcomputer printed circuit board can be replaced with following procedure. (i) Confirm the parts numbers. (Refer to the following parts layout drawing for the location of parts number.)

Model

FDTA 151~401

FDTA 501, 601

FDE

Parts number

PJA505A122ZD

PJA505A122ZC

PJA505A128ZF

Model

FDKA 151~251

FDKA 301

FDUR

Parts number

PHA505A018ZF

PHA505A018ZG

PJA505A131ZC

Parts layout on the indoor unit PCB

Model: FDT series

To power supply PCB (501, 601) (CNW9)

Fan motor (501, 601)

Power supply PCB (CNW8)

Connector (CNT)

Address switch (SW2)

Heat exchanger thermistor, Return air thermistor

(Thi-R1, Thi-A)

CNT

CNM2

C13

CNW8

CNY

PC5

C58

CNW9

C12

IC2

IC3

IC9

CNI

Heat exchanger thermistor

(Thi-R2)

CNM3

52X6 52X1 52X2 52X3

PC3

SW2

CNH CNN1

IC12

J10

J9~J11 (SW10)

Fan motor (151~401)

CNR

52X4

CNG

LED2

SW10

J11

J12

1234

SW5

J5J6J7

LED1

52X8-2

CNE

SW8

SW7

J1J2J3

1234

C41

SW9

DIP switch (SW5)

KN1

TVS1

J5~J6 (SW8)

CNV

IC8

IC11

J1~J4 (SW7)

DIP switch (SW9)

Z2D

52X7

To power supply (CNW7)

R17

IC7

ZD1

R16

CNJ

Remote controller

Louver motor

CNW7

C23

TM1

52X8-1

PC2 PC1

C11

CNB

Z3D

Z4D

Z5D

● Change by the jumper wire

Name Function

J1 (SW7-1)

J2 (SW7-2)

J3 (SW7-3)

J4 (SW7-4)

J5 (SW8-1)

J6 (SW8-2)

“None” means that jumper wire is not provided on the PCB or the

Note (1)

connection is cut The replacement board is not equipped with jumpers J1 ~ J6. Instead,

(2)

SW7 and 8, with the same functions as jumpers J1~J6, are used in the position where the jumpers were previously. Set SW7 and 8 locally in accordance with the above table.

With

Input signal - Reverse invalid

(1)

None

Input signal - Rus stop

With

Heating thermostat OFF-Lo

(1)

None

Heating thermostat OFF-Stop, Lo

With

Normal operation operable

(1)

None

Operation permission prohibited

With

Normal

(1)

None

Heating temp. +3

With

Louver free stop control - Invalid

(1)

None

Louver free stop control - Effective

With

Freeze prevention fan control activated.

(1)

None

Freeze prevention fan control deactivated.

● Control change switch (SW5, SW9, SW10)

Function of DIP switch SW5 (Usually all turned OFF)

Switch Function

SW5-4SW5-3

OFF

Setting time : 1000hrs. (Unit stop)

Setting time : 1000hrs. (Display)

OFF

Setting time : 600hrs. (Display)

Setting time : 180hrs. (when shipped from factory)

OFF

Function of DIP switch SW9 (Usually all turned OFF)

Switch Function

SW9-3

SW9-4

Note (1) It is normally ON only in the case of SW9-4.

Emergency operation

Normal

OFF

Fan control : Powerful mode

Fan control : Mild mode

OFF

Function of DIP switch SW10 (Usually all turned OFF)

SW10-1 (J9)

SW10-2

(J10)

Switch Function

OFF

SW10-3

(J11)

Auto swing fanction - None

OFF

Auto swing function - With

Remote controller air flow –

OFF

Remote controller air flow 1 speed

Remote controller air flow 2 speed

OFF

Remote controller air flow 3 speed

Model: FDEN series

Fan motor

CNJ2CNM3CNRCNV

PCB power supply connector (Primary side)

Power supply

CNW1

52X5

52X352X252X252X652X4

CNW0

CNM1

ZNR

IC8IC7

PCB power supply connector

(Secondary side)

Remote controller

52X8-2

52X8-1

KN1

52X7

C57

CNQ CNT

Connector (CNT)

Heat exchanger thermistor, Return air thermistor

(Thl-R1, Thl-A)

● Change by the jumper wire

Name Function

J1 (SW7-1)

J2 (SW7-2)

J3 (SW7-3)

J4 (SW7-4)

J5 (SW8-1)

J6 (SW8-2)

“None” means that jumper wire is not provided on the PCB or the

Note (1)

connection is cut The replacement board is not equipped with jumpers J1 ~ J6. Instead,

(2)

SW7 and 8, with the same functions as jumpers J1~J6, are used in the position where the jumpers were previously. Set SW7 and 8 locally in accordance with the above table.

With

Input signal - Reverse invalid

(1)

None

Input signal - Rus stop

With

Heating thermostat OFF-Lo

(1)

None

Heating thermostat OFF-Stop, Lo

With

Normal operation operable

(1)

None

Operation permission prohibited

With

Normal

(1)

None

Heating temp. +3

With

Louver free stop control - Invalid

(1)

None

Louver free stop control - Effective

With

Freeze prevention fan control activated.

(1)

None

Freeze prevention fan control deactivated.

CNE

LED1

LED2

CNB CNW2

DIP switch (SW5)

SW2 SW5

CNH CNN1

SW8

SW7SW9SW10

J5, J6 (SW8)

J1~J4 (SW7)

DIP switch

Address switch (SW2)

J9~J11 (SW10)

(SW9)

Heat exchanger thermistor (Thl-R2)

● Control change switch (SW5, SW9, SW10)

Function of DIP switch SW5 (Usually all turned OFF)

Switch Function

SW5-4SW5-3

OFF

Setting time : 1000hrs. (Unit stop)

Setting time : 1000hrs. (Display)

OFF

Setting time : 600hrs. (Display)

Setting time : 180hrs. (when shipped from factory)

OFF

Function of DIP switch SW9 (Usually all turned OFF)

Switch Function

SW9-3

SW9-4

Note (1) It is normally ON only in the case of SW9-4.

Emergency operation

Normal

OFF

Fan control : Powerful mode

Fan control : Mild mode

OFF

Function of DIP switch SW10 (Usually all turned OFF)

SW10-1 (J9)

SW10-2

(J10)

Switch Function

OFF

SW10-3

(J11)

Auto swing fanction - None

OFF

Auto swing function - With

Remote controller air flow –

OFF

Remote controller air flow 1 speed

Remote controller air flow 2 speed

OFF

Remote controller air flow 3 speed

Model: FDKN series

This diagram shows the PCB for the 151~251. The component layout on the 301 PCB is different, but the functions are the same.

Heat exchanger thermistor,

Dip switch (SW5)

J9~J11 (SW10)

Dip switch (SW9)

J5~J8 (SW8)

J1~J4(SW7)

Adress switch (SW2)

CNZ

SW10

J10

J11

SW8

J5J6J7

SW2

IC9 IC10

LED1

SW5

SW9

J1J2J3

CNE

CNH

IC11

R62

Return air thermistor (Thl-R1, Thl-A)

R17

CNW1

CNM

Heat exchanger thermistor

J31

(Thl-R2)

CNN1

CNB

J31

SW7

CNL

C92

CNG

CNY CNJ

IC8

CNT

R16

R151

C104

Remote controller

PCB power supply connector

(Primary side)

PCB power supply connector

(Secondary side)

TB,3

TB,2

TB,1

● Change by the jumper wire

Name Function

J1 (SW7-1)

J2 (SW7-2)

J3 (SW7-3)

J4 (SW7-4)

J5 (SW8-1)

J6 (SW8-2)

J8 (SW8-4)

“None” means that jumper wire is not provided on the PCB or the

Note (1)

connection is cut The replacement board is not equipped with jumpers J1 ~ J8. Instead,

(2)

SW7 and 8, with the same functions as jumpers J1~J8, are used in the position where the jumpers were previously. Set SW7 and 8 locally in accordance with the above table.

With

Input signal - Reverse invalid

(1)

None

Input signal - Rus stop

With

Heating thermostat OFF-Lo

(1)

None

Heating thermostat OFF-Stop, Lo

With

Normal operation operable

(1)

None

Operation permission prohibited

With

Normal

(1)

None

Heating temp. +3

With

Louver free stop control - Invalid

(1)

None

Louver free stop control - Effective

With

Freeze prevention fan control activated.

(1)

None

Freeze prevention fan control deactivated.

With

Model 151~251

(1)

None

Model 301

Louver motor

(CNT)

Fan motorConnector

● Control change switch (SW5, SW9, SW10)

Function of DIP switch SW5 (Usually all turned OFF)

Switch Function

SW5-4SW5-3

OFF

Setting time : 1000hrs. (Unit stop)

Setting time : 1000hrs. (Display)

OFF

Setting time : 600hrs. (Display)

Setting time : 180hrs. (when shipped from factory)

OFF

Function of DIP switch SW9 (Usually all turned OFF)

Switch Function

SW9-1

SW9-2

SW9-3

SW9-4

Note (1) It is normally ON only in the case of SW9-4.

Custom code - Change

OFF

Custom code - Normal

Power failure security - Effective

OFF

Power failure security - Invalid

Emergency operation

Normal

OFF

Fan control : Powerful mode

Fan control : Mild mode

OFF

Function of DIP switch SW10 (Usually all turned OFF)

SW10-1 (J9)

SW10-2

(J10)

Switch Function

OFF

SW10-3

(J11)

Auto swing fanction - None

OFF

Auto swing function - With

Remote controller air flow –

OFF

Remote controller air flow 1 speed

Remote controller air flow 2 speed

OFF

Remote controller air flow 3 speed

Model: FDUR series

Drain motor

CNT

Connector (CNT)

Heat exchanger thermistor, Return air thermistor

(Thl-R1, Thl-A)

Heat exchanger thermistor (Thl-R2)

CNN1

CNH

CNV

CNO

Remote controller

CNF

CNN2

CNB

CNQ

Address swith (SW2)

DIP switch (SW5)

SW2 SW10

SW5 SW7

LED2

J10~J11 (SW10)

J6 (SW8)

DIP switch (SW9)

J1~J4

Float switch

(SW7)

CNZ CNI

SW9SW8

CNO

52X5 52X4

CNJ2 CNR

L3L2

52X3

52X2 52X1 52X6

CNW1

CNM3

PCB power supply connector (Primary side)

● Change by the jumper wire

Name Function

J1 (SW7-1)

J2 (SW7-2)

J3 (SW7-3)

J4 (SW7-4)

J6 (SW8-2)

“None” means that jumper wire is not provided on the PCB or the

Note (1)

connection is cut The replacement board is not equipped with jumpers J1 ~ J4, J6.

(2)

Instead, SW7 and 8, with the same functions as jumpers J1~J4, J6, are used in the position where the jumpers were previously. Set SW7 and 8 locally in accordance with the above table.

With

Input signal - Reverse invalid

(1)

None

Input signal - Rus stop

With

Heating thermostat OFF-Lo

(1)

None

Heating thermostat OFF-Stop, Lo

With

Normal operation operable

(1)

None

Operation permission prohibited

With

Normal

(1)

None

Heating temp. +3

With

Freeze prevention fan control activated

(1)

None

Freeze prevention fan control deactivated

LED1

CNW0

CNE

CNG

Power supply

CNW2

PCB power supply connector

CNK2CNK1

CNA

(Secondary side)

● Control change switch (SW5, SW9, SW10)

Function of DIP switch SW5 (Usually all turned OFF)

Switch Function

SW5-4SW5-3

OFF

Setting time : 1000hrs. (Unit stop)

Setting time : 1000hrs. (Display)

OFF

Setting time : 600hrs. (Display)

Setting time : 180hrs. (when shipped from factory)

OFF

Function of DIP switch SW9 (Usually all turned OFF)

Switch Function

SW9-3

SW9-4

Emergency operation

Normal

OFF

Fan control : High speed (High Ceiling)

Fan control : Standard

OFF

Function of DIP switch SW10 (Usually all turned OFF)

Switch Function

(J10)

OFF

SW10-3

(J11)

SW10-2

Remote controller air flow –

OFF

Remote controller air flow 1 speed

Remote controller air flow 2 speed

OFF

Remote controller air flow 3 speed

Remote controller or Indication board: Inspection LED, error code

Indoor unit PCB: Red LED (inspection display), Green LED (CPU. normal display)

Outdoor unit PCB: ARed LED (inspection display), Green LED (CPU. normal display)

Error display : No display

LCD display : No display

[Power supply line error]

Indoor unit

Red LED

Green LED

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

Stays OFF

Red LED

Green LED

Outdoor unit

Start

Is the voltage

between 1 and 2/N of the indoor

unit’s terminal block

AC220/240V?

YES

NO YES

Voltage between

1 and 2/N of the outdoor unit’s

terminal block is

AC220/240V.

Outdoor unit check

Fuse OK?

YES

Is the voltage at

CNW3 or 10

(1)

transformer’s secondary side

(red – red) on the

14 V or higher?

YES

NO NO

Disconnect the transformer’s primary side (CNW1) and measure the resistance on both ends of CNW1 (using a tester, etc.).

Notes (1) In models other than FDT, replace the fuse.

(2) FDT only

Transformer exchange

Note (1) In models other than FDT, it is CNW2.

Stays OFF

Control lines connected wrong or disconnected.

Several 10K Ω or higher.

YES

Fuse exchange

Replacement indoor unit power supply PCB

Is the voltage

between CNW5 2 and 3

DC 12V?

YES

Is the voltage

between CNW8 2 and 3

DC 12V?

YES

Does it return

to normal when the power

supply is reset?

Replacement indoor unit control PCB

(1)(2)

YES

Replacement indoor unit power supply PCB

Note (1) 3 is GND

Harness disconnection

Unit is normal. (Malfunction was due to noise, etc.)

Indoor unit

Red LED 3 time flash

Green LED

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

Keeps flashing

Red LED Stays OFF

Green LED

Outdoor unit

Keeps flashing

Remote

controller wiring

connect check (Red·

White·Black)

Approximately

(1)

10 ~ 11 V between

X and Z.

Note (1) Z is GND.

Remote controller wire

is removed

YES

Remeasure

between X~Z.

10~11V.

(2)

Is the voltage

between CNW8 1-3

12V?

YES

Remote controller wire short circuit? Remote controller defective

Note (2) 3 is GND.

Correction

Power supply reset

Check the

CNW5-8 harness.

Harness exchange

Normal?

YES

Maltifunction by

accidental noise

Only case of FDT

Replacement indoor unit power supply PCB

Remote controller wire disconnection? Remote controller defective

Replacement indoor

unit control PCB

Indoor – outdoor communications trouble

Red LED Green LED

Notes (1)

Error display “ WAIT

Indoor unit

Stays OFF

Keeps flashing

If trouble occurs during communications, the error code E5 is displayed (Outdoor, Red LED flashes 2 times). The check procedure is as shown below. (However, excluding

”

(Initial (when the power is turned on)

Outdoor unit

Red LED Green LED

connection related problems) Also, if the power supply is reset after E5 occurs, if the trouble is intermittent, it will be displayed in the LCD(“ WAIT ”).

The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

(2)

● 151~251 ● 301~601

The remote controller’s LCD(“ WAIT ”) display remains unchanged after waiting 2 minutes after the power is turned on.

YES

Is the outdoor unit controller's

power fuse F5 (20A) blown?

YES

(1)

Is the voltage at the secondary side

of the noise filter AC220/240V?

Are the wires connecting to the

noise filter board OK?

YES

Is the indoor unit’s green LED

flashing?

YES

Is the outdoor unit’s control red

LED flashing 2 times?

YES

Are the wires connecting the indoor

and outdoor units connected according to specifications?

Measure the voltage between 2/N and 3 of the outdoor unit’s terminal block.

Measure the voltage between 2/N and

3 of the indoor unit’s terminal block.

YES

DC 20V

Approx. 0V DC

DC 20V

Indoor unit control

PCB defect

Note (1) 1 phase is removed.

Power supply fuse exchange

Noise filter

exchange

Connects corrently

Indoor unit control

PCB defect

Indoor/outdoor unit control PCB

defect Remote controller defect Remote controller wire disconnection (Y)

Repair the wires

connecting the indoor

and outdoor units.

Outdoor unit

control PCB defect

Connection wires are faulty (disconnection)

Noise

The remote controller’s LCD (“ WAIT ”) display remains unchanged after waiting 2 minutes after the power is turned on.

Is the outdoor green LED

Is the indoor green LED

Is the outdoor red LED

flashing 2 times?

Are the wires connecting the indoor

and outdoor units connected according

to specifications?

Measure the voltage between 2/N and 3 of the outdoor unit’s terminal block.

Measure the voltage between 2/N and

3 of the indoor unit’s terminal block.

Keeps flashing

YES

flashing?

YES

flashing?

YES

DC 20V

Approx. 20V DC

2 time flash

Indoor unit control

PCB defect

Indoor unit control PCB defect Remote controller defect Remote controller wire disconnection (Y)

Repair the wires

connecting the indoor

and outdoor units.

Approx. 0V DC

Outdoor unit control PCB

Approx. 0V DC

defect

Is the fuse (10A) OK?

YES

Is the voltage on the outdoor unit’s

transformer secondary side (red –

red) 14 V?

YES

Outdoor unit control PCB

defect

Fuse

exchange

(1)

Transformer

defect

Inverter check before replacing the power supply fuse.

Is the noise filter out of

phase or short circuited?

YES

Are there any cracks or burnouts in

the power module or diode stack?

YES

Is the reactor abnormal?

YES

Power supply

fuse exchange

Nois filter

exchange

Replacement outdoor

unit control PCB

Reactor

exchange

Indoor unit control

PCB defect

Remote controller does not display

after the power is turned on.

YES

Is the indoor green LED

flashing?

YES

Is the outdoor red LED

flashing 2 times?

YES

Are the wires connecting the indoor

and outdoor units connected according

to specifications?

YES

Measure the voltage between 2/N

and 3 of the outdoor unit’s

terminal block.

Approx. 20V DC

Measure the voltage between 2/N

and 3 of the indoor unit’s

terminal block.

Approx. 20V DC

Indoor unit

control PCB

defect

Connection wires are

faulty (disconnection)

Repair the

connection

lines.

Approx. 0V DC

Outdoor unit control

PCB defect

Approx. 0V DC

Connection wires are

faulty (disconnection)

Noise

Is the fuse on the indoor unit

Is the voltage on the outdoor

unit’s transformer secondary

side (red – red) AC15V?

Is the voltage between the red and

black wires in the remote

controller DC10~11V when the

remote controller is disconnected?

The indoor/outdoor control board is faulty. The remote controller is faulty. The X or Z lines in the remote controller are disconnected.

control PCB OK?

YES

Remote

controller

defect

Fuse

exchange

Transformer

defect

The remote

controller wires are

short

circuited.

Error display :

[Communication error between remote controller~Indoor unit]

Indoor unit

Red LED

Green LED

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

Stays OFF

Keeps flashing

Voltage

between X and Z

approximately

10~11 V?

Red LED

Green LED

YES

Replacement remote

Outdoor unit

controller

Voltage

fluctuates between

5~11 V between

Y and Z.

Power supply OFF

YES

Voltage

fluctuates between

5~10 V between

Y and Z

indoors.

Remote controller

wire disconnection

YES

Voltage

fluctuates between

5~10 V between

CNB Y and Z.

Terminal block CNB

harness is defective.

YES

Indoor unit

resets every

4 minutes.

YES

❇

After the green LED lights up once, it begins flashing again continuously. The louver moves once in the

Power supply reset

close direction.

Stays OFF

Keeps flashing

Replacement remote

Remote controller

wire is removed

Is the

YES

resistance between

Y~Z on the remote controller

approximately

10kΩ?

Resistance is

approximately 10kΩ

between indoor

Y~Z.

YES

Remote controller

wire short circuit

YES

Normal?

controller

Replacement

remote controller

Replacement indoor

unit control PCB

Noise?Power supply reset

YES

Normal?

Noise

Replacement indoor

unit control PCB

Indoor unit

Red LED

Green LED

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

Stays OFF

Stays OFF or Lights continuously

Red LED

Green LED

Outdoor unit

● Only case of FDT

Stays OFF

Lighting

Is the voltage

between CNW8

2-3 12V?

YES

Power supply reset

Check the CNW5CNW8 harness.

● Cases of other than FDT

Normal

YES

The unit is normal. (The malfunction is due to noise, etc.)

Replacement indoor unit control PCB

Power supply reset

Stays OFF

Keeps flashing

Disconnection ?

Is the

voltage at the transfomer's

secondary side (red-red) 15V

or higher?

YES

Replacement indoor unit

power supply PCB

Is it normalized?

Defective indoor unit control PCB Replace. (Defective CPU)

YES

(Runaway of indoor unit CPU due to noise, etc. Transient trouble)

Harness

exchange

Transformer

exchange

Unit is normal.

Error display :

[Defective indoor unit heat exchanger thermistor]

Indoor unit

Red LED

Green LED

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

Is the indoor

unit heat exchanger

thermistor connector

connection OK?

Correction

1 time flash

Keeps flashing

Red LED

Green LED

YES

Outdoor unit

Stays OFF

Keeps flashing

Defective indoor unit control PCB Replace-ment (Defective indoor unit heat exchanger thermistor input circuit)

YES

Are characteristics of indoor unit heat

exchanger thermistor OK

or is there any

broken wire?

Defective indoor unit heat exchanger thermistor Replacement

Return air thermistor (Th Indoor unit heat exchanger thermistor (ThI-R1, R2) Resistance temperature characteristics

Resistance (kΩ)

010 304020 50

Temperature (˚C)

Note (1) 22.5 kΩ at -6˚C

● Display condition

If a temperature of –50ºC or lower is detected continuously for 5 seconds or longer by the thermistor, the compres-

sor stops. After a 3 minute delay, the compressor restarts. If this state is detected again within 60 minutes after the

first detection.

I-

5kΩ at 25˚C

Error display :

Red LED

Green LED

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

Indoor unit

1 time flash

Keeps flashing

Is the return air

thermistor connector

connection OK?

[Detective return air thermistor]

Outdoor unit

Red LED

Green LED

YES YES

Correction

● Display condition

If a temperature of –50ºC or lower is detected continuously for 5 seconds or longer by the thermistor, the compres-

sor stops. After a 3 minute delay, the compressor restarts. If this state is detected again within 60 minutes after the

first detection.

Stays OFF

Keeps flashing

Is the return air

thermistor characteristics

OK or is there a

broken wire?

Defective return air thermistor Replacement

Defective indoor unit control PCB Replacement (Defective return air thermistor input circuit)

Note (1) Characteristics as per the above

graph.

Error display :

Red LED

Green LED

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

Indoor unit

1 time flash

Keeps flashing

[Heating overload]

Outdoor unit

Red LED

Green LED

Stays OFF

Keeps flashing

Is the air filter clogged?

Are the connections to

the indoor heat exchanger thermistor

OK?

Repair

YES

Clean it.

Are the characteristics of

the indoor heat exchanger thermistor

OK?

Defective indoor unit heat exchanger thermistor Replacement

● Abnormal Temperature Detection

Abnormal stop

Heating is

possible.

● Display condition

An abnormal stop occurs if this state is detected 5 times within 60 minutes of the

first detection, or if the overload state is detected continuously for 6 minutes.

Indoor unit heat exchanger temp. (˚C)

Error display :

Red LED

Green LED

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

Indoor unit

1 time flash

Keeps flashing

[Drain trouble]

Outdoor unit

Red LED

Green LED

Notes (1) Check if the overload state exists or not using the following check points.

Is there a short circuit? Is the indoor heat exchanger dirty or clogged? Is the outdoor unit’s fan control normal?

((

Is the indoor or outdoor air temperature too high?

(2) See the figure page 142 for indoor heat exchanger thermistor characteristics.

YES

Stays OFF

Keeps flashing

Check the remote controller for abnormal data.

Does the heating

overload state exist?

Check the cooling system.

YES

((

Adjust

Abnormal data check

in remote controller

Is there any

overflow?

YES

Drain motor ON from

remote controller.

operation

YES

Is drain

piping unclogged?

Is the slop OK?

YES

DM check

DC 12 V

at both terminals

of CNI?

YES

Float switch check

Correction

Replacement indoor

unit PCB

AC 220/240 V

at both terminals

of CNR?

YES

DM check of

motor wiring

Replacement indoor

unit control PCB

Error display :

Red LED

Green LED

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

e10

Indoor unit

Stays OFF

Keeps flashing

[Control of 1 remote controller VS multiple units Excessive number of units (more than 17 units) ]

Outdoor unit

Red LED

Green LED

Stays OFF

Keeps flashing

Are more

than 17 units connected

to a remote

controller?

Defective indoor unit control PCB Replacement

Error display :

Red LED

Green LED

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

e16

Indoor unit

Keeps flashing

[Fan motor abnormalities]

Stays OFF

YES

Red LED

Green LED

Reduce to 16 units or less

Outdoor unit

S Only case of FDTA501, 601 types

Stays OFF

Keeps flashing

Abnormal data check

with remote controller

After check reset,

fan runs on weak.

Fan ON?

CNM1

1 and 3 (Red – White)

DC280V?

CNW9

1 and 3

DC15V?

DC 15V

between CNW9- 3 and

CNM2 4 ?

Does the

fan motor turn

smoothly by

hand?

Is the voltage

at CNM2 3 DC 1V

or higher?

White is GND.

YES YES

3 is GND.

YES

Note (1) CNW9- 3 is GND.

YES

(2)

(1)

YES

Note (2) CNW9- 3 is GND.

Replacement indoor

unit power supply PCB

side of transformer

Replacement transformer

Replacement indoor

unit control PCB

Detective fan motor

Secondary

(red-red) 15V

or more

YES

Was it reproduced?

YES

When the

motor is turning, does

the voltage at CNM2 2

fluctuate between

0 ~ 15 V?

YES

Replacement indoor

unit control PCB

Check the

circumstances.

● Display conditions

If an indoor unit fan motor’s speed is detected to be less than

200 rpm continuously for 30 seconds, the fan motor stops for 2

seconds. After 2 seconds, it starts again, but this occurs 4 times

within a period of 1 hour.

Replacement indoor

unit control PCB

S Only case of FDKN

Only case of 151~251 types

Abnormal data check

with remote controller

After check reset,

fan runs on Me.

3 (Black) is GND.

CNM

1 and 3 (Red – Black)

DC280V?

YES YES

3 (Black) is GND.

CNM

4 and 3 (White-Black)

DC15V?

YES

Does the

fan motor turn

smoothly by

hand?

YES

Is the voltage

at CNM 5 (Yellow) DC 1V

or higher?

Replacement indoor

unit control PCB

(2)

Note (2) CNM 3 (Black) is GND.

Replacement indoor

side of transformer

Replacement transformer

Detective fan motor

YES

unit control PCB

Secondary

(red-red) 14V

or more

Fan ON?

YES

Was it reproduced?

YES

When the

motor is turning, does

the voltage at CNM 6 (Blue)

fluctuate between

DC 0 ~ 15 V?

Replacement indoor

unit control PCB

(1)

YES

Note (1) CNM 3 (Black) is GND.

Check the

circumstances.

● Display conditions

If an indoor unit fan motor’s speed is detected to be less than

200 rpm continuously for 30 seconds, the fan motor stops for 2

seconds. After 2 seconds, it starts again, but this occurs 4 times

within a period of 1 hour.

Only case of 301 type

CNM

1 and 4 (Red-Blue)

DC 0~60V ?

Turn the power off and wait a short time (30 min. ~ 1 hr.)

YES

When tried again,

the fan goes ON.

YES

Replacement indoor

unit control PCB

3 (black) is GND.

YES

Replacement fan

motor

Check the

circumstances.

After check reset,

fan runs on Me.

Fan ON ?

YES

Was it reproduced?

YES

When

the motor is turning,

does the voltage at CNM 5

(White) fluctuate between

DC 0 ~ 15 V?

YES

Replacement indoor

unit control PCB

(1)

Note (1) CNM 4 (Blue) is GND.

Check the

circumstances.

Replacement fan

motor

● Display conditions

If an indoor unit fan motor’s speed is detected to be less than

200 rpm continuously for 30 seconds, the fan motor stops for 2

seconds. After 2 seconds, it starts again, but this occurs 4 times

within a period of 1 hour.

Error display :

e28

[Directive remote controller thermistor.]

Indoor unit

Red LED

Green LED

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

Is the remote controller thermistor connector connection OK?

Resistance-temperature characteristic of remote controller thermister

Temperrature(°C)

Resistance value (kΩ)

Stays OFF

Keeps flashing

Correction

YES

Temperrature(°C)

Red LED

Green LED

Resistance value (kΩ)

Outdoor unit

Stays OFF

Keeps flashing

Are characteristics of remote controller thermistor OK or is there any broken wire?

Detective remote controller thermistor Replacement

Temperrature(°C)

YES

Resistance value (kΩ)

9.9

9.2

Detectivie remote controller PCB Replacement (Detective remote thermistor input circuit)

Temperrature(°C)

Resistance value (kΩ)

8.5

7.8

7.3

6.7

6.3

5.8

5.4

5.0

(4) Error diagnosis procedures at the outdoor units side

At the error diagnosis related to the outdoor unit, check at first the error code of remote controller and the illumination patterns of norma1 and inspection display lamps in the same manner as the case of indoor unit. Then estimate the outline, the cause and the location of error based on the pattern and proceed to the inspcetion and repair. Since the self diagnosis function by means of the microcomputers of indoor/outdoor units provide the judgement of error of microcomputers them selves irregularity power supply line, overload, etc. caused by the installation space, inadequate volume of refrigerant etc., the location and cause of trouble will be discovered without difficulty. In addition, the display lamps error code of indoor/outdoor unit is kept flashing, (except when the power supply is iterrupted) after the irregularity is automatically recovered to give irregularity information to the service presonnel. If any mode of higher priority

than the error retained in memory occurs after the reset of error, it is switched to that mode and saved in the memory.

(a) Replacement parts assembly related to the outdoor unit controller

Outdoor unit PCB, power transistor module, capacitor, noise filter, thermistor, (heat exchanger, discharge pipe, outdoor temperature, power transistor), fuse, transformer, etc.

(b) Replacement procedure of outdoor unit microcomputer printed circuit board.

Microcomputer printed circuit board can replaced with following procedure.

1) Confirm the parts numbers. (Refer to the following parts layout drawing for the location of parts number.)

Parts No. PCA505A080Z PCA505A065ZN PCA505A065ZS

FDCVA151HEN, 201HEN, 251HEN FDCA301HEN, 401HEN FDCA301HES, 401HES, 501HES, 601HES

Applicable Model

2) Set the model using the model setting switch (SW6). (In the case of the 151~251 only). Switch Setting Table (All switches are set in the OFF position when shipped from the factory.)

Model

151 201 251

Switch Setting Table

Set the switches ON or OFF for each switch No.

( ON, OFF)

1 2 3 4

3) Set the overcurrent value using the overcurrent setting switch for CM (SW3). (In the case of the 301~601 only) Switch Setting Table (All switches are set in the OFF position when shipped from the factory.)

Model

Setting Value (A)

Switch Setting Table

Set the switches ON or OFF for each switch No.

( ON, OFF)

301HEN 301HES 401HEN

17 2710

1 2 3 4 5 6

401HES 501HES 601HES

11 1412

1 2 3 4 5 6

4) Set the control select switch to match the previously set settings on the previous board. If the previously set settings were set with jumper wires, the control select switch should be set in the ON position if there

was a jumper wire and in the OFF position if there wasn’t a jumper wire.

5) Connect the faston terminals and connectors to the control board. When connecting the wires to the faston terminals, connect each wire to the terminal printed with the same color on the board.

Note (1) When connecting the faston terminals to the control board, connect them so that there is no deformation of the far end of the circuit board.

Parts layout on the outdoor unit PCB S FDCVA151~251 type

Sub PCB

(Noise filter)

Reactor

Fan motor

Stepping motor

CNI

Power transistor thermistor

(Tho-IPM)

● Change by the jumper wire

Model

JA1 (SW7-1) JA5 (SW6-1) JA6 (SW6-2) JA7 (SW6-3) JA8 (SW6-4)

151 201 251

None

With

None

With

CNM

CNQ

SW7

SW6

DIP switch

(SW6)

None

Notes (1) “None” means that jumper wire is not provided on the PCB or the connection is cut

None

Notes (2) The replacement PCB is not equipped with jumper wires JA1 and JA5~JA8. Instead, SW6 and 7

None

With With

are mounted in the same position and have the same functions as jumper wires JA1 and JA5~JA8.

Carry out the local settings in accordance with the table using SW6 and 7.

CNI2CNV1

CNW

CNI3

CNL CNTR

CNE

DIP switch

(SW7)

Outdoor air temp. thermistor, Outdoor heat exchanger themistor, Discharge pipe thermistor (Tho-A, Tho-R, Tho-D)

● Function of DIP switches (SW5) (Usually all turned OFF)

Switch Function

SW5-1

SW5-2

SW5-3

SW5-4

Defrost Setting Select For cold regions.

OFF

Normal

Snow-guard fan control-Effective

Snow-guard fan control-Invalid

OFF

Low refrigerant protection control-Effective

OFF

Low refrigerant protection control-Invalid

Test run operation-Heating

OFF

Test run operation-Cooling

External PCB

SW5 SW9

Test run operation switch

SW9

SW5

1234

CNQ1

● Change by the JA3

Switch Function

with

JA3

(SW7-3)

Model selection-Energy saving

None

Model selection-Standerd

Note (1) “None” means that jumper wire is not provided on the

PCB or the connection is cut.

S FDCA301~601 type

Outdoor air thermistor, Outdoor heat exchanger thermistor, Discharge pipe thermistor

(Tho-A, Tho-D, Tho-R1, 2)

SW3

SW6

SW5

SW4

SW2

(Test run operation switch)

SW5

L11

CNL

1234

CT1

SW6

J8J7J6

L12

Stepping motor

C13

IC12

L7 C6

L10

C10

SW3

J14

J13

J12

J11

J15

J16

SW4

J4J3J2

CT2

Fan motor

PCB power supply connector (Secondary side)

CNA2

Outdoor unit power supplly

CNV1

X07 X05 X01 X06

CNS CNO

CNQ

CNE

X04 X03 X02

HT1

CNM3

CNM4

C11

C12

LED-R

LED-G

SW2

KN1

CNM1

CNM2

CNW

PCB power supply connector (Primary side)

CNA1

High pressure switch

(63H1)

CNRCNP3CNP1CNP2

KN2

Crankcase heater

Magnetic contactor

(52C)

4 way valve

Capacitor for FMo

● Change by the jumper wire ● Function of DIP switches (SW5) (Usually all turned OFF)

Switch Function

(SW4-1)

(SW4-2)

(SW6-2)

(SW6-3)

(SW6-4)

1 Phase

with

(1)

None

3 Phase Cooling

with

(1)

None

Heating Defrost recovery temperature 14ºC

with

(1)

Defrost recovery temperature (See page 88)

None

Defrost prohibited temperature 45 min.

with

(1)

Defrost prohibited temperature 37 min.

None

(1)

None

Switch Function

SW5-1

SW5-2

SW5-3

SW5-4

Defrost Setting Select For cold regions.

Normal

OFF

Snow-guard fan control-Effective

Snow-guard fan control-Invalid

OFF

Low refrigerant protection control-Effective

Low refrigerant protection control-Invalid

OFF

Test run operation-Heating

Test run operation-Cooling

OFF

● Overcurrent Setting

Notes (1) “None” means that jumper wire is not provided on the

PCB or the connection is cut

Notes (2) The replacement board is not equipped with jumper

wires JA1~JA8. Instead, SW4 and 6 are mounted in the same position and have the same functions as jumper wires JA1~JA8. Carry out the local settings in accordance with the above table using SW4 and 6.

Model

Setting Value (A)

J11 (SW3-1) J12 (SW3-2) J13 (SW3-3)

301HEN17301HES10401HEN27401HES11501HES12601HES

With

With None None

(1)

None None

(1)

With

None

With

(1)

With

None

With

(1)

With With

None

With With

(1)

With

Notes (1) “None” means that jumper wire is not provided on the PCB or the

connection is cut

Notes (2) The replacement board is not equipped with jumper wires J11~J13.

Instead, SW3 is mounted in the same position and has the same functions as jumper wires J11~J13. Carry out the local settings in accordance with the above table using SW3.

(3) The overcurrent setting value becomes the above setting value (A)

automatically in accordance with the settings on J11(SW3-1) ~ J13(SW3-3) and J1(SW4-1).

Red

White

Y/NG

LED1

Red

T1 T5

Red

White

Black

Orange

Yellow

UVW

T6 T7 T8

F2 (250V 20A)

CnTR

Control PCB

Power transistor module

CNI3 T2 T4

DC280V

F3 (250V 1A)

(

20A

)

4321

CNI2

T21

T22

Sub PCB

(Noise filter)

T24

T25

T26

T30 T27T28CNI1

Orange

Gray To indoor unit

Brown

Temperature

[

]

(

˚C

)

80˚C

100

Thermistor resistance (kΩ)

[

80˚C

]

Thermistor resistance (kΩ)

[

80˚C

]

0 20 50 80 100 120

Power transistor thermistor temperature and resistance characteristics check

Power transistor module check: Is there a short circuit, open circuit or damage? (See 160 page for the check procedure.)

DC Reactor Continuity Check: 50 mΩ or higher, less than 100 mΩ.

Fuse Check: There should be continuity. If faulty, replace the control PCB.

When the outdoor unit fan motor is abnormal: (Refer to page 157)

Noise Filter Check: There should be continuity. There should be no shorts between phases.

LED1 (Red) Check Light continuously :

Keeps flashing : 1~3 time flash :

Normal EEV Refer to 131 page

Power Supply Check Measure the power supply at L.N. (It is normal if it is AC 220/240V.)

❇

Fuse Check: There should be

continuity.

●

Outdoor unit check points

Check items with the *mark when the power is ON.

Outdoor Unit controller failure diagnosis circuit diagram

FDCVA151~251 type

Error display :

[Communications error during operation]

Indoor unit

Red LED Green LED

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

Is the connection

of the signal wires at the

outdoor unit poor?

YES

Repair Repair

Notes (1) Check for poor connections (disconnection, looseness) on the outdoor unit’s terminal block.

(2) Check for poor connections or disconnection of the signal lines between the indoor and outdoor units.

Red LED Green LED

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

Reset power supply.

2 time flash

Keeps flashing

(1) (2)

Indoor unit

Is the connection

of the signal wires at the

indoor unit poor?

YES YES

2 time flash

Keeps flashing

Did it return to normal?

Red LED Green LED

Outdoor unit

Reset power

supply.

Outdoor unit

2 time flash

Keeps flashing

Did the remote

controller’s LCD return

to normal?

The unit is normal.

Malfunction was due to transient noise, etc.

Stays OFF

Keeps flashing

YES

(The outdoor unit’s CPU went out of control due to noise during power on.)

Malfunction is due to noise, etc.

“ WAIT ”

Go to display diagnosis (page 140).

Error display :

Red LED Green LED

e32

Indoor unit

Stays OFF

Keeps flashing

Are the power supply

phases reversed?

Are the connections

to the reverse phase detection

circuit lines correct?

YES

[Power supply phases reversed] [Only case of 301~601 type]

Outdoor unit’s control PCB is faulty. (Network communications circuit is faulty.) Replace

Outdoor unit

1 time flash

Keeps flashing

YES

Red LED Green LED

Repair

Outdoor unit’s control PCB is faulty.

Replace

(Reverse phase detection circuit is faulty.)

Error display :

e33

[Inverter primary current abnormal] [Only case of 151~251 type]

Indoor unit

Red LED Green LED

Is the power supply normal?

Is the voltage within

the specified range?

Is there any foreign matter

such as dust or dirt on the control

PCB soldered surfaces?

Replace the control PCB.

Stays OFF

Keeps flashing

YES

Red LED

Restore it to the

normal state.

Restore it to the

normal state.

Remove any foreign matter

such as dust or dirt.

Outdoor unit

1 time flash

● Display Conditions

If the inverter’s primary current exceeds the set value for 3 sec-

onds, the compressor stops. After a 3 minute delay, it restarts, but

when this occurs 5 times within 60 minutes.

[Compressor overcurrent trouble] [Only case of 301~601 type]

Outdoor unit

1 time flash

Keeps flashing

Red LED Green LED

Indoor unit

Stays OFF

Keeps flashing

Red LED Green LED

Is the voltage

AC220/240V between the

L1 and L3 phases and between the L2

and L3 phases on the 52C

secondary side?

YES

Is there overcurrent

at the compressor?

Outdoor unit control PCB is faulty. Replace (The CT input circuit is faulty.)

(1)

YES

Out of phase between the

L1 and L2 phases.

•

Is the power supply voltage proper? (Isn’t it too low?)

•

Are the power lines proper? (Aren’t they too thin?)

•

Is the overcurrent setting correct? (SW3 setting)

•

Is the compressor running with an overload?

• Is the compressor locked?

Notes (1) Measure the overcurrent value to make sure.

Also make sure the overcurrent setting set with SW3 and SW4-1 on the outdoor unit control PCB

is not incorrect.

• 52C is faulty.

• There is a disconnection between

52C and CM or in the L1 and L2 phases between TB1 and 52C.

Check the unit side.

• During cooling: Is FMo turning?

• During heating: Is FM

Is the service valve (gas side) fully open? Is the filter clogged?

• Is there an overcharge?

• Is the installation space for the indoor and

outdoor units proper?

•

Is there a short circuit in the indoor or outdoor units?

• Compressor is faulty. Replace

turning?

Error display :

[Open phase at L3 phase of 52C secondary side] (Only case of 301~601 type)

e34

Indoor unit

Red LED

Green LED

secondary side L3 phase

52C

open?

Stays OFF

Keeps flashing

(1)

Red LED

Green LED

YES

(2)

Outdoor unit

Repair

The outdoor unit control PCB is faulty. (The CT circuit is faulty) Replace

Error display :

Indoor unit

Red LED Green LED

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

Are the

characteristics of the

outdoor heat exchanger thermistor

normal?

[Cooling overload operation]

e35

Stays OFF

Keeps flashing

YES

Red LED Green LED

Is there cooling overload operation?

Outdoor unit

Replace the outdoor heat exchanger thermistor.

Is the unit normal?

Abnormal Temperature Detection

Error stop

Is high pressure control normal?

Abnormal temperature detection Is it (the actual measurement) correct?

The outdoor control PCB is faulty. Replace

Return

1 time flash

Keeps flashing

Notes (1) Also check if there is voltage at the L3 phase on the 52C primary

side, but no voltage on the secondary side (coil wire disconnec-

tion or faulty contacts).

(2) If there is voltage at the L3 phase on the 52C primary side and it

is not abnormal, the outdoor unit control PCB is faulty.

AAA

AAAAAAAAAAAAAAAAAAAAAAAA

If the unit is operated with the service valve closed, 49C (internal thermostat) operates. E34 may also be displayed. Check the service valve.

AAAAAAAAAAAAAAAAAAAAAAAA

1 time flash

Keeps flashing

Check the unit side.

• Is there a short circuit in the outdoor unit?

• Is the installation space proper?

• Is the refrigerant level too high?

• Is the heat exchanger dirty or clogged?

(1)

The compressor’s speed drops when all the following conditions are met

(151~251). In the case of the 301~601, expansion valve control is performed.

Outdoor heat exchanger temperature: A˚C or higher

Outdoor air temperature: 41ºC or higher

The outdoor unit’s fan runs at 7 speed (UHi) 30 seconds or longer.

(2) Control is cancelled when the temperature drops to BºC or lower.

Model

less than 88

88 to less than 108

108 or higher

151~251 type

Compressor

speed

(rps)

301~601 type

Note (1) Values in ( ) show for the case of the 301~601 models.

Item

(1)

continuously for

58.5

53.5

48.5

53.5

48.5

43.5

AAA

(1)

48 65

Outdoor air temp. (ºC)

Note (1) In the case of the 151 ~

251, the abnormal stop temperature differs depending on the compressor’s speed.

Compressor speed

(rps)

less than 88

88 to less than 108

108 or higher

Indoor heat exchanger temprature (˚C)

65 or more

60 or more

55 or more

● Display Conditions

If the outdoor heat

exchanger temperature

becomes 65ºC 5 times

within 60 minutes,

including while the

compressor is stopped,

or if it continues at that

temperature for 10

minutes or longer.

Outdoor unit heat exchanger themistor (Tho-R) Resistancetemperature characteristics

(kΩ)

Resistance

010 304020 50

5kΩ at 25°C

Temperature (°C)

Error display :

[Discharge temperature error]

e36

Indoor unit

Red LED Green LED

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

Is the

discharge pipe ther-

mistror characteristics

normal?

Stays OFF

Keeps flashing

Discharge temperature error?

YES

(At cooling/heating operation)

Red LED Green LED

Outdoor unit

1 time flash

Keeps flashing

Check the unit side.

Insufficient refrigerant Charge the refrigerant (measure) Is it the oveload operation?

Discharge pipe thermistor replacement

Is the unit

normalized

Is discharge temperature

control normal?

Abnormal temperature sensed

Is the (actual measurement) normal?

Defective outdoor unit PCB Replacement

● Display conditions

If the discharge temperature is as shown at left 2 (5) times within 60

minutes, or continuously for 60 minutes, including when the com-

pressor is stopped.

Note (1) Values in ( ) show for the case of the 301~601 models.

Abnormal Temperature Detection

151~251 type 301~601 type

Error stop Error stop

Operoble Operoble

80 105

Discharge pipe temp. (°C) Discharge pipe temp. (°C)

80 121

● 151~251 type

Temperature-resistance characteristics of discharge pipe thermistor (Tho-D)

100

Thermistor resistance

Check the unit side.

During cooling: Is FM0 operating? During heating: Is FM1 operating?

Are service valves (both liquid, gas) fully opened during both

cooling and heating. Is the installation space of indoor/ outdoor unit adequate? Is there any short circuit air flow for indoor/outdoor units?

If the discharge pipe temperature exceeds the set value, the compressor’s speed (151~251) or the expansion valve’s opening angle (301~601) is controlled to prevent the discharge pipe temperature from rising.

Compressor control

Hold

Release

151~251 type 301~601 type

80 90 90

Discharge pipe temperature (°C)

● 301~601 type

100

80°C] <

(kΩ)

Temperature [T] (°C) Temperature [T] (°C)

140120100806040200

Thermistor resistance

The compressor’s capacity is lowered (Each minute the speed is reduced (151~251).

Expansion valve control (301~601)

100

Temperature-resistance characteristics of discharge pipe thermistor (Tho-D)

T<80˚C

0 50 80 100

T>80˚C

80°C] >

(kΩ)

Thermistor resistance

Error display :

Indoor unit

Red LED Green LED

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

Is the outdoor

unit heat exchanger

thermistor connector

OK?

Repair

[Defective outdoor unit heat exchanger thermistor]

e37

Outdoor unit

Stays OFF

Keeps flashing

YES

Red LED Green LED

Are the outdoor unit

heat exchanger thermistor

characteristics OK, is there

any broken wire?

Defective outdoor unit heat exchanger thermistor Replacement

● Display conditions

If the temperature sensed by the thermistor is –30ºC or lower con-

tinuously for 5 seconds between 2 minutes and 2 minutes 20 seconds

after the compressor goes ON, the compressor stops. After a 3 minute

delay, the compressor restarts. If this state is detected 3 times in 40

(60) minutes.

Note (1) Values in ( ) show for the case of the 301~601 models.

1 time flash

Keeps flashing

Defective outdoor unit control

YES

PCB Replacement (Defective outdoor unit heat exchanger thermistor input circuit)

Outdoor unit heat exchanger thermistor (ThO-R) Resistance temperature characteristics

)

Ω

Resistance

010 304020 50

5kΩ at 25°C

Temperature (°C)

Error display :

[Defective outdoor air temperature thermistor]

e38

Indoor unit

Red LED

Green LED

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

Is the outdoor

air temperature thermistor

connector connection

OK?

Repair

Stays OFF

Keeps flashing

YES

Red LED

Green LED

air temperature thermistor

characteristics OK, is there

Defective outdoor air temperature thermistor Replacement

Outdoor unit

1 time flash

Keeps flashing

Is the outdoor

no broken wire?

● Display conditions

If the temperature sensed by the thermistor is –30ºC or lower continu-

ously for 5 seconds between 2 minutes and 2 minutes 20 seconds after

the compressor goes ON, the compressor stops. After a 3 minute delay,

the compressor restarts. If this state is detected 3 times in 40 (60) min-

utes.

Note (1) Values in ( ) show for the case of the 301~601 models.

Defective outdoor unit control PCB

YES

Replacement (Defective outdoor air temperature thermistor input circuit)

400

300

(kΩ)[T<0°C]

200

Thermistor resistance

100

---50

Temperature-resistance characteristics of outdoor air temperature thermistor (ThO-A)

T < 0°C

T > 0°C

050

Temperature [T](°C)

(kΩ)[T>0°C]

Thermistor resistance

Error display :

Indoor unit

Red LED Green LED

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

Is the discharge pipe thermistor

connector connection

OK?

Repair

Keeps flashing

[Defective discharge pipe thermistor]

e39

Outdoor unit

Stays OFF

YES

Red LED Green LED

Are the discharge

pipe thermistor characteristics

OK, is there no

broken wire?

Defective discharge pipe thermistor Replacement

● Display conditions

If the temperature sensed by the thermistor is –10ºC or lower con-

tinuously for 5 seconds between 10 minutes and 10 minutes 20

seconds (2minutes and 2minutes 20seconds) after the compressor

goes ON, the compressor stops. After a 3 minute delay, the com-

pressor restarts. If this state is detected 3 times in 40 (60) minutes.

Note (1) Values in ( ) show for the case of the 301~601 models.

1 time flash

Keeps flashing

YES

80°C]

(kΩ)

Thermistor resistance

Defective outdoor unit control PCB Replacement (Defective discharge pipe thermistor input circuit)

Temperature-resistance characteristics of discharge pipe thermistor (Th

O-

100

80°C

05020 80 100 120

Temperature [T] (°C)

80°C]

80°C

(kΩ)

Thermistor resistance

Error display :

[63H1 operation] (Only case of 301~601 type)

e40

Outdoor unit

YES

Red LED Green LED

Indoor unit

Stays OFF

Keeps flashing

Is the 63H1 operating?

The outdoor unit control PCB is faulty. (The 63H1 input circuit is faulty.) Replace

Red LED Green LED

[Open phase at L3-phase of 52C primary side]

Indoor unit

Red LED Green LED

primary side L3 phase

The outdoor unit control PCB is faulty. Replace

Stays OFF

Keeps flashing

52C

open?

(1)

Red LED Green LED

YES

(2)

Outdoor unit

Repair

1 time flash

Keeps flashing

While the 63H1 is operating

1. During Cooling

• Is the outdoor unit fan motor running?

• Is there a short circuit in the outdoor unit?

• Is there enough space for inlet and outlet?

2. During Heating

• Is the indoor unit heat exchanger thermistor separated

from the sensing case?

• Is the filter clogged?

3. During Cooling and Heating

• Is the refrigerant overcharge?

• Is the service valve fully open?

1 time flash

Keeps flashing

Notes (1) Also check if there is voltage at the L3 phase on the 52C primary

side, but no voltage on the secondary side (coil wire disconnection

or faulty contacts).

(2) If there is voltage at the L3 phase on the 52C primary side and it is

not abnormal, the outdoor unit control PCB is faulty.

Error display :

Red LED Green LED

Is the power

supply voltage

proper?

Check the power supply.

e42

Indoor unit

Stays OFF

Keeps flashing

YES YES YES YES

● Display conditions

If the inverter’s output current ex-

ceeds the set value, the compres-

sor stops. After a 3-minute delay, it

restarts, but if this occurs 3 times

within 20 minutes.

• Is the installation space for the indoor and outdoor

• Is there a short circuit in the indoor or outdoor

• During cooling: Is FMo operating?

• During heating: Is FMI operating?

• Is liquid flowing back to the compressor?

• Is the compressor making abnormal noises?

[Current cut] (Only case of 151~251 type)

Outdoor unit

1 time flash

pressure during operation

Check the refrigerant level and refrigerant circuit.

valve fully open?

units proper?

units?

Red LED

Is the service

Open it fully.

Check the

power transistor module

(See page 160)

Is the service valve fully open?

Is the service valve fully open? Is the filter clogged?

Is the high

proper?

Check the compressor's insulation resistance and winding

resistance.

Replace the compressor.

Replace the outdoor unit control PCB.

Does it return to

normal if the power

supply is reset (2 of 3 times)?

YES

It may be malfunction due to transient noise. If there is a noise source nearby, take measures to eliminate it.

NOYES

Replace the outdoor unit control PCB.

Error display :

e47

[Inverter over-voltage trouble] (Only case of 151~251 type)

Red LED Green LED

such as dust or dirt on the soldered

Error display :

Red LED Green LED

Indoor unit

Stays OFF

Keeps flashing

Is there foreign matter

surfaces of the control PCB?

Is the fuse (F1: 250V, 20A)

blown?

The outdoor unit control

PCB is faulty. Replace

e48

Indoor unit

Stays OFF

Keeps flashing

Outdoor unit

1 time flash

YES

Red LED

Remove the foreign matter such as dust and dirt.

Replace

● Display Conditions

If the inverter voltage exceeds 340V, (3 times in 20 min-

utes), this error is displayed. After 3 minutes passes, it

can be reset using the remote controller.

[DC Fan motor abnormal] (Only case of 151~251 type)

Outdoor unit

Red LED

1 time flash

Is any foreign

object wedged into the

rotating parts of the

fan motor?

Remove the foreign object.

YES

Turn the

fan by hand several

revolutions. Does itturn

smoothly?

Replace the fan motor.

YES

Is there

foreign matter

such as dust or dirt on

the soldered surfaces

of the control

PCB?

Remove the foreign mater such as dust or dirt.

YES

Is fuse F3

(250V, 1A)

blown?

Replace the fuse.

● Display conditions

When the DC fan motor’s output is ON, if the fan motor’s speed drops to 75 rpm or lower continuously

for 30 seconds or longer, the compressor stops. After a 3-minute delay, the compressor is restarted, but

if this state is detected 5 times within 60 minutes.

Error display :

Red LED Green LED

Indoor unit

Keeps flashing

[52C Abnormal] (Only case of 301~601 type)

e52

Outdoor unit

Stays OFF

Red LED Green LED

Lights contiously

Keeps flashing

YES

Replace the outdoor unit control PCB.

Is E52

Cooling operation

E52 Heating operation

displayed in the remote

controller’s

screen?

YES

The 52C is abnormal.

Error display :

[Power transistor thermistor faulty.] (Only case of 151~251 type)

e56

Indoor unit

Red LED Green LED

Is the

power transistor thermistor

connector connection

OK?

Repair

Stays OFF

Keeps flashing

YES

Red LED

thermistor characteristics

Defective power transistor thermistor Replacement

Outdoor unit

Are the

power transistor

OK, is there no

broken wire?

● Display conditions

If the temperature sensed by the thermistor is –10ºC or lower con-

tinuously for 5 seconds between 10 minutes and 10 minutes 20

seconds after the compressor goes ON, the compressor stops. Af-

ter a 3 minute delay, the compressor restarts. If this state is de-

tected 3 times in 40 minutes.

1 time flash

YES

80°C]

(kΩ)

Thermistor resistance

Defective outdoor unit control PCB Replacement (Defective power transistor thermistor input circuit)

Temperature-resistance characteristics of power transistor thermistor (Th

100

80°C

05020 80 100 120

Temperature [T] (°C)

O-

80°C]

80°C

(kΩ)

Thermistor resistance

Error display :

Indoor unit

Red LED Green LED

Note (1) The green LED in the outdoor unit is used in the FDCA301 ~ 601 models only.

Is the service valve

opened fully?

connections of the connectors

to the indoor heat exchanger and return

air thermistor OK?

characteristics of the indoor

heat exchanger and return air

thermistor OK?

Is the low pressure during

operation normal?

Keeps flashing

YES

Are the

YES

Are the

YES

[Insufficient refrigerant volume.]

e57

Stays OFF

Red LED Green LED

Fully opened.

Normal

Indoor heat exchanger and return air thermistor faulty Replace

Charge with refrigerant.

Outdoor unit

1 time flash

Keeps flashing

Return air thermistor (ThI-A) Indoor unit heat exchanger thermistor (Th

I-R1, R2)

Resistance temperature characterisics

(kΩ)

Resistance

010 304020 50

5kΩ at 25°C

Temperature (°C)

YES

Indoor control PCB faulty Replace (The indoor heat exchanger and return air thermistor input circuits are faulty.)

● Display conditions

If insufficient refrigerant protection (See page 92) is implemented

3 times within 30 minutes.

e59

[Abnormalities in compressor starting] (Only case of 151~251 type)Error display :

Indoor unit

Red LED Green LED

Is the power

supply voltage

correct proper?

NO NO

Check of power supply

Note (1) If the test operation is repeated 2 or 3 times, the liquid re-

frigerant inside the compressor may be expelled from the compressor may recover from its starting abnormality.

Stays OFF

Keeps flashing

YES

Is the balance

pressure appropriate

during starting?

Check the refrigerant level and refrigerant circuit.

Red LED

YES

Outdoor unit

1 time, 2 time, 3 time flash

Check

the compressor’s

insulation resistance

and winding

resistance.

Replacement

compressor

Check of

power transistor

module

(Reference to 160)

Inverter OK

Carry out test operation

(starting) another 2 or 3 times.

Did it improve?

Replacement

compressor

Inverter

(1)

● Display conditions

(1) If it won’t start 2 times out of 7 attempted starts.

(2) Remote controller reset is possible after 3 minutes have passed.

Replacement

control PCB

[Compressor loader position detection error] (Only case of 151~251 type)Error display :

Red LED Green LED

Note (1) Check if the power supply system is normal.

Again

Operation

Does the compressor

start?

NO (E59) It does. It does.

E59 diagnosis E42 diagnosis Compressor check

e60

Indoor unit

Stays OFF

Keeps flashing

YES

Red LED

Does E42 occur?

Outdoor unit

doesn’t.

1 time flash

Does the

compressor make

any abnormal

noise?

doesn’t.

return to normal

Does it

when the power

is reset?

E60 recurs.

Replacement

control PCB

It doesn’t

recur.

It is possible that transient noise could be causing malfunction. If there is a noise source, take countermeasures to prevent it.

● Display conditions

(1) If a rotor position detection operation is conducted, then the rotor position cannot be detected again after that (4 times in 15

minutes), an abnormal state is displayed.

(2) After 3 minutes passes, it is reset with the remote controller is possible.

Power transistor module (including drive circuit) check method

Is the power

transistor module

cracked or burnt?

YES

Is there a

short circuit between the

power transistor module

terminals?

Compressor operation

Is the balance

between the compressor

current phases good?

YES

Normal

❇

If there is a 10% or greater difference in the current in different phases. (except during acceleration or deceleration)

Replacement

control PCB

❇

1 Power transistor module terminal short circuit check procedure

Disconnect the compressor wiring, then conduct a short circuit check.

P-U, P-V, P-W

N-U, N-V, N-W

Check between the P-N terminals.

Bring the tester probes in contact with the following places on each terminal.

P: Power transistor P terminal, U: End of red harness to compressor

N: Power transistor N terminal, V: End of white harness to compressor

W: End of black harness to compressor

(4) Check abnormal operation data with the remote controller

Operation data are recorded when there is an abnormal state and these data can be displayed in the remote controller by

operating the remote controller buttons.

(1) Press the CHECK button.

The display will change from “

(2) Press the

button once. The display will change to “ERROR DATA

FUNCTION” → “

SET ” → “OPERATION DATA ”

”.

(3) Press the SET button to enter the abnormal operation data display mode.

(4) If there are abnormalities from the past, they will be displayed by an error code and unit No.

(Example) “E8” (Lighted up)

“I/U No. 00

” (Flashing)

(5) Using the or button, select the indoor unit No. you want to display the error data for.

If only one indoor unit is connected, the indoor unit No. does not change.

(6) Fix the selection using the SET button. (The displayed indoor unit No. will change from flashing to light up continuously.)

(Example) “E8”

“DATA LOADING” (This message flashes while data are being read.)

↓

“E8”

“ERROR DATA

”

The data are then displayed beginning with item No. 01.

Displayed items are as shown below.

(7) Display the other data for when the error occurred in order from the currently displayed operation data No. 01 using

or button.

the

❇

Depending on the model, items for which corresponding data do not exist are not displayed.

(8) To change the indoor unit, press the AIR CON No. button and return to the indoor unit selection display.

(9) Press the ON/OFF button to end the abnormal operation data check.

If you press the RESET button during the settings, the display returns to the previous setting screen.

No. Data item

01 Operation mode (Example: ) 02 SET TEMP. 27°C 03 RETURN AIR 28°C 04 I/U HEAT EXCH1 6°C 05 I/U HEAT EXCH2 5°C 07 I/U FAN Hi

11 TOTAL I/U RUN 10500H 21 OUTDOOR 35°C 22 O/U HEAT EXCH1 55°C 23 O/U HEAT EXCH2 55°C 24 COMP HERTZ 85.0Hz 26 Lo PRESSURE 0.40MPa

27 DISCHARGE 98°C 28 DOME BOTTOM 56°C 29 CT 26A 31 O/U FAN Hi 32 SILENT MODE ON 34 63H1 ON/OFF

35 DEFROST OFF 36 TOTAL COMP RUN 8500H 37 EEV1 480PULS 38 EEV2 480PULS

OUTLINE OF OPERATION CONTROL BY MICROCOMPUTER

(1) Remote controller

(a) Wired remote controller

The figure 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 figure for the sake of explanation.

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

Pull the cover downward to open it.

Central control display

Displayed when the air conditioning system is controlled by the option controller.

Timer operation display

Displays the settings related to timer operation.

Temperature setting switches

These switches are used to set

the temperature of the room.

TIMER switch

This switch is used to select a timer mode.

Vent Indicator

Indicates operation in the Ventilation mode.

Weekly timer display

Displays the settings of the weekly timer.

Operation setting display area

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

Operation/Check indicator light

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

Operation/Stop switch

This switch is used to operate and stop the air conditioning system. Press the switch once to operate

the system and press it once again to stop the system.

MODE switch

This switch is used to switch between operation modes.

Timer setting switches

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

GRILL switch

This switch has no function. When this switch is pressed, (Invalid Operation) is displayed, but it does not mean a failure.

AIR CON No. (Air conditioning system No.) switch

Displays the number of the connected air conditioning system.

CHECK switch

This switch is used at servicing.

TEST switch

This switch is used during test operation.

*If you oress any of the switches above and " " is display, the switch has no function. But it does not mean a failure.

FAN SPEED switch

This switch is used to set the airflow volume.

VENT switch

Switch that operates the connected ventilator.

LOUVER switch

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

SET switch

This switch is used to apply the timer operation setting. This switch is also used to make silent mode operation settings.

RESET switch

Press this switch while making settings to go back to the previous operation. This switch is also used to reset the “FILTER CLEANING” message display. (Press this switch after cleaning the air filter.)

(2) Setting functions using the remote controller

(a) The factory settings of this unit's functions are as follows: If you want to charge a setting, follow the

procedure found in the installation manual and set to your desired setting.

For the method of setting, please refer to the installation manual of a remote control unit.

1 Remote controller unit functions ( FUNCTION )

Function

number A

Notes(1)

Function description

GRILLE SET

AUTO RUN SET

TEMP S/W

MODE S/W

ON/OFF

ON/OFF S/W

FANSPEED S/W

LOUVER S/W

TIMER S/W

SENSOR S/W

POWER FAILURE

COMPENSATION SET

VENTI SET

TEMP RANGE SET

I/U FA SPEED

MODEL TYPE

EXTERNAL CONTROL SET

ERROR DISP SET

POSITION

°C/°F SET

Setting marked with [] are the default setting.

(2)

Setting marked with [ according to an indoor unit or an outdoor unit connected. Please check default settings with the indoor unit's installation manual. When Item 17 : “ POSITION” is changed, please also

(3)

change Item 04 “ POSITION” setting found in “Indoor unit functions”.

Grille lift

()

panel setting

Remote control

()

sensor setting

Indoor unit

()

fan speed setting

Louver

()

control setting

INVALID

50Hz AREA ONLY

60Hz AREA ONLY

AUTO RUN ON

AUTO RUN OFF

VALID

INVALID

VALID

INVALID

ON/OFF

VALID

ON/OFF

INVALID

VALID

INVALID

VALID

INVALID

VALID

INVALID

INSENSOR OFF (Invalid)

SENSOR ON (Valid)

INVALID

VALID

NO VENTI

VENTI LINK SET

NO VENTI LINK

DISP CHARGE

NO DISP CHARGE

3 FAN SPEED

2 FAN SPEED

1 FAN SPEED

HEAT PUMP

COOLING ONLY

INDIVIDUAL OPERATION

SAME OPERATION FOR ALL UNITS

ERROR DISP

NO ERROR DISP

FIX (1 OF 4) (4 position stop)

IN MOTION (Free stop)

°C °F

] are those that are set automatically

Setting

Factory

setting

2 Indoor unit functions (I/U FUNCTION

Function

number A

Notes(1)

Function description

Hi CEILING SET

FILTER SIGN SET

POSITION

EXTERNAL INPUT SET

OPERATION PERMISSION PROHIBITED

ROOM TEMP OFF SET

(Heating room temperature off set)

FAN CONTROL

FREEZE PREVENT TEMP

FREEZE PREVENT CONTROL

Setting marked with [] are the default setting.

(2)

Setting marked with [ according to an indoor unit or an outdoor unit connected. Please check default settings with the indoor unit's installation manual.

Louver control

()

setting

Heating

()

fan control

] are those that are set automatically

Setting

STANDARD (Mild mode)

Hi CEILING 1

NO DISPLAY

AFTER 180H

AFTER 600H

AFTER 1000H 1000H→STOP

FIX (1 OF 4) (4 positiion stop)

IN MOTION (Free stop)

LEVEL INPUT

PULSE INPUT

NORMAL OPERATION

VALID

NORMAL OPERATION

TEMP SHIFT +3˚C

LOW FAN STOP→LOW FAN (Intermittent operation)

TEMP Hi

TEMP Lo

FAN CONTROL ON

FAN CONTROL OFF

(Powerful mode)

)

Factory

setting

(b) Function setting method

1) Stop the air conditioner

2) Press the SET and MODE buttons simultaneously

for 3 seconds or longer.

The screen display will be switched as follows:

SELECT ITEM”

“

“FUNCTION SET

SET"

”

Operating guide message Function description: B , Settting: C

AUTO RUN SET

Function number: A

Confirm Button

ON/OFF Button

FUNCTION SET

3) Press the SET button.

The unit will enter the function setting mode. The

screen display will charge to “

”.

4) Check which category your desired setting belongs to, “

FUNCTION " (Indoor unit function).

5) Press either

Select either “ FUNCTION ” or “I/U FUNCTION ”.

or button.

FUNCTION

6) Press the SET button.

When “

1 “DATA LOADING” (blinking)

“GRILLE SET” (Function number: A, Function description: B)

The screen display will be switched like this.

2 Press either

“Function number: A, Function description: B “from the list of remote controller unit functions will be displayed one

by one. Select a desired function.

3 Press the SET button.

The screen display will be switched as follows:

“

4 Press either or button.

A list of “Settings: C” will be displayed one by one. Select your desired setting.

5 Press the SET button.

The selected setting is displayed

for 2 seconds, then followed by

“SET COMPLETE” and the

function setting process is com-

pleted.

Then the screen display will be

swiched to “Function number: A, Function description: B,” s o

if you want to comtinue to set

another function, repeat the steps

as explained above.

To finish the function setting pro-

cess, please proceed to Step (c).

FUNCTION ” is selected.

or button.

SETTING” “Setting: C” (ex. “AUTO RUN ON”)

FUNCTION

I/U FUNCTION

“

FUNCTION”

* When “ AUTO RUN SET ” is selected.

AUTO RUN SET

AUTO RUN ON

AUTO RUN ON AUTO RUN OFF

Selector button

Previous screen buttonIndoor unit selector button

FUNCTION (Remote controller unit function)” or “I/U

Function number: A

Function description: B

Setting: C

SET COMPLETE

Start Button

When “I/U FUNCTION ” is selected.

1 The screen display will be switched as follows:

“

I/U SELECT” “

SET”

“I/U No.00” (blinking)

I/U No.00

2 Press either

Select the indoor unit number that you want to change settings. If only one indoor unit is connected, the indoor unit number will not charge, so please proceed to Step 3. If “ALL I/U

3 Press the SET button.

Indoor unit number indication will change from blinking to lit continuously, The screen display will be switched as follows: "DATA LOADING" (blinking for about 2 to 23 seconds) (Function number: A, Function description: B)

* When “ Hi CEILING SET” is selected.

Hi CEILING SET

4 Press either

“Function number: A, Function description: B” from the list of indoor unit functions will be displayed one by one. Select a desired function.

5 Press the SET button.

The screen display will be switched as follows: “

STANDARD

or button.

” is selected while indoor group control is in effect, you can set all units to the same settings.

“ FUNCTION” “Hi CEILING SET”

Function number: A

Function description: B

or button.

SETTING” “Setting: C” (ex. “STANDARD”)

Settings: C

6 Press either or button.

A list “Setting: C” will be displayed one by one. Select your desired setting.

7 Press the SET button.

The selected setting is displayed for 2 seconds, then followed by “SET COMPLETE” and the function setting process is completed. Then the screen display will be switched to “Function number: A, Function description: B” so if you want to continue to set another function, repeat the stepa as explained above. To finish the function setting process, please proceed to Step 8.

8 Press AIR CON No. button.

The screen display will go back to the indoor unit selection screen (ex. “ I/U No.00”). If you want to continue to set another indoor unit, please follow the steps explained above.

This ends a function setting process. Even if a function setting process is not completed, this ends the process. Please note that any setting that is not complated will become void.

● Pressing the RESET button during a function setting process will allow you to go back the previous step. Please note that any setting that is not completed will become void.

● Method of checking the current setting

While following the above mentioned step, the setting that appears when the SET button is pressed for each “Function

number: A, Function description: B” is the current setting “Stting: C”. (When "ALL I/U the indoor unit with the lowest number is displayed)

● Settings are stored in the controller and not lost even a power outage occurs.

" is selected, the setting of

(d) Changing the remote controller’s temperature setting range

1) The temperature setting range of the remote controller can be changed.

Through remote controller button operations, the upper limit and lower limit set temperature values can be changed

individually.

During heating operation, the changed upper limit value becomes valid and at times other than during heating operation,

(during cooling, dehumidification, auto and fan operation), the changed lower limit value becomes valid.

Range of Possible Changes

Upper Limit Value: 22~30ºC (valid during heating) Lower Limit Value: 18 ~ 26ºC (valid at times other than during

heating)

2) Operation

a) With the remote controller in the stopped state, press the SET and MOFDE buttons simultaneously for 3 seconds or

longer. The display will changed from “

b) Press the

c) Press the SET button to enter the temperature range setting mode.

d) Using the

e) If “Hi LIMIT SET” is selected,

1 The display changes from “ 2 Using the “ 3 Press the SET button to fix the setting. Display example: “Hi LIMIT 22ºC” (lighted up)

f) If “Lo LIMIT SET” is selected,

1 The display changes from “ 2 Using the 3 Press the SET button to fix the setting. Display example: “Lo LIMIT 26ºC” (lighted up)

g) Press the ON/OFF button to end the setting procedure.

(The procedure also ends if the ON/OFF button is pressed during the setting operation. However, settings which have

not been fixed become invalid, so exercise caution.)

• If the RESET button is pressed during a setting operation, the display returns to the previously displayed setting screen.

However, settings which have not been fixed become invalid, so exercise caution.

* If “NO DISP CHANGE” is selected in No. 12, “TEMP RANGE SET” of the remote controller’s functions, No. 1 of

the function setting modes, the remote controller’s display does not change even if the temperature range has been

changed.

button once. The display will change to TEMP RANGE

button, select “Hi LIMIT SET

” button, select the upper limit value. Display example: “Hi LIMIT 22ºC ” (flashing)

button, select the upper limit value. Display example: “Lo LIMIT 26ºC

SELECT ITEM” “

” or “Lo LIMIT SET

SET UP” “Hi LIMIT 22ºC ” (flashing).

SET UP” “Lo LIMIT 26ºC

SET” “FUNCTION SET

,” the press the SET button.

” (flashing).

” (flashing)

”

(Example) If the upper limit is set at 28˚C

Function No. A

Function Contents B Setting Contents C

TEMP RANGE SET

DISP CHANGE

NO DISP CHANGE

Control Contents

The remote controller’s display and sent data upper limit changes to 28°C.

The remote controller’s display upper limit remains at 30ºC and only the upper limit of the sent data is changed to 28°C.

(3) Cooling Test Operation Procedure

Carry out the following test operation procedure using the remote controller.

(a) Starting the Cooling Test Operation

1 Press the ON/OFF button to start operation.

2 Press the MODE button and select “COOL.”

3 Press the TEST button continuously for 3 seconds or longer.

The display changes from “

4 When “

TEST RUN.”

(b) Canceling the Cooling Test Operation

Pressing the ON/OFF button or the

The “

(4) Checking Operation Data

Operation data can be checked using the remote controller.

1 Press the CHECK button.

The display will change from “

“OPERATION DATA

2 When “OPERATION DATA

3 The display changes to “I/U No. 00

Using the

display.

(When there is only one indoor unit connected, the indoor unit No. does not

change.)

4 Fix the No. by pressing the SET button.

(The indoor unit No. changes from flashing to lighted up continuously.)

The message “DATA LOADING” is displayed flashing while data are being

read.

“OPERATION DATA

5 Display the other data in order from the currently displayed operation data No.

01 by using the

The items displayed are as shown at right.

Note (1) Depending on the model, items for which corresponding data do not exist are not displayed.

6 To change the indoor unit, press the AIR CON No. button and return to the

indoor unit selection display.

7 Press the ON/OFF button to end the data check.

TEST RUN

TEST RUN” display is cleared.

button, select the number of the indoor unit you want to

or button.

.”

” and data No. 01 are displayed.

SELECT ITEM” “

” is displayed, press the SET button to begin the cooling test operation. The display shows “

button ends the cooling test operation.

SELECT ITEM” “

” is displayed, pres the SET button.

” (flashing).

SET" “

SET"

TEST RUN

Number

.”

DATA ITEM

Operation mode

Temperature setting

Intake temperature

Indoor heat exchanger temperature 1

Indoor heat exchanger temperature 2

Indoor fan speed

Indoor unit operation hours

Outside air temperature

Outdoor heat exchanger temperature 1

Outdoor heat exchanger temperature 2

Operation Hz

Low pressure

Discharge pipe temperature

Temperature beneath the dome

CT current

Outdoor fan speed

Silent mode enabled/disabled

63H2 ON/OFF

63H1 ON/OFF

Defrost ON/OFF

Compressor operation hours

Expansion valve opening 1

Expansion valve opening 2

If the RESET button is pressed during the setting opera-

tion, the screen returns to the previous setting screen.

(5) Test run

(a) Test run method

1) A test run can be initiated from an outdoor unit by using SW9 (SW2) and SW5-4 for on-site setting.

2) Models FDCVA151~251

When SW9 (press button switch) is pressed for 1 second and then released, the compressor will start operation approxi-

mately 5 seconds later.

Models FDCA301~601

Press SW2 (push-button switch) for one second. The compressor will start when the button is released. The compressor

will stop when 30 minutes elaps.

3) The unit will start a cooling operation, when SW5-4 is OFF, or a heating operation, when SW5-4 is ON.

4) When a test run is completed, press SW9 (SW2) (push-button switch) again for one second and then release it.

Note (1) Items in ( ) show for the FDCA 301~601.

(b) Checking the state of the unit in operation

Check discharge pressure and suction pressure, using the check joint provided inside the outdoor unit and the gas charge

valve charge port. The check joint in the unit is provided on the pipe connecting the four-way valva and the heat exchanger,

and these points offer different pressure measurements depending on a cooling or heating operation as summarized in the

table below.

Cooling

Heating

1) Defrost conteol switching (SW5-1)

a) When this switch is turned on, the unit will run in the defrost mode more frequentiy.

b) Please set this switch to ON, when installed in a region where outdoor temperaure falls below zero during the season

the unit is run for a heating operation.

2) Snow guard fan control (SW5-2)

a) When this switch is turned on, the outdoor unit fan will run for 10 seconds in every 10 minutes, when outdoor tempera-

ture falls to 3˚C or lower and the compressor is not running.

b) When the unit is used in a very snowy country, please set this switch to ON.

Discharge pressure (high pressure)

Check joint in the unit

Suction pressure (low pressure)

Gas operation valve charge port

Suction pressure (low pressure)

Discharge pressure (high pressure)

3. Check display on wireless specification models (FDTN · FDEN · FDKN)

(1) Indication board

(a) FDEN Series

Romote controller signal receiving part

TIMER

CHECK

RUN

Backup switch

Operation display light (Green)

• Lights continously: Under air conditioner operaton

• Keeps flashing: Under heating preparation (At the time of heating operation)

• 3 time flash: Under reception of a remote controller signal

Timer/Check display light (Yellow)

Check monitor (Error code display E1~E60)

0.5 second lighting,0.5 second stays OFF

•

2 second lighting, 1 second stays OFF

: At the time of abnormalities : Filter sign

• Lights continously: Under timer operation

•

(b) FDKN Series

This figure shows the display on the 301 model. The shape of the display differs slightly on other models, but the functions are the same.

Error code [ ~ ]

Operation display light (Green)

The following two kinds are displayed.

• Lights contimously: Under air conditioner operation

• Keeps flashing: Under heating preparation

Flashes 3 times when a signal is received from the remote controller.

TIMER/CHECK

RUN

Timer/Check display (Yellow)

The following three kinds are displayed.

• Lights contimously:Under timer operation

•

Long lighting (2 second lighting, 1 second stays OFF) (Clean the air filter when this display is output.)

•

Short lighting (0.5 second lighting, 0.5 second stays OFF)

: Filter sign

At the time of the abnormalites air conditioner

OPERATION MODE indicator

Indicates selected operation mode

Fan speed

Indicates the selected fan speed

Auto swing

Indicates the selection of swing louver.

Timer ON time

Indicates the timer ON time. When the timer mode is “CONT” or “OFF”, the present time is indicated.

OPERATION MODE select button

This button, whenever pressed, changes the mode in the following order.

AUTO ➞ COOL ➞ DRY

➞

HEAT FAN

FAN SPEED button

Every time when the button is pressed, the mode is sequentially changed HI →LOW.

Air flow direction button

Used to start or stop the swing louver.

AUTO COOL DRY FAN HEAT

FILTER

FAN HI ME LO

OFF

MODE TEMP ON/OFF

AIR FLOW FILTER

FAN SPEED

TIMER

SET

TIMEACL

Signal sender

Signals are sent to the air conditioner from here.

Filter reset indicator

The FILTER RESET button is pressed.

mark is indicated when the

FILTER

Temperature indicator

Set temperature is indicated.

Timer OFF time

Indicated the timer OFF time. When the timer mode is “CONT” or “OFF”, there is no indication.

ON/OFF button

When the button is pressed, the air conditioner is started, and when the button is pressed once again, it is stopped. (When the air conditioner is stopped, the present time only is indicated. When the air conditioner is operating, details of setting are indicated.)

ROOM TEMP. button

Room temperature is set within the range of 18-30˚C by operating the ∆ ,

or button.

∇

Filter button

Used to reset (turn off) the filter sign. (Press for more than 1 second.) Press the button only after completing the filter cleaning.

Timer mode button

Every time when the button is pressed, the mode is sequentially changed CONT → ON → OFF → PROGRAM.

Reset switch

Used to reset the microcomputer when something is wrong on the remote controller display.

• Above figure shows all indications for the purpose of explanation, but practically only the pertinent parts are indicated.

TIME button

Used to set the present time and the timer operation time.

Set button

Used to switch from the hour to minute or vice versa when setting the present time or timer operation time.

Clock switch

Press this before setting the present time.

NOTICE

The installation of this equipment must comply with all NATIONAL, STATE and LOCAL CODES.

This Service Guide does not cover all installation circumstances and is meant for guidance only and therefore will not form part of any legally binding contract. An installation guide is provided with the air conditioning equipment.

3D Air Sales Ltd

Sales & Marketing Office

840 Brighton Road, Purley, Surrey, CR8 2BH Telephone: 020 8668 1112 Facsimile: 020 8668 1113

These Air Conditioners comply with: -

EMC Directive 89/336/EEC

LV Directive 73/23/EEC

3D Air Sales Ltd

Technical, Sales Admin., Spares, Warranty

Anglia House, Priors Way,

Coggeshall, Essex, CO6 1TL

Telephone: 01376 565 505

Facsimile: 01376 565 525

Mitsubishi FDT100V, FDC100VN user guide manual

Specifications and Main Features

Frequently Asked Questions

User Manual