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Mitsubishi FD error code support

 

Error Codes for Mitsubishi Heavy Industries Air Conditioning  FDTA, FDTA 151~401 FDTA 501, 601 FDE Model FDKA 151~251  FDUR models

Remote controller error code

Indoor unit LED

Outdoor unit LED

Cause

Green

Red

Green        Red                                  

 

Keeps flashing

Stays OFF

Keeps flashing

Stays OFF

Normal

Stays OFF

Stays OFF

Stays OFF

Stays OFF

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

No-indication

Keeps flashing

Stays OFF

Keeps flashing

Stays OFF

Indoor unit microcomputer failure

Keeps flashing

*3 time flash

Keeps flashing

Stays OFF

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.

LCD flashes continuously or is off.

Keeps flashing

Stays OFF

Keeps flashing

2 time flash

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

E1

Keeps flashing

Stays OFF

Keeps flashing

Stays OFF

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

Stay OFF or Lights continuously

Stay OFF

Keeps flashing

Stays OFF

Indoor unit PCB fault

Keeps flashing

Stay OFF

Keeps flashing

Stays OFF

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.)

E5

Keeps flashing

2 time flash

Keeps flashing

2 time flash

Indoor / outdoor transmission error.

Keeps flashing

2 time flash

Stays OFF

Stays OFF

Outdoor unit control PCB is faulty when the power is turned on, or the inverter parts are faulty (FDCVA 151~251 type).

Keeps flashing

2 time flash

Keeps flashing

Stays OFF

Outdoor unit microcomputer failure

E6

Keeps flashing

1 time flash

Keeps flashing

Stays OFF

Indoor unit heat exchanger thermistor failure

E7

Keeps flashing

1 time flash

Keeps flashing

Stays OFF

Indoor unit return air thermistor failure

E8

Keeps flashing

1 time flash

Keeps flashing

Stays OFF

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

E9

Keeps flashing

1 time flash

Keeps flashing

Stays OFF

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

E10

Keeps flashing

Stays OFF

Keeps flashing

Stays OFF

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.

E16

Keeps flashing

Stays OFF

Keeps flashing

Stays OFF

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

E28

Keeps flashing

Stays OFF

Keeps flashing

Stays OFF

Remote controller thermistor failure

 

Remote controller error code

Indoor unit LED

Outdoor unit LED

Cause

Green

Red

Green          Red                                             

 

E32

Keeps flashing

Stays OFF

Keeps flashing

1 time flash

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

E33

Keeps flashing

Stays OFF

Keeps flashing

1 time flash

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

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

E34

Keeps flashing

Stays OFF

Keeps flashing

1 time flash

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

E35

Keeps flashing

Stays OFF

Keeps flashing

1 time flash

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

E36

Keeps flashing

Stays OFF

Keeps flashing

1 time flash

Discharge temperature abnormality.

E37

Keeps flashing

Stays OFF

Keeps flashing

1 time flash

Outdoor unit heat exchanger thermistor failure

E38

Keeps flashing

Stays OFF

Keeps flashing

1 time flash

Outdoor air temperature thermistor failure

E39

Keeps flashing

Stays OFF

Keeps flashing

1 time flash

Discharge pipe thermistor failure

E40

Keeps flashing

Stays OFF

Keeps flashing

1 time flash

63H1 operation (FDCA 301~601 type)

E42

Keeps flashing

Stays OFF

1 time flash

Current (Abnormalities in a compressor over current)

E47

Keeps flashing

Stays OFF

1 time flash

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

E48

Keeps flashing

Stays OFF

1 time flash

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

E52

Keeps flashing

Stays OFF

Keeps flashing

Lights continuously

52C abnormal. (FDCA 301~601 type)

E56

Keeps flashing

Stays OFF

1 time flash

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

E57

Keeps flashing

Stays OFF

Keeps flashing

1 time flash

Insufficient refrigerant.

E59

Keeps flashing

Stays OFF

1 time flash

Compressor start-up error (FDCVA 151~251 type)

2 time flash

3 time flash

E60

Keeps flashing

Stays OFF

1 time flash

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

(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 (1) Check of inspection display [In-door/outdoor unit PCB, remote controller or Indication board] Check of inspection display [In-door/outdoor unit PCB, remote controller or Indication board] Power supply check (indoor/outdoor unit) Replacement or repair of defective parts Test run/adjustment Check of unit controller

(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 discovered, 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.)

PJA505A122ZD PJA505A122ZC PJA505A128ZF Parts number FDTA 151~401 FDTA 501, 601 FDE Model FDKA 151~251 FDKA 301 FDUR Model PHA505A018ZF PHA505A018ZG PJA505A131ZC Parts number

(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 inspection 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 interrupted) after

the irregularity is automatically recovered to give irregularity information to the service personnel. 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.)

 

Characteristics of HEAT mode operation

Mechanism and capacity of HEAT mode operation

Mechanism

The unit draws in heat from the cold outside air, transfers it indoors and heats the room. The heating capacity of the heat pump mechanism decreases

when the outside air temperature gets colder.

The hot air circulation system takes a while before warming up the room temperature.

If the outside temperature becomes extremely low, it would be better to use an additional source of heating.

Defrosting

If the outside temperature becomes low and humidity is high, the heat exchanger in the outdoor unit may frost over, which prevents efficient heating.

If this happens, the automatic defroster is activated and during defrosting the heating operation stops for 5 to 10 minutes.

Both indoor and outdoor fans stop and the RUN light (green) blinks slowly (1.5 sec. ON, 0.5 sec. OFF) during defrosting.

The outdoor unit may give off some steam during defrosting. This is to help the defrosting process and is not a defect.

The HEAT operation resumes as soon as defrosting has been completed.

 

Air conditioner operating conditions

Use within the following operational range. Operating outside of this range may result in the protection devices being activated, preventing the unit from working.

Cooling operation

Outside temperature Approximately 21 to 43 C

Heating operation

Below approximately -15 to 21 C

Below approximately 80%

The long-term use of the unit with a humidity level Inside humidity exceeding 80% may result in condensation forming on the surface of the indoor unit, leading to water drips.

 

Dependent upon service conditions and operating environment, the inside of the air conditioner may become dirty after a number of seasons'

service (3 to 5 years). This will reduce performance. In addition to normal cleaning, we would recommend inspection and maintenance. (The air conditioner has a longer life without any trouble.)

Contact your dealer, or any distributor, for inspection and maintenance. (There will be a charge for this service).

We would recommend inspection and maintenance to be carried out during the off-season.

If the supply cord of this appliance is damaged, it must only be replaced by a repair shop appointed by the manufacturer, because special purpose tools are required.

Inspecting and replacing the natural enzyme filter and the photo catalytic washable deodorizing filter

1. Open the air inlet grill and remove the air filters.

2. Remove the filter holders, with the natural enzyme filter and the photo catalytic washable

deodorizing filter installed in the holders, from the air conditioner.

3. Remove the natural enzyme filter from the filter holder and inspect the filter. Use a vacuum

cleaner to remove any dust or dirt from the natural enzyme filter. Replace the natural enzyme

filter if it cannot be cleaned or if it has been used for about 1 year.

(The natural enzyme filter should be replaced after about 1 year of use. However, the actual

replacement period may vary depending on the conditions in which the filter is used.)

Remove the photo catalytic washable deodorizing filter from the filter holder and inspect the

filter. Periodically, remove any dust or dirt from the photo catalytic washable deodorizing

filter. If the photo catalytic washable deodorizing filter is particularly dirty, it may be washed

with water. However, the filter is fragile so be sure to wash it installed in the filter holder to

avoid damaging it. After washing the filter, place it in sunlight to dry. Placing the filter in

sunlight revitalizes the deodorizing effect.

(Do not dispose of the filter holders. They are reused.)

4. Install the natural enzyme filter and the photo catalytic washable deodorizing filter in the filter

holders, and then install the filter holders in the air conditioner.

5. Install the air filters and close the air inlet grill.

For replacement natural enzyme filters and photo catalytic washable deodorizing filters, contact your dealer.

 

Tel: +44(0)1234 764128

E-mail: info@orionair.co.uk


 

 

 


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