Airwell Air Conditioner Error Codes

Codes

Indication

Malfunction

Possible reasons

E2

RUN indicator off for 3s and blinks 2 times

Inner spiral defrost protection

1. Poor air return to the indoor unit
2. Fan speed is incorrect
3. The evaporator is dirty.

E4

RUN indicator off for 3s and blinks 4 times

Compressor overheat protection

1. communication problem or damage EEV (Electronic Expansion Valve)
2. refrigerant leak
3. Poor heat transfer

E5

RUN indicator off for 3s and blinks 5 times

Overvoltage Protection

1. Supply voltage intermittent
2. Supply voltage too low and load too high

E6

RUN indicator off for 3s and blinks 6 times

Communication failure

1. Installation error
2. Board problem of indoor or outdoor unit

HER

HEAT indicator off for 3s and blinks 15 times

EEPROM error (memory chip)

Replace indoor unit board

F0

COOL indicator off for 3s and blinks 10 times

Lack of Freon or Block Protection

F1

COOL indicator off for 3s and blinks 1 time

Malfunction

INTERNAL AIR TEMPERATURE SENSOR

1. Sensor is broken or damaged.
2. There is a problem in the circuit of the temperature detection board

F2

COOL indicator off for 3s and blinks 2 times

Malfunction of the INTERNAL TEMPERATURE SPIRAL sensor (RT2)

F3

COOL indicator off for 3s and blinks 3 times

Outside sensor sensor malfunction

temperature

F4

COOL indicator off for 3s and blinks 4 times

Malfunction of the outdoor temperature sensor

F5

COOL indicator off for 3s and blinks 5 times

Compressor temperature sensor malfunction

H3

HEAT indicator off for 3s and blinks 3 times

Compressor overload protection

1. communication problem or damage to the EEV (Electronic Aspiration Valve)
2. refrigerant leak
3. OLP damage

H4

HEAT indicator off for 3s and blinks 4 times

System overload

The system is unstable, check that the evaporator and condenser are dirty and blocked.

H6

HEAT indicator off for 3s and blinks 6 times

no feedback from indoor unit motor

1. Indoor fan motor damaged
2. Indoor fan motor blocked
3. indoor unit board problem

H7

HEAT indicator off for 3s and blinks 7 times

Sync failure

1. Incorrect input voltage.
2. Compressor installation error.
3. Liquid and gas valve not open.
4. Damaged EEV (Electronic Expansion Valve) or improper operation
5. Poor heat transfer.
6. Recharge system.

HEAT indicator off for 3s and blinks 11 times

Air conditioner start failure

1. compressor installation error
2. Recharge system
3. the system is not balanced before starting the compressor
4. compressor error

P7

HEAT indicator off for 3s and blinks 18 times

Radiator temperature sensor malfunction

1. The sensor has been broken or damaged.
2. There is a problem in the circuit of the temperature detection board

P8

HEAT indicator off for 3s and blinks 19 times

Radiator temperature sensor overheat protection

1. Insufficient investment in the radiator module
2. Outdoor unit board problem

PH

COOL indicator off for 3s and blinks 11 times

High voltage

1. Voltage greater than 265 V
2. Outdoor circuit board circuit failure

PL

HEAT indicator off for 3s and blinks 21 times

Low voltage

1. Voltage below 150 V
2. Outdoor circuit board circuit failure

U1

HEAT indicator off for 3s and blinks 13 times

Compressor phase failure

Replace outdoor main board Replace the outdoor unit board

U5

COOL indicator off for 3s and blinks 13 times

AC problem detected

Replace the outdoor unit board

U7

COOL indicator off for 3s and blinks 20 times

Check Valve Malfunction

1. Voltage lower than 175V
2. The check valve clamp assembly is loose or broken
3. check valve damaged

UA

The HEAD and COOL indicators flash 12 times simultaneously

Configuration errors

The indoor unit does not match the outdoor unit

UF

The HEAD and COOL indicators blink 7 times simultaneously

Zero transition protection (indoor unit)

Replace indoor unit board

UH

The HEAD and COOL indicators blink 8 times simultaneously

There is no feedback from the motor of the external unit

Can this malfunction occur when an indoor unit motor is used?

UU

HEAD and COOL indicators blink 11 times simultaneously

DC over current

High voltage