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10. ANOMALIES AND FUNCTIONING
10.1 Error codes displayed on Wire control display
Error codes are indicated by the number of flashes of the following LED lights on the unit display:
1) RUN operation indicator (LED2, red)
2) DEFROST defrost indicator (LED5, green),
The number of flashes of the operation indicator (RUN) indicates the decimal;
the number of flashes of the defrost indicator (DEFROST) indicates the unit.
For example, for error code 64: the RUN and DEFROST LEDs flash 4 times together then the
RUN LED continues to flash 2 more times (6 RUN flashes,
4 flashes DEFROST = error code 64).
Error
code
Description Causes How to Deal With
51
Drainage
protection
1. The water level of the drain pan exceed safe level;
2. The cable of the water level switch connect loose;
3. The water level switch is failure;
4. The control board is failure.
1.1 Check whether there are something to block the
drain hose or the height of the drain hose is too high;
1.2 Check the water pump and replace the water pump
if the water pump is failure;
2. Reconnect the cable of the water level switch refer
to the wiring diagram;
3. Replace the water level switch;
4. Replace the control board.
64
Communication
between Indoor &
Outdoor unit Fault
1. The connection cable between the indoor unit and the
outdoor unit connect wrong;
2. The communication cable connect loose;
3. The communication cable between the indoor unit
and the outdoor unit is failure or the cable between
the indoor control board to terminal is failure or the
cable between the outdoor control board to the
terminal is failure;
4. The indoor control board is failure;
5. The outdoor control board is failure.
1. Reconnect the connection cable refer to the indoor
and outdoor wiring diagram;
2. Reconnect the communication cable refer to the
indoor and outdoor wiring diagram;
3. Replace the communication cable refer to the indoor
and outdoor wiring diagram;
4. Replace the indoor control board;
5. Replace the outdoor control board.
71
Indoor unit zero
check fault
1. The motor wire is loosen;
2. The motor connect is open;
3. The motor is failure;
4. Control board is failure.
5. Indoor fan is baffled
1.Replace the motor wire and make sure the wire
connect is well;
2. Replace the motor wire;
3. Change the motor;
4. Change the indoor control board;
5. Check and elimination of fan motor rotation.
72
Indoor fan motor
fault
1. The cable of the indoor fan motor connect loose;
2. The cable of the indoor fan motor is failure;
3. The indoor fan motor is failure;
4. The indoor control board is failure
1. Reconnect the cable of the fan motor;
2. Replace the cable of the fan motor;
3. Replace the fan motor;
4. Replace the indoor control board;
5. Check the indoor fan and ensure the indoor fan can
run normally.
73
Indoor EEPROM Data
1 fault
1. Indoor EE components is failure;
2. The control circuit of the EE components is failure;
3. The EE components has been inserted with
opposite direction.
Replace the indoor control board;
74
Indoor EEPROM Data
2 fault
EE in MCU is failure, the unit can
run ,but the function user has set is ineffective.
Replace the indoor control board;
81
Indoor ambient
Temperature Sensor
Fault
1. The cable of the room temperature sensor
connect loose;
2. The room temperature sensor is failure;
3. The sampling circuit is abnormally
1. Reconnect the cable of the room temperature sensor;
2. Replace the room temperature sensor;
3. Replace the indoor control board.
83
Evaporator Middle
Temperature Sensor
Fault
1.The cable of the coil temperature sensor of the evapo-
rator is failure;
2. The coil temperature sensor of the evaporator is
failure;
3. The sampling circuit is abnormally
1.Reconnect the cable of the coil temperature sensor of
the evaporator;
2. Replace the coil temperature sensor of the evapora-
tor;
3. Replace the indoor control board.
Error codes referring to the indoor unit:
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