2
2
.
.
T
T
R
R
O
O
U
U
B
B
L
L
E
E
S
S
H
H
O
O
O
O
T
T
I
I
N
N
G
G
The following is the fault code table of indoor.
Sheet 2 Indoor fault code
Fault
code
Fault Description Possible Reason of Abnormality How to Deal With Remarks
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.
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.
1. Replace the EE components;
2. Replace the indoor control board;
3. Reassembly the EE components of
the indoor control board.
74
Indoor EEPROM
Data 2 error
EE in MCU is failure,the unit can
run ,but the function user has set is
ineffective.
Replace EE data in MCU.
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.
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