6
TROUBLESHOOTING
Fault
code Fault description Possible reasonsfor abnormality How to deal with Remarks
13 Compressor overheat
protector device
1. The wiring of the overload
protector is connected loosely.
2. The overload protector fails .
3. The refrigerant is not enough;
4. The installation pipe is much
longer than the normal one, but
extra refrigerant is not added ;
5. The expansion valve fails;
6. The outdoor control board fails.
1. Reconnect the wiring of the
overload protector;
2. Replace the overload
protector;
3. Check the welding point of the
unit to confirm whether it is
leakage, and then recharge
the refrigerant;
4. Add the refrigerant;
5. Replace expansion valve;
6. Replace the outdoor control
board.
14
The high pressure
switch operation or
the unit is turned off
for high pressure
protection
1.
2.
The wiring of the high pressure
protector is connected loosely;
The high pressure protector
fails;
3.The outdoor control board is
abnormal;
4. Overload in cooling;
5. Overload in heating.
1.
2.
Reconnect the wiring of the
high pressure protector;
Replace the high pressure
protector;
3. Replace the outdoor control
board;
4. Please refer to the Note 3;
5. Please refer to the Note 4.
Applied to
models with
high
pressure
switch or
pressure
sensor
16 Overload protection
in cooling mode System overload Please refer to the Note 3.
17
Discharge
temperature sensor
fault
1.The wiring of the discharge
temperature sensor is connected
loosely;
2.The discharge temperature sensor
fails;
3.The sampling circuit is abnormal.
18 AC voltage is
abnormal
1.The AC voltage>275V or <160V.
2.The AC voltage of sampling circuit
on the driver board is abnormal.
1. Normal protection, please
check the supply power;
2. Replace the driver board.
19 Suction temperature
sensor fault
1.The wiring of the suction tempe-
rature sensor is connected loosely;
2.The suction temperature sensor
fails;
3.The sampling circuit is abnormal.
1.Reconnect the wiring of the
suction temperature sensor;
2.Replace the suction
temperature sensor;
3.Replace the outdoor control
board.
22 The defrosting sensor
fault
1.The wiring of the defrosting sensor
is connected loosely;
2.The defrosting sensor fails;
3.The sampling circuit is abnormal.
1. Reconnect the wiring of the
defrosting sensor;
2. Replace the defrosting sensor;
3. Replace the outdoor control
board.
1. Reconnect the wiring of the
discharge temperature sensor;
2. Replace the discharge
temperature sensor fails;
3. The sampling circuit is
abnormal.
23 Expansion valve A
tube (thin) sensor
fault
1. The wiring of the sensor for the
expansion valve A(thin tube)
connect loose;
2. The sensor for the expansion
A(thin tube) is failure;
3. The sampling circuit is
abnormally
1. Reconnect the wiring of the
sensor for the expansion valve
A (thin tube);
2. Replace the sensor for the
expansion valve A (thin tube);
3. Replace the outdoor control
board.
24 Expansion valve B
(thin)tube sensor fault
1. The wiring of the sensor for the
expansion valve B (thin tube)
connect loose;
2.The sensor for the expansion valve
B(thin tube) is failure;
3.The sampling circuit is abnormally
1. Reconnect the wiring of the
sensor for the expansion valve
B(thin tube);
2.Replace the sensor for the
expansion valve B(thin tube);
3. Replace the outdoor control
board.
