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196
TROUBLESHOOTING
18K, 24k and 36k outdoor Fault Codes
Fault
code
Fault D escription Possible R eason of Abnormality R E MAR KS How to D eal With
46
IPM and control board
communication fault
1.The cable between the control
board and the driver board
connect loose;
2.The cable between the control
board and the driver board is
failure;
3.The driver board is failure ；
4.The control board is failure.
47
1.
2.
Discharge
temperature too high
fault
1.Reconnect the cable between
the control board and the
driver board;
2.Replace the communication
cable between the control
board and the driver board;
3.Replace the driver board;
4.Replace the control board.
The refrigerant of the unit is not
enough;
The refrigerant of the unit is not
enough due to add the length of
the installation pipe
3.Throttling service is failure;
4.The outdoor ambient temperature
is too high
48
the outdoor DC fan
motor fault
(upper fan motor)
failure;
1.Check the welding point to
confirm whether the unit has
exist leakage
point, and then add some
refrigerant.
2.Add some refrigerant refer to
the installation user manual;
3.Replace the throttling service
(such as capillary, expansion
valve)
4. Normally protection.
1.The wiring of the up DC fan motor
connect loose;
2. The cord of the up DC fan motor is
3.The up DC fan motor is failure;
4. The drive circuit of the up DC fan
motor is failure;
5. The outdoor fan has been
blocked.
49
1.
2.
the outdoor DC fan
motor fault
(down fan motor)
1.Reconnect the wiring of the up
DC fan motor;
2.Replace the up DC fan motor;
3. Replace the up DC fan motor;
4.Replace the driv er board of the
fan motor;
5. Check the outdoor fan and
ensure the outdoor fan can run
normally.
The wiring of the down DC fan
motor connect loose;
The cord of the down DC fan
motor is failure;
3. The down DC fan motor is failure;
4. The drive circuit of the down DC
fan motor is failure;
5. The outdoor fan has been
blocked.
91
1.
2.
The unit turn off due to
the IPM
board over heating
fault
1. Reconnect the wiring of the
down DC fan motor;
2. Replace the down DC fan
motor;
3. Replace the down DC fan
motor;
4. Replace the driver board of
the fan motor;
5. Check the outdoor fan and
ensure the outdoor fan can run
normally.
1.
2.
The outdoor ambient is too high;
The speed of the out fan motor is
too low if the fan motor is AC fan
motor;
3.The outdoor unit has been
installed without standard;
4.The supply power is too low.
Normally protection;
Check the fan capacitor, and
replace the fan capacitor if it is
failure;
96
3. Reinstalled the outdoor unit
refer to the installation user
manual;
4.Normally protection.
the refrigerant of the
unit is not
enough fault
The refrigerant of the unit is not
enough
97
Discharge the refrigerant and
charge the refrigerant refer to the
rating label
4-way valve
commutation failure
fault
1.The wiring of the 4-way valve coil
connect loose;
2.The 4-way valve coil is failure;
3.The 4-way valve is failure;
4.The driver board of the 4-way
valve is failure
1. Reconnect the wiring of the
4-way valve;
2. Replace the 4-way valve coil;
3. Replace the 4-way valve;
4.Replace the driv er board of the
4-way valve.
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