Trane 4TYK8536B1000AA - Page 55

13. Troubleshooting
54 SS-SVM001A-EM
Fault
code
Fault description Possible reasons for abnormality How to deal with Remarks
46
IPM and
control board
communication
fault
1. The cable between the control board
and the driver board is connected
loosely;
2. The cable between the control board
and the driver board fails;
3. The driver board fails;
4. The control board fails.
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.
47
Too high discharge
temperature fault
1. The refrigerant of the unit is not
enough;
2. The refrigerant of the unit is not
enough due to that the installation
pipe is longer;
3. Throttling service fails;
4. The outdoor ambient temperature is
too high.
1. Check the welding point to confirm
whether the unit has leakage point,
and then add some refrigerant;
2. Add some refrigerant referring to the
installation user manual;
3. Replace the throttling service (such
as capillary, expansion valve);
4. Normal protection.
48
The outdoor DC
fan motor fault
(upper fan motor)
1. The connecting wiring of the up DC
fan motor is loose;
2. The cord of the upper DC fan motor
fails;
3. The upper DC fan motor fails;
4. The drive circuit of the upper DC fan
motor fails;
5. The outdoor fan has been blocked.
1. Reconnect the wiring of the up DC
fan motor;
2. Replace the upper DC fan motor;
3. Replace the upper 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.
49
The outdoor DC
fan motor fault
(down fan motor)
1. The connecting wiring of the down
DC fan motor is loose;
2. The cord of the down DC fan motor
fails;
3. The down DC fan motor fails;
4. The drive circuit of the down DC fan
motor fails;
5. The outdoor fan has been blocked.
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.
91
The unit turn off
due to the IPM
board over heating
fault
1. The outdoor ambient temp. is too
high;
2. The speed of the out fan motor is too
low if the fan motor is AC fan motor;
3. The outdoor unit is not installed in
accordance with the standard;
4.The supply power is too low.
1. Normal protection;
2. Check the fan capacitor, and replace
the fan capacitor if it is a failure;
3. Reinstalled the outdoor unit
referring to the installation user
manual;
4. Normal protection.
96
Lacking of
refrigerant
The refrigerant of the unit is not
enough.
Discharge the refrigerant and charge
the refrigerant referring to the rating
label.