Carrier 38LUVH045N-1 - PART7. Trouble Shooting; IGBT, Voltage, and Temperature Protection Diagnosis

PART7, 5
2.5 IGBT over-strong current protection diagnosis and solution
2.6 Over voltage or too low voltage protection diagnosis and solution
2.7 High temperature protection of compressor top diagnosis and solution
Yes
Yes
No,
Charge refrigerant
Is the abnormality the same
after gas charging?
Replace the outdoor unit PCB.
No
Yes
Is protector normal?
No
No
Is the connection good?
Is refrigerant circulation
volume normal?
Reconnect it
Does the compressor operate?
Replace it
Is the power supply good?
Replace the outdoor unit e-box.
Make sure the power supply is normal.
Yes
No
Yes
YES
Fastening the IPM to the radiator
No
Check whether the connections between
outdoor PCB and IPM are good?
Replace the IPM
The unit does not work normally
Replace the compressor
Check whether the IPM is fixed to radiator tightly
There is block (Such as capillary or
welded points of the pipes.)