High Temperature Protection Of Compressor Top Diagnosis And Solution - Carrier 38MHRB series Service Manual

DIAGNOSIS AND SOLUTION (CONT)
High temperature protection of compressor top diagnosis and solution (P2)
Error Code
Malfunction decision conditions
Supposed causes
Troubleshooting
Check if the Fastening screws
on the PCB and IPM radiator
are fixed tightly.
No
Tighten the screws and apply
silicon grease.
For other models,
P2
If the sampling voltage is not 5V, the LED displays the failure.
S
Power supply problems
S
System leakage or block
S
PCB faulty
Yes
Replace the outdoor control PCB.
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