Carrier 42QHP09E8S Service Manual page 77

5.11 P2(High temperature protection of IPM module diagnosis and solution)
Description: If the temperature of IPM module is higher than limited value, the LED displays this failure code.
Recommended parts to prepare:
• Faulty PCB
• Connection problems
Troubleshooting and repair:
Check the fastening screws on the
PCB and IPM radiator.
Are they
fixed tightly?
NO
Tighten the screws and apply
silicon grease.
Replace the outdoor
YES
control PCB.
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