Troubleshooting 31
7.11 PC 02(High temperature protection of IPM module or High pressure protection
diagnosis and solution)
Description: If the temperature of IPM module is higher than a certain value, the LED displays the failure code.
For some models with high pressure switch, outdoor pressure switch cut off the system because high pressure is higher
than 4.4 MPa, the LED displays the failure code.
Recommended parts to prepare:
• Connection wires
• Outdoor PCB
• IPM module board
• High pressure protector
• System blockages
Troubleshooting and repair:
Check the fastening screws on the
PCB and IPM radiator.
Are they
fixed tightly?
Replace the outdoor
control PCB.
Tighten the screws and apply
silicon grease.
NO
YES
Note: For certain models, outdoor PCB could not be removed separately. In this case, the outdoor electric
control box should be replaced as a whole.
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