MRCOOL / DIY 5th Generation
PC 02 error code
The IPM module temperature is higher than the manual's protection value.
- Severity
- technician
- Verified
- Jul 18, 2026
What triggers it
The IPM module temperature is higher than the manual's protection value.
What to do
- Check whether the fastening screws on the PCB and IPM radiator are fixed tightly.
- If the screws are not fixed tightly, tighten them and apply silicon grease.
- If the screws are fixed tightly and the fault remains, replace the outdoor control PCB.
Which systems show it
- MRCOOL DIY 5th Generation single-zone 9k, 12k, 18k, 24k, and 36k D25 indoor/outdoor models listed in manual section 1.1.
Related codes
Technician scope
High-pressure protector, IPM, fan
Source
- Document
- data/sources/mrcool-diy5-service.pdf
- Section
- 4.7 TS11-S-INV: IPM module high temperature protection diagnosis and solution
- Page
- 72