PC 0F error code

What triggers it

The voltage signal that the IPM sends to the compressor drive chip is abnormal and the system turns off.

What to do

1. Test resistance between every two ports of U, V, W and P, N on the IPM; 0 or near-0 resistance means the IPM is defective.
2. Check the connecting line between the main board and PFC module; connect it tightly and verify.
3. Measure P-N voltage; replace the outdoor main board if voltage is normal.
4. Check the PFC module inductance.
5. Replace the inductance if it is bad; if inductance is good and two-port resistance is 0, replace the PFC module.

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

Technician-tier outdoor auxiliary board diagnostic; see service manual section 4.3

Source

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