Error Code: PC 0F – PFC Module Protection

Error Code: PC 0F – PFC Module Protection

What this means:
The system has detected an abnormal voltage signal related to the PFC (Power Factor Correction) module. This may be caused by faulty wiring, a damaged PFC module, defective inductance, or failure in the IPM or outdoor main board. The system shuts down to prevent damage.

Try this first (quick reset):

1. Turn off the unit completely.

2. Wait 2 full minutes.

3. Turn the unit back on and check the display.

• If the error clears — the issue may have been temporary.

• If it persists — continue with the steps below.

Next steps (for technicians):

1. Test IPM module first:

   • Measure resistance between U, V, W and P, N terminals.

   • If any reading is 0 or near 0, the IPM module is defective and should be replaced.

2. Check PFC module connection:

   • Ensure the wire between the main PCB and PFC module is securely connected.

3. Measure voltage between P and N terminals:

   • Refer to voltage guidelines for normal readings (typically DC 310–380V in standby).

   • If abnormal → proceed to check inductance.

4. Test the PFC inductance:

   • Good inductance will show 0 ohm resistance between its two ports.

   • If not, replace the inductance.

5. Replace components as needed:

   • If inductance is fine but the issue continues → replace the PFC module.

   • If the PFC module is good and voltage is still abnormal → replace the outdoor main PCB.

What you might need:

• IPM module

• PFC module

• Outdoor PCB

• Inductance

• Connection wires

Helpful tip:
The PFC module is key for power stability. Before replacing the board, always test the IPM and inductance to isolate the root cause.

Click here to view the detailed guide.TS30