Error Code: PC 0F – PFC Module Protection

Error Code: PC 0F – PFC Module Protection

What this means:
The system’s Power Factor Correction (PFC) circuit has detected an abnormal condition. Specifically, the outdoor PCB has identified either:

• A low PFC signal voltage, or

• A DC bus voltage below 340V for more than 6 seconds during startup quick checkTS27.

Try this first (quick reset):

1. Power off the unit.

2. Wait 2 minutes.

3. Turn the unit back on and check if the error clears.

• If the error clears — it may have been a temporary voltage dip.

• If it returns — continue with the diagnostic steps below.

Next steps (for technicians):

1. Check the connection between the PFC module and main board:

   • If loose → reconnect tightly and test.

   • If connection is secure → proceed to voltage measurement.

2. Measure the DC voltage between P and N terminals:

   • If voltage is abnormal → refer to your service manual's Appendix for expected ranges.

3. Check the inductance (choke coil) of the PFC module:

   • Measure resistance between the two inductance ports.

   • If not close to 0 ohms → replace the inductance coil.

   • If resistance is normal → replace the PFC module.

4. If problem persists after the above:

   • Replace the outdoor main PCB.

What you might need:

• PFC module

• Inductance coil

• Outdoor PCB

• Connection wires

Helpful tip:
PC 0F errors are usually tied to loose wiring, bad inductance, or aging PFC circuits. Always check physical connections before swapping components.

Click here to view the detailed guide.TS27