Error Code: PC 06 – Discharge Temperature Protection of Compressor

Error Code: PC 06 – Discharge Temperature Protection of Compressor

What this means:
This error is triggered when the compressor discharge temperature (T5) rises above 115°C for 10 seconds. The compressor will shut down and will not restart until the temperature drops below 90°C.

Try this first (quick reset):

1. Turn off power to the unit completely.

2. Wait 2 full minutes.

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

• If the error clears — the system will resume operation below 90°C.

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

Next steps (for technicians):

1. Check the compressor discharge temperature (T5):

   • If above 115°C, overheating is confirmed.

2. Inspect the refrigerant system:

   • If refrigerant is leaking → repair the leak and recharge the system.

   • If the high pressure valve is faulty → replace the valve assembly.

3. Check wiring between T5 sensor and PCB:

   • Use the wiring diagram to ensure connections are correct.

   • If miswired or loose → correct the wiring.

4. Measure resistance of the T5 sensor:

   • If resistance is out of range → replace the T5 discharge temperature sensor.

   • If resistance is normal and wiring is correct but error persists → replace the outdoor main PCB.

What you might need:

• Discharge temperature sensor (T5)

• Outdoor PCB

• High pressure valve assembly

• Connection wires

• Refrigerant and leak repair tools

Helpful tip:
This protection helps prevent compressor burnout due to refrigerant issues or airflow problems. Always verify discharge temperature and sensor accuracy before replacing major components.

Click here to view the detailed guide.TS29