Error Code: PC 0A – High Temperature Protection of Condenser

Error Code: PC 0A – High Temperature Protection of Condenser

What this means:
This protection triggers when the condenser temperature rises above 65°C. To prevent damage, the unit will shut down and only restart when the temperature falls below 52°CTS30.

Try this first (quick reset):

1. Turn off the system.

2. Wait 2 full minutes.

3. Restart and observe the display.

• If the error clears — monitor condenser conditions.

• If the error remains — follow the diagnostic steps below.

Next steps (for technicians):

1. Measure condenser temperature:

   • If above 65°C → proceed with sensor and system checks.

2. Check the sensor resistance:

   • Refer to the Appendix (in the service manual) for correct values.

   • If resistance is abnormal → replace the condenser temperature sensor.

3. Check outdoor ambient temperature:

   • If over 50°C → stop operation and allow cooling.

4. Inspect unit ventilation:

   • If blocked → improve airflow around the outdoor unit.

5. Check the heat exchanger:

   • If dirty → clean the heat exchanger thoroughly.

6. Check refrigerant system:

   • If undercharged → add refrigerant.

   • If normal but error persists → replace outdoor main PCB.

7. Check the outdoor fan operation:

   • If fan is not working → refer to EC 07 (Fan Speed Out of Control) diagnosis.

8. Check sensor connection:

   • If wiring between temperature sensor and PCB is loose or faulty → correct or replace the wiring.

What you might need:

• Condenser temperature sensor

• Outdoor fan

• Outdoor main PCB

• Refrigerant

• Connection wires

Helpful tip:
Blocked airflow and high ambient temperatures are common causes of PC 0A. Start with ventilation and cleaning checks before replacing components.

Click here to view the detailed guide.TS30