Error Code: PC 08 – Outdoor Overcurrent Protection

Error Code: PC 08 – Outdoor Overcurrent Protection

What this means:
The system has detected an abnormal rise in electrical current within the outdoor unit. This is a protective shutdown to prevent damage to the outdoor PCB, fan, or other components.

Try this first (quick reset):

1. Turn off the power to the unit completely.

2. Wait 2 full minutes.

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

• If the error goes away — the issue may have been a temporary surge.

• If it returns — continue with the checks below.

Next steps (for technicians):

1. Check the power supply:

   • Is the incoming voltage stable and between 220V–400V?

   • Measure voltage between terminals L and N and between P and N (expect ~310–380V DC in standby).

   • If not, reconnect or correct the wiring.

2. Inspect the reactor:

   • Verify proper wiring to the reactor.

   • If the reactor or inductance is faulty → replace it.

3. Evaluate outdoor conditions:

   • If ambient temperature > 50°C → system may enter protection mode. Improve ventilation or wait for cooler conditions.

   • Clean the heat exchanger if it’s dirty.

   • Make sure outdoor fan is functioning. If not, follow fan speed troubleshooting steps.

4. Check refrigerant system:

   • If refrigerant is overcharged → safely recover excess.

   • If pressure is normal and all above checks pass but the issue persists → replace the outdoor PCB.

What you might need:

• Outdoor PCB

• Reactor

• Outdoor fan

• Connection wires

• Manifold gauge + recovery tools (if refrigerant pressure is high)

Helpful tip:
Overcurrent protection is often triggered by external power supply issues, blocked ventilation, or refrigerant imbalance. Always verify airflow and voltage before replacing internal components.

Click here to view the detailed guide.TS08-S