PC 08 - Error Code Diagnostic

If the error code PC 08 appear on your indoor unit, it indicates there's an unusual increase in current detected.

Diagnostic and Repair Process:

1. Check Power Voltage:

   • If it's abnormal, restart the unit once the power is normal.
   • If normal, check the outdoor terminal voltage.

2. For 220V Systems:

   • Check the voltage between L1 and L2.
   • If it's abnormal, reconnect L1 and L2 properly.
   • If normal, check the current.

3. For 110V Systems:

   • Check the voltage between L and N.
   • If abnormal, reconnect L and N properly.
   • If normal, check the current.

4. Assess Current:

   • If normal, replace the outdoor main PCB.
   • If abnormal, turn on the unit and measure the voltage between P and N.

5. Check Voltage on Standby:

   • For 220V systems, it should be around 220V DC.
   • If incorrect, check the reactor wiring and reconnect if needed.

6. Check Outdoor Ambient Temperature:

   • If it's over 50°C, stop the unit.
   • If not, check the reactor and inductance.

7. Assess Outdoor Unit Ventilation:

   • Ensure it’s functioning properly.

8. Check Outdoor Fan Operation:

   • If there are issues, refer to the "fan speed operating outside of the normal range" solution (F5 / EC 07).

9. Inspect Heat Exchanger:

   • Clean it if it’s dirty.

10. If Problems Persist:

    • Replace the outdoor main board.

11. Check System Pressure:

    • If it's too high, recycle the overcharged refrigerant.

12. Final Check:

    • Ensure the refrigerant system is running normally.

This process systematically checks various aspects to identify and resolve the issue.

To order a replacement part or to get further assistance in diagnosing your unit, please contact one of our support representatives by submitting a ticket using the link below.

Submit a Ticket

*Please note these procedures must be performed by a certified HVAC contractor.