Coil Frost/Overheating Protection Abnormality

What does P6 mean?

The indoor unit's protection mechanisms for evaporator coil frost or overheating are malfunctioning. This could lead to evaporator coil icing in cooling mode or excessive coil temperatures in heating mode, impacting efficiency and potentially damaging components.

1. 1

   Verify the indoor pipe sensor (P2) is operating correctly by measuring its resistance.

2. 2

   Check indoor fan motor operation and ensure adequate airflow across the evaporator coil.

3. 3

   Inspect the outdoor unit for issues affecting refrigerant pressures, such as low charge (for frosting) or high pressure (for overheating).