Unit shows P2; may stop cooling or heating intermittently.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Supply voltage above maximum specification, Power surges, Incorrect supply (e.g., 240 V on 208 V unit), Faulty voltage detection on PCB

Safety first: Overvoltage can damage electronics.

Step 1 – Stop using the unit: If you suspect overvoltage, turn OFF the breaker to protect the AC.
Step 2 – Measure voltage: Have an electrician measure line voltage and correct any wiring or supply issues.
Step 3 – Surge protection: Consider installing a whole‑house surge protector or dedicated surge device for the AC.
Step 4 – PCB check: If voltage is normal but P2 persists, the outdoor PCB voltage sensing circuit may be faulty and require replacement.

Hard 4/5

Outdoor Main PCB

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