P4 — Faulty inverter circuit heatsink temperature sensor

What does P4 mean?

This indicates a fault with the temperature sensor monitoring the heatsink of the inverter circuit. This sensor is crucial for preventing overheating.

• Faulty inverter heatsink temperature sensor
• Loose or damaged wiring to the sensor

Click steps to track your progress.

1. 1

   Check the wiring connected to the inverter circuit heatsink temperature sensor for secure connections and damage.

2. 2

   Ensure the sensor is properly positioned.

3. 3

   If the wiring is fine, the sensor will likely need to be replaced by a professional.