Inverter Power Transistor Overheat

What does E41 mean?

The power transistor for the inverter has overheated, indicating excessive heat generation, potentially due to a fault or overload condition. This poses a risk to the inverter module's longevity.

• Inverter power transistor (IGBT) has overheated.
• Insufficient cooling for the inverter module.
• Overcurrent condition causing excessive heat.
• Faulty heatsink or fan for the inverter.
• High ambient temperature impacting inverter operation.

Click steps to track your progress.

1. 1

   Inspect the inverter unit's heatsink for dust accumulation and ensure proper ventilation clearances.

2. 2

   Verify the outdoor fan operation is providing adequate cooling to the inverter components, checking fan speed and direction.

3. 3

   Measure the current draw of the compressor and compare to specification, checking for overload conditions.

4. 4

   Check for loose electrical connections within the inverter module's power circuit.