Abnormally High Compressor Current

What does E42 mean?

Abnormally high current has been detected in the compressor, indicating a potential electrical or mechanical fault with the compressor, or system overload. This can lead to compressor failure if not addressed.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Verify system refrigerant charge and pressure for potential overcharge or non-condensables, using a manifold gauge set.

2. 4

   Inspect power supply voltage to the outdoor unit and check for phase imbalance or low voltage conditions.