Error code reference

Panasonic Air Conditioner Error Code H41

Abnormal wiring or piping connection

Abnormal wiring or piping connection — wrong wiring and connecting pipe, or expansion valve abnormality.

First step from the service manual

Check indoor/outdoor connection wire and connection pipe.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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H41 on my Panasonic Air Conditioner

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Abnormal wiring or piping connection — wrong

From Service Manual 763367, p.19:

1.Check indoor/outdoor connection wire and connection pipe.

2.Measure door lock assembly resistance across the PTC terminals. Expected: ~200 ohms cold, rising sharply once energized.

3.Inspect strike and latch alignment. A warped door or misaligned strike prevents the switch stack from closing in the correct sequence.

Part W10810403

Door lock assembly

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