Error code reference

Panasonic Air Conditioner Error Code H70

Light sensor abnormality

Panasonic codes Panasonic air conditioner codes

Light sensor abnormality — feedback value is 0 VDC continuously.

First step from the service manual

Check the connector connection of the sunlight sensor.

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

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Step-by-step tests with expected resistance, voltage, and continuity values
Wiring diagram references and connector pinouts from the OEM service manual
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H70 on my Panasonic Air Conditioner

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Light sensor abnormality — feedback value is 0

From Service Manual 763459, p.31:

1.Check the connector connection of the sunlight sensor.

2.Measure control board supply voltage at the test points. Expected: 12 VDC and 5 VDC; a drop below 4.75 VDC on the logic rail points to a failed onboard regulator.

3.Inspect all connectors on the main control for corrosion, thermal stress, or backed-out pins. Reseat each connector with the power disconnected.

Part WPW10804018

Electronic control board

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First step from the service manual

Get the full diagnostic procedure for H70.

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