Panasonic WH-ADF0309J3E5CM Service Manual page 251

25.2.5 Abnormal Solar Sensor (- / - / H28)
Malfunction Caused:
1 Faulty connector connection.
2 Faulty solar sensor.
3 Faulty indoor sub PCB.
Abnormality Judgment:
Continue for 5 seconds.
Abnormal solar sensor
H28 happens check connection at CN207 normal?
Measure resistance of sensor match characteristic?
Change Indoor sub PCB
YES
YES
For safety reason and to prevent
component breakdown, always switch
Caution
off the power before remove and
connect the component.
NO
● Correct sensor connect ion
NO
● Change solar sensor
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