Panasonic WH-UD07CE5-A - Page 103

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17.5.9. Indoor-Control Panel Communication Abnormality (H76)
Malfunction Decision Conditions:
During standby and operation of cooling and heating, indoor-control panel error occur.
Malfunction Caused:
1. Faulty connector connection.
2. Faulty control panel.
3. Faulty indoor unit PCB (main).