Panasonic WH-SDF07C3E5 Service Manual page 92
Indoor & outdoor unit air-to-water heatpump
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Also See for WH-SDF07C3E5:
- Operating instructions manual (76 pages) ,
- Service manual (158 pages) ,
- Design handbook (132 pages)
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17.5.7. Indoor/Outdoor Abnormal Communication (H90)
Malfunction Decision Conditions:
During standby and operation of heating, the data received from outdoor unit in indoor unit signal transmission is checked
whether it is normal.
Malfunction Caused:
1. Faulty outdoor unit PCB.
2. Faulty indoor unit PCB.
3. Indoor-outdoor signal transmission error due to wrong wiring.
4. Indoor-outdoor signal transmission error due to breaking of wire in the connection wires between the indoor and outdoor units.
5. Indoor-outdoor signal transmission error due to disturbed power supply waveform.
Abnormality Judgment:
Continue for 1 minute after operation.
Communication voltage measurement:
92
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