Panasonic WH-SDF07C3E5 Service Manual page 104
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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17.5.19. Four Way Valve Abnormality (F25)
Malfunction Decision Conditions:
During operation of heating, when temperature below 0°C is detected by indoor pipe temperature sensor.
Malfunction Caused:
1. Faulty sensor.
2. Faulty connector connection.
3. Faulty outdoor unit PCB.
4. Faulty four way valve.
Abnormality Judgment:
Continue 4 times in 30 minutes.
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