Panasonic WH-SDC09F3E8 / WH-SDC12F9E8 / WH-SDC14F9E8 / WH-SDC16F9E8 / WH-UD09FE8 / WH-UD12FE8 / WH-UD14FE8 / WH-UD16FE8 Service Manual ▷ View online
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17.5.8 Outdoor High Pressure Abnormality (H64)
Malfunction Decision Conditions:
During operation of cooling and heating, when the outdoor high pressure sensor output signal is 0 Vdc or 5 Vdc.
Malfunction Caused:
1 Faulty connector connection.
2 Faulty sensor.
3 Faulty outdoor unit PCB (main).
2 Faulty sensor.
3 Faulty outdoor unit PCB (main).
Abnormality Judgment:
Continue 4 times in 20 minutes.
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17.5.9 Deice Circulation Error (H65)
Malfunction Decision Conditions:
During startup and operation of deice (mode 2), the water flow (> 10l/min) detected by the water flow switch is
used to determine deice circulation error.
used to determine deice circulation error.
Malfunction Caused:
1 Water flow in air-to-water heatpump indoor unit circuitry.
2 Faulty indoor unit water flow switch.
3 Faulty indoor unit water pump.
4 Faulty indoor unit PCB.
2 Faulty indoor unit water flow switch.
3 Faulty indoor unit water pump.
4 Faulty indoor unit PCB.
Abnormality Judgment:
Continue for 10 seconds.
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17.5.10
Indoor Backup Heater OLP Abnormality (H70)
Malfunction Decision Conditions:
During operation of indoor backup heater, when no power supplies to indoor backup heater or OLP open circuit.
Malfunction Caused:
1 Faulty power supply connector connection.
2 Faulty connector connection.
3 Faulty indoor backup heater overload protector (OLP).
4 Faulty indoor unit PCB (main).
2 Faulty connector connection.
3 Faulty indoor backup heater overload protector (OLP).
4 Faulty indoor unit PCB (main).
Abnormality Judgment:
Continue for 60 seconds.
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17.5.11
Tank Temperature Sensor Abnormality (H72)
Malfunction Decision Conditions:
When tank connection is set to ON, the temperatures detected by the tank temperature sensor are used to
determine sensor error.
determine sensor error.
Malfunction Caused:
1 Faulty connector connection.
2 Faulty sensor.
3 Faulty indoor unit PCB (main).
2 Faulty sensor.
3 Faulty indoor unit PCB (main).
Abnormality Judgment:
Continue for 5 seconds.