Panasonic WH-SDF09C3E8 Service Manual page 47

ii. Case 2
- Heatpump THERMO OFF TEMP:
1 Heatpump THERMO OFF TEMP = 55°C + [+2°C].
2 Water outlet temperature > Heatpump THERMO OFF TEMP for continuous 3 minutes, heatpump OFF but
water pump ON.
- Heatpump THERMO ON TEMP:
1 Heatpump THERMO ON TEMP = Water inlet during thermo off time + [-3°C].
2 Heatpump ON back when water outlet temperature < Heatpump THERMO ON TEMP.
iii. Case 3
- Heatpump THERMO OFF TEMP:
1 Water inlet temperature > 52°C for continuous 60 sec, heatpump OFF and water pump OFF.
- Heatpump THERMO ON TEMP:
1 Heatpump THERMO ON TEMP = Water inlet during thermo off time + [-3°C].
2 Water pump ON back when tank temp. < Tank temp. when heatpump thermo off + [-3°C].
3 Heatpump only ON back after water outlet temperature < Heatpump THERMO ON TEMP & water pump ON
for 3 minutes.

Booster heater control
- Booster heater turn On and Off follow normal operation.
- Booster heater turn ON condition:
1 During startup time (initialization), Booster heater turn ON after DELAY TIMER.
2 When tank temperature lower than HEATER ON TEMP
3 20 minutes from previous heater off.
- Booster heater turn OFF condition:
1 When tank temperature higher than tank set temperature for continous 15 sec.

Solar 3 way valve
- Solar pump operates follow solar operation specification.

Others
- Indoor backup heater cannot be ON during tank mode only.
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