Philips WH-UD16CE5-A-1 Service Manual page 71

13.1.5 Cool + Tank Mode Operation
13.1.6 Tank Mode Operation
Control contents:

3 ways valve direction
- 3 ways valve switch and fix to tank side.

Heat pump Thermostat characteristic
- Water set temperature = Tank set temperature or [50°C] whichever lower.
- Heat pump Water Outlet set temperature is set to Maximum (53°C) at tank mode.
i. Case 1
- THERMO OFF TEMP:
1 THERMO OFF TEMP = Water set temperature + [1°C].
2 Tank temperature > THERMO OFF TEMP for continuous 10 seconds after heat pump OFF, water pump OFF.
- THERMO ON TEMP:
1 THERMO ON TEMP = Water set temperature + [-1°C].
When detect tank temperature < THERMO ON TEMP, water pump ON for 3 minutes then heat pump ON.
ii. Case 2
- Heatpump THERMO OFF TEMP:
1 Heat pump THERMO OFF TEMP = 53°C + [+4°C].
2 Water outlet temperature > Heat pump THERMO OFF TEMP for continuous 3 minutes, heat pump OFF.
- Heatpump THERMO ON TEMP:
1 Heat pump THERMO ON TEMP = Water inlet during thermo off time + [-3°C].
2 Heat pump ON back when water outlet temperature < Heat pump THERMO ON TEMP.
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