Panasonic WH-SDC12F6E5 Service Manual page 73

13.1.7 Cool + Tank Mode Operation
13.1.7.1 Cooling Priority SET
1. 3 ways valve control:
 3 ways valve switch to room side during External Room Thermo ON OR Tank Thermo OFF time, and switch to
tank side at External Room Thermo OFF AND Solar 3 ways valve OFF.
2. Heat pump operation control:-
During External Room Thermo ON time: (When room thermo ON heat pump must operate to room side).
 Heat pump operates follow normal operation at room side.
During External Room Thermo OFF time:
a) Switch 3 ways valve to tank side, IF
Under Solar Priority Set condition:
 Tank temperature > Tank THERMO OFF TEMP AND Solar Valve OFF.
Under Solar Priority Not Set condition:
 Tank temperature < Tank THERMO ON TEMP.
b) Switch back 3 ways valve to room side, Heat pump and water pump turn OFF, IF
Under Solar Priority Set condition:
 Tank temperature > Tank THERMO OFF TEMP for continuous 10 seconds OR Solar Valve ON.
Under Solar Priority Not Set condition:
 Tank temperature > Tank THERMO OFF TEMP for continuous 10 seconds.
*THERMO ON and THERMO OFF point refer to case below.
Operation condition when 3 ways valve switch to tank side:
 Tank water set temperature = tank set temperature or [55°C] whichever lower.
 Heat Pump Water Outlet set temperature is set to 53°C.
 Initial Tank THERMO ON TEMP = heat pump tank target temperature + [-2°C].
Tank Thermo ON/OFF characteristic
THERMO OFF TEMP:
o
1. THERMO OFF TEMP = Tank water set temperature + [0°C].
2. Tank temperature > THERMO OFF TEMP for continuous 10 seconds, switch 3 ways valve to room side.
3. Tank temperature > Tank set temperature + [2°C] for continuous 10 seconds, switch 3 ways valve to room
side.
Next THERMO ON TEMP:
o
1. THERMO ON TEMP = Tank water set temperature + [-2°C].
2. If tank temperature < THERMO ON TEMP AND External Room Thermo OFF, switch to tank side.
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