Panasonic WH-MDC05F3E5 Service Manual page 57

Water Inlet Thermo Condition
Heat pump THERMO OFF TEMP:
o
1) Water inlet temperature > [55°C] for continuous 60 seconds, heat pump OFF.
THERMO ON TEMP:
o
1) THERMO ON TEMP = Water inlet temperature > [55°C].
c) Solar Operation Condition (Only under Solar Priority Set Condition)

When solar pump ON, tank heat-up interval end early and 3 ways valve switch to room side.
THERMO ON TEMP:
o
1) THERMO ON TEMP = Heat pump tank target temperature + [-2°C].
2) After cooling interval or external room thermo OFF, always detect tank temperature.
Switch to next tank heat-up interval when tank temperature < THERMO ON TEMP.
Tank interval will end and start cooling interval timer, IF
o
1) Tank interval timer finish AND External Room Thermo ON OR
Only when this condition occur at tank side before case 1 thermo OFF, switch to room side is
compulsory and continue until complete cooling interval and switch back to tank side.
2) Fulfill case 1 of thermo OFF condition.
3. Backup heater control:
a) Backup heater does not operate at Cool + Tank Mode.
4. Booster heater control:
a) During cooling interval
Booster heater ON/OFF according to booster heater operation control.
o
b) During tank heat-up interval
Once switch from cooling interval to tank heat-up interval, booster heater is turns OFF and BOOSTER
o
HEATER DELAY TIMER starts counting.
Booster heater turns ON after BOOSTER HEATER DELAY TIMER fulfill and tank temperature lower
o
than tank set temperature.
BOOSTER HEATER DELAY TIMER is clear when switch to cooling interval.
o
5. Solar 3 ways valve

Solar 3WV operates follow solar operation specification.
* Under solar priority is set condition, when solar 3WV is ON, booster heater turns OFF.
* Under solar priority is not set condition, solar 3WV only can ON during cooling interval.
6. 2 ways valve control:

2 ways valve is closed.
57