Panasonic WH-SHF09D3E5, Service Manual

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- Switch to tank heat-up interval and start counting tank heat-up timer when tank temperature <
THERMO ON TEMP after room heat-up interval timer complete
* THERMO ON TEMP is defined form following Case1 to Case4.
o
During tank heat-up interval
- Heat pump tank target temperature = Tank set temperature or [60°C] whichever lower
- Heat pump Water Outlet set temperature is set to Maximum [65°C] during tank interval
- Initial Tank THERMO ON TEMP = heat pump tank target tempe
[-2°C]
Case 1:
- THERMO OFF TEMP:
1.
THERMO OFF TEMP = Heat pump tank target tempe [0 ° C] .
2.
Tank temperature > THERMO OFF TEMP for continuous 10 seconds after heat pump off due to water
thermo, switch 3 ways valve to room side. End Tank heat-up interval and start count heating heat-up
interval.
- THERMO ON TEMP:
1.
THERMO ON TEMP = Heat pump tank target tempe [-2 ° C] .
2.
After Heating heat-up interval, always detect tank temperature. Switch to next tank heat-up interval
when tank temperature < THERMO ON TEMP
Case 2:
- Heat pump 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.
- THERMO ON TEMP:
1.
THERMO ON TEMP = Water inlet temperature, when heat pump thermo off + [-3 ° C] .
Case 3:
- Heat pump THERMO OFF TEMP:
1.
Water inlet temperature > 60°C for continuous 60 secs, heat pump OFF.
- THERMO ON TEMP:
1.
THERMO ON TEMP = Water inlet temperature < 65°C.
Case 4 (Only during solar priority is set condition):
š
When solar pump ON, tank heat-up interval end early and 3 ways valve switch to room side.
- THERMO ON TEMP:
1.
THERMO ON TEMP = Heat pump tank target tempe [-2 ° C] .
2.
After Heating heat-up interval, always detect tank temperature. Switch to next tank heat-up interval
when tank temperature < THERMO ON TEMP and solar 3 way valve OFF.
- Tank interval will end and start heating interval timer, IF
1.
Tank interval timer finish AND External Room Thermo ON OR
2.
Fulfill above Case 1 of thermo off condition.
3 Backup heater control:
o
During heating heat up interval.
- Follow normal backup heater control operation.
o
During tank heat-up interval.
- Backup heater OFF during this interval.
4 Booster heater control:
o
During heating heat-up interval.
- Booster heater ON/OFF according to booster heater operation control.
o
During tank heat-up interval.
- Once switch from heating heat-up interval to tank heat-up interval, turn off the booster heater and start
counting the BOOSTER HEATER DELAY TIMER.
- Booster heater turn ON after BOOSTER HEATER DELAY TIMER fulfill and tank temperature lower
than tank set temperature.
- BOOSTER HEATER DELAY TIMER is clear when switch to heating heat-up interval.