Panasonic WH-SDF09C3E8, Service Manual

Page: 57 / 125

57
12.14 Solar Operation (Optional)
12.14.1 Solar Operation
1 Control according to preset whether solar priority is set or not.
2 When tank connection is NOT set at SETTING mode, solar operation is disabled.
3 When Pump A (from solar pump station) is detected On through connection Y3 and Y4, then the Solar pump
3 Way Valve is requested ON (Refer to figure below).
12.14.2 Solar Operation Control
When solar priority is SET
1 Operation
condition:
a Solar pump operates if all of the following conditions are fulfilled:

Power On. (regardless operation ON or OFF)

There is operation request from solar pump station.

Tank hot water temp is below solar on upper limit temp [EEPROM 1 : 70]°C.
2 Stop condition:
a Solar pump stops operating when:

No power supply to unit OR

There is NO operation request from solar pump station OR

Tank hot water temp is above solar off upper limit temp [EEPROM 2 : 77]°C.
* heatpump OFF OR operate to room side when solar pump operate during solar priority set.
* booster heater OFF when solar pump operate during solar priority set.
When solar priority is NOT SET
1 Operation
condition:
a Solar pump operates if all of the following conditions are fulfilled:

Power On. (regardless operation ON or OFF).

There is operation request from solar pump station.

Tank hot water temp is below solar on upper limit temp [EEPROM 1 : 70]°C.

Heatpump thermo OFF in tank mode OR Heatpump operate to room side
(during operation ON and tank mode selected).
2 Stop condition:
a Solar pump stops operating when:

No power supply to unit OR

There is NO operation request from solar pump station OR

Tank hot water temp is above solar off upper limit temp [EEPROM 2 : 77]°C.

Heatpump thermo ON and operate to tank side. (during operation ON and tank mode selected).