Panasonic WH-SDC03E3E5 Service Manual

Also see for WH-UD03EE5: Service manual Design handbook Operating instructions Service manual

Contents

Panasonic WH-SDC03E3E5 Service Manual Manual pdf 58 page image

582 Backup heater anti freeze control: Backup heater turns ON when ALL the below conditions are fulfilled:o Water inlet/outlet temp. < 6°Co Water pump circulation anti freeze control activated, and water pump ON for 4 minutes Backup heater turns OFF when ANY of the below conditions is fulfilled:o Water inlet/outlet temp. > 28°Co Water pump circulation anti freeze control deactivated/water pump OFF However, if backup heater is abnormal (H70), then backup heater anti freeze control will not activate.12.16 Solar Operation (Optional)12.16.1 Solar Operation:1 External solar heat source signal can be connect to unit for proper control of heat source switching duringtank boiling time.2 Control according to preset whether solar priority is set or not.3 When tank connection is NOT set at SETTING mode, solar operation is disabled.4 When Pump A (from solar pump station) is detected On through connection Y3 and Y4, then the Solar pump3 Way Valve is requested ON (Refer to figure below).12.16.2 Solar Operation ControlWhen solar priority is SET1 Operation condition:a 3 way valve 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 72°C.2 Stop condition:a 3 way valve 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 80°C.* heat pump 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 SET1 Operation condition:a 3 way valve 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 72°C. Heat pump thermo OFF in tank mode OR Heat pump operate to room side(during operation ON and tank mode selected).