Panasonic WH-MDC09C3E8 Service Manual

Also see for WH-MDC09C3E8: Design handbook Installation manual Installation manual Operating instructions Operating instructions

Contents

Panasonic WH-MDC09C3E8 Service Manual Manual pdf 67 page image

67 Water pump turns OFF when ANY of the below conditions is fulfilled:o Outdoor ambient temp. ≥ 4°Co During -5°C < outdoor ambient temp. < 4°C After water pump ON for 4 minutes, and water inlet/outlet temp. ≥ 8°C Else, shift to backup heater anti freeze controlo During outdoor ambient temp. < -5°C After water pump ON for 4 minutes, and water inlet/outlet temp. ≥ 20°C Else, shift to backup heater anti freeze control However, if flow switch is abnormal (H62), then water pump circulation anti freeze control will not activate.2. 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 OFFHowever, if backup heater is abnormal (H70), then backup heater anti freeze control will not activate.12.16 Solar Operation (Optional)12.16.1 Solar Operation1 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 pump3 Way Valve is requested ON (Refer to figure below).12.16.2 Solar Operation ControlWhen solar priority is SET1 Operation condition:o Solar pump operates if all of the following conditions are fulfilled:i) Power On. (regardless operation ON or OFF)ii) There is operation request from solar pump station.iii) Tank hot water temp is below solar on upper limit temp [EEPROM 1 : 70]°C.2 Stop condition:o Solar pump stops operating when:i) No power supply to unit ORii) There is NO operation request from solar pump station ORiii) 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.