Panasonic WH-SXC09F3E8 Service Manual

Also see for WH-UX12FE8: Service manual Operating instructions Service manual Design handbook Operating instructions

Contents

Panasonic WH-SXC09F3E8 Service Manual Manual pdf 78 page image

7812.13 Anti Freeze Control Anti freeze protection control menu can be set YES or NO by control panel. In heatpump system, there are 3 types of anti freeze control:1. Expansion tank anti-freeze control Expansion tank anti freeze heater ON condition:o Outdoor ambient temp. < 3°C Expansion tank anti freeze heater OFF condition:o Outdoor ambient temp. > 4°C2. Water pump circulation anti freeze control Water pump turns ON when ALL below conditions are fulfilled:o Heatpump OFF (stand by) OR error occurs.o Water flowing flag is ON.o Water flow switch is not abnormal.o Outdoor ambient temp. < 3°C OR outdoor ambient temp. sensor is abnormal.o Water inlet/outlet temp. < 6°C.o After 5 minutes from previous water pump OFF. Water pump turn OFF when ANY of below conditions is fulfilled:o Outdoor ambient temperature ≥ 4°C.o During -5°C < outdoor ambient temp. < 4°C After water pump ON for 4 minutes, and water inlet temp. ≥ 8°C. Else, shift to back up heater anti freeze control.o During outdoor ambient temp. < -5°C After water pump ON for 4 minutes, and water inlet/outlet ≥ 20°C. Else, shift to back up heater anti freeze control. However, if flow switch is abnormal (H62), then water pump circulation anti freeze control will not activate.3. Back up heater anti freeze control: Back up heater turn ON when ALL below conditions is fulfilled:o Water inlet/outlet temp. < 6°C.o Water pump circulation anti freeze control activated and water pump ON for 4 minutes. Back up heater turns OFF when ANY of below conditions is fulfilled:o Water inlet/outlet temp. > 28°C.o Water pump circulation anti freeze control deactivated/water pump OFF. However, if back up heater is abnormal (H70) then back up heater anti freeze control will not activate.