Panasonic WH-SDC03H3E5 Service Manual page 90

f) Heat pump and water pump OFF when ROOM thermo OFF
- Heat mode: ROOM thermo OFF (Buffer Tank Temperature
- Cool mode: ROOM Thermo OFF (Both Zone thermo OFF by Room Th or Room Thermostat)
12.1.7 Auto Mode Operation

Control details:
To enable the unit to operate either heat or cool mode automatically, heat to cool set temperature and
o
cool to heat set temperature can be set by control panel.
Automatic operation is judged based on control panel setting temperature and outdoor ambient
o
temperature.
* Minimum setting of heat to cool set temperature is 1°C higher than cool to heat set temperature.

Judgement control:
If outdoor ambient temperature < Heat to Cool Set Temperature, unit will operate in Heat Mode or else
o
the unit will operate in Cool Mode.
If current operation is Cool mode, outdoor ambient temperature > Cool to Heat Temperature, unit will
o
maintain Cool mode operation or else the unit will operate Heat mode.
If current operation is Heat mode, outdoor ambient temperature > Heat to Cool Temperature, unit will
o
maintain Heat mode operation or else the unit will operate Cool mode.
Every 60 minutes the outdoor ambient temperature is judged.
o
When Auto + Tank mode is selected, operation mode switching is judged by both outdoor ambient
o
temperature and indoor air temperature.
Heat To Cool
Setting Temp.
Outdoor Ambient
Target Buffer Tank + [0°C]
>
COOL
MODE
HEAT
MODE
90
Cool To Heat
Setting Temp.