Auto Mode Operation - Panasonic WH-ADC0309H3E Service Manual

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.
12.1.8 Auto Cooling Mode Operation Limit

Auto Mode Cooling Only operation will start once the outdoor ambient temperature reaches 19°C and
compressor will continue to run until the outdoor ambient temperature drops to 16°C.

Due to this limitation,
If Heat to Cool temperature is set lower than 19°C, the compressor will not operates until the outdoor
ambient temperature reaches 19°C or higher.
12.1.9 Tank Mode Operation
 3 ways valve direction
3 ways valve switch to tank side during Tank Thermo ON condition. Switch 3 ways valve to room side when
o
tank achieve Tank Thermo OFF temperature.
 Tank Thermo ON/OFF Characteristic
Tank Thermo OFF
o
Case 1: Internal Tank Heater is select and Tank Heater ON
Tank temperature > Tank Set Temperature continuously for 15 seconds.
o
Water outlet >75°C
o
Heat To Cool
Setting Temp.
Outdoor Ambient
19°C
Outdoor Ambient
Temperature
COOL
MODE
Cool To Heat
Setting Temp.
HEAT
MODE
Compressor
ON
16°C
Compressor
OFF
99