Panasonic WH-SDC09H3E8 Service Manual page 105

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
o
when 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
a) Tank temperature > Tank Set Temperature continuously for 15 seconds.
b) Water outlet >75°C
Case 2: Tank Heater OFF OR External Heater is select
a) When heat pump OFF due to water thermos & Tank temperature > Tank water set temperature for
continuously 20 seconds. OR
b) Tank temperature > Tank set temperature + 1°C for continuously 20 seconds.
Tank Thermo ON
o
Case 1: Internal Tank Heater is select and Tank Heater ON
a) Tank temperature < Tank set temperature + R/C (Tank re-heat temperature)
Case 2: Tank Heater select OFF OR External Heater is select
a) Tank temperature < Tank water set temperature + R/C (Tank re-heat temperature)
* When tank thermo ON, water pump will ON for 3 minutes then only heat pump turn ON.
Tank water set temperature = tank set temperature or 51°C whichever lower
*

2 ways valve close

Heat pump Thermostat Characteristic
Heat pump Water Outlet set temperature is set to below table:
o
19°C
Outdoor Ambient
Temperature
Outdoor ambient temperature
< 5°C
> 5°C
Compressor
ON
Compressor
OFF
Heat pump water outlet temperature
55°C
57°C
105
16°C
.