Panasonic WH-ADF0309J3E5CM Service Manual page 180

14.1.6 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
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tank achieve Tank Thermo OFF temperature.
 Tank Thermo ON/OFF Characteristic
Tank Thermo OFF
Case 1: Internal Tank Heater is select and Tank Heater ON
Tank temperature > Tank Set Temperature continuously for 15 seconds. OR
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Water outlet >75°C
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 Case 2: Tank Heater OFF OR External Heater is select
When heat pump OFF due to water thermos & Tank temperature > Tank water set temperature for
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continuously 20 seconds. OR
Tank temperature > Tank set temperature + 1°C for continuously 20 seconds.
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Tank Thermo ON
Case 1: Tank Heater ON (Internal Tank Heater)
Tank temperature < Tank set temperature + R/C (Tank re-heat temperature) AND Tank temperature < 50°C
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Case 2: Tank Heater OFF (Internal Tank Heater)
Tank temperature < Tank water set temperature + R/C (Tank re-heat temperature)
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Case 3: Heat pump operate in cool mode by other indoor unit.
Tank temperature < Tank set temperature or 43°C whichever lower.
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* 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:
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Outdoor ambient temperature
< -5°C
> -5°C
Characteristic of heat pump thermos ON/OFF under tank mode condition:
Water Outlet Thermo Condition

Heat pump thermos OFF temperature:
1. Heat pump thermo OFF temperature = Target Water outlet temperature + (3°C)
2. Water outlet temperature > heat pump thermo OFF temperature for continuously 3 minutes, heat pump OFF
but water pump continue ON.

Heat pump thermo ON temperature
1. Heat pump thermo ON temperature = water inlet during thermo OFF time + [-3°C]
2. When water outlet temperature < heat pump thermo ON temperature, heat pump ON.
Water inlet thermo protection condition

Heat pump thermo OFF temperature:
1. Water inlet temperature > [55°C/53°C] for continuously 30 seconds, heat pump OFF, water pump continue
ON.

Heat pump thermo ON temperature:
1. Heat pump thermos ON temp = water inlet temperature < [55°C/53°C].
Outdoor ambient temperature
Heat pump target water outlet temperature
< -5°C
> -5°C
53°C
56°C
Water inlet temperature
53°C
55°C
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