Operation Control; Basic Function - Panasonic WH-MXF09D3E8 Service Manual

12.

Operation Control

12.1 Basic Function

Inverter control, which equipped with a microcomputer in determining the most suitable operating mode as time
passes, automatically adjusts output power for maximum comfort always. In order to achieve the suitable operating
mode, the microcomputer maintains the set temperature by measuring the temperature of the environment and
performing temperature shifting. The compressor at Mono bloc unit is operating following the frequency instructed by
the microcomputer at Mono bloc unit that judging the condition according to internal water setting temperature and
water outlet temperature.
12.1.1 Heating Operation
12.1.1.1 Thermostat control
•
Compressor is OFF when Water Outlet Temperature - Internal Water Setting Temperature > 2°C for continuously
3 minutes.
•
Compressor is ON after waiting for 3 minutes, if the Water Outlet Temperature - Water Inlet Temperature
(temperature at thermostat OFF is triggered) < -3°C.
12.1.2 Tank Mode Operation
Control contents:
•
3 ways valve direction
3 ways valve switch and fix to tank side.
o
•
Heat Pump Thermostat characteristic
Water set temperature = tank set temperature or [55°C] whichever lower.
o
Heat Pump Water Outlet set temperature is set to Maximum (53°C) at tank mode
o
i. Case 1
•
THERMO OFF TEMP:
1. THERMO OFF TEMP = Water set temperature + [+2°C].
2. Tank temperature > THERMO OFF TEMP for continuous 3 minutes, heat pump OFF and water pump
OFF.
•
THERMO ON TEMP:
1. THERMO ON TEMP = Water set temperature + [-3°C].
2. When detect tank temperature < THERMO ON TEMP, water pump ON for 3 minute then heat pump ON.
•
Pump ON when Tank temperature is less than Tank temperature when Heat Pump Thermo Off
– [-3°C].
ii. Case 2
•
Heat pump THERMO OFF TEMP:
1. Heat pump THERMO OFF TEMP = 53°C + [+4°C].
2. Water outlet temperature > Heat pump THERMO OFF TEMP for continuous 3 minutes, heat pump OFF
but water pump ON.
•
Heat pump THERMO ON TEMP:
1. Heat pump THERMO ON TEMP = Water inlet during thermo off time + [-3°C].
2. Heat pump ON back when water outlet temperature < Heat pump THERMO ON TEMP.
iii. Case 3
•
Heat pump THERMO OFF TEMP:
1. Water inlet temperature > 55°C for continuous 60 sec, heat pump OFF and water pump OFF.
•
Heat pump THERMO ON TEMP:
1. Heat pump THERMO ON TEMP = Water inlet during thermo off time + [-3°C].
2. Water pump ON back when tank temp. < tank temp. when heat pump thermo off + [-3°C].
3. Heat pump only ON back after water outlet temperature < Heat pump THERMO ON TEMP & water
pump ON for 3 minutes.
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