Panasonic WH-MDC09C3E8, Service Manual

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12.12 Three Way Valve Control
Purpose:
- 3 ways valve is used to change flow direction of hot water from heatpump between heating side and tank side
Control contents:
1 3 ways valve switch Off:
o
During 3 ways valve switch Off time, the hot water will provide heat capacity to heating side.
2 3 ways valve switch On:
o
During 3 ways valve switch On time, the hot water will provide heat capacity to tank side.
3 Stop condition:
o
During stop mode, 3 ways valve will be in switch off position
12.13 Sterilization Mode
Purpose:
o
Boil tank temperature to customer set boiling temperature to operate sterilization.
Control start condition:
o
Tank connection set to YES by remote controller
o
Sterilization function selection is YES
o
Sterilization signal received from remote controller by timer.
Control stop condition:
o
After boiling timer completed. Boiling timer start counting once tank achieve boiling set temperature OR
o
After 4 hours of operation since sterilization function start OR
Control content:
o
Once the sterilization function enable, set the target tank temperature to Boiling Set Temperature.
o
Booster heater will allow to ON during solar priority SET condition.
ƒ Booster heater OFF Temp. = Boiling Set Temperature 0°C
ƒ Booster heater ON Temp. = Boiling Set Temperature - 7°C
o
The sterilization set temperature may not achieve if tank booster heater function is deactivated.
o
Boiling timer which set by remote controller will start count after tank achieve boiling set temperature.
o
Sterilization operation will end after complete boiling timer or Max 4 hrs from function start.
o
Target tank temperature will set back to normal tank set temperature.
* Tank heater control is not affected by solar pump when solar priority set.
12.14 Quiet Operation
Purpose:
- To provide quiet operation compare to normal operation by reduces Mono bloc unit noise.
Starting condition:
1 When quiet button is presses.
2 When quiet request ON time by weekly timer (Refer to remote control.)
When any of above mentioned condition is achieved, this control is activated.
New target FM speed = Present target FM speed - 80rpm
Minimum target FM speed = 200rpm
Cancellation condition:
1 Cancel by press quiet button
2 Stop by OFF/ON button
3 When quiet request OFF time by weekly timer
When any of above mentioned condition is achieved, this control is cancelled.
12.15 Anti Freeze Control
Anti freeze protection control can be select YES or NO from control panel. Default setting is YES.
In heatpump system, there are 2 types of anti freeze control:
1. Water pump circulation anti frost control
Water pump turns ON when ALL the below conditions are fulfilled:
o
Heatpump OFF (standby) OR water pump stop (Tank Mode) OR error occurs
o
Water flow switch is not abnormal
o
Outdoor ambient temp. < 3°C
o
Water inlet/outlet temp. < 6°C
o
After 5 minutes from previous water pump OFF