Panasonic WH-MXF09D3E5, Service Manual

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12.1.4. Heat + Tank Mode Operation
Setting 1:- When heating priority is set by control panel:
1. 3 ways valve control:
• 3 ways valve switch and fix to room side.
2. Heat pump operation control:-
• Heat pump operate follow normal operation.
3. Backup Heater control:-
• Backup heater operate follow normal operation.
4. Booster Heater control:
• Booster heater On/Off follow normal operation.
5. Solar 3 way valve:
• Solar 3 way valve operates follow solar operation specification.
* Under solar priority is set condition, when solar 3 way valve is ON, booster heater turn OFF.
Setting 2:- When heating priority is not set by control panel:
When Solar Priority is set / not set by control panel:
1. 3 ways valve control:
• 3 ways valve switch to room side during heating heat-up interval, and switch to tank side during tank heat-up interval. Both
mode will switch alternatively.
2. Heat pump operation control:
• During heating heat-up interval
- Follow normal heating operation.
Under solar priority set condition:
-
Always detect the tank temperature after heating heat-up interval. Switch only to tank heat-up interval and start
counting tank heat-up timer when tank temperature < THERMO ON TEMP AND solar 3WV OFF
Under solar priority not set condition:
-
Always detect the tank temperature after heating heat-up interval. Switch only to tank heat-up interval and start
counting tank heat-up timer when tank temperature < THERMO ON TEMP
* THERMO ON TEMP is defined form following Case1 to Case4.