Panasonic WH-MDF09C3E8, Service Manual

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2 Booster heater Turn Off condition:
o
Tank temperature > Tank set tempe [0 ° C] for continuous 15 secs
o
When BOOSTER HEATER DELAY TIMER start count after switch from heating heat-up interval to tank
heat-up interval
* DELAY TIMER can be set by remote control.
12.11 Base Pan Heater Control (Optional)
š
To enable the base pan heater function, pin 3 of SW2 of water system PCB has to be switched from OFF to ON
position.
š
Base pan heater ON condition:
o
When outdoor ambient temperature ≤ 3°C AND
o
Deice operation ON
Base pan heater will continue ON for 10 minutes after deice operation ends.
š
Base pan heater OFF condition:
o
When outdoor ambient temperature > 3°C OR
o
When operation is not heating OR
o
Base pan heater ON timer count completed
12.12 Three Way Valve Control
š
Purpose:
- 3 ways valve is used to change flow direction of hot water from heat pump between heating side and tank side
š
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
Base pan heater (85W)