Panasonic WH-SHF09D3E5, Service Manual

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12.3 Pump Down Operation
Purpose
Ensure the pump down operation when relocating or disposing of the unit. The pump down operation will extract all
refrigerant from the piping into the outdoor unit.
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Pump down operation control:
1 Press the SERVICE S/W for continuous 5 secs to enter Service mode.
2 In service mode, select Sr:01 and press SET S/W to start Pump Down operation.
3 There will be no Low Pressure error & Freeze prevention judgement during pumpdown operation.
4 3 ways valve will shift to room side.
5 Press the ON/OFF button to stop the unit.
12.4 Flow Switch
12.4.1 Flow Switch Control
1 The water flow switch serve as an overload protector that shuts down the unit when the water level is
detected to be low.
2 Detection is Lo (0V) when there is no water flow, and detection is Hi (5V) when there is water flow.
12.5 Force Heater Mode Operation
The backup heater also serves as backup in case of malfunctioning of the outdoor unit.
1 Make sure the OFF/ON control panel LED is OFF (no operation).
2 Press the Force button to start the force heater mode operation.
3 During force heater mode, all other operations are not allowed.
4 Press OFF/ON button to stop the force heater mode operation.