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13.2.2 Water Pump Only Operation
Water pump only circulation can be set from the control panel SERVICE S/W when the operation is in Standby
Mode.
Press the SERVICE S/W for continuous 5sec to enter Service Mode.
In Service Mode, select Sr:02 and press SET S/W to start water pump only operation.
Water pump will stop operation when H62 is triggered.
Press the OFF/ON button to stop the water pump only operation.
13.3
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.
1
Make sure the OFF/ON control panel LED is OFF (no operation).
2
Press the Pump Down button to start the pump down operation.
3
No low pressure protection error during pump down operation and 3-way valve will be shift to heating side.
4
Press OFF/ON button to stop the pump down operation.
13.4
Flow Switch
13.4.1 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 (0 V) when there is no water flow, and detection is Hi (5 V) when there is water flow.
13.5
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.
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