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15. Servicing Mode
15.1
How to Take Out Front Plate
Please follow the steps below for take out front plate. Before removing the front plate of indoor unit, always switch off
all power supply (i.e. indoor unit power supply, heater power supply and tank unit power supply).
1
Remove the 2 mounting screws which located at bottom of the front plate and 1 mounting screw at the front
of the plate.
2
Gently pull the lower section of the front plate towards you to remove the front plate from left and right hooks.
3
Hold the left edge and right edge of front plate to lift up front plate from hooks.
15.2
How to Take Out Side Cabinet
Please follow the steps below to remove the side
cabinet. Before removing the front plate of indoor unit
always switch off all power supply (i.e. indoor power
supply, heater power supply and tank unit power
supply).
1
Perform the steps in HOW TO TAKE OUT
FRONT PLATE.
2
Remove all the 13 mounting screws on the left,
right and top of the side cabinet.
3
Gently remove the side cabinet by holding both
of the handles.
15.3
Test Run
1
Fill up the boiler tank with water. For details refer to boiler tanks installation instruction and operation
instruction.
2
Set ON to the indoor unit and RCCB. Then, for control panel's operation please refers to air-to-water
heatpump's operation instruction.
3
For normal operation, pressure gauge reading should be in between 0.05 MPa and 0.2 MPa.
If necessary, adjust the water pump speed accordingly to obtain normal water pressure operating range. If
adjust water pump speed cannot solve the problem, contact your local authorized dealer.
15.4
Proper Pump Down Procedure
1
Make sure the OFF/ON control panel LED is OFF (no operation).
2
Press the "PUMPDW" switch on control panel to begin PUMP DOWN mode. Operate the system in PUMP
DOWN mode for 10 ~ 15 minutes.
3
After 10-15 minutes, (after 1 or 2 minutes in case very low ambient temperatures (< 10°C)), fully close 2 way
valve.
4
After 3 minutes, fully close 3 way valve.
5
Press the "OFF/ON" switch on control panel to stop PUMP DOWN mode.
6
Remove the refrigerant piping.
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