180
Discharge the Water
For Domestic Hot Water Tank
a) Turn OFF power supply.
b) Set the Domestic Hot Water Tank Discharge (Drain Tap) to “OPEN”.
c) Open Tap / Shower to allow air inlet.
d) Turn the Safety Relief Valve
knob counterclockwise slightly and hold it until all air is released from
this pipeline. Then recover the knob to original position after ensured the pipeline is emptied.
e) After discharge, set Domestic Hot Water Tank Discharge (Drain Tap) to “CLOSE”.
2 Check Water Pressure *(0.1 MPa = 1 bar)
Water pressure should not lower than 0.05 MPa (with inspects the Water Pressure from Remote Controller).
If necessary add water into Tank Unit (via Tube Connector ).
3 Check Pressure Relief Valve
⑮
o
Check for correct operation of Pressure Relief Valve
⑮
by turning on the lever to become horizontal.
o
If you do not hear a clacking sound (due to water drainage), contact your local authorized dealer.
o
Push down the lever after finish checking.
o
In case the water keep on draining out from the Tank Unit, switch off the system, and then contact your
local authorized dealer.
4 Air Purge Valve
Air purge valve must be installed at all high points in a closed water circuit system.
An automatic air purge valve is provided inside the indoor unit. To automatically purge the air from the
system, turn the plug on the air outlet anticlockwise by one complete turn from fully closed position.
Excessive air is automatically purged if the plug is kept in this position.
Air purge valve
⑭
Plug (turn
anticlockwise by
one complete turn)
5 Indoor Unit Control Board Area
Thorough visual inspection of the control board and look for defects, i.e. loose connection, melting of wire
insulator and etc.
6 Check RCCB/ELCB
Ensure the RCCB/ELCB set to “ON” condition before check RCCB/ELCB.
Turn on the power supply to the Tank Unit.
This testing could only be done when power is supplied to the Tank Unit.
WARNING
Be careful not to touch parts other than RCCB/ELCB test button when the power is supplied to Tank Unit. Else, electrical shock
may happen. Before obtaining access to terminals, all supply circuits must be disconnected.
o
Push the “TEST” button on the RCCB/ELCB. The lever would turn down and indicate “0”, if it functions
normal.
o
Contact authorized dealer if the RCCB/ELCB malfunction.
o
Turn off the power supply to the Tank Unit.
o
If RCCB/ELCB functions normal, set the lever to “ON” again after testing finish.
7 Reset Overload Protector
⑫
Overload Protector
⑫ a
serves the safety purpose to prevent the water over heating. When the Overload
Protector
⑫
a trip at high water temperature, take below steps to reset it.
a) Take out the cover.
b) Use a test pen to push the centre button gently in order to reset the Overload Protector
⑫
.
c) Fix the cover to the original fixing condition.
Use test pen to push
this button for reset
Overload protector
⑫
.
