Panasonic WH-UD05JE5 Service Manual page 180

3 Check Pressure Relief Valve
Check for correct operation of Pressure Relief Valve 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
o
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 purge valve outlet anticlockwise by one complete turn from fully closed
position.
Excessive air is automatically purged if the plug is kept in this position.
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 RCCB/ELCB
Ensure the RCCB/ELCB set to "ON" condition before check RCCB/ELCB.
Turn on the power supply to the indoor unit.
This testing could only be done when power is supplied to the indoor unit.
Be careful not to touch parts other than RCCB/ELCB test button when the power is supplied to Indoor Unit. Else, electrical shock
may happen.
Push the "TEST" button on the RCCB/ELCB. The lever would turn down and indicate "0", if it functions
o
normal.
Contact authorized dealer if the RCCB/ELCB malfunction.
o
Turn off the power supply to the indoor unit.
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If RCCB/ELCB functions normal, set the lever to "ON" again after testing finish.
o
7 Reset Overload Protector
Overload Protector serves the safety purpose to prevent the water over heating. When the Overload
Protector 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.
c. Fix the cover to the original fixing condition.
Plug (turn
anticlockwise by
one complete turn)
Air purge valve
WARNING
Use test pen to push
this button for reset
Overload protector.
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