Maintenance Guide - Panasonic WH-SDC09H3E8 Service Manual

15. Maintenance Guide

In order to ensure safety and optimal performance of the unit, seasonal inspections on the unit, functional check of
RCCB/ELCB, field wiring and piping have to be carried out at regular intervals. This maintenance should be carried
out by authorized dealer. Contact dealer for scheduled inspection.
1 Water pressure
Water pressure should not lower than 0.05 MPa (with inspects the Water Pressure Gauge). If necessary add
tap water into Tank Unit. Refer to Tank unit installation instruction for details on how to add water.
2 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 keeps drained out from the unit, switch off the system, and then contact your local
o
authorized dealer.
3 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.
4 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.
5 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.
o
If RCCB/ELCB functions normal, set the lever to "ON" again after testing finish.
o
Pressure relief
valve
Lever
Turn up
Pressure relief valve
Plug (turn
anticlockwise by
one complete turn)
Air purge valve
WARNING
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