Troubleshooting SiBE81-623A
30 Photocatalytic Air Purifiers
6.2 Troubleshooting
6.2.1 Equipment does not operate, or operation lamps does not light.
1 Models Covered 5 Troubleshooting
MC707VM-S
MC707VM-W
Diagnosis Remedy
Plug in AC cord.
Set breaker to
“ON”.
Close the panel
firmly.
Wait for power res-
toration.
When unspecified
voltage is applied,
replace power sup-
ply PCB.
(Varistor or fuse
may be damaged.)
Contact power
company.
Replace ON/OFF
switch cover.
(Replace display
PCB).
Go to “6.2.2.
Remote controller
sends signals errat-
ically”.
Replace panel.
*Protrusion on front
panel switch
Replace panel
(front panel switch
is not securely
mounted due to
deformity).
Replace the equip-
ment or the power
supply and control
PCB.
2 Method of Mal-
function Detection
3 Malfunction Deci-
sion conditions
4 Supposed Causes
• The unit is not turned on.
• Unspecified voltage is used.
• The safety device is activated due
to poor assembly of the panel.
• Front panel switch is defective.
• The PCB is defective.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Is there power failure?
Is 220-240V supplied?
Is rated voltage within ±10%?
Yes
No
No
Is AC cord plugged in?
Or is breaker "ON"?
No
Is the panel closed
certainly?
No
Yes
No
Do other appliances operate?
No
Yes
Yes
Yes
Yes
Remove panel.
Is protrusion on the rear
panel damaged?
Front panel switch operation check
Front panel operation
lamp light?
Yes
Yes
No
No
Press front panel switch with a thin
stick, then press ON/OFF switch
after 5 seconds.
Is operation possible
with remote controller?
Is operation possible with
ON/OFF switch?
(Cannot operate
with ON/OFF switch on unit)
Yes
(Cannot operate with remote controller)
Yes
No
No
Rear side
Protrusion
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