Troubleshooting - Daikin MC707VM-S Manual

Troubleshooting

6.2 Troubleshooting
6.2.1 Equipment does not operate, or operation lamps does not light.
Caution
1
Models Covered
MC707VM-S
MC707VM-W
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.
30
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
5
Troubleshooting
Is AC cord plugged in?
Or is breaker "ON"?
Is the panel closed
certainly?
Do other appliances operate?
Is rated voltage within ±10%?
Is operation possible
with remote controller?
Is operation possible with
ON/OFF switch?
Remove panel.
Is protrusion on the rear
panel damaged?
Front panel switch operation check
Press front panel switch with a thin
stick, then press ON/OFF switch
after 5 seconds.
Front panel operation
lamp light?
Diagnosis
No
Yes
No
Yes
No
Is there power failure?
Yes
Is 220-240V supplied?
No
Yes
Yes
(Cannot operate
with ON/OFF switch on unit)
No
Yes
(Cannot operate with remote controller)
No
Yes
No
Yes
No
SiBE81-623A
Remedy
Plug in AC cord.
Set breaker to
"ON".
Close the panel
firmly.
Yes
Wait for power res-
toration.
No
When unspecified
voltage is applied,
No
replace power sup-
ply PCB.
Yes
(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
Rear side
Protrusion
Replace panel
(front panel switch
is not securely
mounted due to
deformity).
Replace the equip-
ment or the power
supply and control
PCB.
Photocatalytic Air Purifiers