EDBE81-327
Troubleshooting
Photocatalytic Air Purifiers
25
6.2
Troubleshooting (case-by-case)
1
Models Covered
5
Troubleshooting
*Be sure to insert/pull out the connector after
turning off the power. It may cause malfunction.
MC704VM
Diagnosis
Remedy
*Release child lock.
Replace ON/OFF
switch cover.
(Replace display
PCB).
Go to “2. Remote
controller sends
signals erratically”.
Plug in AC cord.
Set breaker to
“ON”.
Wait for power res-
toration.
When unspecified
voltage is applied.
Replace power
supply PCB.
(Varister or fuse
may be damaged.)
Contact power
company.
Replace panel.
*Projection on door
switch
Replace panel
(door switch is not
securely mounted
due to deformity).
Go to “4. PCB is
defective”.
2
Method of Mal-
function Detection
3
Malfunction Deci-
sion conditions
4
Supposed Causes
•
The safety device is activated due
to poor assembly of the panel.
•
Door switch is defective.
•
The unit is not turned on.
•
Unspecified voltage is used.
•
The battery for the remote
controller is exhausted.
1. Equipment does not Operate, or Operation Lamps does not Light
Is operation possible
with remote controller?
Is operation possible with
ON/OFF switch?
Is there power failure?
Is 220-240V supplied?
Is rated voltage within ±10%?
Remove panel.
Is projection on the rear panel
damaged?
Door switch operation check
Does operation lamp light?
(Cannot operate
with ON/OFF switch on unit)
ON/OFF switch (Operation switch
/stop button)
Yes
(Cannot operate with remote controller)
Yes
Yes
No
No
Yes
Yes
No
No
Is AC cord plugged in?
Or is breaker "ON"?
No
Yes
No
Do other appliances operate?
No
Yes
Yes
No
No
Yes
Press door switch with a thin stick,
then press ON/OFF switch
after 5 seconds.
Rear side
Protrusion
