SiBE81-623A Troubleshooting
Photocatalytic Air Purifiers 33
6.2.4 DC fan locks.
1 Models Covered 5 Troubleshooting
MC707VM-S
MC707VM-W
Diagnosis Remedy
NOTE: If connector
is unplugged with
unit turned on, fan
motor may be dam-
aged. (Turn off
power before plug-
ging in connector.)
Correct.
Replace the fan
motor.
• When the indica-
tors blink after
restarting, replace
the power supply
and control PCB.
2 Method of Mal-
function Detection
Abnormality of the fan motor is
detected by revolutions with the Hall
IC while the fan motor is running.
3 Malfunction Deci-
sion conditions
When the fan motor is not revved
up.
4 Supposed Causes
• Fan motor is defective.
• Power supply and control PCB is
defective.
• Connector is off.
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Four airflow rate indicators
blink simultaneously.
Retry to operate with
ON/OFF switch.
Airflow rate indicators
blink then go off.
Is fan motor connector off?
Yes
No
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