18
11
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Troubleshooting Procedures
(1) Symptoms and Remedies
Symptom
Check Item
Remedy
1. Blower fan
(motor) does not
rotate (power
does not turn
ON).
• How to determine whether the DC motor has a malfunction
The following table shows the values for a normal motor that was measured with a
multimeter.
The motor has a malfunction if any value is very different from the normal value.
Measurement method (pin number of P107 and P108 connectors)
terminal
Tester - terminal
Tester measurement mode Normal value
Malfunction diagnosis
Pin 1 (red)
Pin 4
Resistance
Infinity
Motor internal circuit breakdown
Pin 6 (white)
Pin 4
Resistance
10s of kΩ
Motor internal circuit breakdown
Pin 7 (yellow)
Pin 4
Resistance
10s of kΩ
Motor internal circuit breakdown
Pin 8 (blue)
Pin 4
Resistance
Infinity
Motor internal circuit breakdown
Pin 4 (black)
Pin 1
Diode
0.5 to 2 V
Motor internal circuit breakdown
Any pin
Outer casing of motor
Resistance
Infinity
Motor insulation breakdown
The above is the diagnostic method for when the motor is isolated.
Regardless of the rotation state, do not test the motor when the connectors are connected.
2. Dust is not
collected (air
volume is low).
3. Deodorizing is
not performed
(deodorizing
performance is
low).
4. The odor monitor
does not work.
5. The PM2.5
monitor or dust
monitor does not
work.
Is an operation mode lamp
lit when you press the
operation switch?
Check the continuity of the current fuse.
The current fuse has blown.
Replace the power supply control circuit board.
* Pull out the power plug before checking.
Check the connection cables and connectors
of the display operation circuit board and
power supply control circuit board.
Check the output voltage at the
connectors P107 and P108 of the power
supply control circuit board within 45
seconds after turning ON the power.
If 280 VDC is not output normally between
the pins 1 and 4, 15 to 19 VDC is not output
normally between the pins 6 and 4, and 1 to
6 VDC is not output normally between pins 7
and 4, replace the power supply control circuit
board. If the voltages are output normally,
replace the blower motor (pin 4 is GND).
Not
lit
Lit
Is the pre-filter clogged with
dust?
Remove the dust (clean the pre-filter and
HEPA filter).
Replace the HEPA filter with a new one.
Is the filter replacement lamp
lit?
Soak and wash the activated charcoal
filter.
Replace the activated charcoal filter with a
new one.
Not lit
Lit
Place perfume, hair tonic,
alcohol for disinfection, or
the like in front of the unit
and check the response.
Was there no response?
Replace the odor sensor.
* Response will be slow immediately after
the power switch is turned ON because the
odor sensor is performing the preparation
operation. Perform operation for about 5
minutes and then perform the check.
YES
Rub tissue paper for 20 seconds
and check the response. Was
there no response?
Replace the dust sensor.
YES
