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Primary checkOperation check
Turn off the power breaker once,
and turn on again after 10 seconds.
Does the OPERATION indicator flash?
Turn off the power breaker and remove
CN34 (Micro switch connector).
Short-circuit between and pin
of CN34 at PC side, and turn on the
power breaker after 10 seconds.
1) Check operation while short-circuiting CN34 of the main P.C. board.
2) Perform air purifying operation by the remote controller.
• In this time, check that the remote controller is in status which is shortened by time on
the reactivation preventive timer and all display indicators go on for approx. 3 seconds
when a signal is received.
If time on the reactivation preventive timer is not shortened,
the high-voltage is not applied to electrode of the air purifier for approx. 1 hour.
• While the air purifier operates, check that the fan speed [AUTO] is not displayed.
(Because the power ON/OFF is controlled on the program)
3) Be sure not to touch the electric dust collector, ionizer, or ionized wire unit with the human body.
Is there conduction of
micro-switch connector under
OFF status of the micro-switch
(Front panel opened)?
Is there conduction of
micro-switch connector under
ON status of the micro-switch
(Front panel closed)?
Does the indoor fan rotate?
Does the PURE indicator (Blue) or
the FILTER indicator (Orange) go on?
Is DC12V applied
between (Red/DC12V) and
(Brown/GND) of CN1 of the
high-voltage generator?
Is DC12V applied
between (+) and (–)
of CN33 of the main
P.C. board (MCC5020)?
Micro-switch is stuck
Micro-switch malfunction
To item “Power supply is not turned on”
Replace the main P.C. board (MCC5020)
Replace micro-switch.
Does the PURE indicator
go off within 2 seconds after
it was ON, and does the FILTER
indicator (Orange) go on?
Are the electric dust
collector and ionizer dried?
(Electrode check)
Dry the electric
dust collector
and ionizer.
Is DC-5V to DC-10V
applied between
(Brown/Negative voltage)
and (Brown/GND)
of CN33 of the main
P.C. board?
Is output of the ionizer
approx. 4.0 kV to 4.8 kV?
Is output of the collector
approx. 3.0 kV to 3.8 kV?
Are the electric dust
collector/ionizer/ionized
wire units dirty?
Is an abnormal sound
(cracking noise) heard
from the electrode?
Referring to the right figure, check the
high-output voltage of the air filter unit.
(NOTE)
Use an exclusive high voltage tester;
otherwise the tester may be broken.
No trouble
Replace the main P.C. board (MCC5020).
Replace the high-voltage generator.
To item “Only indoor fan does not operate”
YES
YES
NO
YES
YES
YES
YES
YES
YES
NO NO
NO
NO
NO
YES
NO
YES
YES
YES
NO
NO
NO
YES
NO
NO
( )
( )
Refer to items, cleaning and check
for the electric dust collector/ionizer/
ionized wire units.
When the ionized wire is
disconnected or when dirt is
not cleaned even cleaned,
replace each unit.
• Conduction check of micro-switch
Tester
ON
GND
• How to check output of the air purifier
<Caution on High Voltage!!>
Ionizer
output
Collector
output
High-voltage tester
4
2
1 1 2
1 2
Push the switch
→ ON
Release the switch
→ OFF
Be sure not to come
to contact to the gray
part or not to touch
the ionized cables.
11-7. Troubleshooting
11-7-1. How to Check Whether the Air Purifier is Good or Not