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10-7. Troubleshooting
10-7-1. How to Check Whether the Air Filter is Good or Not
Primary checkOperation check
Turn off the power breaker once,
and turn on again after 10 seconds.
Does the operation lamp flash?
Turn off the power breaker and
remove CN34 (Micro switch
connector). Short-circuit CN34
pin 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 filter 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 lamps go on for approx. 1 second
when a signal is received.
If time on the reactivation preventive timer is not shortened,
the high-pressure is not applied to electrode of the filter for approx. 1 hour.
• While the air filter operates, check that the air volume [AUTO] is not displayed.
(Because the power ON/OFF is controlled on the program)
3) Be sure not to touch the dust collector, ionizer, or ionized cable 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 plasma lamp (Blue)
or the filter lamp (Red) go on?
Is DC12V applied
between (Red/DC12V) and
(Brown/GND) of CN1 of the
high-pressure unit?
Is DC12V applied
between (+) and (–)
of CN33 of the main
P.C. board (MCC891)?
Deposited micro-switch
Inoperable micro-switch
To item “Power supply is not turned on”
Replace the main P.C. board (MCC891)
Replace micro-switch.
Push the switch
ON
Release the switch
OFF
Does the plasma lamp
go off within 2 seconds after
it was ON, and does the
filter lamp (Red) go on?
Are the dust collector
and ionizer dried?
(Electrode chack)
Dry the 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. 3.9kV to 4.7kV?
Is output of the collector
approx. 2.9kV to 3.7kV?
Are the dust
collector/ionizer/ionized
cable 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.
GND
Be sure not to come to
contact to the silver part
or not to touch the
ionized cables.
No trouble
Replace the main P.C. board (MCC891).
Replace the high-pressure unit.
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 dust collector/ionizer/ionized
cable units.
When the ionized cable is
disconnected or when dirt is
not cleaned even cleaned,
replace each unit.
• Conduction check of micro-switch
Tester
ON
• How to check output of the filter
<Caution on High Voltage!!>
Ionizer
Output
Collector
output
High-voltage tester
[ ]
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