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11-7-2. How to Check Whether the Minus Ion Generator is Good or Not
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 electrode with the human body.
( )
Does the electrode
output approx. –6kV?
Replace the main P.C. board (MCC5020).
No trouble
YES
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.
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
in the air purifier?
Micro-switch is stuck
Micro-switch malfunction
To item “Power supply is not turned on”
Replace micro-switch.
Push the switch
→ ON
Release the switch
→ OFF
Does the PURE indicator
go off within 2 seconds after
it was ON, and does the FILTER
indicator (Orange) go on?
Replace the
high-voltage generator
To item “Only indoor fan does not operate”
To item “How to check whether
the air purifier is good or not”
YES
YES
NO
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
YES
YES
NO
• Conduction check of micro-switch
Tester
ON
• How to check output of minus ion
<Caution on High Voltage!!>
1
2
12
Replace the power P.C. board
(MCC5020) or the housing assembly.
high-voltage
unit
Electrode
High-voltage tester
Referring to the right figure, check the
high-voltage output of the air ionizer.
In this time, peel the thermal insulator, and attach
it to the original position after check operation.
NOTE :
Use an exclusive high voltage tester; otherwise
the tester may be broken.
GND