Primary check

11-7-2. How to Check Whether the Minus Ion Generator is Good or Not

Turn off the power breaker once, and turn on again after 10 seconds.

Does the OPERATION indicator flash?	NO
	To item “Power supply is not turned on”

YES

Turn off the power breaker and remove CN34 (Micro switch connector). Short-circuit between 1 and 2 pin of CN34 at PC side, and turn on the power breaker after 10 seconds.

Is DC12V applied
between 1 (Red/DC12V) and		NO
2 (Brown/GND) of CN1 of the
high-voltage generator
in the air purifier?
	YES

Is there conduction of

micro-switch connector under YESMicro-switch is stuck OFF status of the micro-switch

(Front panel opened)?

Is there conduction of

micro-switch connector under NO Micro-switch malfunction ON status of the micro-switch

(Front panel closed)?

YES

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.

Replace the power P.C. board (MCC5020) or the housing assembly.

Replace micro-switch.

• Conduction check of micro-switch

Push the switch

ON → ON

Release the switch → OFF

Tester

Does the indoor fan rotate?

YES

To item “Only indoor fan does not operate”

Operation check

Does the PURE indicator (Blue) or	NO
the FILTER indicator (Orange) go on?

YES

Does the PURE indicator

go off within 2 seconds after YES it was ON, and does the FILTER

indicator (Orange) go on?

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.

Does the electrode	YES
output approx. –6kV?		No trouble

Replace the

high-voltage generator

Replace the main P.C. board (MCC5020).

To item “How to check whether the air purifier is good or not”

•How to check output of minus ion <Caution on High Voltage!!>

high-voltage unit

Electrode

GND

High-voltage tester

– 74 –

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