Toshiba RAS-M14EACV-E Troubleshooting, How to Check Whether the Air Purifier is Good or Not

11-7. Troubleshooting

11-7-1. How to Check Whether the Air Purifier is Good or Not

Primary check

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

Does the OPERATION indicator flash?

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 (Brown/GND) of CN1 of the high-voltage generator?

YES

Is there conduction of

micro-switch connector under OFF status of the micro-switch (Front panel opened)?

NO

Is there conduction of

micro-switch connector under ON status of the micro-switch (Front panel closed)?

NO

NO	Is DC12V applied	NO
	between 1 (+) and 2 (–)
	of CN33 of the main
	P.C. board (MCC5020)?
	YES
YES	Micro-switch is stuck

NO

Micro-switch malfunction

To item “Power supply is not turned on”

Replace the main P.C. board (MCC5020)

Replace micro-switch.

• Conduction check of micro-switch

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 electric dust collector, ionizer, or ionized wire unit with the human body.

Push the switch

ON → ON

Release the switch

→OFF

Tester

Operation check

Does the indoor fan rotate?

NO

To item “Only indoor fan does not operate”

YES

NO

Does the PURE indicator (Blue) or

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

the FILTER indicator (Orange) go on?

YES

Is DC-5V to DC-10V

•

How to check output of the air purifier

Does the PURE indicator

NO

applied between

NO

go off within 2 seconds after

4 (Brown/Negative voltage)

<Caution on High Voltage!!>

it was ON, and does the FILTER

and 2 (Brown/GND)

indicator (Orange) go on?

of CN33 of the main

Collector

P.C. board?

YES

output

YES

Are the electric dust

NO

Dry the electric

collector and ionizer dried?

dust collector

(Electrode check)

and ionizer.

YES

GND

Ionizer

Referring to the right figure, check the

Be sure not to

output

high-output voltage of the air filter unit.

come to contact

(NOTE)

to the gray part

High-voltage

Use an exclusive high voltage tester;

or not to touch

otherwise the tester may be broken.

the ionized

tester

cables.

YES

Refer to items, cleaning and check

Is output of the ionizer

NO

for the electric dust collector/ionizer/

approx. 4.0 kV to 4.8 kV?

Replace the high-voltage generator.

ionized wire units.

Is output of the collector

When the ionized wire is

approx. 3.0 kV to 3.8 kV?

disconnected or when dirt is

( not cleaned even cleaned,

)

YES

replace each unit.

Are the electric dust

collector/ionizer/ionized

YES

NO

wire units dirty?

No trouble

Is an abnormal sound

(cracking noise) heard

from the electrode?

– 92 –