Toshiba RAS-25PAVPG-ND Service Manual page 100

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
CN401 (Micro switch connector).
Short-circuit between and
1 2
of CN401 at PC side, and turn on the
power breaker after 10 seconds.
Short Timer and then check,
Is DC12V applied between (DC12V)
1
(GND) of CN1 of the
2
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)?
YES
1) Check operation while short-circuiting CN401 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.
Does the indoor fan rotate?
YES
Does the PURE indicator (white)
go on?
YES
Are the electric dust
collector ?
(Electrode check)
YES
Refer to items, cleaning and check
for the electric dust collector
NO
pin
Is DC12V applied
NO
between (+) and
1
of CN402 of the main
P.C. board ?
YES
YES
Micro-switch is stuck
NO
Micro-switch malfunction
NO
Is DC-5V to DC-10V
applied between
NO
(Negative voltage)
4
and
2
of CN402 of the main
P.C. board?
NO
Dry the electric
dust collector.
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.
Is output of the collector
approx. -2.7 kV to -3.4 kV?
Are the electric dust
collector?
YES
Is an abnormal sound
(cracking noise) heard
from the electrode?
- 100 -
FILE NO. SVM-17050
To item "Power supply is not turned on"
NO
(–)
2
• Conduction c heck of micr o-switc h
)
To item "Only indoor fan does not operate"
NO
Check High Voltage output Short to GND?
(GND)
• How to check output of the air purifier
YES
Be sure not to come
to contact to the
gray part
YES
NO
YES
NO
No trouble
Replace the main P.C. board.
Replace micro-switch.
Push the switch
ON
ˇ ON
Release the switch
ˇ OFF
Tester
<Caution on High Voltage!!>
Replace the high-voltage generator.