Troubleshooting - Toshiba RAS-B10GKVP-E Service Manual

11-8. Troubleshooting

11-8-1. How to Check Whether the Air Purifier is Good or Not
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
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)?
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.
Does the indoor fan rotate?
YES
Does the PURE indicator (Blue) or
the FILTER indicator (Orange) go on?
YES
Does the PURE indicator
go off within 2 seconds after
it was ON, and does the FILTER
indicator (Orange) go on?
YES
Are the electric dust
collector and ionizer dried?
(Electrode check)
YES
Refer to items, cleaning and check
for the electric dust collector/ionizer/
ionized wire units.
( When the ionized wire is
disconnected or when dirt is
not cleaned even cleaned,
replace each unit.
NO
1 and 2 pin
NO
between
YES
NO
Micro-switch malfunction
NO
NO
NO
4
Dry the electric
NO
dust collector
and ionizer.
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.
approx. 4.0 kV to 4.8 kV?
Is output of the collector
approx. 3.0 kV to 3.8 kV?
)
YES
Is DC12V applied
1 (+) and 2 (–)
of CN33 of the main
P.C. board (MCC5020)?
YES
Micro-switch is stuck
Is DC-5V to DC-10V
applied between
(Brown/Negative voltage)
and 2 (Brown/GND)
of CN33 of the main
P.C. board?
YES
YES
Is output of the ionizer
YES
Are the electric dust
collector/ionizer/ionized
wire units dirty?
Is an abnormal sound
(cracking noise) heard
from the electrode?
– 89 –
To item "Power supply is not turned on"
NO
Replace the main P.C. board (MCC5020)
Replace micro-switch.
• Conduction check of micro-switch
ON
)
Tester
To item "Only indoor fan does not operate"
Replace the main P.C. board (MCC5020).
• How to check output of the air purifier
NO
<Caution on High Voltage!!>
Be sure not to come
to contact to the gray
part or not to touch
the ionized cables.
High-voltage tester
NO
Replace the high-voltage generator.
NO
No trouble
Push the switch
→ ON
Release the switch
→ OFF
Collector
output
GND
Ionizer
output