Troubleshooting For Air Purifier And Minus Ion - Toshiba RAS-24NKHD-E4 Service Manual

9-8. Troubleshooting for Air Purifier and Minus Ion

9-8-1. 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 lamp blink?
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 unit?
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 control.
• In this time, check that the remote control is in status which is shortened by time on
the reactivation preventive timer and all display lamps 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 dust collector, ionizer, or ionized wire unit with the human body.
Does the indoor fan rotate?
YES
Does the plasma lamp (Blue) or
the filter lamp (Orange) go on?
YES
Does the plasma lamp
go off within 2 seconds after
it was ON, and does the
filter lamp (Orange) go on?
YES
Are the dust collector
and ionizer dried?
(Electrode check)
YES
Refer to items, cleaning and check
for the dust collector/ionizer/ionized
wire units.
When the ionized wire is
(
disconnected or when dirt is
not cleaned even cleaned,
replace each unit.
NO
Is DC12V applied
NO between 1 (+) and 2 (−)
of CN33 of the main
P.C. board (WP-003)?
YES
YES
Micro-switch is stuck
NO
Micro-switch malfunction
NO
Is DC-5V to DC-10V
applied between
4 (Brown/Negative voltage)
NO
and 2 (Brown/GND)
of CN33 of the main
P.C. board?
Dry the dust
NO
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.
Is output of the ionizer
approx. 3.9kV to 4.7kV?
Is output of the collector
approx. 2.9kV to 3.7kV?
)
Are the dust
collector/ionizer/ionized
YES
wire units dirty?
Is an abnormal sound
(cracking noise) heard
from the electrode?
– 72 –
To item Power supply is not turned on
NO
Replace the main P.C. board (WP-003)
• Conduction check of micro-switch
)
To item Only indoor fan does not operate
Replace the main P.C. board (WP-003).
• How to check output of the air purifier
NO
YES
GND
Be sure not to come to
[
contact to the silver part
or not to touch the
ionized cables.
YES
NO
YES
NO
No trouble
FILE NO. SVM-05016
Replace micro-switch.
Push the switch
ON
ON
Releaes the switch
OFF
Tester
<Caution on High Voltage!!>
Collector
output
Ionizer
Output
]
High-voltage tester
Replace the high-voltage unit.