Toshiba RAS-12KSX-1 Service Manual page 46

(3) Checking procedure
No. Pr ocedure
1 Shut off the power supply and
remove the P.C. board assembly
from the electronic parts base.
Remove the connecting cable from
the terminal block.
2 Remove the connector for the motor,
and turn the power on.
If the OPERATION lamp blinks
(0.5 sec. : ON, 0.5 sec. : OFF) when
the power turning on, the checking
points described as 1-4 of right
column are not necessary to
perform.
3 Make the operation status by
pushing once the [
button, except the status of [FAN
ONLY], [ON TIMER].
4 Start the operation with the system
which the time of the restart delay
timer is shortened.
5 Make the operation status by
pressing once the [
button.
1. The time of the restart delay timer
is shortened.
2. Cool operation
3. Air volume [AUTO]
4. Make the setting temperature lower
enough than room temperature.
5. Continuous operation.
6 Turn the power on after connecting
the motor connector. Start the
operation with the following
condition.
1. Operation [Cooling]
2. Airflow [High fan]
3. Continuous operation
T ab
Check Point (Symptom)
1. Is the fuse blown?
V oltage chec
1.Betw een
(AC 220~240V)
2. Betw een + and − of C27
(DC 310 ~ 390V)
3. Between
4 . Between
Voltage check
1. Voltage of relay coil. (DC 12V)
]
Between pin 2 of RY01 and
2.Between No. 1 and 2 of
connecting cable terminal block.
(AC 220~240V)
1. All indicators light for 3 sec..
2. Indicators do not indicate normally
after approximate 3 sec..
1. Compressor does not operate.
2. OPERATION lamp blinks.
]
1.Motor does not rotate. (The key
operation is accepted.)
2. The Motor rotates, but it vibrates
too much.
le 9-6-1
k
of RY01 and CN31
3
and
GND
12V
and
GND
5V
GND
− 45 −
FILE NO. SVM-08029
Causes
1. • Application of shoc k v oltage.
Ov er load b y shor t-circuit of the
•
par ts .
1. • A C po wer cord is def ectiv
• P oor contact of the ter minal plate.
• Miss wir ing of the po wer rela
2. Capacitor (C25, C26, C27) is
•
defective.
Line filter (L01) is def ectiv
•
Diode (DB01) is def
• ectiv
3 . T01 are detective.
4. IC02 are def ectiv e .
1 . Breaking wire of the rela y coil,
def ectiv e rela y dr iv er . (Q02)
2. P oor contact of rela y .
}
Def ectiv e indicator , or poor
housing assemb ly . (CN14)
1. The temperature of the indoor
heat e xchanger is abnor mally
lo w er.
2. Poor contact of the heat
exchanger sensor. (The connector
is disconnected.) (CN01)
3. Heat exchanger sensor, main
P.C. board are defective. (Refer to
Table 9-6-2 for the judgment of
defective resistance values.)
4. Main P.C. board is defective.
1. Poor contact of the motor
connector.
2. P.C. board is defective.
e .
y .
.
e .
e .