Toshiba RAS-10JKVP-E Service Manual page 68

(3) Check procedures
No. Procedure
1 Turn off the power supply and
remove the P .C. board assembly
from electronic parts base.
Remove the connecting cables
from the terminal block.
2 Remove the connector of the
motor and turn on the power
supply. If OPERATION lamp
flashes (once per second), it is
not necessary to check steps (1
to 3) in the right next column.
3 Push [START/STOP] button once
to start the unit. (Do not set the
mode to Fan Only or On-Timer
operation.)
4 Shorten the line of the restart
delay timer and start unit.
5 Push [START/STOP] button once
to start the unit,
• Shorten the time of the restart
delay timer.
• Set the operation mode to
COOL.
• Set the fan speed level to
AUTO.
• Set the preset temperature
much lower than the room
temperature. (The unit (com-
pressor) operates continuously
in the above condition.)
6 If the above condition (No. 5) still
continues, start the unit in the
following condition.
• Set the operation mode to
HEAT.
• Set the preset temperature
much higher than room tem-
perature.
7 Connect the motor connector to
the motor and turn on the power
supply.
Start the unit the following
condition.
• Set the operation mode to FAN.
• Set the fan speed level to
HIGH. (The unit (compressor)
operates continuously in the
above condition.)
Table 10-9-1
Check points
Check whether or not the fuse
(F01) is blown.
Check power supply voltage :
1. Between No. 1 and No. 3 of CN23
(AC 220–240V)
2. Between + and –
(DC 310–340V)
3. Between – of C10 and output
side of IC08 (DC 15V)
4. Between 12V and GND
5. Between 5V and GND
Check power supply voltage :
1. Between No. 1 of CN21 and
No. 1 of CN23 (DC 15–60V)
Check whether or not all lamps
(OPERATION, TIMER, PRE.-DEF.,
Filter CHECK, FILTER. Fitered and
Hi-Power are indicated for 3
seconds and they return to normal
3 seconds later.
1. Check whether or not the
compressor operates.
2. Check whether or not the
OPERATION lamp flashes.
1. Check whether or not the
compressor operates.
2. Check whether or not the
OPERATION lamp flashes.
1. Check it is impossible to detect
the voltage (DC 15V) between 3
and 4 of the motor terminals.
2. The motor does not operate or
the fan motor does not rotate
with high speed.
(But it is possible to receive the
signal from the remote controller.)
3. The motor rotates but vibrates
strongly.
– 68 –
Causes
Impulse voltage was applied or the
indoor fan motor short-circuited.
1. The terminal block or the crossover
cable is connected wrongly.
2. The capacitor (C01), line filter (L01),
resistor (R01), or the diode (DB01)
is defective.
3. IC01, IC02 and T01 are defective.
4. IC01, IC02 and T01 are defective.
5. IC01, IC02, IC07 and T01 are
defective.
<Heating and cooling model>
IC03 and IC04 are defective.
The lamps are defective or the housing
assembly (CN13) is defective.
1. The temperature of the indoor heat
exchanger is extremely low.
2. The connection of the heat ex-
changer sensor is loose.
(The connector is disconnected.)
(CN01)
3. The heat exchanger sensor and the
P .C. board are defective.
(Refer to Table 10-4-1.)
4. The main P.C. board is defective.
1. The temperature of the indoor heat
exchanger is extremely high.
2. The connection of the heat ex-
changer sensor short-circuited.
(CN01)
3. The heat exchanger sensor and the
P .C. board are defective.
(Refer to Table 10-4-1.)
4. The main P.C. board is defective
1. The indoor fan motor is defective.
(Protected operation of P.C. board.)
2. The connection of the motor
connector is loose.
3. The P .C. board is defective.