Toshiba RAS-M10PKVP-E Service Manual page 89

(3) Check procedures
No. Procedure
1 Turn off the power supply breaker
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 breaker. If OPERATION
indicator fl ashes (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 On-Timer operation.)
4 Shorten the restart delay timer and
start unit.
5 Push [START/STOP] button once
to start the unit,
• Shorten 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
(compressor) 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
temperature.
7 Connect the motor connector to
the motor and turn on the power
supply.
Start the unit the following
condition.
• Set the fan speed level to HIGH.
(The unit (compressor) operates
continuously in the above
condition in No. 5.)
Table 11-10-1
Check points
Check whether or not the fuse (F01)
is blown.
Check power supply voltage :
1. Between No. 1 and No. 3 of
CN301 (AC 220–240V)
2. Between and of C03
(DC 310–340V)
3. Between of IC122 and output
side of IC122 (DC 15V)
4. Between 12V and GND
5. Between 5V and GND
Check power supply voltage :
1. Between CN03 and CN501
(DC 15–60V)
Check whether or not all indicators
(OPERATION, TIMER, PURE) are
lit 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 indicator fl ashes.
1. Check whether or not the
compressor operates.
2. Check whether or not the
OPERATION indicator fl ashes.
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.
– 89 –
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 fi lter
(L01), resistor (R02), or the diode
(DB01) is defective.
3. IC101, IC122 and T101 are
defective.
4. IC101, IC121, IC122 and T101 are
defective.
IC501 and IC502 are defective.
The indicators are defective or
the housing assembly (CN261) is
defective.
1. The temperature of the indoor heat
exchanger is extremely low.
2. The connection of the heat
exchanger sensor is loose. (The
connector is disconnected.)
(CN602)
3. The heat exchanger sensor and
the P.C. board are defective.
(Refer to Table 11-3-1.)
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
exchanger sensor short-circuited.
(CN602)
3. The heat exchanger sensor and
the P.C. board are defective.
(Refer to Table 11-3-1.)
4. The main P.C. board is defective
1. The indoor fan motor is defective.
(Protected operation of P.C.
board.)
2. The P.C. board is defective.
3. The connection of the motor
connector is loose.