Toshiba RAS-07PKVP-E Service Manual page 90

High Wall, Heat Pump Type
No. Procedure
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.
6
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.
7 (The unit (compressor) operates
continuously in the above condition in No.
5.)
P.C. Board Layout
Sensor characteristic table
100
90
80
70
60
50
40
30
20
10
0
0 10 20
Temperature (°C)
1. Check whether or not the compressor
operates.
2. Check whether or not the OPERATION
indicator 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.
+12V
L01
DB01
C03
TD
TA, TC, TCj, TO, TE, TS
30 40 50
Check points
+5V GND
IC801
T101
TD : Discharge temp. sensor
TA : Room temp. sensor
TC, TCj : Heat exchanger temp. sensor
TO : Outdoor temp. sensor
TE : Outdoor heat exchanger temp. sensor
TS : Suction temp. sensor
90
Service Manual
Causes
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 10-6-1.)
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.