High Wall, Heat Pump Type
Service Manual
90
Toshiba
P.C. Board Layout
Sensor characteristic table
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.
1. Check whether or not the compressor
operates.
2. Check whether or not the OPERATION
indicator flashes.
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
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.)
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.
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.
No.
Procedure
Check points
Causes
L01
DB01
C03
T101
IC801
GND
+5V
+12V
100
30
40
50
60
70
80
90
20
10
0
0
10
20
30
40
50
Resistance value (k
Ω
)
Temperature (°C)
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
TA, TC, TCj, TO, TE, TS
TD
+00A08-010_01EN_SVM_HighWallHeatPump.book Page 90 Wednesday, March 4, 2009 11:22 AM
