100
30
40
50
60
70
80
90
20
10
0
0
10
20
30
40
50
Resistance value (k
)
Temperature (˚C)
TD
: Discharge temp. sensor
TA
: Room temp. sensor
TC
: Heat exchanger temp. sensor
TO : Outdoor temp. sensor
TE : Outdoor heat exchanger temp.
sensor.
TA, TC, TO, TE
TD
<Sensor characteristic table>
FILE NO. SVM-10017
No.
6
7
Procedure
Check points
Causes
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.
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 whether or not the com-
pressor 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.
1. The temperature of the indoor heat
exchanger is extremely high.
2. The connection of the heat
exchanger sensor short-circuited.
(CN62)
3. The heat exchanger sensor and the
P.C. board are defective.
(Refer to Table 11-4-1.)
4. The main P.C. board is defective
1. The indoor fan motor is defective.
(Protected operation of P.C. board.)
2. The P.C. board is defective.
3. The connection of the motor
connector is loose.
–
69
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