Mitsubishi Electric MSZ-FD25VA Service Manual page 27

10-5. TROUBLE CRITERION OF MAIN PARTS
MSZ-FD25VA MSZ-FD25VAS MSZ-FD35VA MSZ-FD35VAS
Part name
Room temperature
thermistor(RT11)
Indoor coil thermistor
(RT12, RT13)
Indoor fan motor(MF)
Horizontal vane
motor(MV1)
Vertical vane
motor(MV2)
i-see Sensor
motor(MT)
i-see Sensor(RR)
PLASMA electrode unit
Check method and criterion
Measure the resistance with a tester.
Refer to 10-7. "Test point diagram and voltage", "Indoor electronic control
P.C. board", the chart of thermistor.
Check 10-6. A.
Measure the resistance between the terminals with a tester.
(Part temperature 10 ~ 30 C)
Color of the lead wire Normal
BRN-other one 336 " ~ 364 "
Measure the resistance between the terminals with a tester.
(Part temperature 10 ~ 30 C)
Color of the lead wire Normal
BRN-other one 282 " ~ 306 "
Cover the i-see Sensor with black vinyl tape. Then, turn ON the power
supply. (i-see Sensor is energized.) Measure the voltage between
connector terminals of i-see Sensor with a tester.
(Part temperature 10 ~ 40 C)
i-see Sensor
i-see Sensor P.C. board
Black vinyl tape
i-see Sensor
Normal range
connector terminals
2(GND) - 4(+)
1.874 ~ 3.387 VDC
1(+) - 2(GND)
1.010 ~ 1.420 VDC
NOTE: Pay attention to static electricity.
Check 10-6. F
w
Cover the i-see
4
Sensor with
3
black vinyl tape.
2(GND)
1
connector
27
Figure
RED
ROTOR
YLW
BRN
ORN GRN
RED
ROTOR
YLW
BRN
ORN GRN