Mitsubishi Electric MSZ-HM09NA-U1 Service Manual page 21

9-5. TROUBLE CRITERION OF MAIN PARTS
MSZ-HM09NA MSZ-HM12NA MSZ-HM15NA MSZ-HM18NA MSZ-HM24NA
Part name
Room temperature
thermistor (RT11)
Indoor coil thermistor
(RT12, RT13)
Indoor fan motor (MF)
Horizontal vane motor (MV)
OBH746B
Check method and criterion
Measure the resistance with a tester.
Refer to 9-7. "Test point diagram and voltage", 1 or 2. "Indoor electronic
control P.C. board", for the chart of thermistor.
Check 9-6.
Measure the resistance between the terminals with a tester.
(Part temperature 50 - 86°F (10 - 30°C))
Color of the lead wire
RED-BLK
Normal
223 - 268
21
Figure
BLK
ROTOR
ROTOR
BLK
RED
BLK BLK