Trouble Criterion Of Main Parts - Mitsubishi Electric Mr. SLIM SEZ Series Technical & Service Manual

[ VII TROUBLESHOOTING ]

7. TROUBLE CRITERION OF MAIN PARTS

SEZ-M25DA(L)2
SEZ-M35DA(L)2
SEZ-M50DA(L)2
SEZ-M60DA(L)2
SEZ-M71DA(L)2
Part name
Room temperature
thermistor
(TH1)
Pipe temperature
thermistor/liquid
(TH2)
Condenser/evaporator
temperature thermistor
(TH5)
Wiring diagram
HWE2101A
Check method and criterion
Measure the resistance with a tester.
(Part temperature 10°C ~ 30°C)
Normal
8kΩ~20kΩ
Vm (Power supply for motor)
Vcc (Power supply for control)
Vsp (Speed command voltage)
PG (Pulse output for rotation)
GND
Abnormal
Opened or short-circuited
Board with build-in motor
Regulator Hall IC
Current detecting resistor
- 42 -
Motor
Motor winding
Power Pre
device driver
GB