Technical and Service Manual

28
7-6. TROUBLE CRITERION OF MAIN PARTS
SEZ-KD09NA4.TH
SEZ-KD12NA4.TH
SEZ-KD15NA4.TH
SEZ-KD18NA4.TH
Room temperature
thermistor
(TH1)
Condenser/evaporator
temperature thermistor
(TH5)
Measure the resistance with a tester.
(Part temperature 10°C(50°F) ~ 30°C(86°F))
Pipe temperature
thermistor/liquid
(TH2)
Wiring diagram
Check method and criterion
Part name
Normal
8kΩ~20kΩ
Abnormal
Opened or short-circuited
Motor
Board with build-in motor
Current detecting resistor
Regulator Hall IC
Motor winding
Power
device
Pre
driver
Vm (Power supply for motor)
Vcc (Power supply for control)
Vsp (Speed command voltage)
PG (Pulse output for rotation)
GND