Mitsubishi Electric SVZ-KP18NA Service Manual page 26

I Check of outdoor fan motor
SUZ-KA09/12/15NA
Disconnect CN932 from the inverter P.C. board,
and measure the resistance of the outdoor fan
motor.
Is the resistance of outdoor fan motor normal?
(Refer to "10-4. TROUBLE CRITERION OF MAIN PARTS".)
Replace the inverter P.C. board.
SUZ-KA18NA
Check the connection between the
connector CN931 and CN932.
Is the resistance between each termi-
nal of outdoor fan motor normal?
(Refer to"10-4. TROUBLE CRITERION
OF MAIN PARTS".)
No
Replace the outdoor fan motor.
TCH022
Yes
Yes
(Fixed to either 5 or 0 VDC)
Replace the outdoor fan motor.
No
Disconnect CN932 from the inverter P.C. board, and turn on the
power supply.
Rotate the outdoor fan motor manually and measure the voltage
of CN931.
Between 1(+) and 5(-)
Between 2(+) and 5(-)
Between 3(+) and 5(-)
Does the voltage between each terminal become 5 and 0
No
VDC repeatedly?
Does the outdoor fan motor rotate smoothly?
No
Replace the inverter P.C. board.
26
Yes
Yes