Fujitsu ASU18RLF Service Instructions Manual page 50

SERVICE PARTS INFORMATION 2
Inverter Compressor
Check Point 1 : Check Connection
Check terminal connection of Compressor
(loose or incorrect wiring)
V
(WHITE)
Inverter PCB
U
(RED)
Check Point 2 : Check Winding Resistance
Check winding resistance of each terminal
If the resistance value is 0
U
W
Check Point 3 : Replace Main PCB
If the symptom does not change with above Check 1, 2, replace Main PCB.
W
(BLACK)
or infinite, replace Compressor.
Resistance Value :
V
IPM PCB
TM305
RED
Compressor
0.642 ± at 68°F(20°C)
02-29
TM304 TM303
BLACK
WHITE