Fujitsu ASU18RMLQ Service Instruction page 72

SERVICE PARTS INFORMATION 2
Inverter Compressor
Check Point 1 : Check Connection
Check terminal connection of Compressor
(loose or incorrect wiring)
Terminal cover opened
W W
(BLACK) (BLACK)
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.
U U
(RED) (RED)
V V
(WHITE) (WHITE)
or infinite, replace Compressor.
Resistance Value : 0.88
V
02-46
Check connection of Main PCB
(Loose or incorrect wiring)
W304
MAIN PCB
W305
RED
WHITE
Compressor
at 68°F(20°C)
W303
BLACK