Fujitsu ASU18RLF Service Instructions Manual page 90

SERVICE PARTS INFORMATION 2
Compressor
Test 1 : Check Connection
Check terminal connection of Compressor
(loose or incorrect wiring)
V(S)
(WHITE)
Main PCB
U(R)
(RED)
Test 2 : Check Winding Resistance
Check winding resistance of each terminal
If the resistance value is 0
U(R)
W (T)
Test 3 : Replace Main PCB
If the symptom does not change with above Check 1, 2, replace Main PCB.
(SERVICE PARTS INFORMATION 10)
W (T)
(BLACK)
or infinite, replace Compressor.
V(S)
Resistance Value : 0.642
02-50
Check terminal connection of Main PCB
(loose or incorrect wiring)
Main PCB
TM403 TM404 TM405
RED
Compressor
+ 8% (68°F(20°C))
-
BLACK
WHITE