Fujitsu ASUH09LPAS Service Manual page 79

4-2. Inverter compressor
Check point 1. Check connection
• Check terminal connection of compressor (loose or incorrect wiring)
• Check terminal connection of main PCB (loose or incorrect wiring)
↓
Check point 2. Check winding resistance
Check winding resistance of each terminal.
Resistance value
• 09 model: 2.180 Ω at 68°F (20°C)
• 12 model: 1.975 Ω ±7 % at 77°F (25°C)
C(W)
→ If the resistance value is 0 Ω or infinite, replace compressor.
↓
Check point 3. Replace inverter PCB
If check point 1 to 2 do not improve the symptom, replace main PCB.
4-2. Inverter compressor
S(V)
(WHITE)
Main PCB
R(U)
(RED)
Main PCB
W400(U) W401(V)
RED
Compressor
RED
R(U)
WHITE
S(V)
BLACK
- (03-37) -
C (W)
(BLACK)
W402(W)
BLACK
WHITE
4. Service parts information