Fujitsu AOUH09LPAS1, Service Manual

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4-2. Inverter compressor
Check point 1. Check connection
• Check terminal connection of compressor (loose or incorrect wiring)
R(U)
(RED)
S(V)
(WHITE)
C (W)
(BLACK)
Main PCB
• Check terminal connection of main PCB (loose or incorrect wiring)
Main PCB
W402(W)
Compressor
BLACK
WHITE
RED
W400(U) W401(V)
↓
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)
R(U)
C(W)
S(V)
RED
WHITE
BLACK
→ 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
- (03-37) -
4. Service parts information
TROUBLESHOOTING TROUBLESHOOTING