Fujitsu AUXG36KRLB, Service Manual

Page: 104 / 169

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Models: AOYG45KQTA and AOYG54KQTA
Check point 1. Check connection
• Check terminal connection of compressor (loose or incorrect wiring)
R(U)
(RED)
S(V)
(WHITE)
T(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:
• AOYG45KQTA: 1.774 Ω at 20 °C
• AOYG54KQTA: 1.546 Ω at 20 °C
R(U)
T(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
- (03-54) -
4. Service parts information
TROUBLESHOOTING TROUBLESHOOTING