Fujitsu AOUH18LMAS1, Service Manual

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5. Service parts information
5-1. Compressor
Diagnosis method of compressor (If outdoor unit LED displays error, refer to troubleshooting)
Does not start up Stops soon after starting up Abnormal noise
Is there open or loose con-
nection cable?
Is there open or loose con-
nection cable?
Check if vibration noise by
loose bolt or contact noise of
piping is happening.
Check main PCB, connection
of compressor, and winding
resistance.
(Refer to the next page)
If there is no failure, the
defect of compressor is con-
sidered (Locked compressor
due to clogged dirt or less oil)
Is gas pipe valve open?
(Low pressure is too low)
Defective compressor can be
considered.
(due to inside dirt clogging or
broken component)
Replace compressor.
Check if refrigerant is
leaking.
MPa MPa
Replace compressor.
End
Check if strainer is clogged.
(Refer to outdoor EEV or
capillary tube in this chap-
ter.)
End
Check main PCB, connection of compressor and winding resis-
tance. (Refer to the next page)
If there is no failure, the defect of compressor can be consid-
ered. (Compression part broken or valve defective.)
Replace compressor.
End
5-1. Compressor
- (03-80) -
5. Service parts information
TR
O
U
B
LESH
O
O
TI
N
G
TR
O
U
B
LESH
O
O
TI
N
G