Fujitsu Comfort Series Service Manual page 49

Troubleshooting 27
Abnormal Noise (Outdoor)
Diagnosis method when Abnormal Noise is occurred
Is Main Unit installed in stable condition?
Is Fan Guard installed normally?
OK
Is Fan broken or deformed?
Is the screw of Fan loose?
Is there any object which obstruct the Fan rotation?
OK
Check if vibration noise by loose bolt or contact noise
of piping is happening.
OK
Is Compressor locked?
>> Check Compressor (PARTS INFORMATION 1,2)
Forecast of Cause :
1. Abnormal installation
2. Fan failure
3. Compressor failure
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