Abnormal Noise - Fujitsu AUXB04GALH Service Manual

Trouble shooting 71

Abnormal Noise

Diagnosis method when Abnormal Noise is occurred
Abnormal noise is coming from Indoor Unit
(Check and correct followings)
Is Main Unit installed in stable condition?
Is the installation of Air suction grille and front panel normal?
In case of Duct type : Is Static Pressure range normal?
(Refer to Data & Technical Manual)
OK
Is Fan broken or deformed?
Is the screw of Fan loose?
Is there any object which obstruct the Fan rotation?
Attention!!
If Refrigerant Noise is occurring, Check if the Indoor and
Outdoor Thermistor is wrongly installed. Check and
correct the thermistor.
Check the refrigerant additional charging amount.
When the refrigerant is not enough, add the refrigerant.
However, the total refrigerant amount is prevented from
more than 15.7kg.
Forecast of Cause :
1. Abnormal installation (Indoor/Outdoor) 2. Fan failure(Indoor/Outdoor)
3. EEV failure (Indoor) 4. Compressor failure (Outdoor)
Is Main Unit installed in stable condition?
Is Bell Mouth installed normally?
Is Fan broken or deformed?
Is the screw of Fan loose?
Is there any object which obstruct the Fan rotation?
Check if vibration noise by loose bolt or contact noise of
piping is happening.
Is Compressor locked?
>> Check Compressor (Refer to Service Parts Information)
04-79
Abnormal noise is coming from Outdoor Unit
(Check and correct followings)
OK
OK
OK