Abnormal Noise; Diagnosis Method When Abnormal Noise Is Occurred - Fujitsu Airstage VR-II Series Service Manual

Trouble shooting 78

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.
Diagnosis method when Abnormal Noise is occurred
Abnormal noise is coming from RB Unit
(Check and correct followings)
Is Main Unit installed in stable condition?
Is the limitation of connectable number of indoor unit and
connectable total capacity of indoor unit correct?
Is Pipe connection correct?
(Wrong pipe connection - Gas pipe, Suction pipe, Liquid pipe -
Check pipe size, Crosover connection between pipe and
Network cable)
OK
Are solenoid valve connectors correct position ?
(Check the color of connectors)
Are solenoid valves operation correct ?
(Check the coil of SV's, Open / Short, Click sound at ON state)
Forecast of Cause :
1. Abnormal installation (Indoor/Outdoor / RB Unit) 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 (Service Parts Information 2,3)
04-87
Abnormal noise is coming from Outdoor Unit
(Check and correct followings)
OK
OK
OK