1.0 GENERAL(1.0一般).pdf
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FAN TROUBLE SHOOTING
1.0 GENERAL
Problem Possible Cause Recommended Action
1.1 Motor Noise Firstly determine if the noise is electrical If the noise doesnt stop instantly, but
or mechanical. runs down with the motor, the problem is
more likely to be mechanical, generally
the bearings; see Mechanical section
below:
If the motor is switched off and the noise
stops instantly the problem is more likely
to be electrical; see Electrical section
pages P-4/7 .
2.0 MECHANICAL
Problem Possible Cause Recommended Action
2.1 General Fan Noise The fan could be running in stall. Check the actual fan performance
against the fan curve to determine where
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