GE AF-600 FP Series Design And Installation Manual page 88

Basic Troubleshooting
Symptom
Acoustic noise or vibration
(e.g. a fan blade is making Resonances, e.g. in the motor/fan
noise or vibrations at system
certain frequencies)
Table 11.1 Troubleshooting
TM
AF-600 FP Design and Installation Guide
Possible cause
Bypass critical frequencies by using
parameters in parameter group
C-0#
Turn off over-modulation in
F-38 Overmodulation
Change switching pattern and
frequency in parameter group F-3#
Increase Resonance Dampening in
H-64 Resonance Dampening
DET-768b
Test
Check if noise and/or vibration
have been reduced to an
acceptable limit
Solution
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