Danfoss VLT AQUA Drive FC 202 Instruction Manual page 53

Maintenance, Diagnostics an...
Symptom Possible cause
Resonances
Acoustic noise
or vibration
Table 7.6 Troubleshooting
MG20MA22
Instruction Manual
Test
Bypass critical frequencies by using
parameters in parameter group 4-6* Speed
Bypass.
Turn off over-modulation in 14-03 Overmo-
dulation.
Change switching pattern and frequency in
parameter group 14-0* Inverter Switching.
Increase Resonance Dampening in
1-64 Resonance Damping.
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Solution
Check if noise and/or vibration have been
reduced to an acceptable limit.
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