Danfoss VLT AQUA Drive FC 202 Operating Instructions Manual page 60

0,25-90 kw

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Basic Troubleshooting

Symptom

Acoustic noise or vibration

Table 9.1 Troubleshooting

Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.ctiautomation.net - Email: info@ctiautomation.net

VLT

AQUA Drive

Operating Instructions

Possible cause

Resonances

MG20M902 - VLT

Test

Bypass critical frequencies by using

parameters in parameter group

4-6* Speed Bypass

Turn off over-modulation in

14-03 Overmodulation

Change switching pattern and

frequency in parameter group

14-0* Inverter Switching

Increase Resonance Dampening in

1-64 Resonance Dampening

is a registered Danfoss trademark

Solution

Check if noise and/or vibration

have been reduced to an

acceptable limit

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