MFC Kit Instructions
6.0 Troubleshooting
56
Evaluating MFC Sine Wave Filter Performance
The MFC sine wave filter performance can be evaluated by checking the output voltage waveform
with an oscilloscope.
Figure 25: Waveform at Input to MFC Sine Wave Filter
This waveform illustrates typical drive output and filter input voltages when measured from line to
line.
Figure 26: Waveform at MFC Sine Wave Filter Output
This waveform illustrates typical filter output voltage waveform when measured from line to line. If
the measured waveform does not resemble a sine wave like this illustration, and looks more like
the filter input waveform, troubleshoot filter wiring and components.
Warning
Only qualified electricians should carry out all electrical installation
and maintenance work on the MFC sine wave filter. Exercise
caution when checking waveforms with an oscilloscope. Use a
dual probe, differential input set-up, or other means of isolating
the scope chassis from the VFD output or filter output. Disconnect
power when attaching and removing the probes.
Replacement Parts
If replacement parts are needed, please contact your TCI representative. To ensure that the MFC
sine wave filter continues to perform to its original specifications, replacement parts should conform
to TCI specifications.
Factory Contacts and Tech Support
For technical support, contact your local TCI distributor or sales representative. You can contact
TCI directly at 800-824-8282. Select "Customer Service" or "Technical Support" and have your
product information available.
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