MFC Kit Instructions
6.0 Troubleshooting
52
6.0
Troubleshooting
MFC sine wave filter components have been designed to provide a service life that equals or
exceeds the life of the variable frequency drive. The following periodic maintenance is
recommended to ensure that the MFC sine wave filter kit will perform reliably and provide the
expected service life.
Troubleshooting
Warning
Only qualified electricians should carry out all electrical installation & maintenance work
on the Sine wave filter.
Disconnect all sources of power to the MFC and connected equipment before working
on the equipment. Do not attempt any work on a powered MFC.
The MFC unit contains high voltage and capacitors. Wait at least five minutes after
disconnecting power from the filter before attempting to service the conditioner. Check
for zero voltage between all terminals on the capacitors. Also, check for zero voltage
between all phases of the input and output lines. All maintenance and troubleshooting
must be done by a qualified electrician. Failure to follow standard safety procedures
may result in death or serious injury.
Unless an external disconnect means has
been provided everything ahead of the filter circuit breaker, including the
reactors, will still be energized.
The connectivity board has been thoroughly inspected and functionally tested at the factory and
carefully packaged for shipment. After receiving the unit, immediately inspect the shipping
container and report any damage to the carrier that delivered the unit. Verify that the part number
of the unit received is the same as the part number listed on the purchase order.
The MFC is comprised of three major components; the PQconnect connectivity board, the tuning
reactor, and the capacitors. The PQconnect PCB contains diagnostic LEDs. The locations of
the LEDs are shown in Figure 24 and their functions are listed in Table 27.
Figure 24: PQconnect LED Placements
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Summary of Contents for MFC A
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