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MFC Kit Instructions
Debug Status Conditions
Based on the fault condition there are various ways a fault can appear. Before investigating the
sine wave filter internally, disengage supply voltage to the filter.
Table 30: Fault conditions
Status detection
Overvoltage Phase
A, B, or C
Phase Loss Phase
A, B, or C
High THVD Phase
A, B, or C
PCB Under
Temperature
PCB Over
Temperature
CPU Error
Reactor Switch
Periodic Maintenance
Warning
• Check to see that the installation environment remains free from exposure to excessive dirt
and contaminants. Refer to the Pre-installation Planning section of this manual.
• Check to make sure that the enclosure ventilation openings are clean and unobstructed.
• Inspect the interior of the enclosure for signs of overheated components. Clean the interior of
the enclosure whenever excess dirt has accumulated.
• Check the integrity of all power and ground connections.
• All electrical connections must be re-torqued annually.
Description
Filter has detected
overvoltage on a
phase(s)
Filter phase loss
High voltage Total
Harmonic Distortion
Filter ambient
temperature is operating
below threshold
Filter ambient
temperature is operating
above threshold
Processor malfunction
Reactor Thermal Switch
open
Only qualified electricians should carry out all electrical installation and
maintenance work on the MFC sine wave filter. Disconnect all sources
of power to the VFD and MFC sine wave filter before working on the
equipment. Do not attempt any work on a powered MFC sine wave filter.
55
Debug
Check input power connections to the filter. Check
system voltage setpoint
Check fused disconnect or circuit breaker upstream of
the filter.
Check input power connections to the filter
Check fuses leading to filter capacitors
If fuses are not blown, measure Capacitance of the
capacitors
Check power connections of the unit, reference drawing
24281-1PQ
Check fuses of control power transformers leading to
the heater.
Check connections to relay input headers J7/J8
Check fuses of control power transformers leading to
fans.
Make sure fans are operating
Power cycle unit and if issue persists upgrade firmware
and/or contact tech support
Check thermal switch connections to PCB. Reactor
switch is a normally closed switch that opens if reactor
overheats.
6.0 Troubleshooting
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