BENSHAW RediStart MX3 Series, User Manual

Page: 198 / 238

190
8 - TROUBLESHOOTING & MAINTENANCE
Fault Code Description Detailed Description of Fault / Possible Solutions
F23 Low Line L3-L1
Low voltage below the Under voltage Trip Level parameter setting (PFN11) was
detected for longer than the Over/Under Voltage Trip delay time (PFN12).
Verify that the actual input voltage level is correct.
Verify that the Rated Voltage parameter (FUN05) is set correctly.
Check input supply for open fuses or open connections.
On medium voltage systems, verify wiring of the voltage feedback measurement
circuit.
F24 High Line L1-L2
High voltage above the Over voltage Trip Level parameter setting (PFN10) was
detected for longer than the Over/Under Voltage Trip delay time (PFN12).
Verify that the actual input voltage level is correct.
Verify that the Rated Voltage parameter (FUN05) is set correctly.
Line power quality problems/ excessive line distortions.
F25 High Line L2-L3
High voltage above the Over voltage Trip Level parameter setting (PFN10) was
detected for longer than the Over/Under Voltage Trip delay time (PFN12).
Verify that the actual input voltage level is correct.
Verify that the Rated Voltage parameter (FUN05) is set correctly.
Line power quality problems/ excessive line distortions.
F26 High Line L3-L1
High voltage above the Over voltage Trip Level parameter setting (PFN10) was
detected for longer than the Over/Under Voltage Trip delay time (PFN12).
Verify that the actual input voltage level is correct.
Verify that the Rated Voltage parameter (FUN05) is set correctly.
Line power quality problems/ excessive line distortions.
F27 Phase Loss
The MX
3
has detected the loss of one or more input or output phases when the
starter was running. Can also be caused by line power dropouts.
Check input supply for open fuses.
Check power supply wiring for open or intermittent connections.
Check motor wiring for open or intermittent connections.
On medium voltage systems, verify wiring of the voltage feedback measurement
circuit.
Check Gate and Cathode connections to MX
3
card.
F28 No Line
No input voltage was detected for longer than the Inline Configuration time delay
parameter setting ( I/O24) when a start command was given to the starter.
If an inline contactor is being used, verify that the setting of the Inline
Configuration time delay parameter (I/O24) allows enough time for the inline
contactor to completely close.
Check input supply for open disconnects, open fuses, open circuit breakers or
disconnected wiring.
Verify that the SCR gate wires are properly connected to the MX
3
control card.
On medium voltage systems, verify wiring of the voltage feedback measurement
circuit.
F29 PORT Timeout
PORT fault timer timed out before line power returned.
Extend PORT fault time parameter (FUN10) if possible.
F30
I.O.C.
(Instantaneous Over current)
During operation, the MX
3
detected a very high level of current in one or more
phases.
Check motor wiring for short circuits or ground faults.
Check motor for short circuits or ground faults.
Check if power factor or surge capacitors are installed on the motor side of the
starter.
Verify that the motor FLA (QST01) and CT ratio (FUN03) settings are correct.