BENSHAW RediStart EXEXMVRMX3 Series, User Manual

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General Troubleshooting Charts
8.4 General Troubleshooting Charts
The following troubleshooting charts can be used to help solve many of the common issues that may occur.
8.4.1 Stack Overtemp Lockout
8.4.2 Motor does not start, no output to motor
151
8 - TROUBLESHOOTING & MAINTENANCE
Condition Cause Solution
Display screen displays what is
shown above.
OTP overtemperature relay is not energized.
Check wiring to the OTR from the Gate
Power Distributor Cards.
Factory reset in (FUN 22) was entered.
Enter the equipment specified rated
voltage in Rated Voltage (FUN05).
Enter the value of the CTs supplied with
the MVRMX3 into the CT Ratio
parameter (FUN 03).
Set DI #2 - (I/O02) to "inline confirm".
Set DI #3 - (I/O03) to "disconnect".
Set Relay #3 - (I/O12) to "running".
Display screen displays what is
shown above plus (OTS OK
LED) on any of the Distributor
Card is NOT lit.
Time between starts set too short.
Set longer time between starts to allow
heat sink cooling.
Fiber Optic connectionon Distributor. Reconnect the Fiber Optic Cables.
Transformer T3 supply to Distributor cards bad.
Check T3 primary and secondary fuses.
Correct as needed.
Check wiring to Distributor Cards and
correct as needed.
OT Switch wiring to Gate Driver Card bad.
Check wiring at TB3 on Gate Driver Card
and correct as needed.
Condition Cause Solution
Display Blank, CPU Heartbeat LED on
MX
3
board not blinking.
Control voltage absent.
Check for proper control voltage input.
Verify fuses and wiring.
MX
3
control board problem.
Consult factory.
Fault Displayed. Fault Occurred.
See fault code troubleshooting table for
more details.
Start command given but nothing
happens.
Start/Stop control input problems.
Verify that the start/stop wiring and start
input voltage levels are correct.
Control Source parameters (QST 04 - 05)
not set correctly. Verify that the parameters are set
correctly.
NOL or No Line is displayed and a start
command is given, it will fault in F28. No line voltage has been detected by the
MX
3
when a start command is given.
Check input supply for inline contactor,
open disconnects, open fuses, open circuit
breakers, or disconnected wiring.
Verify that the SCR gate wires are
properly connected to the MX
3
control
board.
On medium voltage systems, verify wiring
of the voltage feedback measurement
circuit.
See fault code troubleshooting table for
more details.
Stack Overtemp
Lockout