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TROUBLESHOOTING
D
Display
PPossible cause/Suggested solution
Excess start time
The motor was unable to accelerate to full speed in the time allowed.
Excess start time trip can occur in the following conditions:
parameter 1A
Motor Full Load Current is not appropriate for the motor
parameter 2D
Current Limit has been set too low
parameter 2B
Start Ramp Time has been set greater than the setting for 4A Excess Start
Time setting
The motor may have experienced an abnormal increase in loading or might be jammed.
Related parameters:1A, 2A-2D, 4A, 16B
Feeder Prot
This is a name selected for a programmable input. Refer to Input A trip.
Field Trip
This is a name selected for a programmable input. Refer to Input A trip.
Frequency
The mains frequency has gone beyond the specified range.
Check for other equipment in the area that could be affecting the mains supply, particularly
variable speed drives and switch mode power supplies (SMPS).
If the MVS is connected to a generator set supply, the generator may be too small or could
have a speed regulation problem.
Related parameters: 4J, 4K, 4L, 16F
Ground fault
Ground current (monitored through a dedicated current transformer) has exceeded the
selected level. Test the insulation of the output cables and the motor. Identify and resolve the
cause of any ground fault.
Related parameters: 4O, 4P, 16N
Heatsink
overtemperature
The soft starter is operating at a dangerously high temperature.
Check if ventilation and cooling are adequate.
Reduce the number of consecutive starts by increasing the value set in parameter 4M
Restart Delay.
Related parameters: 4M
High Level
This is a name selected for a programmable input. Refer to Input A trip.
High Pressure
This is a name selected for a programmable input. Refer to Input A trip.
Input A trip
The soft starter's programmable input is set to a trip function and has activated. Resolve the
trigger condition.
Related parameters: 6A, 6B, 6C, 6D, 6E, 6F, 6G, 6H, 6I, 6J, 16G, 16H
Instantaneous
overcurrent
There has been a sharp rise in motor current, probably caused by a locked rotor condition
(shearpin) while running. This may indicate a jammed load.
A trip may also occur when a medium level fault current has been detected. This may indicate
a system short circuit.
Related parameters: 4E, 4F, 16D
Instantaneous
overcurrent S2
There has been a sharp rise in output current, possibly caused by a short circuit condition.
Identify and resolve the cause of the fault.
Related parameters: 4U, 4V, 16D
Int Comms Fail
Communication has failed between the controller and the power interface board.
Check that the controller is receiving control voltage within the specified range (terminals
A11, A12).
Check that the fibre-optic cables between the controller and the interface board are firmly
connected.
Check that each fibre-optic cable is emitting light at the Rx end.
This trip is not adjustable.
Interlock Trip
This is a name selected for a programmable input. Refer to Input A trip.
Internal fault 94 ~
Internal fault 98
There has been an internal communication error within the soft starter. Remove then restore
control power.
This trip is not adjustable.
Internal fault 99 -
Internal fault 101
There is a problem with the non-conduction fibre-optic connections. Internal Fault 99
corresponds to phase 1, Internal Fault 100 corresponds to phase 2, Internal Fault 101
corresponds to phase 3.
Check that the fibre-optic cable is properly connected between the non-conduction PCB
on the phase arm and the non-conduction readback connector on the power interface
board.
If the problem persists, replace the fibre-optic cable.
This trip is not adjustable.
710-13937-00C
MVS Panel User Manual
73
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