TROUBLESHOOTING
D
Display
PPossible cause/Suggested solution
Internal fault 104
The power fail input is open circuit.
Check that control voltage is available.
There may be a wiring fault.
This trip is not adjustable.
Internal fault 105
The power interface board is faulty or damaged. Replace the board.
This trip is not adjustable.
Internal fault 106
The selected configuration for the CT ratio selection switches on the power interface board is
not valid.
Check the DIP switch settings on the interface PCB. Refer to
Ground Current.
This trip is not adjustable.
Internal fault X
The MVS has tripped on an internal fault. Contact your local supplier with the fault code (X).
Related parameters: None
L1 phase loss
L2 phase loss
L3 phase loss
During pre-start checks the starter has detected a phase loss as indicated.
In run state, the starter has detected that the current on the affected phase has dropped below
2% of the programmed motor FLC for more than 1 second, indicating that either the incoming
phase or connection to the motor has been lost.
Check the supply and the input and output connections at the starter and at the motor end.
Phase loss can also be caused by a failed SCR, particularly an SCR that has failed open circuit.
A failed SCR can only be definitely diagnosed by replacing the SCR and checking the starter's
performance.
Related parameters: None
L1-T1 shorted
L2-T2 shorted
L3-T3 shorted
During prestart checks the starter has detected a shorted power assembly or a short within the
bypass contactor as indicated.
This trip is not adjustable.
Low Control Volts
Control voltage to the controller has dropped below the required level.
This trip is not adjustable.
Low Level
This is a name selected for a programmable input. Refer to Input A trip.
Low Pressure
This is a name selected for a programmable input. Refer to Input A trip.
Motor connection
There is a problem with the soft starter's connection to the motor. If only one phase is
affected, the error message will indicate which phase (T1, T2, T3).
Ensure the motor is connected to terminals T1, T2, T3 using in-line (three wire)
connection. The MVS does not support inside delta (six wire) connection.
Check that the fibre-optic cables between the power interface board and the MVS are
firmly connected.
Check each output phase of the soft starter for power circuit continuity.
This trip will also occur when there is a phase imbalance across the soft starter’s input terminals
L1, L2, L3, during starting and stopping.
Related parameters: None
Motor Connection
Tx
Where 'X' is 1, 2 or 3.
The motor is not connected correctly to the soft starter.
Check individual motor connections to the soft starter for power circuit continuity.
Check connections at the motor terminal box.
This trip is not adjustable.
Related parameters: None
Motor overload
The motor has reached its maximum thermal capacity. Overload can be caused by:
The soft starter protection settings not matching the motor thermal capacity
Excessive starts per hour
Excessive throughput
Damage to the motor windings
Resolve the cause of the overload and allow the motor to cool.
Related parameters: 1A, 1B, 1C, 1D, 9B, 16A
Motor Prot
This is a name selected for a programmable input. Refer to Input A trip.
Motor Temp
This is a name selected for a programmable input. Refer to Input A trip.
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MVS Panel User Manual
710-13937-00C
Содержание MVSxxxx-V02
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