TROUBLESHOOTING
MVE User Manual (710-17074-00G) |
67
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Possible cause/Suggested solution
Current imbalance
Current imbalance can be caused by problems with the motor, the environment or the installation, such
as:
•
An imbalance in the incoming mains voltage
•
A problem with the motor windings
•
A light load on the motor
•
A phase loss on input terminals L1, L2 or L3 during Run mode
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: 4H, 4I, 16E
Current Read Err
Lx
Where 'X' is 1, 2 or 3.
Internal fault (PCB fault). The output from the CT circuit is not close enough to zero when the SCRs are
turned off. Contact your local supplier for advice.
This trip is not adjustable.
Related parameters: None
EEPROM fail
•
An error occurred loading data from the EEPROM to RAM when the controller powered up.
•
"Load User Set" has been selected but no saved file is available.
Reset the fault and then reload the default settings. If the problem persists, contact your local
distributor.
Related parameters: None
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 MVE 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
