AuCom MVE series User Manual page 72

Symptom
Motor does not reach full speed.
Erratic motor operation.
Soft stop ends too quickly.
Remote start/stop command is
overriding Auto-Stop settings when using
remote two-wire control.
Parameter settings cannot be stored.
ATTENTION! Remove Mains Volts
Current values shown on the display are
incorrect.
Probable Cause
• If the start current is too low, the motor will not produce enough torque to
accelerate to full speed. The soft starter may trip on excess start time.
NOTE
Make sure the motor starting parameters are appropriate for the
application and that you are using the intended motor starting profile. If a
programmable input is set to Motor Set Select, check that the
corresponding input is in the expected state.
The load may be jammed. Check the load for severe overloading or a locked rotor
•
situation.
The SCRs in the MVE require at least 5 A of current to latch. If you are testing the
•
soft starter on a motor with full load current less than 5 A, the SCRs may not latch
correctly.
• The soft stop settings may not be appropriate for the motor and load. Review the
soft stop settings.
If the motor is very lightly loaded, soft stop will have limited effect.
•
• Auto-Stop should only be used in remote mode with three-wire or four-wire
control.
Make sure you are saving the new value by pressing the STORE button after
•
adjusting a parameter setting. If you press EXIT, the change will not be saved.
Check that the adjustment lock (parameter 15B) is set to
•
adjustment lock is set to
need to know the security access code to change the adjustment lock setting.
• The EEPROM may be faulty on the controller. A faulty EEPROM will also trip the
soft starter, and the controller will display the message Parameter Out Of Range.
Contact your local supplier for advice.
• The soft starter will not activate Run Simulation with three-phase power
connected. This prevents unintentional direct on-line (DOL) start.
• Check that the setting of the CT ratio selector DIP switch on the power interface
board matches the ratio of the CT used. Refer to
Read Only
, settings can be viewed but not changed. You
CT Current Measurement
MVE User Manual (710-17074-00G) |
TROUBLESHOOTING
Read & Write
. If the
.
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