TROUBLESHOOTING
10.
Troubleshooting
10.1
Protection Responses
When a protection condition is detected, the EMX4e will write this to the event log
and may also trip or issue a warning. The soft starter's response depends on the
Protection Action setting (parameter group 6).
Some protection responses cannot be adjusted by the user. These trips are usually
caused by external events (such as phase loss) or by a fault within the soft starter.
These trips do not have associated parameters and cannot be set to Warn or Log.
If the EMX4e trips you will need to identify and clear the condition that triggered the
trip, then reset the soft starter before restarting. To reset the starter, press the
RESET button on the keypad or activate the Reset remote input.
If the EMX4e has issued a warning, the soft starter will reset itself once the cause of
the warning has been resolved.
10.2
Trip Messages
Display
Possible cause/Suggested solution
Bypass overload
This trip is not adjustable.
Bypass overload protection protects the soft starter from severe
operating overloads while running. The soft starter will trip if it
detects overcurrent at 600% of the contactor rating.
Related parameters: None
Current at Stop
The soft starter has detected current at a time when no current
is expected (Ready, Not Ready or Tripped states).
Related parameters: None
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: 5A, 5B, 6C
EMX4e User Manual (710-18433-00C) |
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