Troubleshooting; Protection Responses; Trip Messages - AuCom MVE Series User Manual

11. Troubleshooting

The MVE provides extensive information to help the operator diagnose and remedy any operating difficulties.
In addition to the motor and load protection features already described, the MVE reports in detail on the starter's own
state. Any internal failure will cause the soft starter to trip, and full details will be recorded in the Trip Log and Event
Log.

11.1 Protection Responses

When a protection condition is detected, the MVE 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 16).
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 MVE 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 controller or activate the Reset remote input.
If the MVE has issued a warning, the soft starter will reset itself once the cause of the warning has been resolved.
Summary of soft starter responses to protection events
Protection response
setting
Trip Starter
Warn and Log
Log Only

11.2 Trip Messages

This table lists soft starter's protection mechanisms and the probable cause of the trip. Some of these can be
adjusted using parameter group 3 Protection Settings and parameter group 16 Protection Action, other settings are
built-in system protections and cannot be set or adjusted.
Display
Battery/clock
Bypass fail
Controller
Response actions
LED "Trip" Trip relay output
7A, 7D, 7G = 'Trip')
On
Flashing
Off
Possible cause/Suggested solution
A verification error has occurred on the real-time clock, or the backup battery voltage is
low. If the battery is low and the power is off, date/time settings will be lost. The MVE will
continue to soft start and soft stop correctly. Reprogram the date and time.
The battery is not removable. In order to replace the battery, the main control PCB must be
replaced.
Related parameters: 16M
The bypass contactor has welded closed or is not operating correctly. There may be a
problem with the control circuit or the contactor coil.
Check the condition of the bypass contactor's main poles. Check the operation of the
contactor control circuitry and contactor coil.
This trip is not adjustable.
NOTE
You can use the Run Simulation to check the bypass contactor's operation
without mains voltage connected.
This is a name selected for a programmable input. Refer to Input A trip.
Write to event log
(parameters
Yes
No
No
TROUBLESHOOTING
Write to trip log
Yes Yes
Yes No
Yes No
MVE User Manual (710-17074-00H) |
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