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TROUBLESHOOTING
112
EMX4i User Manual 710-14888-00C
11.
Troubleshooting
11.1
Protection Responses
When a protection condition is detected, the EMX4i 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 EMX4i 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 EMX4i has issued a warning, the soft starter will reset itself once the cause of
the warning has been resolved.
11.2
Trip Messages
Display
Possible cause/Suggested solution
2 Phase - Damaged
SCR
This message is displayed if the soft starter tripped on “Lx-Tx
shorted” during the pre-start checks and PowerThrough is
enabled. It indicates that the starter now operates in
PowerThough mode (2-phase control only).
Check for either a shorted SCR or a short within the bypass
contactor.
Related parameters: 6S
Battery/clock
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 EMX4i 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: 6T
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
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