Fault screen with RESET button
Troubleshooting using the fault display on the soft starter
If the displayed message does not correspond to any of the following or if you have any other problem, please contact your
The possible fault messages that the soft starter may display, are listed in the table below together with a detailed
description of the fault and corrective actions.
If you need assistance with troubleshooting, it will be helpful if you can attach a photo of the screen with the fault message.
Motor Protection Curve Trip
Applicable during STARTING
Applicable during STARTING.
102 Protective functions
Figure 61 – MEsoftstart/I Pro TFT display Fault screen
This trip may occur during Starting or Running
and is time related to the protection curves,
depending on which curve and by what
proportion of the Motor Full Load Current, the
motor is drawing.
An over current was detected during start-up.
This trip occurs when the "Maximum Starting
Current" is exceeded during the start ramp.
This limit is defined by parameter "Overload
.protection class" as described in paragraph
Revolutions per Minute (Motor Shaft Speed)
Grid voltage imbalance%
Motor side voltage imbalance%
Switching card inhibit relay status
Shunt Trip relay status
Remote start signal
External Reset signal
Run Relay output signal (True while soft starter is Starting,
Running and Stopping the motor)
Ready Relay output signal (True if ready to start the motor)
Fan Relay output signal – this is just an indication that the
fan is switched on or off. Check that the fan is blowing when
this signal is active.
Line voltage on phase 1
Line voltage on phase 2
Line voltage on phase 3
Motor side voltage on phase 1
Motor side voltage on phase 2
Motor side voltage on phase 3
An indication of the percentage of switch pulses on the
Line voltage frequency
Phase rotation (Clockwise, anti-clockwise or undefined)
Heat sink #1 temperature
Heat sink #2 temperature
Heat sink #3 temperature
Ambient temperature inside the soft starter
If the motor allows, select a more lenient
trip curve (Protection Class). (Refer
Check the motor current specification
and confirm that the "Maximum Starting
Current" (refer 6.4.4) is set to an
appropriate value in relation to the
"Ramp-up time" (refer 6.4.1).
Also confirm that the "Maximum Ramp-
up time" is at least twice the length of
the time set for "Ramp-up time".