TROUBLESHOOTING
710-14888-00C EMX4i User Manual 117
Possible cause/Suggested solution
Motor overload
The motor has reached its maximum thermal capacity.
Overload can be caused by:
• The soft starter protection settings not matching the motor
thermal capacity
• Excessive starts per hour or start duration
• Excessive current
• Damage to the motor windings
Resolve the cause of the overload and allow the motor to cool.
Related parameters: 1B, 1D, 1E, 1F, 5O, 6J
Parameters 1D, 1E and 1F determine the trip current for
motor overload protection. The default settings of
parameters 1D, 1E and 1F provide Motor Overload
Protection: Class 10, Trip Current 105% of FLA (full load
amperage) or equivalent.
Motor thermistor
The motor thermistor input has been enabled and:
• The resistance at the thermistor input has exceeded 3.6 kΩ for
more than one second.
• The motor winding has overheated. Identify the cause of the
overheating and allow the motor to cool before restarting.
• The motor thermistor input has been opened.
If thermistors have previously been connected to the EMX4i but
are no longer required, use the Thermistor Reset function to
disable the thermistor.
Related parameters: 6Q
Network
communication
There is a network communication problem, or the network
master may have sent a trip command to the starter. Check the
network for causes of communication inactivity.
Related parameters: 6M
Not ready
• The reset input may be active. If the reset input is active, the
starter will not operate.
• The soft starter may be waiting for the restart delay to elapse.
The length of the restart delay is controlled by parameter 5P
Restart Delay
.
Related parameters: 5P
To Next Page
Loading...
