TROUBLESHOOTING
Possible cause/Suggested solution
Low Control Volts
The EMX3 has detected a drop in the internal control voltage.
• Check the external control supply (A1, A2, A3) and reset the starter.
If the external control supply is stable:
• the 24 V supply on the main control PCB may be faulty; or
•
the bypass driver PCB may be faulty (internally bypassed models only). Contact your local supplier
for advice.
This protection is not active in Ready state.
Related parameters: 16X
Low Level
This is a name selected for a programmable input. Refer to Input A trip.
Low Pressure
This is a name selected for a programmable input. Refer to Input A trip.
Motor Connection Tx
The motor is not connected correctly to the soft starter.
• Check individual motor connections to the soft starter for power circuit continuity.
• Check connections at the motor terminal box.
This trip is not adjustable.
Related parameters: None
Motor overload
Motor 2 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: 1A, 1B, 9B, 9C, 2A, 2D, 10A, 10D, 16A
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 a valid motor thermistor is no longer used, a 1.2 kΩ resistor must be fitted across
terminals B4, B5.
Related parameters: 16I
Network
communication
(between device and
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: 16K
No Flow
This is a name selected for a programmable input. Refer to Input A trip.
Parameter out of
range
• A parameter value is outside the valid range.
The starter will load the default value for all affected parameters. Press
to go to the first
invalid parameter and adjust the setting.
Related parameters: None
Phase sequence
The phase sequence on the soft starter's input terminals (L1, L2, L3) is not valid.
Check the phase sequence on L1, L2, L3 and ensure the setting in parameter 4G is suitable for the
installation.
Related parameters: 4G
PLC
This is a name selected for a programmable input. Refer to Input A trip.
Power loss
The starter is not receiving mains supply on one or more phases when a Start Command is given.
Check that the main contactor closes when a start command is given, and remains closed until the end
of a soft stop. Check the fuses. If testing the soft starter wi
th a small motor, it must draw at least 2% of
its minimum FLC setting on each phase.
Related parameters: None
Pump Fault
This is a name selected for a programmable input. Refer to Input A trip.
User Manual (710-04840-00M) | 73
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