TROUBLESHOOTING
Symptom
Probable Cause
The soft starter does not
respond to commands
from the control inputs.
•
The soft starter will only accept commands from the
inputs if parameter 1A
Command Source
is set to
Digital Input. Check the setting of 1A.
•
The control wiring may be incorrect. Check that the
remote start, stop and reset inputs are configured
correctly (refer to
Start/Stop
on page 24 for details).
•
The signals to the remote inputs may be incorrect.
Test the signalling by activating each input signal in
turn.
The soft starter does not
respond to a start
command from either the
keypad or the digital
inputs.
•
The soft starter may be waiting for the restart delay
to elapse. The length of the restart delay is
controlled by parameter 5H
Restart Delay
.
•
The motor may be too hot to permit a start. The soft
starter will only permit a start when it calculates
that the motor has sufficient thermal capacity to
complete the start successfully. Wait for the motor
to cool before attempting another start.
•
The reset input may be active. If the reset input is
active, the starter will not operate.
•
The soft starter may be waiting for control signals
via the communications network (parameter 1A
Command Source
= Network).
Remote keypad shows
message "awaiting data"
The keypad is not receiving data from the control PCB.
Check the cable connection.
The soft starter does not
control the motor
correctly during starting.
•
Start performance may be unstable when using a
low
Motor Full Load Current
setting (parameter 1B).
•
Power factor correction (PFC) capacitors must be
installed on the supply side of the soft starter and
must be disconnected during starting and stopping.
To use the EMX4e to control power factor correction,
connect the PFC contactor to a programmable relay
set to Run.
•
High levels of harmonics on the mains supply can
affect soft starter performance. If variable speed
drives are installed nearby, check they are properly
grounded and filtered.
EMX4e User Manual (710-18433-00C) |
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