TROUBLESHOOTING
Symptom
Probable Cause
Motor does not reach full speed.
•
If the start current is too low, the motor will not produce enough torque to
accelerate to full speed. The soft starter may trip on excess start time.
NOTE
Make sure the motor starting parameters are appropriate for the
application and that you are using the intended motor starting profile.
If a programmable input is set to Motor Set Select, check that the
corresponding input is in the expected state.
The load may be jammed. Check the load for severe overloading or a locked rotor
situation.
Erratic motor operation.
•
The SCRs in the EMX3 require at least 5 A of current to latch. If you are testing the
soft starter on a motor with full load current less than 5 A, the SCRs may not latch
correctly.
Erratic and noisy motor operation.
•
If the soft starter is connected to the motor using inside delta configuration, the soft
starter may not be correctly detecting the connection. Contact your local supplier
for advice.
Soft stop ends too quickly.
•
The soft stop settings may not be appropriate for the motor and load. Review the
soft stop settings.
•
If the motor is very lightly loaded, soft stop will have limited effect.
Adaptive Control, brake, jog and
PowerThrough functions not working.
•
These features are only available with in-line installation. If the EMX3 is installed
inside delta, these features will not operate.
After selecting Adaptive Control the motor
used an ordinary start and/or the second
start was different to the first.
•
The first Adaptive Control start is actually 'Constant Current' so that the starter can
learn from the motor characteristics. Subsequent starts use Adaptive Control.
PowerThrough does not operate when
selected.
•
The starter will trip on Lx-Tx Shorted on the first start attempt after control power is
applied. PowerThrough will not operate if control power is cycled between starts.
Starter "awaiting data"
•
The keypad is not receiving data from the control PCB. Check the cable connection
and the fitting of the display on the starter.
Corrupted text shown on keypad display.
•
The keypad may not be screwed down, resulting in an intermittent connection.
Screw down the keypad or hold squarely in place.
Display is distorted
•
Check that the keypad has not been screwed down too tightly. Loosen screws
slightly.
Parameter settings cannot be stored.
•
Make sure you are saving the new value by pressing the STORE button after
adjusting a parameter setting. If you press EXIT, the change will not be saved.
•
Check that the adjustment lock (parameter 15B) is set to
Read & Write
. If the
adjustment lock is set to
Read Only
, settings can be viewed but not changed. You
need to know the security access code to change the adjustment lock setting.
•
The EEPROM may be faulty on the keypad. A faulty EEPROM will also trip the soft
starter, and the keypad will display the message Parameter out of range. Contact
your local supplier for advice.
ATTENTION! Remove Mains Volts
•
The soft starter will not activate Run Simulation with three-phase power connected.
This prevents unintentional direct on-line (DOL) start.
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| User Manual (710-04840-00M)
Содержание EMX3-0023B
Страница 1: ...EMX3 Soft Starter USER MANUAL ...
