Section 10
Troubleshooting
20413005
8-2012/Rev 05
10-13
Table 10-2
Softstarter Troubleshooting Guide
2.
Motor stops inadvertently
and fails to start
LED off Check control power
connections and the power
source to the softstarter.
LED on Check isolation contactor for
proper closure.
Check presence of line power.
LED flashing one time;
overload
Reset overload.
LED flashing two times; over
temperature
Allow time for unit to cool.
LED flashing four times;
phase loss/open load
Check line and load connections
to the softstarter, contactors and
motor.
Confirm that 3-phase is present.
LED flashing five times;
phase imbalance
Check the line current present in
each phase.
The unit will trip if imbalance is
>50%.
Note: The LED flashing seven times indicates the softstarter is performing a self-test.
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