Troubleshooting The Mesoftstart/I Core Variant - Mitsubishi Electric MEsoftstart/I01 Users, Installation & Instruction Manual

Take care not to over-use the JOG functionality as the motor and the internal switching elements in the soft starter will
overheat quickly if JOG is done for prolonged periods.

Troubleshooting the MEsoftstart/I core variant

No LEDs on
When connected to three phase power the Power LED should be on, and the Phase LED should be either ON or flashing. If neither
of these two LEDs are on the following checks should be done:
i. Measure the incoming three phase supply power on the Grid-side terminals of the soft starter. If there is not supply
power on all three terminals, check the Main Circuit Breaker and contact the installer to find the problem.
ii. If the supply voltage is present on all three phases (measured on all three terminals) and the soft starter is not showing
any LEDs, please contact your distributor for support.
Flashing Phase LED
i. A flashing phase LED indicates that the phase rotation of the 3-phase supply is wrong. Switch off the main circuit breaker
and swap the incoming lines so that Line 1, Line 2, Line 3 is connected to the Power terminals in that order.
56 Basic operation – Core models
Figure 35 – MEsoftstart/I Core – JOG setup and control