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5-8 Troubleshooting MN894
The control panel is intended to provide years of trouble free service with appropriate
cooling and protection from the elements. Should trouble occur, refer to the appropriate
control manual for control and motor troubleshooting information.
Reset the Circuit Breaker If the circuit breaker is tripped, it must be reset to restore power. The breaker is tripped if
the handle is in the “Tripped” position as indicated in Figure 5-5.
Before the breaker is reset, locate the source of electrical trouble.
1. Check for phase-to-phase and phase-to-ground shorts.
2. Check for loose connections at power connectors (L1, L2, L3 and Earth as well
as T1, T2, T3 and Motor Ground).
3. If all checks in steps 1 and 2 are OK, move the breaker handle all the way down
to the “Reset” position then move the handle to the “ON” position to restore
power. (In the “Reset” position, a click sound will be heard.)
4. Verify that an overcurrent condition is tripping the circuit breaker (not a shunt
trip). If the circuit breaker shunt trip was energized, the trip was caused by the
LCM soft start module shunt trip feature. Eliminate the cause of the shunt trip.
Figure 5-5 Magnetic Circuit Breaker
ON
Tripped
OFF
Reset
Handle
Rating Plug
Trip Level
Manual Trip
Shunt Trip Device
Shunt Trip Wires to
LCM soft start module