SEM 800-1000 Series, Operation And Maintenance Manual

Page: 27 / 35

Troubleshooting (continued)
PROBLEM POSSIBLE CAUSE SOLUTION
OVERLOAD TRIPPING
LOW VOLTAGE CHECK VOLTAGE
CURRENT RELAY IS SET TOO
HIGH
CONSULT FACTORY
MOTOR OVERHEATING
CHECK MOTOR COOLING FAN
FOR OBJECT OBSTRUCTING AIR
FLOW
OVERLOAD TRIPPING
(CONTINUED)
DIRTY OR UNLUBRICATED
CUTTER HEAD
CLEAN AND LUBE
DEFECTIVE MOTOR
CONDUCT AMPERAGE TEST.
CONSULT FACTORY FOR
REPLACEMENT MOTOR
MACHINE WILL NOT RUN
IN FORWARD BUT WILL
RUN IN REVERSE
DEFECTIVE FORWARD
BUTTON
CHECK CONTACT BLOCK FOR
CONTINUITY. IF BAD, REPLACE
DISCONNECTED WIRE ON
FORWARD BUTTON
CHECK AND RE-CONNECT
DISCONNECTED WIRE ON
CURRENT RELAY
CHECK AND RE-CONNECT
CURRENT REALLY STUCK
OPEN
CLEAN RELAY. FREE CENTER
SPOOL. CHECK CONTINUITY. IF
BAD, CONSULT FACTORY FOR
REPLACEMENT RELAY.
MACHINE WILL NOT RUN
IN REVERSE BUT WILL RUN
IN FORWARD
DEFECTIVE REVERSE BUTTON
CHECK FOR CONTINUITY. IF
BAD, REPLACE
DISCONNECT WIRE ON
REVERSE BUTTON
CHECK AND RE-CONNECT
DEFECTIVE COIL IN REVERSE
SIDE OF CONTACTOR
CONSULT FACTORY FOR
REPLACEMENT COIL
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