K-TRON KCM - DC Motor Drive Problems and Solutions

10 Troubleshooting
10.4DC motor drive problems and solutions
Page 86 Docu-No.: 1090020601-EN Rev. 1.2.1
10.4 DC motor drive problems and solutions
Note
• Before you change one of the programming variables, check the
parameter against standards.
Problem Possible Cause Remedy
Motor does not start. • No setpoint from KCM.
• Safety switch is active.
• Motor cable has been disconnected.
• Failed motor.
 Enter setpoint at operating unit.
 Check safety switch on the feeder
or its connection at KCM.
 Check motor cables.
 Replace motor.
 Check for alarms that might stop
the machine.
 Check display status for <Wait>,
<Disa>, <Alsh>.
 Check that KCM has power.
Motor runs at
maximum speed.
• Speed sensor has failed.
• If scale interface pc board (SIB) is
used, the SIB has failed.
• Setpoint is too high.
 Check signal, replace sensor.
 Check signal, if pick-up is OK, and
SIB is used, replace SIB.
 If signals are OK, replace KCM.
 Reduce setpoint.
Motor does not
achieve desired
speed.
• Incorrect motor power setting.
• Incorrect gear teeth setting.
 Check programming.
Alv LED is <Off> • No AC power to drive
• Drive has failed
 Check input power for proper
connections.
 Replace drive.