Rockwell Automation 150 SMC-Flex User Manual - Manual (Page 123)

Troubleshooting 9-5
Table 9.D Motor Stops While Running
Table 9.E Miscellaneous Situations
Starting • Mechanical problems
• Inadequate Current
Limit setting
• Failed control module
• Check for binding or
external loading and
correct
• Check motor
• Adjust the Current Limit
Level to a higher setting
• Replace control module
Display Possible Cause Possible Solutions
Fault displayed • See fault description • See Table 10.A
addressing fault
conditions
Display is blank • Control voltage is
absent
• Failed control module
• Check control wiring and
correct if necessary
• Replace control module
Stopped
0.0 Amps
• Pilot devices
• Failed control module
• Check control wiring and
correct if necessary
• Replace control module
Starting • Two or three power
phases are missing
• Failed control module
• Check power system
• Replace control module
Situation Possible Cause Possible Solutions
Motor current and
voltage fluctuates
with steady load • Motor
• Erratic Load
• Verify type of motor as a standard
squirrel cage induction motor
• Check load conditions
Erratic operation • Loose
connections • Shut off all power to controller and
check for loose connections
Accelerates too fast • Starting time
• Initial torque
• Current limit
setting
• Kickstart
• Increase starting time
• Lower initial torque setting
• Decrease current limit setting
• Lower kickstart time or turn off
Accelerates too
slow • Starting time
• Initial torque
• Current limit
setting
• Kickstart
• Decrease starting time
• Increase initial torque setting
• Increase current limit setting
• Increase kickstart time or turn off
Fan does not
operate • Wiring
• Failed fan(s)
• Check wiring and correct if
necessary
• Replace fan module
Motor stops too
quickly with
Soft Stop option • Time setting • Verify the programmed stopping
time and correct if necessary