Rockwell-automation 1560E SMC Flex Smart Motor Controller Manual de usuario descargar pdf (Pagina 123)

Troubleshooting 9-5

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Table 9.D – Motor Stops While Running

Display Possible Causes Possible Solutions

Fault displayed • See fault description • See Table 9.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

• Check voltage sensing module and connections

• Replace control module

Table 9.E – MiscellaneousSituations

Display Possible Causes Possible Solutions

Motor current and

voltage fluctuates with

steady load

• Motor

• Erratic Load

• Verity 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

Acceleratestoo fast • Startingtime

• Initial torque

• Current limit setting

•Kickstart

• Increase starting time

• Lower initial torque setting

• Decrease current limit setting

• Lower kickstart time or turn off

Acceleratestoo slow • Startingtime

• 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 fans(s)

• Check wiring and correct if necessary

• Replace fan(s)

Motor stops too quickly

withSoftStopoption

• Time setting • Verify the programmed stopping time and correct if

necessary

Motor stops too slowly

withSoftStopoption

• Stopping time setting

• Misapplication

• Verify the programmed stopping time and correct if

necessary

• The Soft Stop option is intended to extend the stopping time

for loads that stop suddenly when power is removed from

the motor.

Fluid surges with

pumps still occur with

the Soft Stop option

• Misapplication • Soft Stop ramps voltage down over a set period of time. In

the case of pumps, the voltage may drop too rapidly to

prevent surges. A closed loop system such as Pump Control

would be more appropriately suited.

• Refer to Publication 150-911

Motor overheats • Overload

• Blocked ventilation

•Dutycycle

• Allow motorto cool and reduce load.

• Remove blockage and ensure motor is being adequately

cooled.

• Preset Slow Speed and Accu-Stop options: Extended

operation at slow speeds reduces motor cooling efficiency.

Consult motor manufacturer for motor limitations.

• Smart Motor Braking option: Check duty cycle. Consult

motor manufacturer for motor limitations.

Motor short circuit • Winding fault • Identify fault and correct

• Check forshorted SCR; replace if necessary

• Ensure power terminals are secure

NOTE: For Pump Stop issues, please refer to “Pump Application Considerations” on page 1-20.

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