Motor Faults And Corrective Actions - Saftronics FP5/GP5 Series Technical Manual

efesotomasyon.com - Control Techniques,emerson,saftronics -ac drive-servo motor
Chapter 8: Troubleshooting
8.3

Motor Faults and Corrective Actions

§
If any of the following faults occurs in the motor, check the cause and provide the relevant corrective action.
§
If these inspections and corrective actions cannot solve the problem, contact your Saftronics representative immediately.
Fault
Motor does not rotate.
Motor rotation reverses.
Motor rotates, but variable
speed not available.
Motor RPM too high or too low.
Motor RPM not stable during
operation.
Firmware – S2011 and S3012
Revision: 1 (9/98)
Table 22 Motor Faults and Corrective Actions
Check Point
Power supply voltage applied to power
supply Terminals L1, L2, and L3 (R, S, and
T)? Is CHARGED LED ON?
Use rectifier type voltmeter to test. Is
voltage output to output Terminals T1, T2
and T3 (U, V, and W) correct?
Motor locks due to excessive load?
Fault displayed in Digital Operator display?
FWD or REV RUN command entered?
Frequency setting voltage entered?
Operation mode setting (n002) correct?
Wiring of Terminals T1, T2, and T3 (U, V,
and W) correct?
FWD and REV wiring run signals entered?
Wiring of frequency setting circuit correct?
Operation mode setting (n002) correct?
Load excessively large?
Motor ratings (number of poles, voltage)
correct?
Accel/decel speed change ratio for gears,
etc. correct?
Maximum frequency set value correct?
Use rectifier voltmeter. Voltage between
motor terminals not excessively reduced?
Load excessively large?
Load variation excessively large?
3-phase or single-phase power supply
used? For 3-phase power supply, open
phase?
70
Corrective Action
•
Turn ON power supply.
•
Turn OFF power supply, and then ON
again.
•
Check power supply voltage.
•
Make sure terminal screws are tight.
Turn OFF power supply, then turn ON again.
Reduce the load and release the lock.
Check troubleshooting table.
Check the wiring.
•
Correct the wiring.
•
Check frequency setting voltage.
Input the correct the set value.
Match wiring to the phase order of the motor
leads T1, T2, and T3 (U, V, and W).
Correct the wiring.
Correct the wiring.
With the Digital Operator, check the operation
mode selection.
Reduce the load.
Check motor nameplate specifications.
Check speed changer (gears, etc.).
Check the maximum frequency set value.
Check V/f characteristics values.
Reduce the load.
•
Reduce the load variation.
•
Increase Inverter motor capacity.
For 3-phase power supply, check the wiring if
power supply is open phase.
For single-phase power supply connect AC
reactor to the power supply.
© Saftronics, Inc.