User`s manual

92 FP5/GP5 User’s Manual
Motor Faults
If a motor fault occurs, follow the checkpoints listed in the table below and
take the corresponding corrective actions. If taking the corrective actions
described does not solve the problem, contact your Saftronics representative
immediately.
Motor Faults and Corrective Actions
Fault Check Point Corrective Action
Motor does not
rotate
Power supply voltage applied to power supply
terminals L1, L2, L3? Charge LED is ON?
·Turn ON power supply.
·Turn OFF power supply, and then ON
again.
·Check power supply voltage.
·Make sure terminal screws are tight.
Use rectifier type voltmeter to test. Voltage
output to output terminals T1, T2, T3 correct?
Turn OFF power supply, then turn ON
again.
Motor locks due to excessive load? Reduce the load and release the lock.
Fault displayed in operator display? Check troubleshooting table.
FWD or REV run command entered? Check the wiring.
Frequency setting voltage entered?
·Check the wiring.
·Check frequency setting voltage.
Operation mode setting correct?
Check the operation mode selection
(n002).
Motor rotation
reverses
Wiring of terminals T1, T2, T3 correct?
Match wiring to the phase order of the
motor leads U, V, W.
FWD and REV wiring run signals entered? Correct the wiring.
Motor rotates, but
variable speed not
available.
Wiring of frequency setting circuit correct?
Check the operation mode selection
(n002).
Operation mode setting correct?
Check the operation mode selection
(n002).
Load excessively large? Reduce the load.
Motor r/min. too high
or too low
Motor ratings (number of poles, voltage
correct?)
Check motor nameplate specifications.
Accel/decel speed change ratio for gears, etc.
correct?
Check speed changer (gears, etc.)
Maximum frequency set value correct? Check the maximum frequency set value.
Use rectifier voltmeter. Voltage between
motor terminals not excessive/reduced?
Check V/f characteristics values.
Motor r/min not
stable during
operation
Load excessively large? Reduce the load.
Load variation excessively large?
·Reduce the load variation.
·Increase inverter motor capacity.
3-phase or single-phase power supply used?
For 3-phase power supply, open phase?
·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.
Appendix
Contents
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