Failure To Observe This Caution May Result In Personal Injury; Motor Faults And Corrective Actions - YASKAWA CIMR-SSA Series Instruction Manual

7.2

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 YASKAWA
representative immediately.
Table 32
Fault
Motor does not rotate. Fault displayed in digital operator display?
Motor rotation
reverses. reverses
Motor rotates, but
variable speed not variable speed not
available.
Motor speed too high
or too low. or too low.
Motor speed not M
stable during
operation. operation.
Motor does not rotate
when the power sup-
ply is turned ON with
the operation com-
mand entered.
Motor Faults and Corrective Actions
Check Point
Power supply voltage applied to power supply
terminals R, S, T?
Use rectifier type voltmeter to test. Voltage
output to output terminals U, V, W correct?
Motor locks due to excessive load?
FWD or REV run command entered? (only for
REMOTE operation)
Speed setting voltage entered?
(Only for REMOTE operation)
Speed reference selection (b1-01), run com-
mand selection (b1-02) correct?
Wiring of terminals U, V, W correct?
FWD and REV run signal wirings correct?
Wiring of speed setting circuit correct?
Load excessively large?
Motor ratings (number of poles, voltage)
correct?
Accel/decel speed change ratio for gears, etc.
correct?
Torque reference saturated?
Maximum speed set value correct?
Load excessively large?
d
Load variation excessively large?
Power supply open-phase?
After switching between LOCAL/REMOTE,
the setting of (b1-06) correct?
7 TROUBLESHOOTING
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 Table 29.
Check the wiring.
⋅Correct the wiring.
⋅Check speed setting voltage.
Input the correct set value.
Match wiring to the phase order of the motor
leads U, V, W.
Correct the wiring.
Correct the control circuit wiring.
Reduce the load.
Check motor nameplate specifications.
Check speed changer (gears, etc.)
Check the settings of U1-09 and L7-01 to L7-04.
Check the maximum speed set value (E1-06).
Reduce the load.
⋅Reduce the load variation.
⋅Increase inverter and motor capacity.
Check the wiring.
Set b1-06=1.
71