Omron SYSDRIVE 3G3XV-EV2 Series Operation Manual page 73

Correcting Motor Faults
Protection function
Low-voltage protection
(main circuit voltage
insufficient)
Overtorque detection
Stall pre-
During
vention accelera-
(Accel/decel tion
is accom-
plished with
maximum
capacity of
the Inverter the Inverter
During nor-
without trip-
mal opera-
ping on
tion
overcurrent
or overvol-
tage.)
During
decelera-
tion
Simultaneous forward
and reverse rotation com-
mands
External base block sig-
nal input (main circuit
transistor instantaneous
shut-off)
3-2 Correcting Motor Faults
Fault
Motor does not Power supply voltage is not supplied to
rotate.
power supply terminals L1 (R), L2 (S), and
L3 (T). (The CHARGE indicator should be
on.)
Voltage is not being output to output termi-
nals T1 (U), T2 (V), and T3 (W).
Load is too large. (Motor is locked.)
A fault is displayed.
FWD or REV run command has not been
entered.
Frequency setting signal has not been
entered.
Operation (method selection) Mode setting
is incorrect.
Motor rotating in Wiring of output terminals T1 (U), T2 (V),
wrong direction. g
and T3 (W) is incorrect.
Wiring of FWD or REV run signals is incor-
rect.
Error causes
Input voltage drop
Motor current exceeded the set value
because of machine fault or overload.
Insufficient power for accel/decel
Overload
Phase loss
Operation sequence error
3-wire/2-wire selection error
---
The following table lists possible causes and corrective actions for
faults that might occur.
Possible Cause
Action to be taken
Check the input power supply voltage
using a tester. If the voltage is low,
adjust the input voltage.
Check the driven machine and correct
the cause of the fault or set to a higher
value.
Set proper accel/decel time for smooth
operation.
For stall prevention during normal
operation lighten the load or increase
Inverter capacity.
Recheck the control sequence.
Recheck constant settings (No. 32).
---
Corrective Action
Turn on power supply.
Turn power supply off and then on again.
Check power supply voltage.
Turn power supply off and then on again.
Reduce the load. (Release the lock.)
Correct the fault as described in 3-1 Fault
Display .
Correct the wiring.
Use the Digital Operator to check the
Operation Method Selection Mode.
Make sure that the terminals' phase order
matches the motor terminals'.
Correct the wiring.
Section 3-2
71