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YASKAWA
TOMPC71061753A YASKAWA AC Drive GA500 Installation and Operation Instruction
The acceleration/deceleration
times or cycle times are too short.
Increase the acceleration and deceleration
times.
The setting of the motor rated
current is incorrect.
Make sure that the rated current set in
E2-01
[Motor Rated Current (FLA)]
is correct.
oL2
Drive Overload
•
The load is too large.
•
The drive capacity is too small.
•
The torque is too large at low
speed.
•
Examine the load.
•
Make sure that the drive is large enough
for the load.
•
The overload capability of the drive
decreases at low speeds. Decrease the
load or replace the drive with a larger
capacity drive.
ov
Overvoltage
•
The power supply voltage is
too high.
•
The deceleration time is too
short.
•
The stall prevention function is
disabled.
•
The braking resistor is not
connected or is broken.
•
Motor control is not stable.
•
The input voltage is too high.
•
Increase the deceleration time.
•
Set
L3-04 ≠ 0 [Stall Prevention during
Decel ≠ Disabled]
to enable stall
prevention.
•
Replace the braking resistor.
•
Make sure that the motor parameter
settings are correct, and adjust the torque
and slip compensation if necessary.
•
Make sure that the supply voltage is
correct for the drive specifications.
PF
Input Phase Loss
There is a phase loss in the drive
input power.
Correct all wiring errors with the main
circuit power supply.
Loose wiring in the input power
terminals.
Tighten the screws to the correct tightening
torque.
The drive input power voltage is
changing too much.
•
Examine the supply voltage for
problems.
•
Make the drive input power stable.
Unsatisfactory balance between
voltage phases.
•
Examine the supply voltage for
problems.
•
Make the drive input power stable.
•
If the supply voltage is good, examine
the magnetic contactor on the main
circuit side for problems.
The main circuit capacitors have
become unserviceable.
•
Examine the capacitor maintenance time
in monitor
U4-05
[CapacitorMaintenance]
.
•
If
U4-05
is more than 90%, replace the
capacitor. Contact Yaskawa or your
nearest sales representative for more
information.
•
Examine the supply voltage for
problems.
•
Re-energize the drive.
•
If the alarm stays, replace the circuit
board or the drive. For information about
replacing the control board, contact
Yaskawa or your nearest sales
representative.
STo
Safe Torque OFF
Safe Disable inputs H1-HC and
H2-HC are open.
•
Make sure that the Safe Disable signal is
input from an external source to terminal
H1-HC and H2-HC.
•
When the Safe Disable function is not in
use, connect terminals H1-HC and H2-
HC.
