Oriental motor A Step AZ Series, User Manual, Page: 100 / 120

Alarms
5 T
roubleshooting
100
2-4 Alarm list
Alarm
code
Number of
times LED
blinks
Alarm type Cause Remedial action How to reset
Motor
excitation *
10h 4
Excessive position
deviation
• When the motor was in a
state of current ON, the
deviation between the
command position and the
feedback position exceeded
the value set in the “Excessive
position deviation alarm”
parameter in the motor shaft.
• A load is large, or the
acceleration/deceleration
time or the acceleration/
deceleration rate is too short
against the load.
• The operating range of
positioning push-motion SD
operation was exceeded.
• Decrease the load.
• Increase the acceleration/
deceleration time or slow the
acceleration/deceleration rate.
• increase the operating current.
•
Reconsider the operation data.
Any of reset
operations Non-
excitation
20h 5 Overcurrent
The motor, the cable, and the
driver output circuit were
short-circuited.
Turn off the main power supply
and the control power supply first,
and check that the motor, the
cable, and the driver are not
damaged. After that, turn on the
main power supply and the
control power supply again. If the
alarm is still not reset, the motor,
the cable, or the driver may be
damaged. Contact your nearest
Oriental Motor sales office.
Turn on the
main power
supply and
control power
supply again
Non-
excitation
21h 2
Main circuit
overheat
The internal temperature of the
driver reached the upper limit
of the specification value.
Reconsider the ventilation
condition. Any of reset
operations Non-
excitation
22h 3 Overvoltage
• The main power supply
voltage exceeded the
permissible value.
• A large load inertia was
suddenly stopped.
• Vertical operation (elevating
operation) was performed.
• Check the input voltage of the
main power supply.
• Decrease the load.
• Increase the acceleration/
deceleration time or slow the
acceleration/deceleration rate.
Any of reset
operations Non-
excitation
23h 3
Main power
supply OFF The main power supply was
shut off during operation. Check if the main power supply is
properly supplied. Any of reset
operations Non-
excitation
25h 3 Undervoltage
The main power supply was
shut off momentarily or the
voltage became low.
Check the input voltage of the
main power supply. Any of reset
operations Non-
excitation
26h 8 Motor overheat
The detection temperature of
the ABZO sensor reached the
upper limit of the specification
value.
• Check the heat radiation
condition of the motor.
• Reconsider the ventilation
condition.
Any of reset
operations Non-
excitation
28h 8 Sensor error
An error of the ABZO sensor
was detected during operation.
Turn off the main power supply
and the control power supply, and
check the connection of the
motor. After that, turn on the
main power supply and the
control power supply again.
Turn on the
main power
supply and
control power
supply again
Non-
excitation