Filter
Top Products
10 - 5
10. TROUBLESHOOTING
Display Name Definition
Cause
Action
A24 Main circuit
error
Ground fault
occurred at the servo
motor power (U,V
and W phases) of
the servo amplifier.
1. Power input wires and servo motor
power wires are in contact.
Connect correctly.
2. Sheathes of servo motor power
cables deteriorated, resulting in
ground fault.
Change the cable.
3. Main circuit of servo amplifier failed.
Checking method
Alarm (A24) occurs if the servo is
switched on after disconnecting
the U, V, W power cables from
the servo amplifier.
Change the servo amplifier.
A25 Absolute
position erase
Absolute position
data in error
1. Voltage drop in encoder.
(Battery disconnected.)
After leaving the alarm occurring for a few
minutes, switch power off, then on again.
Always make home position setting again.
2. Battery voltage low. Change the battery.
Always make home position setting again.
3. Battery cable or battery is faulty.
Power was switched
on for the first time in
the absolute position
detection system.
4. Home position not set.. After leaving the alarm occurring for a few
minutes, switch power off, then on again.
Always make home position setting again.
A30 Regenerative
error
Permissible
regenerative power
of the built-in
regenerative resistor
or regenerative
option is exceeded.
1. Wrong setting of parameter No.
PA02.
Set correctly.
2. Built-in regenerative resistor or
regenerative option is not
connected.
Connect correctly.
3. High-duty operation or continuous
regenerative operation caused the
permissible regenerative power of
the regenerative option to be
exceeded.
Checking method
Call the status display and check
the regenerative load ratio.
1. Reduce the frequency of positioning.
2. Use the regenerative option of larger
capacity.
3. Reduce the load.
4. Power supply voltage is abnormal.
MR-J3-
T:260VAC or more
MR-J3-
T1:More than 135VAC
MR-J3-
T4: 535VAC or more
Check the power supply.
5. Built-in regenerative resistor or
regenerative option faulty.
Change the servo amplifier or regenerative
option.
Regenerative
transistor fault
6. Regenerative transistor faulty.
Checking method
1) The regenerative option has
overheated abnormally.
2) The alarm occurs even after
removal of the built-in
regenerative resistor or
regenerative option.
Change the servo amplifier.