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12 Troubleshooting
AC Servomotors/Servo Drives 1S-series with Built-in EtherCAT® Communications User’s Manual (I586)
12-5 Troubleshooting
12
12-5-1 Troubleshooting Using Error Displays
A3 00 Fan Rotation
Warning
The rotation speed of
the fan is 80% or less of
the rating and the cool-
ing performance
decreases.
There is a foreign mat-
ter in the cooling fan
and it blocks the rota-
tion.
Check whether there is a foreign
matter in the fan. If you find a for-
eign matter, remove it.
Cooling fan failure If there is no improvement after you
performed the correction above,
replace the Servo Drive.
A4 00 Encoder
Communica-
tions Warning
Encoder communica-
tions errors occurred in
series more frequently
than the specified value.
This warning is detected
if encoder communica-
tion fails twice in a row
due to events such as a
timeout or data error.
Noise into the encoder
cable
• Separate the motor cable and the
encoder cable if they are bundled
together.
• Connect the shield to FG.
• Check that the motor ground wire
is connected to FG.
Contact failure of the
encoder cable
Check whether the connector is dis-
connected. Connect the connector
firmly if it is disconnected or loose.
Check that the encoder cable is not
broken. Replace the encoder cable
if it is broken.
Power supply undervolt-
age to the encoder
Use the recommended encoder
cable.
A6 00 Motor Vibra-
tion Warning
The motor vibration,
which was higher than
or equal to the level set
in the Vibration Detec-
tion - Detection Level
(3B70-01 hex), was
detected.
The control parameter is
set inappropriately.
Set the control parameters such as
inertia ratio, gain, and filter to
appropriate values by gain tuning or
manually.
The rigidity decreased
due to mechanical
looseness or wear.
Check whether the mechanical sys-
tem is not loose and secure it firmly.
If the rigidity of mechanical system
is changed, adjust the control
parameter again.
Error No.
Name Cause Measures
Main
(hex)
Sub
(hex)
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