5.3 Troubleshooting Alarms
5
Maintenance
5-19
A.7Ab:
SERVOPACK
Built-in Fan
Stopped
The fan inside the
SERVOPACK
stopped.
Check for foreign matter
inside the SERVOPACK.
Remove foreign matter
from the SERVOPACK. If
an alarm still occurs, the
SERVOPACK may be
faulty. Replace the SER-
VOPACK.
–
A.810:
Encoder Backup
Alarm
(Detected at the
encoder, but only
when an abso-
lute encoder is
used.)
The power to the
absolute encoder was
turned ON for the first
time.
Check to see if the
power supply was
turned ON for the first
time.
Set up the encoder.
*1
The Encoder Cable
was disconnected
and then connected
again.
Check to see if the
power supply was
turned ON for the first
time.
Check the encoder con-
nection and set up the
encoder.
Power is not being
supplied both from
the control power
supply (+5 V) from the
SERVOPACK and
from the battery
power supply.
Check the encoder
connector battery and
the connector status.
Replace the battery or
implement similar mea-
sures to supply power to
the encoder, and set up
the encoder.
A failure occurred in
the absolute encoder.
–
If the alarm still occurs
after setting up the
encoder again, replace
the Servomotor.
–
A failure occurred in
the SERVOPACK.
–
The SERVOPACK may be
faulty. Replace the SER-
VOPACK.
–
A.820:
Encoder Check-
sum Alarm
(Detected at the
encoder.)
A failure occurred in
the encoder.
–
When Using an Abso-
lute Encoder
Set up the encoder again.
If the alarm still occurs,
the Servomotor may be
faulty. Replace the Servo-
motor.
When Using a Single-
turn Absolute Encoder
or Incremental Encoder
The Servomotor may be
faulty. Replace the Servo-
motor.
*1
A failure occurred in
the SERVOPACK.
–
The SERVOPACK may be
faulty. Replace the SER-
VOPACK.
–
A.830:
Encoder Battery
Alarm
(The absolute
encoder battery
voltage was lower
than the speci-
fied level.)
The battery connec-
tion is faulty or a bat-
tery is not connected.
Check the battery con-
nection.
Correct the battery con-
nection.
*1
The battery voltage is
lower than the speci-
fied value (2.7 V).
Measure the battery
voltage.
Replace the battery.
*1
A failure occurred in
the SERVOPACK.
–
The SERVOPACK may be
faulty. Replace the SER-
VOPACK.
–
Continued on next page.
Continued from previous page.
Alarm Number:
Alarm Name
Possible Cause
Confirmation
Correction
Reference
