YASKAWA E-7-Series SGD7S Product Manual page 447

12.2 Alarm Displays
12.2.2 Troubleshooting Alarms
Alarm Number:
Alarm Name
A.7AB:
SERVOPACK
Built-in Fan
Stopped
A.810:
Encoder Backup
Alarm (Detected
at the encoder,
but only when an
absolute encoder
is used.)
A.820:
Encoder Check-
sum Alarm
(Detected at the
encoder.)
A.830:
Encoder Battery
Alarm (The abso-
lute encoder bat-
tery voltage was
lower than the
specified level.)
12-24
Possible Cause
The fan inside the
Check for foreign matter
SERVOPACK
inside the SERVOPACK.
stopped.
The power to the Check to see if the
absolute encoder was power supply was
turned ON for the first turned ON for the first
time. time.
The Encoder Cable Check to see if the
was disconnected power supply was
and then connected turned ON for the first
again. time.
Power is not being
supplied both from
the control power Check the encoder
supply (+5 V) from the connector battery and
SERVOPACK and the connector status.
from the battery
power supply.
A failure occurred in
–
the absolute encoder.
A failure occurred in
–
the SERVOPACK.
A failure occurred in
–
the encoder.
A failure occurred in
–
the SERVOPACK.
The battery connec-
Check the battery con-
tion is faulty or a bat-
nection.
tery is not connected.
The battery voltage is
Measure the battery
lower than the speci-
voltage.
fied value (2.7 V).
A failure occurred in
–
the SERVOPACK.
Confirmation
Remove foreign matter
from the SERVOPACK.
If an alarm still occurs, the
SERVOPACK may be
faulty.
Replace the SERVO-
PACK.
Set up the encoder.
Check the encoder con-
nection and set up the
encoder.
Replace the battery or
implement similar mea-
sures to supply power to
the encoder, and set up
the encoder.
If the alarm still occurs
after setting up the
encoder again, replace
the Servomotor.
The SERVOPACK may be
faulty.
Replace the SERVO-
PACK.
 When Using an Abso-
lute Encoder
Set up the encoder again.
If the alarm still occurs,
the Servomotor may be
faulty.
Replace the Servomotor.
 When Using a Single-
turn Absolute Encoder
or Incremental Encoder
• The Servomotor may be
faulty.
Replace the Servomo-
tor.
• The linear encoder may
be faulty. Replace the
linear encoder.
The SERVOPACK may be
faulty.
Replace the SERVO-
PACK.
Correct the battery con-
nection.
Replace the battery.
The SERVOPACK may be
faulty.
Replace the SERVO-
PACK.
Continued from previous page.
Reference
Correction for Correc-
tion
–
page 5-51
–
–
page 5-51
–
page 4-20
page 12-3
–