YASKAWA Sigma-7 Series Product Manual page 106

6.1 Alarm Displays
6.1.2 Troubleshooting Alarms
Alarm Number:
Alarm Name
A.7A2:
Internal Tempera-
ture Error 2
(Power Board
Temperature
Error)
A.7A3:
Internal Tempera-
ture Sensor Error
(An error
occurred in the
temperature sen-
sor circuit.)
A.7Ab:
SERVOPACK
Built-in Fan
Stopped
A.810:
Encoder Backup
Alarm
(Detected at the
encoder, but only
when an abso-
lute encoder is
used.)
6-18
Possible Cause
Check the surrounding
air temperature using a
The surrounding air thermometer. Or, check
temperature is too the operating status
high. with the SERVOPACK
installation environment
monitor.
An overload alarm
Check the alarm display
was reset by turning
to see if there is an
OFF the power sup-
overload alarm.
ply too many times.
Use the accumulated
There was an exces-
load ratio to check the
sive load or operation
load during operation,
was performed that
and use the regenera-
exceeded the regen-
tive load ratio to check
erative processing
the regenerative pro-
capacity.
cessing capacity.
The SERVOPACK
installation orientation
is not correct or there Check the SERVOPACK
is insufficient space installation conditions.
around the SERVO-
PACK.
A failure occurred in
–
the SERVOPACK.
A failure occurred in
–
the SERVOPACK.
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.
Confirmation
Decrease the surround-
ing temperature by
improving the SERVO-
PACK installation condi-
tions.
Change the method for
resetting the alarm.
Reconsider the load and
operating conditions.
Install the SERVOPACK
according to specifica-
tions.
The SERVOPACK may be
faulty. Replace the
SERVOPACK.
The SERVOPACK may be
faulty. Replace the
SERVOPACK.
Remove foreign matter
from the SERVOPACK. If
the alarm still occurs, the
SERVOPACK may be
faulty. Replace the
SERVOPACK.
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
SERVOPACK.
Continued from previous page.
Correction Reference
*1
–
–
*1
–
–
–
*1
–
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Continued on next page.