YASKAWA SGD7S - Page 506

12.2 Alarm Displays
12.2.2 Troubleshooting Alarms
12-37
12
Maintenance
A.E72:
Feedback Option
Module Detec-
tion Failure
There is a faulty con-
nection between the
SERVOPACK and the
Feedback Option
Module.
Check the connection
between the SERVO-
PACK and the Feed-
back Option Module.
Correctly connect the
Feedback Option Module.
–
The Feedback Option
Module was discon-
nected.
–
Reset the Option Module
configuration error and
turn the power supply to
the SERVOPACK OFF and
ON again.
page 12-43
A failure occurred in
the Feedback Option
Module.
–
Replace the Feedback
Option Module.
–
A failure occurred in
the SERVOPACK.
–
Replace the SERVO-
PACK.
–
A.E74:
Unsupported
Safety Option
Module
A failure occurred in
the Safety Option
Module.
–
Replace the Safety Option
Module.
–
An unsupported
Safety Option Module
was connected.
Refer to the catalog of
the connected Safety
Option Module.
Connect a compatible
Safety Option Module.
–
A.Eb1:
Safety Function
Signal Input Tim-
ing Error
The delay between
activation of the
/HWBB1 and
/HWBB2 input sig-
nals for the HWBB
was ten second or
longer.
Measure the time delay
between the /HWBB1
and /HWBB2 signals.
The output signal circuits
or devices for /HWBB1
and /HWBB2 or the
SERVOPACK input signal
circuits may be faulty.
Alternatively, the input sig-
nal cables may be discon-
nected. Check to see if
any of these items are
faulty or have been dis-
connected.
–
A failure occurred in
the SERVOPACK.
–
Replace the SERVO-
PACK.
–
A.EC8:
Gate Drive Error 1
(An error
occurred in the
gate drive circuit.)
A failure occurred in
the SERVOPACK.
–
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the SERVOPACK
may be faulty. Replace the
SERVOPACK.
–
A.EC9:
Gate Drive Error 2
(An error
occurred in the
gate drive circuit.)
Continued on next page.
Continued from previous page.
Alarm Number:
Alarm Name
Possible Cause Confirmation Correction Reference