YASKAWA E-7S SERVOPACK SGD7S

15.2 Alarm Displays
15.2.2 Troubleshooting Alarms
15-41
15
Maintenance
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.)
––
A.Ed1:
Command Option
Module IF Com-
mand Timeout
Error
Processing of the
servo ON command
from the command
option module is not
completed.
–
Input a servo ON com-
mand when the motor is
stopped.
–
Processing of the
sensor ON command
from the command
option module is not
completed.
–
Check that the encoder is
connected properly.
–
A.F10:
Power Supply
Line Open Phase
(The voltage was
low for more than
one second for
phase R, S, or T
when the main
power supply
was ON.)
The three-phase
power supply wiring is
not correct.
Check the power sup-
ply wiring.
Make sure that the power
supply is correctly wired.
page 4-12
The three-phase
power supply is
unbalanced.
Measure the voltage for
each phase of the
three-phase power sup-
ply.
Balance the power sup-
ply by changing phases.
–
A single-phase power
supply was input with-
out specifying a sin-
gle-phase AC power
supply input (Pn00B =
n.1).
Check the power sup-
ply and the parameter
setting.
Match the parameter set-
ting to the power supply.
page 4-12
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.F50:
Servomotor Main
Circuit Cable Dis-
connection
(The Servomotor
did not operate or
power was not
supplied to the
Servomotor even
though the /S-ON
signal was input
when the Servo-
motor was ready
to receive it.)
A failure occurred in
the SERVOPACK.
–
The SERVOPACK may be
faulty. Replace the SER-
VOPACK.
–
The wiring is not cor-
rect or there is a faulty
contact in the motor
wiring.
Check the wiring.
Make sure that the Servo-
motor is correctly wired.
page 4-26
Continued on next page.
Continued from previous page.
Alarm Number:
Alarm Name
Possible Cause Confirmation Correction Reference