YASKAWA SGD7S-R70A20A023F40B, Product Manual

Page: 181 / 342

5.2 FT41 Specification
5.2.3 Troubleshooting Alarms
5-93
5
Maintenance
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 SER-
VOPACK input signal cir-
cuits 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.)
A.Ed1:
Command Exe-
cution Timeout
A timeout error
occurred for a
MECHATROLINK
command.
Check the motor status
when the command is
executed.
Execute the SV_ON or
SENS_ON command only
when the motor is not
operating.
–
•
For fully-closed loop
control, check the
status of the external
encoder when the
command is exe-
cuted.
•
For other types of
control, check the
status of the linear
encoder when the
command is exe-
cuted.
Execute the SENS_ON
command only when an
external rotary encoder or
linear encoder is con-
nected.
–
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.
*1
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 sig-
nal-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.
*1
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.
–
Continued on next page.
Continued from previous page.
Alarm Number:
Alarm Name
Possible Cause Confirmation Correction Reference