YASKAWA SGD7S series Product Manual page 170

Alarm Number:
Possible Cause
Alarm Name
The power supply
voltage exceeded the
specified range.
The power supply is
not stable or was
influenced by a light-
ning surge.
The voltage for AC
power supply was too
A.400:
high during accelera-
Overvoltage
tion or deceleration.
(Detected in the
main circuit
The external regener-
power supply
ative resistance is too
section of the
high for the operating
SERVOPACK.)
conditions.
The moment of inertia
ratio or mass ratio
exceeded the allow-
able value.
A failure occurred in
the SERVOPACK.
The power supply
voltage went below
the specified range.
The power supply
voltage dropped
during operation.
A.410:
Undervoltage
A momentary power
(Detected in the
interruption occurred.
main circuit
power supply
section of the
SERVOPACK.)
The SERVOPACK
fuse is blown out.
A failure occurred in
the SERVOPACK.
Confirmation
Set the AC/DC power
Measure the power
supply voltage within the
supply voltage.
specified range.
Improve the power sup-
ply conditions, install a
surge absorber, and then
turn the power supply
Measure the power
OFF and ON again. If an
supply voltage.
alarm still occurs, the
SERVOPACK may be
faulty. Replace the SER-
VOPACK.
Check the power sup-
Set the AC power supply
ply voltage and the
voltage within the speci-
speed and torque
fied range.
during operation.
Select a regenerative
Check the operating
resistance value that is
conditions and the
appropriate for the oper-
regenerative resistance.
ating conditions and load.
Check to see if the
moment of inertia ratio Increase the deceleration
or mass ratio is within time, or reduce the load.
the allowable range.
While the main circuit
power supply is OFF, turn
the control power supply
to the SERVOPACK OFF
– and ON again. If an alarm
still occurs, the SERVO-
PACK may be faulty.
Replace the SERVO-
PACK.
Set the power supply volt-
Measure the power
age within the specified
supply voltage.
range.
Measure the power Increase the power supply
supply voltage. capacity.
If you have changed the
setting of Pn509 (Momen-
Measure the power
tary Power Interruption
supply voltage.
Hold Time), decrease the
setting.
Replace the SERVO-
PACK and connect a
reactor to the DC reactor
–
terminals ( 1 and
the SERVOPACK.
The SERVOPACK may be
– faulty. Replace the SER-
VOPACK.
9.1 Alarm Displays
9.1.2 Troubleshooting Alarms
Continued from previous page.
Correction Reference
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*4
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*1
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2) on
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Continued on next page.
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