YASKAWA E-7-Series SGD7S Product Manual page 471

12.3 Warning Displays
12.3.2 Troubleshooting Warnings
Warning Number:
Warning Name
A.913:
Internal Tempera-
ture Warning 2
(Power Board Tem-
perature Error)
A.920:
Regenerative Over-
load (warning before
an A.320 alarm
occurs)
12-48
Possible Cause Confirmation
Check the surrounding
temperature using a
The surrounding thermostat. Or, check
temperature is too the operating status
high. with the SERVOPACK
installation environ-
ment monitor.
An overload alarm
was reset by turn- Check the alarm display
ing OFF the power to see if there is an
supply too many overload alarm.
times.
There was an Use the accumulated
excessive load or load ratio to check the
operation was load during operation,
performed that and use the regenera-
exceeded the tive load ratio to check
regenerative pro- the regenerative pro-
cessing capacity. cessing capacity.
The SERVOPACK
installation orien-
tation is not cor- Check the SERVO-
rect or there is PACK installation con-
insufficient space ditions.
around the SER-
VOPACK.
A failure occurred
in the SERVO- –
PACK.
The power supply
voltage exceeded Measure the power
the specified supply voltage.
range.
There is insuffi-
cient external
regenerative resis-
Check the operating
tance, regenera-
conditions or the
tive resistor
capacity using the Sig-
capacity, or SER-
maJunmaSize+ Capac-
VOPACK capac-
ity Selection Software
ity, or there has
or another means.
been a continuous
regeneration
state.
There was a con-
tinuous regenera-
Check the load applied
tion state because
to the Servomotor
a negative load
during operation.
was continuously
applied.
Continued from previous page.
Correction
Decrease the surrounding
temperature by improving
the SERVOPACK installa-
tion conditions.
Change the method for
resetting the alarm.
Reconsider the load and
operating conditions.
Install the SERVOPACK
according to specifications.
The SERVOPACK may be
faulty. Replace the SERVO-
PACK.
Set the power supply volt-
age within the specified
range.
Change the regenerative
resistance value, regenera-
tive resistance capacity, or
SERVOPACK capacity.
Reconsider the operating
conditions using the Sigma-
JunmaSize+ Capacity
Selection Software or other
means.
Reconsider the system
including the servo,
machine, and operating
conditions.
Reference
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page 3-3,
page 3-5
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