YASKAWA SGM7D-30F Product Manual page 256

Warning Number:
Possible Cause
Warning Name
The surrounding
temperature is too
high.
Operation was
performed under
an excessive load.
A.93B:
Overheat Warning
A failure occurred
in the SERVO-
PACK.
The sensor
attached to the
machine is faulty.
The speed ripple
compensation
information stored
A.942:
in the encoder
Speed Ripple Com- does not agree
pensation Informa- with the speed
ripple compensa-
tion Disagreement
tion information
stored in the SER-
VOPACK.
For a 200-V SER-
VOPACK, the AC
power supply volt-
age dropped
below 140 V.
For a 100-V SER-
VOPACK, the AC
power supply volt-
age dropped
below 60 V.
The power supply
A.971:
voltage dropped
Undervoltage
during operation.
A momentary
power interrup-
tion occurred.
The SERVOPACK
fuse is blown out.
A failure occurred
in the SERVO-
PACK.
3.4 Command Option Attachable-type FT82 SERVOPACKs with INDEXER Modules
Confirmation
Check the surrounding
temperature using a
thermostat.
Use the accumulated
load ratio to check the
load during operation.
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Measure the power
supply voltage.
Measure the power
supply voltage.
Measure the power
supply voltage.
Measure the power
supply voltage.
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3.4.7 Troubleshooting Warnings
Continued from previous page.
Correction
Lower the surrounding tem-
perature by improving the
installation conditions of the
machine.
Reconsider the load and
operating conditions.
The SERVOPACK may be
faulty. Replace the SERVO-
PACK.
The sensor attached to the
machine may be faulty.
Repair the sensor attached
to the machine.
Reset the speed ripple
compensation value on the
SigmaWin+.
Set Pn423 to n.1 (Do
not detect A.942 alarms).
However, changing the set-
ting may increase the speed
ripple.
Set Pn423 to n.0
(Disable torque ripple com-
pensation). However,
changing the setting may
increase the speed ripple.
Set the power supply volt-
age within the specified
range.
Set the power supply volt-
age within the specified
range.
Increase the power supply
capacity.
If you have changed the
setting of Pn509 (Momen-
tary Power Interruption Hold
Time), decrease the setting.
Replace the SERVOPACK
and connect a reactor.
The SERVOPACK may be
faulty. Replace the SERVO-
PACK.
Continued on next page.
Reference
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