YASKAWA SGM7D-30F Product Manual page 108

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.
Parameters have
A.941:
been changed
that require the
Change of Parame-
power supply to
ters Requires
be turned OFF
Restart
and ON again.
The speed ripple
compensation
information stored
A.942:
in the encoder
does not agree
Speed Ripple Com-
with the speed
pensation Informa-
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.
3.1 FT82 SERVOPACKs with Analog Voltage/Pulse Train References
Confirmation
Lower the surrounding tem-
Check the surrounding
perature by improving the
temperature using a
installation conditions of the
thermostat.
machine.
Use the accumulated
Reconsider the load and
load ratio to check the
operating conditions.
load during operation.
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.
Turn the power supply to
– the SERVOPACK OFF and
ON again.
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-
Measure the power
age within the specified
supply voltage.
range.
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
Measure the power setting of Pn509 (Momen-
supply voltage. tary Power Interruption Hold
Time), decrease the setting.
Replace the SERVOPACK
–
and connect a reactor.
The SERVOPACK may be
– faulty. Replace the SERVO-
PACK.
3.1.6 Troubleshooting Warnings
Continued from previous page.
Correction Reference
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Continued on next page.
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