YASKAWA SGD7S series Product Manual page 529

Warning Number:
Possible Cause
Warning Name
The surrounding
temperature is too
high.
Operation was
performed under
an excessive load.
A failure occurred
A.93B:
in the SERVO-
Overheat Warning
PACK.
The temperature
detection circuit in
the Linear Servo-
motor is faulty or
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
Restart be turned OFF
and ON again.
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
SERVOPACK.
For a 200-V
SERVOPACK, the
AC power supply
voltage dropped
below 140 V.
For a 100-V
SERVOPACK, the
AC power supply
voltage 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.
Confirmation
Lower the surrounding tem-
Check the surrounding perature by improving the
temperature using a installation conditions of the
thermostat. Linear Servomotor or the
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 temperature detection
circuit in the Linear Servo-
motor may be faulty or the
sensor attached to the
–
machine may be faulty.
Replace the Linear Servo-
motor or 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 speed 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.
12.3 Warning Displays
12.3.2 Troubleshooting Warnings
Continued from previous page.
Correction Reference
–
–
–
–
–
page 8-60
page 8-60
page 8-60
–
–
–
page 6-13
page 4-24
–
Continued on next page.
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