YASKAWA E-7S SERVOPACK SGD7S Product Manual page 570

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.
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
A.971:
below 60 V.
Undervoltage
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.
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.
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.
15.3 Warning Displays
15.3.2 Troubleshooting Warnings
Continued from previous page.
Correction Reference
–
–
–
–
page 8-58
page 8-58
page 8-58
–
–
page 6-11
page 4-25
–
Continued on next page.
15
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