3.1 FT82 SERVOPACKs with Analog Voltage/Pulse Train References
3.1.6 Troubleshooting Warnings
3
Maintenance
3-39
A.93B:
Overheat Warning
The surrounding
temperature is too
high.
Check the surrounding
temperature using a
thermostat.
Lower the surrounding tem-
perature by improving the
installation conditions of the
machine.
–
Operation was
performed under
an excessive load.
Use the accumulated
load ratio to check the
load during operation.
Reconsider the load and
operating conditions.
–
A failure occurred
in the SERVO-
PACK.
–
The SERVOPACK may be
faulty. Replace the SERVO-
PACK.
–
The sensor
attached to the
machine is faulty.
–
The sensor attached to the
machine may be faulty.
Repair the sensor attached
to the machine.
–
A.941:
Change of Parame-
ters Requires
Restart
Parameters have
been changed
that require the
power supply to
be turned OFF
and ON again.
–
Turn the power supply to
the SERVOPACK OFF and
ON again.
–
A.942:
Speed Ripple Com-
pensation Informa-
tion Disagreement
The speed ripple
compensation
information stored
in the encoder
does not agree
with the speed
ripple compensa-
tion information
stored in the SER-
VOPACK.
–
Reset the speed ripple
compensation value on the
S.
*
–
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.
*
A.971:
Undervoltage
For a 200-V SER-
VOPACK, the AC
power supply volt-
age dropped
below 140 V.
Measure the power
supply voltage.
Set the power supply volt-
age within the specified
range.
–
For a 100-V SER-
VOPACK, the AC
power supply volt-
age dropped
below 60 V.
Measure the power
supply voltage.
Set the power supply volt-
age within the specified
range.
–
The power supply
voltage dropped
during operation.
Measure the power
supply voltage.
Increase the power supply
capacity.
–
A momentary
power interrup-
tion occurred.
Measure the power
supply voltage.
If you have changed the
setting of Pn509 (Momen-
tary Power Interruption Hold
Time), decrease the setting.
*
The SERVOPACK
fuse is blown out.
–
Replace the SERVOPACK
and connect a reactor.
*
A failure occurred
in the SERVO-
PACK.
–
The SERVOPACK may be
faulty. Replace the SERVO-
PACK.
–
Continued on next page.
Continued from previous page.
Warning Number:
Warning Name
Possible Cause
Confirmation
Correction
Reference