16.3 Warning Displays
16.3.2 Troubleshooting Warnings
16-53
16
Maintenance
93Bh:
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
Linear Servomotor or 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 temperature
detection circuit in
the Linear Servo-
motor is faulty or
the sensor
attached to the
machine is faulty.
–
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.
–
942h:
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 (2423h) to
n.
1
(Do not detect
A.942 alarms). However,
changing the setting may
increase the speed ripple.
–
Set Pn423 (2423h) to
n.
0 (Disable speed
ripple compensation). How-
ever, changing the setting
may increase the speed rip-
ple.
971h:
Undervoltage
For a 400-V SER-
VOPACK, the AC
power supply volt-
age dropped
below 280 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 (2509h)
(Momentary Power Inter-
ruption 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