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9 Troubleshooting
9.2.2 Troubleshooting of Warnings
9-24
A.971: Under-
voltage
• For 100 VAC SER-
VOPACKs:
The AC power supply
voltage
is 60 V or
less.
• For 200-VAC SER-
VOPACKs:
The AC power supply
voltage
is 140 V or
less.
• For 400-VAC SER-
VOPACKs:
The AC power supply
voltage
is 280 V or
less.
Measure the power supply voltage.
Set the power supply voltage within
the specified range.
The power supply volt-
age dropped during
operation.
Measure the power supply voltage. Increase the power supply capacity.
Occurrence of instanta-
neous power interrup-
tion.
Measure the power supply voltage.
When the instantaneous power cut
hold time (Pn509) is
set, decrease the
setting.
The SERVOPACK fuse
is blown out.
Replace the SERVOPACK and con-
nect a reactor to the SERVOPACK.
A SERVOPACK fault
occurred.
The SERVOPACK may be faulty.
Replace the
SERVOPACK.
A.9A0: Overtrav-
el
(Overtravel status
is
detected.)
When the servomotor
power is ON, over-
travel status is detected.
Check the input signal monitor
(Un005) to check the status of the
overtravel signals.
Refer to 9.3 Troubleshooting Malfunc-
tion Based on Operation and Condi-
tions of the Servomotor. Even if
overtravel signals were not shown by
the input
signal monitor (Un005),
momentary overtravel may have been
detected. Take the following precau-
tions.
• Do not specify movements that
wo
uld cause overtravel from the
host controller.
• Check the wiring of the overtravel
signals.
• Take countermeasures for noise.
(cont’d)
Warning Num-
ber: Warning
Name (Warning
Description)
Cause Investigative Actions Corrective Actions
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