Yaskawa Sigma-5 User Manual: Design and Maintenance - Rotary Motors - Analog Voltage and Pulse Train Reference - Manual (Page 371)

10 Troubleshooting
10.2.2 Troubleshooting of Warnings
10-24
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 10.3 Troubleshooting Mal-
function Based on Operation and
Conditions 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
would 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