Yaskawa Sigma-5 User Manual: Design and Maintenance - Rotary Motors - Manual (Page 292)

9.2 Warning Displays
9-27
T
roubleshooting
A.971 Undervoltage
• For 100-VAC SER-
VOPACKs:
The AC power supply
voltage is 60 V or
below.
• For 200-VAC SER-
VOPACKs:
The AC power supply
voltage is 140 V or
below.
• For 400-VAC SER-
VOPACKs:
The AC power supply
voltage is 280 V or
below.
Measure the power supply voltage.
Use a 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.
An instantaneous power
failure occurred.
Measure the power supply voltage.
Lower the instantaneous power cut
hold time (Pn509).
The fuse in the SERVO-
PACK is burned out.
–
Replace the SERVOPACK and con-
nect an AC/DC reactor to the SERVO-
PACK.
A SERVOPACK fault
occurred.
–
The SERVOPACK may be faulty.
Replace the SERVOPACK.
(cont’d)
Warning
Display
Warning Name
Situation at Warning
Occurrence
Cause Corrective Actions