Yaskawa Sigma-5 User Manual: Design and Maintenance - Rotary Motors - Manual (Page 275)

9 Troubleshooting
9.1.2 Troubleshooting of Alarms
9-10
A.400:
Overvoltage
(Detected in the SER-
VOPACK's main circuit
power supply section.)
• For 100 VAC SERVOPACKs:
The AC power supply voltage
exceeded 145 V.
• For 200 VAC SERVOPACKs:
The AC power supply voltage
exceeded 290 V.
• For 400 VAC SERVOPACKs:
The AC power supply voltage
exceeded 580 V.
• For 200 VAC SERVOPACKs
with DC power supply input:
The power supply voltage
exceeded 410 V.
• For 400 VAC SERVOPACKs
with DC power supply input:
The power supply voltage
exceeded 820 V.
Measure the power supply voltage.
Set AC/DC power supply voltage
within the specified range.
The power supply is unstable, or
was influenced by a lightning
surge.
Measure the power supply voltage.
Improve the power supply condi-
tions by installing a surge absorber,
etc. Then, turn the power supply
ON again. If the alarm still occurs,
the SERVOPACK may be faulty.
Replace the SERVOPACK.
Acceleration/deceleration was
executed under the following
conditions.
• The AC power supply voltage
of 100 VAC SERVOPACK was
in the range between 115 V and
135 V.
• The AC power supply voltage
of 200 VAC SERVOPACK was
in the range between 230 V and
270 V.
• The AC power supply voltage
of 400 VAC SERVOPACK was
in the range between 480 V and
560 V.
Check the power supply voltage and
the speed and torque during opera-
tion.
Set AC power supply voltage within
the specified range.
The external regenerative resis-
tance is too high for the actual
operation conditions.
Check the operation conditions and
the regenerative resistance.
Select a regenerative resistance
value appropriate for the operation
conditions and load.
The moment of inertia exceeded
the allowable value. Confirm that the moment of inertia
ratio is within the allowable range. Increase the deceleration time, or
reduce the load.
A SERVOPACK fault occurred. −
Turn the control power OFF and
then ON again while the main cir-
cuit power supply is OFF. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
(cont’d)
Alarm:
Alarm Name
Cause Investigative Actions Corrective Actions