YASKAWA E-V Series User Manual page 303

9 Troubleshooting
9.1.2 Troubleshooting of Alarms
Alarm:
Alarm Name
A.330:
Main Circuit Power
Supply Wiring Error
(Detected when the
power to the main circuit
is turned ON.)
A.400:
Overvoltage
(Detected in the SER-
VOPACK main circuit
power supply section.)
9-10
Cause
The regenerative resistor discon-
nected when the SERVOPACK
power voltage was increased.
In the AC power input mode, DC
power was supplied.
In the DC power input mode, AC
power was supplied.
Regenerative resistor capacity
(Pn600) is not set to 0 even
though the regenerative resistor is
disconnected.
A SERVOPACK fault occurred.
For 100 and 200 VAC SERVO-
PACKs:
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.
The power supply is unstable, or
was influenced by a lightning
surge.
For 100 and 200 VAC SERVO-
PACKs:
The servomotor accelerated/
decelerated with the AC power
voltage between 230 and 270 V.
For 400 VAC SERVOPACKs:
The servomotor accelerated/
decelerated with the AC power
voltage between 480 and 560 V.
The external regenerative resis-
tance is too high for the actual
operation conditions.
The mass exceeded the allowable
value.
A SERVOPACK fault occurred.
Investigative Actions
Measure the resistance of the regen-
erative resistor.
Check the power supply to see if it
is a DC power supply.
Check the power supply to see if it
is a AC power supply.
Is the regenerative resistor con-
nected?
If it is, check the regenerative resis-
tor capacity.
−
Measure the power supply voltage.
Measure the power supply voltage.
Check the power supply voltage and
the speed and force during opera-
tion.
Check the operation conditions and
the regenerative resistance.
Confirm that the mass is within the
allowable range.
−
Corrective Actions
When using a regenerative resistor
built in the SERVOPACK:
Repair or replace the SERVO-
PACK.
When using an external regenera-
tive resistor:
Replace the external regenerative
resistor.
Correct the settings to match the
actual power supply specifications.
Correct the settings to match the
actual power supply specifications.
Set Pn600 to 0.
The SERVOPACK may be faulty.
Repair or replace the SERVO-
PACK.
Set AC power supply voltage within
the specified range.
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.
Repair or replace the SERVO-
PACK.
Set AC power supply voltage within
the specified range.
Select a regenerative resistance
value appropriate for the operation
conditions and load.
Increase the deceleration time, or
reduce the load.
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. Repair or
replace the SERVOPACK.