YASKAWA Sigma-V Series User Manual page 366

10 Troubleshooting
10.1.2 Troubleshooting of Alarms
Alarm Number:
Alarm Name
(Alarm Description)
A.300:
Regeneration Error
A.320:
Regenerative
Overload
A.330:
Main Circuit Power
Supply Wiring Error
(Detected when the
power to the main circuit
is turned ON.)
10-10
Cause
An external regenerative resistor
unit is not connected.
The regenerative resistor unit is
incorrectly wired, or is removed
or disconnected.
The connection of the I/O signals
(CN901) between the SERVO-
PACK and converter is faulty.
A fault occurred in the SERVO-
PACK or converter.
The power supply voltage
exceeds the specified limit.
Insufficient regenerative resis-
tance, regenerative resistor
capacity.
Or, regenerative power has been
continuously flowing back.
Regenerative power continu-
ously flowed back because nega-
tive load was continuously
applied.
The setting of parameter Pn600 is
smaller than the regenerative
resistor's capacity.
The regenerative resistance is too
high.
The connection of the I/O signals
(CN901) between the SERVO-
PACK and converter is faulty.
A fault occurred in the SERVO-
PACK or converter.
The regenerative resistor unit was
disconnected when the power
supply voltage to the SERVO-
PACK and converter was high.
DC power was supplied.
An regenerative resistor unit is
not connected.
The 1 and 2 terminals of the
converter are open.
The connection of the I/O signals
(CN901) between the SERVO-
PACK and converter is faulty.
A fault occurred in the SERVO-
PACK or converter.
Investigative Actions
Check the external regenerative
resistor unit connection.
Check the regenerative resistor unit
connection.
Check the connection of CN901.
−
Measure the power supply voltage.
Check the operating condition or
the capacity using the capacity
selection Software SigmaJunma-
Size+, etc.
Check the load applied to the servo-
motor during operation.
Check the regenerative resistor unit
connection and the value of the
Pn600.
Check the regenerative resistance.
Check the connection of CN901.
−
Measure the resistance of the regen-
erative resistor unit using a measur-
ing instrument.
Check the power supply to see if it
is a AC power supply.
Check the regenerative resistor unit
connection.
Check the 1 and 2 terminals on
the converter.
Check the connection of CN901.
−
(cont'd)
Corrective Actions
Connect the external regenerative
resistor unit.
Correctly connect the regenerative
resistor unit.
Correctly connect CN901.
While the main circuit power sup-
ply is OFF, turn the control power
supply OFF and then ON again. If
the alarm still occurs, the SERVO-
PACK or converter may be faulty.
Replace the SERVOPACK or con-
verter.
Set the power supply voltage within
the specified range.
Change the regenerative resistance,
regenerative resistor capacity.
Reconsider the operating conditions
using the capacity selection soft-
ware SigmaJunmaSize+, etc.
Reconsider the system including
servo, machine, and operating con-
ditions.
Set the Pn600 to a correct value.
Change the regenerative resistance
to a correct value or use an external
regenerative resistor of appropriate
capacity.
Correctly connect CN901.
The SERVOPACK or converter
may be faulty. Replace the SERVO-
PACK or converter.
Replace the regenerative resistor
unit.
Use an AC power supply.
Connect the regenerative resistor
unit.
Correctly connect the 1 and
terminals on the converter.
Correctly connect CN901.
The SERVOPACK or converter
may be faulty. Replace the SERVO-
PACK or converter.
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