10 Inspection, Maintenance, and Troubleshooting
10.1.5 Troubleshooting of Alarm and Warning
10-8
A.10
Overcurrent
(An overcurrent
flowed through
the IGBT) or
Heat Sink
Overheated
(cont’d)
Occurred when the
main circuit power
supply was turned
ON or while the ser-
vomotor was run-
ning.
A short circuit occurred between the grounding and
U, V, W of the servomotor.
Replace the servomotor.
A short circuit occurred between phases U, V, and W
of the servomotor.
Load moment of inertia was large and DB circuit
fault occurred when a dynamic brake is applied dur-
ing high-speed motor running.
Reduce the load.
Reduce the motor speed at dynamic brake or
replace the SERVOPACK.
The dynamic brake was activated too frequently, so
a DB overload alarm occurred.
Reduce the DB operation frequency or replace the
SERVOPACK.
The overload alarm has been reset by turning OFF
the power too many times.
Change the method to reset the alarm.
The overload or regenerative power exceeds the
regenerative resistor’s capacity.
Reconsider the load and operation conditions.
The direction or the distance of the SERVOPACK to
other devices is incorrect.
The surrounding air temperature for the
SERVOPACK must be 55°C
or less.
A SERVOPACK fan fault occurred. Replace the SERVOPACK.
A SERVOPACK fault occurred.
A.30
Regeneration
Error Detected
Occurred when the
control power sup-
ply was turned ON.
A SERVOPACK fault occurred. Replace the SERVOPACK.
Occurred when the
main circuit power
supply was turned
ON.
A regenerative resistor is not connected. Check the wiring of the regenerative resistor.
A regenerative resistor is disconnected. Replace the regenerative resistor.
A SERVOPACK fault occurred, such as regenerative
transistor fault.
Replace the SERVOPACK.
Occurred during
normal operation.
Check for incorrect wiring and disconnection of the
regenerative resistor.
Correct the wiring for the regenerative resistor.
The regenerative resistor is disconnected. Reconsider the load and operation conditions and
check if the regenerative energy become exces-
sive, or replace the regenerative resistor.
A SERVOPACK fault, such as regenerative transis-
tor fault, occurred.
Replace the SERVOPACK.
A.32
Regenerative
Overload
Occurred when the
control power sup-
ply was turned ON.
A SERVOPACK fault occurred. Replace the SERVOPACK.
Occurred during
normal operation
(large increase of
regenerative resistor
temperature).
The regenerative energy exceeds the allowable
value.
Select a proper regenerative resistance capacity, or
reconsider the load and operation conditions.
The regenerating state continued.
Occurred during
normal operation
(small increase of
regenerative resistor
temperature).
The setting of parameter Pn600 is smaller than the
regenerative resistor’s capacity.
Correct the set value of parameter Pn600.
A SERVOPACK fault occurred. Replace the SERVOPACK.
Occurred at servo-
motor deceleration.
The regenerative energy is excessive. Select a proper regenerative resistance capacity, or
reconsider the load and operation conditions.
A.33
Main Circuit
Wiring Error
Occurred when the
control power sup-
ply was turned ON.
A SERVOPACK fault occurred. Replace the SERVOPACK.
Residual voltage exists in the main circuit. Reconsider the resistance value of the regenera-
tive resistor.
Occurred when the
main circuit power
supply was turned
ON.
In the DC power input mode, AC power is supplied
through L1, L2, and L3.
For AC power input, Pn001.2=0.
For DC power input, Pn001.2=1.
In the AC power input mode, DC power is supplied
through 1 and terminals.
Table 10.5 Alarm Display and Troubleshooting (cont’d)
Alarm
Display
Alarm Name
Situation at Alarm
Occurrence
Cause Corrective Actions
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