10 Inspection, Maintenance, and Troubleshooting
10.1.6 Troubleshooting of Alarm and Warning
10-8
A.10
Overcurrent
(An overcurrent
flowed through
the IGBT) or
Heat Sink Over-
heated
Occurred when the
control power sup-
ply was turned ON.
The overload alarm has been reset by turning OFF
the power too many times.
Change the method to reset the alarm.
The connection is faulty between the SERVOPACK
board and the thermostat switch.
Replace the SERVOPACK.
The SERVOPACK board fault occurred.
Occurred when the
main circuit power
supply was turned
ON or when an
overcurrent
occurred while the
servomotor was
running.
The connection between grounding and U, V, or W
is incorrect.
Check and then correct the wiring.
The grounding line has contact with other terminals.
A short circuit occurred between the grounding and
U, V, or W of the servomotor cable.
Repair or replace the servomotor main circuit
cable.
A short circuit occurred between phases U, V, and W
of the servomotor.
The wiring of the regenerative resistor is incorrect.
Check and then correct the wiring.
A short circuit occurred between the grounding and
U, V, or W of the SERVOPACK.
Replace the SERVOPACK.
A SERVOPACK fault occurred (current feedback
circuit, power transistor or board fault).
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.
The dynamic brake was activated too frequently, so
a DB overload alarm occurred.
Replace the SERVOPACK, and reduce the DB
operation frequency.
The overload alarm has been reset by turning OFF
the power too many times.
Change the method to reset the alarm.
The excessive change was given to the position/
speed reference.
Recheck the reference value.
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.
Heat radiation of the panel or heat around the panel
occurred.
The ambient 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
(Detected when
the power to the
main circuit was
turned ON.)
Occurred when the
control power sup-
ply was turned ON.
A SERVOPACK board fault occurred.
Replace the SERVOPACK.
Occurred when the
main circuit power
supply was turned
ON.
An external regenerative resistor is not connected
for a servomotor of 6.0 kW or more.
Connect an external regenerative resistor.
Pn600 is set to a value other than 0 for a servomotor
of 400 W or less, and an external regenerative resis-
tor is not connected.
Connect an external regenerative resistor, or set
Pn600 to 0 if an external regenerative resistor is
not connected.
Check for incorrect wiring or a disconnected wire in
the regenerative resistor.
Correct the wiring for the external regenerative
resistor.
A SERVOPACK fault occurred, such as regenerative
transistor or a voltage sensor fault.
Replace the SERVOPACK.
The jumper between B2 and B3 is removed for a ser-
vomotor of 500 W or more, and 5.0 kW or less.
Correct the wiring.
Occurred during
normal operation.
Check for incorrect wiring and disconnection of the
regenerative resistor.
Correct the wiring for the external regenerative
resistor.
The regenerative resistor is disconnected, so the
regenerative energy became excessive.
Replace the regenerative resistor or replace the
SERVOPACK. Reconsider the load and operation
conditions.
A SERVOPACK fault, such as regenerative transis-
tor and voltage sensor fault, occurred.
Replace the SERVOPACK.
Table 10.6 Alarm Display and Troubleshooting (Cont’d)
Alarm
Display
Alarm Name
Situation at Alarm
Occurrence
Cause
Corrective Actions
Summary of Contents for SGDH
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