YASKAWA SGDH User Manual page 548

10 Inspection, Maintenance, and Troubleshooting
10.1.6 Troubleshooting of Alarm and Warning
Alarm
Alarm Name
Display
A.10
Overcurrent
(An overcurrent
flowed through
the IGBT) or
Heat Sink Over-
heated
A.30
Regeneration
Error Detected
(Detected when
the power to the
main circuit was
turned ON.)
Table 10.6 Alarm Display and Troubleshooting (Cont'd)
Situation at Alarm
Occurrence
Occurred when the The overload alarm has been reset by turning OFF
control power sup- the power too many times.
ply was turned ON.
The connection is faulty between the SERVOPACK
board and the thermostat switch.
The SERVOPACK board fault occurred.
Occurred when the The connection between grounding and U, V, or W
main circuit power is incorrect.
supply was turned
The grounding line has contact with other terminals.
ON or when an
A short circuit occurred between the grounding and
overcurrent
U, V, or W of the servomotor cable.
occurred while the
A short circuit occurred between phases U, V, and W
servomotor was
of the servomotor.
running.
The wiring of the regenerative resistor is incorrect.
A short circuit occurred between the grounding and
U, V, or W of 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.
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.
The overload alarm has been reset by turning OFF
the power too many times.
The excessive change was given to the position/
speed reference.
The overload or regenerative power exceeds the
regenerative resistor's capacity.
The direction or the distance of the SERVOPACK to
other devices is incorrect.
Heat radiation of the panel or heat around the panel
occurred.
A SERVOPACK fan fault occurred.
A SERVOPACK fault occurred.
Occurred when the A SERVOPACK board fault occurred.
control power sup-
ply was turned ON.
Occurred when the An external regenerative resistor is not connected
main circuit power for a servomotor of 6.0 kW or more.
supply was turned
Pn600 is set to a value other than 0 for a servomotor
ON.
of 400 W or less, and an external regenerative resis-
tor is not connected.
Check for incorrect wiring or a disconnected wire in
the regenerative resistor.
A SERVOPACK fault occurred, such as regenerative
transistor or a voltage sensor fault.
The jumper between B2 and B3 is removed for a ser-
vomotor of 500 W or more, and 5.0 kW or less.
Occurred during Check for incorrect wiring and disconnection of the
normal operation. regenerative resistor.
The regenerative resistor is disconnected, so the
regenerative energy became excessive.
A SERVOPACK fault, such as regenerative transis-
tor and voltage sensor fault, occurred.
Cause
10-8
Corrective Actions
Change the method to reset the alarm.
Replace the SERVOPACK.
Check and then correct the wiring.
Repair or replace the servomotor main circuit
cable.
Check and then correct the wiring.
Replace the SERVOPACK.
Replace the servomotor.
Replace the SERVOPACK, and reduce the DB
operation frequency.
Change the method to reset the alarm.
Recheck the reference value.
Reconsider the load and operation conditions.
The ambient temperature for the SERVOPACK
°
C or less.
must be 55
Replace the SERVOPACK.
Replace the SERVOPACK.
Connect an external regenerative resistor.
Connect an external regenerative resistor, or set
Pn600 to 0 if an external regenerative resistor is
not connected.
Correct the wiring for the external regenerative
resistor.
Replace the SERVOPACK.
Correct the wiring.
Correct the wiring for the external regenerative
resistor.
Replace the regenerative resistor or replace the
SERVOPACK. Reconsider the load and operation
conditions.
Replace the SERVOPACK.