YASKAWA SGDV User Manual page 266

Alarm Number:
Alarm Name
(Alarm Description)
Incorrect wiring or contact fault
of servomotor main circuit
cables.
Short-circuit or ground fault of
servomotor main circuit cables.
Short-circuit or ground fault
inside the servomotor.
A.100:
Overcurrent or Heat
Sink Overheated
(An overcurrent flowed
Short-circuit or ground fault
through the IGBT or
inside the SERVOPACK.
heat sink of SERVO-
PACK overheated.)
A heavy load was applied while
the servomotor was stopped or
running at a low speed.
Malfunction caused by noise
interference.
A SERVOPACK fault occurred.
The DC power supply voltage
exceeded 60 V.
The power supply is unstable, or
was influenced by a lightning
surge.
A.400:
Overvoltage Voltage for DC power supply was
too high during acceleration or
(Detected in the SER-
deceleration.
VOPACK main circuit
power supply section.)
The moment of inertia ratio
exceeded the allowable value.
A SERVOPACK fault occurred.
A.450:
Main-Circuit A SERVOPACK fault occurred.
Capacitor Overvoltage
Cause Investigative Actions
Check the wiring. Refer to 3.1
Main Circuit Wiring.
Check for short-circuits across the
servomotor terminal phases U, V,
and W, or between the grounding
and servomotor terminal phases U,
V, or W. Refer to 3.1 Main Circuit
Wiring.
Check for short-circuits across the
servomotor terminal phases U, V,
and W, or between the grounding
and servomotor terminal phases U,
V, or W. Refer to 3.1 Main Circuit
Wiring.
Check for short-circuits across the
servomotor connection terminals U,
V, and W on the SERVOPACK, or
between the grounding and terminal
U, V, or W. Refer to 3.1 Main Cir-
cuit Wiring.
Check to see if the operating condi-
tions are outside servo drive specifi-
cations.
Improve the wiring or installation
environment, such as by reducing
noise, and check to see if the alarm
recurs.
−
Measure the power supply voltage.
Measure the power supply voltage.
Check the power supply voltage and
the speed and torque during opera-
tion.
Confirm that the moment of inertia
ratio is within the allowable range.
−
−
9.1 Alarm Displays
(cont'd)
Corrective Actions
Correct the wiring.
The cable may be short-circuited.
Replace the cable.
The servomotor may be faulty.
Replace the servomotor.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Reduce the load applied to the ser-
vomotor or increase the operating
speed.
Take countermeasures for noise,
such as correct wiring of the FG.
Use an FG wire size equivalent to
the SERVOPACK main circuit wire
size.
Restart the SERVOPACK. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
Set DC power supply voltage within
the specified range.
Improve the power supply condi-
tions by installing a surge absorber,
etc. Then, restart the SERVOPACK.
If the alarm still occurs, the SER-
VOPACK may be faulty. Replace
the SERVOPACK.
Set DC power supply voltage within
the specified range.
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. Replace the
SERVOPACK.
Replace the SERVOPACK.
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