Yaskawa Σ-V Series AC Servo Drives Rotational Motor Analog Voltage Reference - Manual (Page 266)

9.1 Alarm Displays
9-7
9
Trou
blesh
ooting
A.100:
Overcurrent or Heat
Sink Overheated
(An overcurrent flowed
through the IGBT or
heat sink of SERVO-
PACK overheated.)
Incorrect wiring or contact fault
of servomotor main circuit
cables.
Check the wiring. Refer to 3.1
Main Circuit Wiring.
Correct the wiring.
Short-circuit or ground fault of
servomotor main circuit cables.
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 .
The cable may be short-circuited.
Replace the cable.
Short-circuit or ground fault
inside the servomotor.
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 .
The servomotor may be faulty.
Replace the servomotor.
Short-circuit or ground fault
inside the SERVOPACK.
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 .
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A heavy load was applied while
the servomotor was stopped or
running at a low speed. Check to see if the operating condi-
tions are outside servo drive specifi-
cations. Reduce the load applied to the ser-
vomotor or increase the operating
speed.
Malfunction caused by noise
interference.
Improve the wiring or installation
environment, such as by reducing
noise, and check to see if the alarm
recurs.
Take countermeasures for noise,
such as correct wiring of the FG.
Use an FG wire size equivalent to
the SERVOPACK main circuit wire
size.
A SERVOPACK fault occurred. −
Restart the SERVOPACK. If the
alarm still occurs, the SERVO-
PACK may be faulty. Replace the
SERVOPACK.
A.400:
Overvoltage
(Detected in the SER-
VOPACK main circuit
power supply section.)
The DC power supply voltage
exceeded 60 V.
Measure the power supply voltage. Set DC power supply voltage within
the specified range.
The power supply is unstable, or
was influenced by a lightning
surge. Measure the power supply voltage.
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.
Voltage for DC power supply was
too high during acceleration or
deceleration. Check the power supply voltage and
the speed and torque during opera-
tion.
Set DC power supply voltage within
the specified range.
The moment of inertia ratio
exceeded the allowable value. Confirm that the moment of inertia
ratio is within the allowable range. Increase the deceleration time, or
reduce the load.
A SERVOPACK fault occurred. −
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.
A.450:
Main-Circuit
Capacitor Overvoltage
A SERVOPACK fault occurred. − Replace the SERVOPACK.
(cont’d)
Alarm Number:
Alarm Name
(Alarm Description)
Cause Investigative Actions Corrective Actions