Troubleshooting Of Alarms - YASKAWA Sigma-V Series User Manual

10.1.2 Troubleshooting of Alarms

If an error occurs in servo drives, an alarm display such as A.
play.
Refer to the following table to identify the cause of an alarm and the action to be taken.
Contact your Yaskawa representative if the problem cannot be solved by the described corrective action.
Alarm Number:
Alarm Name
(Alarm Description)
The power supply voltage sud-
denly dropped.
The power supply went OFF
while changing a parameter set-
ting.
The number of times that parame-
ters were written exceeded the
A.020:
limit.
Parameter Checksum
Error 1
Malfunction caused by noise
(The parameter data in
from the AC power supply or
the SERVOPACK is
grounding line, static electricity
incorrect.)
noise, etc.
Gas, water drops, or cutting oil
entered the SERVOPACK and
caused failure of the internal
components.
A fault occurred in the SERVO-
PACK.
The software version of SERVO-
A.021:
PACK that caused the alarm is
Parameter Format
older than that of the written
Error 1
parameter.
(The parameter data in
the SERVOPACK is
A fault occurred in the SERVO-
incorrect.)
PACK.
The power supply voltage sud-
denly dropped.
A.022:
System Checksum The power supply went OFF
Error 1 while setting an utility function.
(The parameter data in
the SERVOPACK is
A fault occurred in the SERVO-
incorrect.)
PACK.
A.030:
A fault occurred in the SERVO-
Main Circuit Detector
PACK or converter.
Error
The SERVOPACK capacity, con-
verter capacity, and the servomo-
tor capacity do not match each
other.
A.040:
Parameter Setting
A fault occurred in the SERVO-
Error 1
PACK.
(The parameter setting
The parameter setting is out of
was out of the setting
the setting range.
range.)
The electronic gear ratio is out of
the setting range.
Cause Investigative Actions
Measure the power supply voltage.
Check the circumstances when the
power supply went OFF.
Check to see if the parameters were
frequently changed through the host
controller.
Turn the power supply ON and OFF
several times. If the alarm still
occurs, there may be noise interfer-
ence.
Check the installation conditions.
Turn the power supply ON and OFF
several times. If the alarm still
occurs, the SERVOPACK may be
faulty.
Check Fn012 to see if the set soft-
ware version agrees with that of the
SERVOPACK. If not, an alarm may
occur.
−
Measure the power supply voltage.
Check the circumstances when the
power supply went OFF.
Turn the power supply ON and OFF
several times. If the alarm still
occurs, the SERVOPACK may be
faulty.
−
Check the combination of SERVO-
PACK, converter, and servomotor
capacities.
−
Check the setting ranges of the
parameters that have been changed.
Check the electronic gear ratio. The
ratio must satisfy:
0.001< (Pn20E/Pn210) < 4000.
10.1 Alarm Displays
and CPF will appear on the panel dis-
Corrective Actions
Set the power supply voltage within
the specified range, and set Fn005
to initialize the parameter.
Set Fn005 to initialize the parameter
and then set the parameter again.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Reconsider the method of writing
parameters.
Take countermeasures against
noise.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Write the parameter of another
SERVOPACK of the same model
with the same software version.
Then turn the power OFF and then
ON again.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
The SERVOPACK or converter
may be faulty. Replace the SERVO-
PACK or converter.
Select the proper combination of
capacities.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Set the parameter to a value within
the setting range.
Set the electronic gear ratio in the
range: 0.001< (Pn20E/Pn210)
< 4000.
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