Troubleshooting Of Alarms; Alarm Displays - YASKAWA SGDV User Manual

9.1.2 Troubleshooting of Alarms

If an error occurs in the servo drive, the SERVOPACK will output an alarm signal and the alarm number will
be displayed on the digital operator or SigmaWin+.
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 SERVOPACK fault occurred.
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 SERVOPACK fault occurred.
incorrect.)
The power supply voltage sud-
A.022:
denly dropped.
System Checksum
The power supply went OFF
Error 1
while setting a utility function.
(The parameter data in
the SERVOPACK is
A SERVOPACK fault occurred.
incorrect.)
A.030:
Main Circuit Detector A SERVOPACK fault occurred.
Error
The SERVOPACK and servomo-
tor capacities do not match each
other.
A.040:
Parameter Setting
A SERVOPACK fault occurred.
Error 1
(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.
The encoder output pulse (Pn212)
A.041:
is out of the setting range and
Encoder Output Pulse
does not satisfy the setting condi-
Setting Error
tions.
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.
Restart the SERVOPACK several
times. If the alarm still occurs, there
may be noise interference.
Check the installation conditions.
Restart the SERVOPACK 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.
Restart the SERVOPACK several
times. If the alarm still occurs, the
SERVOPACK may be faulty.
−
Check the combination of SERVO-
PACK 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.
Check the parameter Pn212.

9.1 Alarm Displays

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.
Restart 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 may be faulty.
Replace the SERVOPACK.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Select the proper combination of
SERVOPACK and servomotor
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.
Set Pn212 to a correct value.
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