YASKAWA JUSP-MD D01A Series - Troubleshooting of Alarms

9 Troubleshooting
9.1.2 Troubleshooting of Alarms
9-6
9.1.2 Troubleshooting of Alarms
If an error occurs in servo drives, an alarm display such as A.  and CPF  will appear on the panel dis-
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)
Cause Investigative Actions Corrective Actions
A.020:
Parameter Checksum
Error 1
(The data of the internal
parameter is incorrect.)
The power supply voltage sud-
denly dropped.
Measure the power supply voltage.
Set the power supply voltage within
the specified range, and set Fn005
to initialize the parameter.
The power supply went OFF
while changing a parameter set-
ting.
Check the circumstances when the
power supply went OFF.
Set Fn005 to initialize the parameter
and then set the parameter again.
The number of times that parame-
ters were written exceeded the
limit.
Check to see if the parameters were
frequently changed through the host
controller.
The multi-winding drive unit may
be faulty. Replace the multi-wind-
ing drive unit. Correct the proce-
dure for writing parameters.
Malfunction caused by noise
from the AC power supply or
grounding line, static electricity
noise, etc.
Turn the power supply ON and OFF
several times. If the alarm still
occurs, there may be noise interfer-
ence.
Take countermeasures against
noise.
Gas, water drops, or cutting oil
entered the multi-winding drive
unit and caused internal compo-
nents to fail.
Check the installation conditions.
The multi-winding drive unit may
be faulty. Replace the multi-wind-
ing drive unit.
A fault occurred in the multi-
winding drive unit.
Turn the power supply ON and OFF
several times. If the alarm still
occurs, the multi-winding drive unit
may be faulty.
The multi-winding drive unit may
be faulty. Replace the multi-wind-
ing drive unit.
A.021:
Parameter Format
Error 1
(The data type of the
internal parameter is
incorrect.)
The software version of the
multi-winding drive unit that
caused the alarm is older than that
of the written parameters.
Check Fn012 to see if the set soft-
ware version agrees with that of the
multi-winding drive unit. If not, an
alarm may occur.
Write the parameters of another
multi-winding drive unit of the
same model with the same software
version. Then turn the control
power OFF and ON again.
A fault occurred in the multi-
winding drive unit.
−
The multi-winding drive unit may
be faulty. Replace the multi-wind-
ing drive unit.
A.022:
System Checksum
Error 1
(The data of the internal
parameter is incorrect.)
The power supply voltage sud-
denly dropped.
Measure the power supply voltage.
The multi-winding drive unit may
be faulty. Replace the multi-wind-
ing drive unit.
The power supply went OFF
while setting an utility function.
Check the circumstances when the
power supply went OFF.
The multi-winding drive unit may
be faulty. Replace the multi-wind-
ing drive unit.
A fault occurred in the multi-
winding drive unit.
Turn the power supply ON and OFF
again. If the alarm still occurs, the
multi-winding drive unit may be
faulty.
The multi-winding drive unit may
be faulty. Replace the multi-wind-
ing drive unit.
A.030:
Main Circuit Detector
Error
A fault occurred in the SERVO-
PACK or converter.
−
The SERVOPACK or converter
may be faulty. Replace the SERVO-
PACK or converter.