10 Maintenance, Inspections, and Troubleshooting
10.2.2 Troubleshooting of Alarms
10-6
10.2.2
Troubleshooting of Alarms
When a problem occurs in the servo drive, you can detect it by reading the alarm with the MECHATROLINK
ALM_RD command. You can check the alarm that occurs in the
Alarm Display
dialog box of the Sig-
maWin+.
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 error 1
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 SERVOPACK may be faulty.
Replace the SERVOPACK.
Reconsider the method of writing
parameters.
Malfunction caused by noise
from the AC power supply or
grounding line, static electricity
noise, etc.
Restart the SERVOPACK several
times. If the alarm still occurs, there
may be noise interference.
Take countermeasures against
noise.
Gas, water drops, or cutting oil
entered the SERVOPACK and
caused failure of the internal
components.
Check the installation conditions.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A SERVOPACK fault occurred.
Restart the SERVOPACK several
times. If the alarm still occurs, the
SERVOPACK may be faulty.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A.021:
Parameter error 2
The software version of SERVO-
PACK that caused the alarm is
older than that of the written
parameter.
Check if the set software version
agrees with that of the SERVO-
PACK. If not, an alarm may occur.
Write the parameter of another
SERVOPACK of the same model
with the same software version.
Restart the SERVOPACK.
A SERVOPACK fault occurred.
−
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A.022:
Parameter error 3
The power supply went OFF
while setting a utility function.
Check the circumstances when the
power supply went OFF.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A SERVOPACK fault occurred.
Restart the SERVOPACK several
times. If the alarm still occurs, the
SERVOPACK may be faulty.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A.023:
Parameter error 4
The power board is not con-
nected.
−
Make sure the control board and
power board are mounted properly.
A SERVOPACK fault occurred.
−
Replace the SERVOPACK.
A.030:
Main Circuit Detector
Error
A SERVOPACK fault occurred.
−
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A.040:
Parameter Setting
Error 1
(The parameter setting
was out of the setting
range.)
The SERVOPACK and servomo-
tor capacities do not match each
other.
Check the combination of SERVO-
PACK and servomotor capacities.
Select the proper combination of
SERVOPACK and servomotor
capacities.
A SERVOPACK fault occurred.
−
The SERVOPACK may be faulty.
Replace the SERVOPACK.
The parameter setting is out of
the setting range.
Check the setting ranges of the
parameters that have been changed.
Set the parameter to a value within
the setting range.
The electronic gear ratio is out of
the setting range.
Make sure the gear ratio satisfies
the following conditions: 0.001 <
(PnA42/PnA44) < 4,000.
Set the gear ratio so that it satisfies
the following conditions: 0.001 <
(PnA42/PnA44) < 4,000.