YASKAWA CACP-JU series, User Manual

Page: 277 / 340

11.2 Alarm Displays
11-23
Inspection, Maintenance, and
Troubleshooting
1 1
A.7BA:
Converter Heat Sink
Overheated
(The temperature of the
heat sink inside the
power regeneration con-
verter exceeded 100
°
C,
or the thermistor in the
converter was discon-
nected or damaged.)
The operating ambient tempera-
ture is high. Check the operating ambient tem-
perature using a thermometer.
Improve the installation conditions
of the power regeneration converter
and reduce the operating ambient
temperature.
The overload alarm has been
reset by turning OFF the power
too many times.
−
Remove the cause of the overload
alarm.
Either the load is in excess or
operation is performed beyond
the power regeneration process-
ing capacity.
−
Review the load and operation con-
ditions.
The installation orientation of the
power regeneration converter is
incorrect or the distance from
other equipment is insufficient.
Check the installation conditions of
the power regeneration converter. Install the power regeneration con-
verter correctly as specified.
Power regeneration converter
failure
−
The power regeneration converter
may be faulty. Replace the power
regeneration converter.
The heat sink cooling fan in the
ventilation duct stopped or the
fan in the base mounting unit
stopped.
Make sure that there is no foreign
matter in the fans. Remove the foreign matter. Or
replace the fan.
A.810:
Encoder Backup Error
(Detected on the
encoder.)
(Only when an absolute
encoder is connected.)
Alarm occurred when the power
to the absolute encoder was ini-
tially turned ON.
Check to see if the power was
turned ON initially.
Set up the encoder.
The encoder cable disconnected,
and connected again. Check to see if the power was
turned ON initially. Confirm the connection and set up
the encoder.
The power from both the control
power supply (+5 V) and the bat-
tery power supply from the SER-
VOPACK is not being supplied.
Check the encoder connector bat-
tery or the connector contact status.
Replace the battery or take similar
measures to supply power to the
encoder, and set up the encoder.
Absolute encoder failure
−
If the alarm cannot be reset by set-
ting up the encoder again, replace
the servomotor.
SERVOPACK failure
−
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A.820:
Encoder Checksum
Error
(Detected on the
encoder.)
Encoder failure
−
Set up the encoder again. If the
alarm still occurs, the servomotor
may be faulty. Replace the servo-
motor.
SERVOPACK failure
−
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A.830:
Absolute Encoder
Battery Error
(The absolute encoder
battery voltage is lower
than the specified value.)
The battery connection is incor-
rect.
Check the battery connection. Reconnect the battery.
The battery voltage is lower than
the specified value 2.7 V.
Measure the battery voltage. Replace the battery.
SERVOPACK failure
−
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Encoder failure
−
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the servomotor may be
faulty. Replace the servomotor.
(cont’d)
Alarm:
Alarm Name
Cause Investigative Actions Corrective Actions