YASKAWA UAK series User Manual page 293

Warning
Number:
Warning Name Cause
(Warning
Description)
A.930: The battery connection
is incorrect.
Absolute
Encoder Battery
The battery voltage is
Error
lower than the specified
(The absolute
value 2.7 V.
encoder battery
voltage is lower
than the specified
value.)
SERVOPACK failure
∗ Only when an
absolute encoder
is connected.
• For 200-VAC SER-
VOPACKs:
The AC power supply
voltage was in the
range between 125 V
and 170 V.
• For 400-VAC SER-
VOPACKs:
The AC power supply
voltage was in the
range between 250 V
A.971:
and 323 V.
Undervoltage
The power supply volt-
age dropped during
operation.
Occurrence of instanta-
neous power interrup-
tion.
SERVOPACK failure
The operating ambient
temperature is high.
The overload alarm has
been reset by turning
OFF the power too
many times.
Either the load is in
A.97D:
excess or operation is
Converter performed beyond the
power regeneration pro-
Heat Sink
cessing capacity.
Overheated
The installation orienta-
tion of the power regen-
eration converter is
incorrect or the dis-
tance from other equip-
ment is insufficient.
Power regeneration
converter failure
Investigative Actions
Check the battery connection.
Measure the battery voltage.
−
Measure the power supply voltage.
Measure the power supply voltage.
Measure the power supply voltage.
−
Check the operating ambient tempera-
ture using a thermometer.
−
−
Check the installation conditions of
the power regeneration converter.
−
11.3 Warning Displays
(cont'd)
Corrective Actions
Reconnect the battery.
Replace the battery.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Set the power supply voltage within
the specified range.
Increase the power supply capacity.
Improve the power supply conditions.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Improve the installation conditions of
the power regeneration converter and
reduce the operating ambient tempera-
ture.
Remove the cause of the overload
alarm.
Review the load and operation condi-
tions.
Install the power regeneration con-
verter correctly as specified.
The power regeneration converter
may be faulty. Replace the power
regeneration converter.
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