YASKAWA UAK series User Manual page 273

Alarm:
Alarm Name
• For 200-VAC power regenera-
tion converter:
The power supply was in the
range between 50 V to 125 V.
A.41B:
• For 400-VAC power regenera-
Converter AC
tion converter:
Undervoltage
The power supply was in the
(The AC voltage inside
range between 100 V to 250 V.
the power regeneration
converter is low.)
Power regeneration converter
failure
A power failure occurred.
The AC power supply was dis-
connected by the main circuit
contactor.
The AC voltage is unstable dur-
ing the operation.
A.41C:
• For 200-VAC power regenera-
Power Failure While
tion converter:
Motor Running
The power supply was 50 V
(The AC power supply
or less.
was cut off while the
• For 400-VAC power regenera-
motor was running.)
tion converter:
The power supply was 100 V
or less.
Power regeneration converter
failure
The main circuit cable is either
incorrectly wired or has a contact
fault.
The wiring of the main circuit DC
bus is incorrect.
An error occurred in the main cir-
A.42C:
cuit of the SERVOPACK con-
Converter Initial
nected to the converter.
Charging Error
(Charging of the main
circuit capacitor did not
finish within the speci-
Converter rapid discharge circuit
fied period of time.)
failure
The AC-DC conversion circuit
inside the power regeneration
converter has failed.
A.450: Main circuit capacitor failure
Main Circuit Capacitor
Overvoltage
An error occurred in the main cir-
(The capacitor of the
cuit detection circuit.
main circuit has deterio-
rated or is faulty.)
Cause Investigative Actions
Measure the power supply voltage.
−
−
Check the main circuit contactor
and NFB.
Measure the power supply voltage.
−
Make sure the wiring is correct.
Check the wiring.
Separate the main circuit DC bus of
the SERVOPACK.
−
−
−
11.2 Alarm Displays
(cont'd)
Corrective Actions
Set AC power supply voltage within
the specified range.
If an alarm occurs after turning the
correct power ON, the power regen-
eration converter may be faulty.
Replace the power regeneration
converter.
Turn the power supply OFF and
then ON again.
Turn OFF the AC power supply and
then turn it ON again.
Set AC power supply voltage within
the specified range.
If an alarm occurs after turning the
correct power ON, the power regen-
eration converter may be faulty.
Replace the power regeneration
converter.
Correct the wiring.
Correct the wiring of the main cir-
cuit DC bus.
Separate the SERVOPACK and
then turn ON the power supply
again. If an alarm does not occur,
the SERVOPACK may be faulty.
Replace the SERVOPACK.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the power regeneration con-
verter may be faulty. Replace the
power regeneration converter.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the power regeneration con-
verter may be faulty. Replace the
power regeneration converter.
Turn the power supply OFF and
then ON again. If the alarm still
occurs, the power regeneration con-
verter may be faulty. Replace the
power regeneration converter.
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