YASKAWA UAK series User Manual page 269

Alarm:
Alarm Name
A mistake occurred when select-
ing the power regeneration con-
verter capacity.
An unmatched AC reactor is
used.
The main circuit cable is either
incorrectly wired or has a contact
fault.
A short-circuit or ground fault
occurred in the main circuit
cable.
A.10A:
Converter Overcurrent
(An overcurrent flowed
A short-circuit or ground fault
through the power tran-
occurred in the power regenera-
sistor inside the power
tion converter.
regeneration converter.)
Malfunction caused by noise.
A short-circuit or ground fault
occurred in the AC reactor.
Power regeneration converter
failure
Ground fault of motor cable
Ground fault inside the motor
Ground fault of main circuit in
A.11A:
the SERVOPACK
Converter Ground
Fault
(A ground fault
occurred.)
Ground fault of main circuit in
the power regeneration converter
Power regeneration converter
failure
A.22A:
Converter Fuse
Blowout The fuse of the main power sup-
ply inside the power regeneration
(The fuse of the main
converter is blown out.
power supply inside the
power regeneration con-
verter is blown out.)
Cause Investigative Actions
Check the power regeneration con-
verter capacity and the total output
capacity of the SERVOPACK.
−
Make sure the wiring is correct.
Check for short-circuits across
phase R, S, and T of the cable, or
between the ground and phase R, S,
or T.
Check for short-circuits across
phase R, S, and T of the main circuit
power supply connection terminal
of the power regeneration converter,
or between the ground and phase R,
S, or T.
Improve the noise environment,
including the wiring and installa-
tion, and check to see if the alarm
occurs again.
−
−
Check for short-circuits between the
cable phase-U, -V, and -W and the
grounding.
Check for short-circuits between the
motor terminals U, V, and W and
the grounding.
Check for short-circuits between the
motor connection terminals U, V,
and W on the SERVOPACK and the
grounding, or between terminals P
and N and the grounding.
Check for short-circuits between the
power connection terminals L1, L2,
and L3 on the power regeneration
converter and the grounding, or
between terminals P and N and the
grounding.
Turn the control power ON and
check if an alarm occurs.
−
11.2 Alarm Displays
(cont'd)
Corrective Actions
Change the power regeneration con-
verter capacity.
Use the specified AC reactor.
Correct the wiring.
The cable may have short-cir-
cuited. Replace the cable.
The power regeneration converter
may be faulty. Replace the power
regeneration converter.
Take measures against noise, such
as wiring the FG correctly. Match
the FG wire size with the SERVO-
PACK main circuit wire size.
The AC reactor may be faulty.
Replace the AC reactor.
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.
The cable may be faulty. Replace
the cable.
The motor may be faulty. Replace
the motor
The SERVOPACK may be faulty.
Replace the SERVOPACK.
The power regeneration converter
may be faulty. Replace the power
regeneration converter.
If an alarm occurs after turning the
control power ON, the power regen-
eration converter may be faulty.
Replace the power regeneration
converter.
Replace the power regeneration
converter.
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