11.2 Alarm Displays
11-15
Inspection, Maintenance, and
Troubleshooting
1
1
A.10A:
Converter Overcurrent
(An overcurrent flowed
through the power tran-
sistor inside the power
regeneration converter.)
A mistake occurred when select-
ing the power regeneration con-
verter capacity.
Check the power regeneration con-
verter capacity and the total output
capacity of the SERVOPACK.
Change the power regeneration con-
verter capacity.
An unmatched AC reactor is
used.
−
Use the specified AC reactor.
The main circuit cable is either
incorrectly wired or has a contact
fault.
Make sure the wiring is correct.
Correct the wiring.
A short-circuit or ground fault
occurred in the main circuit
cable.
Check for short-circuits across
phase R, S, and T of the cable, or
between the ground and phase R, S,
or T.
The cable may have short-cir-
cuited. Replace the cable.
A short-circuit or ground fault
occurred in the power regenera-
tion converter.
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.
The power regeneration converter
may be faulty. Replace the power
regeneration converter.
Malfunction caused by noise.
Improve the noise environment,
including the wiring and installa-
tion, and check to see if the alarm
occurs again.
Take measures against noise, such
as wiring the FG correctly. Match
the FG wire size with the SERVO-
PACK main circuit wire size.
A short-circuit or ground fault
occurred in the AC reactor.
−
The AC reactor may be faulty.
Replace the AC reactor.
Power regeneration converter
failure
−
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.
A.11A:
Converter Ground
Fault
(A ground fault
occurred.)
Ground fault of motor cable
Check for short-circuits between the
cable phase-U, -V, and -W and the
grounding.
The cable may be faulty. Replace
the cable.
Ground fault inside the motor
Check for short-circuits between the
motor terminals U, V, and W and
the grounding.
The motor may be faulty. Replace
the motor
Ground fault of main circuit in
the SERVOPACK
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.
The SERVOPACK may be faulty.
Replace the SERVOPACK.
Ground fault of main circuit in
the power regeneration converter
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.
The power regeneration converter
may be faulty. Replace the power
regeneration converter.
Power regeneration converter
failure
Turn the control power ON and
check if an alarm occurs.
If an alarm occurs after turning the
control power ON, the power regen-
eration converter may be faulty.
Replace the power regeneration
converter.
A.22A:
Converter Fuse
Blowout
(The fuse of the main
power supply inside the
power regeneration con-
verter is blown out.)
The fuse of the main power sup-
ply inside the power regeneration
converter is blown out.
−
Replace the power regeneration
converter.
(cont’d)
Alarm:
Alarm Name
Cause
Investigative Actions
Corrective Actions
