AL-1318 (OVERVOLTAGE (CONVERTER))
An alarm
occurs.
The regenerative energy at deceleration of the motor speed is too
large to be controlled by the regeneration circuit of the
SERVOPACK.
Before checking the wiring
connections, turn OFF the
control power supply.
Use a tester to confirm that
all the LEDs on the
SERVOPACK and
converter are unlit and that
no charged electricity
remains.
(It may take a few minutes
until all the electricity is
discharged.)
Does the alarm occur
when the servo is OFF?
YesNo
Remove connector CN30 on the
WRCA01 circuit board and re-insert it.
(See Fig. 3.)
Alarm?
Yes No
Remove connector CN1 on the
converter and re-insert it. (See Fig. 3.)
Alarm?
Yes No
Continue normal
operation.
Replace the converter.
Alarm?
NoYes
Change the primary voltage of the
breaker to the specified voltage.
Alarm?
YesNo
Converter SERVOPACK
CN30
CN1
Fig. 3
Is the primary voltage of the
breaker 200 V (+10% to 15%)?
Yes No
Is the regenerative resistor
disconnected? (Disconnect the
cable for the B1 and B2 terminals
of the converter to measure the
resistance.) (See Fig. 4.)
Yes
No
Continue normal
operation.
Replace the regenerative resistor.
Alarm?
Yes No
Continue normal
operation.
Replace the converter.
Alarm?
NoYes
Contact your Yaskawa
representative.
Continue normal
operation.
Replace the WRCA01 circuit board.
Alarm?
NoYes
Converter
L1 L2 L3 B1 B2
Regenerative
resistor
Tester
(Measure the
resistance.)
Fig. 4
Contact your Yaskawa
representative.
Replace the WRCA01 circuit board.
Alarm?
No
Yes
Continue normal
operation.
Reduce the teaching speed 30% in
the four steps before and after the
step where the alarm occurs.
Alarm?
Yes No
The robot is overloaded. Reduce the
load.
Alarm?
NoYes
Continue normal
operation.
CAUTION
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