Al-1321 (Overcurrent (Amp)) - YASKAWA Motoman UP6 Instructions Manual

AL-1321 (OVERCURRENT (AMP))

The current is more than the allowable maximum current for the
SERVOPACK, or the power transistor is overheated due to overloading.
CAUTION
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.)
Take a corrective measure to
prevent the axis from falling when
the servo is terned ON.
Turn ON the servo power supply with
2BC and 3BC base connectors
disconnected.
Alarm?
Yes
Is the grounding for the motor of the
axis where the alarm occurs correct?
Yes
Replace the motor.
Alarm
Yes
Continue normal
operation.
Contact your Yaskawa
representative.
Check for overheating
Turn OFF the control power supply
and wait 10 minutes.
Yes
Is there any ground fault?
(See Fig. 7.)
Yes
No
Protection against
the axis falling
After disconnecting the motor power cable
of the axis where the alarm occurred, turn
No ON the servo power supply.
Replace the power supply cable.
No
Contact your Yaskawa
representative.
No
Replace the internal cables.
Yes No
Continue normal
operation.
Alarm?
No
Continue normal
operation.
Disconnect CN29 on the
XIU01 unit.
Alarm?
No
Alarm?
Yes
Tester
(Measure the
resistance.)
With the S-axis, for example, disconnect all the motor power
cables of the S-axis from the terminal block. Measure the
resistance between E11 and U11, U12, V11, V12, W11, and
W12, and between E12 and U11, U12, V11, V12, W11, and
W12, to confirm that all the contacts are open.
41
An alarm occurs.
D o e s t h e a l a r m o c c u r
when the servo is OFF?
No Yes
Replace the WRCA01 circuit board.
Alarm?
Yes
Replace the SERVOPACK.
Alarm?
Yes
Contact your Yaskawa
representative.
Yes
Replace the SERVOPACK.
Yes
No
Contact your Yaskawa
representative.
Continue normal
operation.
SERVOPACK
E11 E12 U11 U12 V11 V12 W11 W12
Fig. 7
No
No
Continue normal
operation.
Alarm?
No
Continue normal
operation.