Al-1320 (Open Phase (Converter)) - YASKAWA Motoman UP6 Instructions Manual

AL-1320 (OPEN PHASE (CONVERTER))

An open phase occurs at the converter input power supply.
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.)
Turn OFF the control power supply.
Is the contactor stuck?
(See Fig. 6.)
Yes
Replace the contactor.
Yes
Replace the converter.
Yes
Replace the WRCA01 circuit board.
Yes
Contact your Yaskawa
representative.
Are the breaker's primary voltages
at R, S, and T all 200 V (+10% to
15%)?
Yes
No
Alarm?
No
Alarm?
No
Alarm?
No
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
No
Change the breaker's primary voltage
to the specified voltage.
Alarm?
Yes
Continue normal
operation.
After turning OFF the non-fuse breaker, measure the
resistance between the non-fuse breaker's secondary
terminals and the converter's input power supply
terminals to confirm that all are open.
Measure the resistance between r and L1, s and L2,
and t and L3.
40
Yes
Replace the WRCA01 circuit board.
Alarm?
Yes
Contact your Yaskawa
representative.
No
Continue normal
operation.
Non-fuse
breaker
R S T
Tester
(Measure the
resistance.)
r s t
Converter
L1 L2 L3 B1 B2
Fig. 6
No