YASKAWA YWE-EH500-6N0 Instruction Manual page 79

HW0480311
Table. 13 Fault Analyses for Electrical Circuit Section
No. Failure
Welding voltage (welding voltage
6 command) cannot be changed
from the robot side.
Error indication on the digital
7
meter
The power supply switch is
tripped and the power is not
8
turned ON.
Shielding gas cannot be adjusted
or stopped.
9
The starting point detection can-
not be detected.
10
9.3 Cause and Remedy of Failure at Electrical Circuit Section
Cause
The analog command sent
from the robot side is not nor-
mal.
See " Table. 5 List of Error
Display Contents ".
Damage to the input diode
Damage to the main circuit
transistor (IGBT)
Failure of the gas solenoid
valve
Fuse (10 A) on the board
Pr(SD)-006 blown
Failure of the printed board
(SD)-006
The printed board (SD)-004
is installed by mistake.
(The printed board (SD)-004
cannot be used.)
The starting point detection
command is not sent to the
welding source or the power
supply for starting point I/F is
not supplied to the welding
source.
The starting point detection
signal is not sent from the
welding source.
9-7
Remedy
Check the analog com-
mand output on the robot
side.
See " Table. 5 List of
Error Display Contents ".
Contact your Yaskawa
representative.
Investigate the gas sys-
tem.
Upon investigating the
error cause, replace the
fuse (10 A) on the printed
board Pr(SD)-006.
Check or replace the
printed board (SD)-006.
Replace the board with
the printed board (SD)-
006.
Check the connection
signal cable.
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