Troubleshooting & repair, Caution – Lincoln Electric VANTAGE 400 User Manual
Page 60
Observe Safety Guidelines detailed in the beginning of this manual.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely,
contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed.
Call 1-888-935-3877.
CAUTION
TROUBLESHOOTING & REPAIR
F-12
F-12
VANTAGE® 400
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
WELDING PROBLEMS
The machine welds normally in all
modes and the range of weld out-
put seems normal, but one or both
of the front panel displays is blank,
incorrect welding value, or dis-
plays parts of numbers.
It is normal for one of the displays
to be off when there is no load
across the weld output terminals.
In “CV” - mode only the “VOLTS”
display will be illuminated, in all
other modes only the “AMPS” dis-
play will be illuminated.
When welding both displays
should be reading actual welding
parameters.
Both the “AMPS” and “VOLTS”
displays use the same part num-
bered display unit. If one of the
digital displays appears to be func-
tioning normally, it can be used to
test the weld control P.C. Board
output to the malfunctioning dis-
play.
Swap the display board connec-
tors on the weld control board
(they are both the same), if the
good display functions normally in
bad displays place then the P.C.
Board is good and only the mal-
functioning display should be
replaced.
If the known good display still
malfunctions then the weld control
P.C. board is defective and should
be replaced.
A control cable type feeder does
not function when connected to
the 14 pin amphenol. Machine
operates normally in the “CC-
STICK” mode and has normal AC
auxiliary output.
Check the circuit breaker CB1 if
using a a120 Volt AC wire feeder.
Check CB8 if using a 42 VAC wire
feeder. Reset breaker in tripped.
Check the Amphenol receptacle
for damaged, corroded or dirty
contact pins.
The wire feeder control cable may
be defective.
The wire feeder may be defective.
Use a volt meter to check for the
presents of supply voltage at the
14 pin Amphenol receptacle. 120
Volt AC power supplied through
pins A and J, 421 VAC power is
supplied through pins I and K.
Perform the STATOR VOLTAGE
TEST.