Troubleshooting & repair, Caution – Lincoln Electric VANTAGE 400 User Manual
Page 58
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-10
F-10
VANTAGE® 400
The machine front panel output
control is still active when the
remote control unit is connected to
one of the Front Panel Amphenols.
This condition is normal in the
“TOUCH START TIG MODE”. See
the operators manual.
The remote control unit may be
defective.
Check the Amphenol receptacles.
Look for damage or corroded con-
tact pins in the receptacle and in
the plug of the remote control unit.
Check plug #P1 on the control
P.C. Board. Plug should be prop-
erly seated and the pins in both
the plug and the P.C. Board jack
must be clean and fit tightly
together.
There may be a poor connection
between the weld control P.C.
Board and the amphenol recepta-
cles. Check for continuity between
the following terminals. See
Wiring Diagram and Control Inner-
Connection Diagram.
P1-10 to 6 pin amphenol pin “C”
and to pin 14 amphenol pin “G”.
P-1-11 to 6 pin amphenol pin “A”
and to 14 pin amphenol pin “E”.
P-1-14 to 6 pin amphenol pin “B”
and to 14 pin amphenol pin “F”.
The weld control P.C. Board may
be defective.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
ENGINE PROBLEMS
The weld output can not be adjust-
ed with the front panel output con-
trol knob in one or mode weld
modes. The weld output terminals
have normal OCV (open circuit
voltage). The AC auxiliary power
is normal and the engine operated
normally.
Remote control devices completely
disables the front output in all
modes except touch start TIG
mode. Make sure there is nothing
plugged into the Amphenol recep-
tacles.
Check for dirt or moisture contami-
nation in either the 6 pin or the 14
pin amphenol.
Perform the REMOTE RECEPTA-
CLE RESISTANCE TEST.
The output control potentiometer
may be defective. Perform the
CONTROL POTENTIOMETER
AND MODE SWITCH RESIS-
TANCE TEST.
The WELD CONTROL BOARD
may be faulty.
See the Start-Up and OCV diag-
nostic chart.