Lincoln Electric Cross Country 300 Service Manual page 21

LINCOLN ELECTRIC
Observe Safety Guidelines
detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
The weld output cannot be
adjusted with the front panel
output control knob in one or
more weld modes. The weld
output terminals have normal
OCV (open circuit voltage). The
AC auxiliary power is normal
and the engine operates
normally.
The machine front panel output
control is still active when the
remote control unit is
connected to the 6-pin
Amphenol.
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the
Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
POSSIBLE AREAS OF
MISADJUSTMENT(S)
FUNCTION PROBLEMS
1. Remote control devices
completely disable the front
output in all modes except
'TOUCH START TIG' mode.
*Make sure there is nothing
plugged into the Amphenol
receptacles.
2. Check for dirt or moisture
contamination in 6-pin remote
receptacle.
1. This condition is normal in
the 'TOUCH START TIG' mode.
See the operators manual.
2. The remote control unit may
be defective.
3. Check the Amphenol
receptacles. Look for damaged
or corroded contact pins in the
receptacle and in the plug of
the remote control unit.
CAUTION
Cross Country™ 300 Service Manual
TROUBLESHOOTING GUIDE
RECOMMENDED
COURSE OF ACTION
1. The output control
potentiometer may be
defective. Perform the Remote
Receptacle Test Procedure.
2. Perform the Weld Mode
Selector Switch Test Procedure.
3. Check the shunt and
associated leads and the
voltage feedback leads for
loose or faulty connections.
See Wiring Diagram.
4. The weld control PC board
may be faulty.
1. Check connector J1 on the
weld control board to see that
it is properly seated and the
pins in both the plug and the
board receptacle are in good
condition.
2. Check plug J1 for continuity
between the J1 connector and
the Amphenol connector. See
Wiring Diagram.
3. Perform the Remote
Receptacle Test Procedure.
4. The weld control board may
be defective.
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