If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
216-383-2531 or 1-800-833-9353.

PROBLEMS
(SYMPTOMS)

POSSIBLE AREAS OF
MISADJUSTMENT(S)

RECOMMENDED
COURSE OF ACTION

OUTPUT PROBLEMS

The machine has high welding out-
put and no control.

The machine has minimum (or very
low) welding output and no control.

1. If remote control is being used,

set the Output Control Switch
(S2) to the “Machine or Local”
position and control the weld
output with the machine Output
Control (R4). If the problem is
solved, check the remote con-
trol unit or wire feeder and asso-
ciated control cable.

2. Check the remote control leads

for “grounds” to the negative
welding output.

If leads #75,

#76 or #77 are “grounded” to the
negative welding output, the
machine output may go very
high without control.

1. If remote control is being used,

2. Make certain the remote control

leads (#75, #76, #77) are not
grounded to the positive welding
output.

3. Make certain the three-phase

input voltage is correct and
matches the machine rating and
the reconnect panel.

1. Check the Output Control switch

(S2) and associated wiring. See
the Wiring Diagram.

2. Check feedback leads #220,