Troubleshooting and repair, Caution – Lincoln Electric POWER MIG 11521 User Manual

Page 44

Advertising

OUTPUT PROBLEMS

Observe Safety Guidelines detailed in the beginning of this manual.

PROBLEMS

(SYMPTOMS)

POSSIBLE AREAS OF

MISADJUSTMENT(S)

RECOMMENDED

COURSE OF ACTION

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

Output voltage and wire feed speed
is present when the gun trigger is
NOT activated.

1. Remove the gun assembly. If the

problem is resolved, the gun
assembly is faulty. Repair or
replace. If the problem is NOT
resolved, the fault is within the
Power MIG® 215XT machine.

1. Check for “shorts” in the trigger

circuitry within the Power MIG®
215XT machine. See the
Wiring Diagram.

2. The control board may be faulty.

The machines output is low. Welds
are “cold”. The weld beads are
rounded or “humped” demonstrat-
ing poor wetting into the plate. The
machine cannot obtain full rated
output of 200 amps at 22VDC.

1. Check the input voltage. Make

sure the machine is configured
properly for the input voltage
being applied.

2. Make sure the settings for wire

feed speed and voltage are cor-
rect for the process being used.

3. Make sure the electrode polarity

is correct for the process being
used.

4. Check the welding cables and

gun for loose or faulty connec-
tions.

1. Check for loose or faulty con-

nections on the heavy current
carrying leads inside the Power
MIG® 215XT. See the Wiring
Diagram.

2. The output capacitors may be

faulty. Check for loose connec-
tions at the capacitors. Also
check for leaky capacitors.
Replace if necessary.