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 1-
800-833-9353.

PROBLEMS
(SYMPTOMS)

POSSIBLE AREAS OF
MISADJUSTMENT(S)

RECOMMENDED
COURSE OF ACTION

OUTPUT PROBLEMS

Circuit breaker (5 amp) trips when
gun trigger is pulled – fans run.

1. Make sure that not more than

5 amps of auxiliary power are
being used.

2. Remove the wire feeder’s con-

trol cable(s) from the Power
Wave. If the symptoms disap-
pear, replace the wire feeder
and cables with known good
equipment. If the problem is
solved, the wire feeder or con-
trol cable is faulty.

1. The 5 amp circuit breaker may

be faulty. Test or replace.

2. Perform the Trigger Circuit

and Wiring Harness Test.

The machine intermittently loses
output. The wire feeder still feeds
wire.

1. If after a few seconds the con-

tactor “pulls” back in, then
check for high input line
voltage.

1. Perform the Static Capacitor

Balance Test.

2. Perform the Welding

Feedback Test.

3. The control board may be