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TROUBLESHOOTING & REPAIR
F-9 F-9
POWER WAVE 450
TROUBLESHOOTING GUIDE Observe Safety Guidelines
detailed in the beginning of this manual.
CAUTION
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
faulty. Replace.
4. The shunt board assembly may
be faulty. Replace.
5. Perform the Switch Board
Test.