Machine has no output – no display – fans run, Troubleshooting & repair, Caution – Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B User Manual

Page 68

TROUBLESHOOTING & REPAIR

F-8

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

Machine has no output – no fans
– no display. Main input fuses are
open indicating excessive input
current draw.

1. Check for proper input voltage

connections.

2. Make certain the reconnect

panel is configured properly for
the applied voltage.

3. Replace the input fuses with

proper size and ratings.

1. Perform the Input Power and

Wiring Harness Test.

2. Perform the Input Rectifier

Test.

3. Perform the Reconnect

Switch Test #1.

4. Perform the Switch Board

Test.

5. Perform the Snubber and

Bleeder Resistor Test.

Machine has no output – no dis-
play – fans run.

1. Check circuit breaker (5 amp)

located on the front panel.
Reset if necessary.

1. Perform the Auxiliary

Transformer Test #1.

2. Perform the Internal and

Auxiliary Supply Voltage Test.

Machine has no output – fans run
- Display flashes On and Off
repeatedly.

1. Check for loose or faulty con-

nections at the Power P.C.
Board. See Wiring Diagram.

1. Replace the Power P.C. Board.