Troubleshooting & repair, Caution – Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B User Manual

Page 73

TROUBLESHOOTING & REPAIR

F-13

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

FUNCTION PROBLEMS

The display cannot be seen clear-
ly or cannot be seen at all.

1. Adjust the viewing angle of the

display. Follow the instructions
provided in the Operation
Section of this manual. (Look
under the “LCD DISPLAY
ADJUSTMENTS” in the “CON-
TROLS AND SETTINGS” sub-
section of the Operation
Section.)

1. Perform the LCD Display Test.

Machine does not respond to
keys being pressed, or the
machine has improper displays.

1. Each time an overlay is

changed, make certain that the
machine is powered-up with
the new overlay in place.

2. Make certain that the correct

overlay ID number is displayed
on power-up. Refer to the
Operation Section of this
manual for the overlay descrip-
tion.

3. In some cases, some of the

keys on the overlay may be
locked out. Refer to the
Operation Section of this
manual for the overlay descrip-
tions.

1. Using the test and calibration

overlay L9660-255, perform
the keyboard/LED test. See
overlay.

2. Perform the Serial Loop

Wiring Harness Test.