Lincoln Electric STT-10 HEAD & CONTROLS BOOM MOUNT OR BENCH MODELS IM586-B Operator's Manual page 36

E-5
PROBLEMS
(SYMPTOMS)
Pressing the trigger key has no
effect while not welding.
Pressing the control key has no
effect while not welding.
One of the knobs changes the dis-
play, but the other doesnʼt.
Neither knob changes the display.
Displays & LEDʼs on keypad are
off. The green and red LEDʼs on the
control p.c. board are off.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
TROUBLESHOOTING
Observe all Safety Guidelines detailed throughout this manual
POSSIBLE
1. The connector from the control
p.c. board to the display p.c.
board or the connector from the
display p.c. board to the keypad
are loose or improperly inserted.
2. Damaged keypad
3. Damaged display p.c. board.
4. Damaged control p.c. board.
1. Make sure that the DIP switches
on the control p.c. board are not
set for security mode.
2. The connector from the control
p.c. board to the display p.c.
board or the connector from the
display p.c. board to the keypad
are loose or improperly inserted.
3. Damaged keypad
4. Damaged display p.c. board.
5. Damaged control p.c. board.
1. The display is in a mode that can
only use one encoder.
2. The connector from the control
p.c. board to the encoder p.c.
boards may be loose or improp-
erly inserted.
3. Damaged encoder p.c. board.
4. Damaged control p.c. board.
1. The connector from the control
p.c. board to the encoder p.c.
boards may be loose or improp-
erly inserted.
2. Damaged control p.c. board.
3. Damaged encoder p.c. boards.
1. Power source is off.
2. Power source supply is not sup-
plying 42 VAC to the wire feeder
control box.
3. Damaged input power wiring in
the LN-10 control box.
4. Damaged control p.c. board.
CAUSE
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
Contact your local Lincoln
Authorized Field Service Facility.
CAUTION
STT-10
RECOMMENDED
COURSE OF ACTION
E-5