Lincoln Electric IM586 STT-10 Head & Controls - Manual (Page 35)

E-4 TROUBLESHOOTING E-4
STT-10
Observe all Safety Guidelines detailed throughout this manual
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
CAUTION
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
Gas purge key does not operate the
gas solenoid, but gas flow does
occur while welding.
Pressing the current key does not
select between the peak and back-
ground current LEDʼs.
Pressing the procedure key does
not select between A - Remote - B.
Pressing the range key has no
effect while not welding.
Gas solenoid not operating properly
or intermittent.
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. One of the range selection LEDʼs
is lit or in acceleration setting
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 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 or range lockout
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. Inlet gas pressure exceeding 80
psi(5.5 bar). Verify that gas pres-
sure regulator is operating prop-
erly.
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
Contact your local Lincoln
Authorized Field Service Facility.