Lincoln Electric IM586 STT-10 Head & Controls - Manual (Page 37)

E-6 TROUBLESHOOTING E-6
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
Displays & LEDʼs on keypad are
off. The green and red LEDʼs on the
control p.c. board are both blinking
at about one second intervals.
Displays & LEDʼs on keypad are
off. The green or red LED on the
control p.c. board is blinking at a
very fast or erratic rate.
Dual procedure switch is not func-
tioning at the gun.
Wire feed speed is consistent and
adjustable, but operates at the
wrong speed.
ʻErʼ is displayed on power up.
ʻGLPʼ is displayed.
The knobs do not control the com-
plete range of wire feed speed,
peak current, or background cur-
rent.
1. The connectors from the control
p.c. board to the display p.c.
board are loose or improperly
inserted.
2. Damaged display p.c. board.
3. Damaged control p.c. board.
1. Damaged control p.c. board.
1.STT-10 control not properly set
for using a dual procedure switch
at the gun
2. Disconnected or damaged wiring
between the wire drive and con-
trol box.
3. Damaged wiring in the STT-10
wire drive.
4. Damaged wiring in the STT-10
control box.
5. Damaged control p.c. board.
1. DIP switch S1 is incorrectly set
for the wrong wire drive or gear
ratio.
2. Damaged control p.c. board.
1. EEPROM error detected.
2. Damaged control p.c. board.
1. Ground Loop Protection fault
occurred.
2. GLP reed switch failure.
3. Damaged control p.c. board.
1. Ranges are set for wire feed
speed, peak current, or back-
ground current.
2. DIP switch is incorrectly set for
the wrong wire drive or gear
ratio.
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
Contact your local Lincoln
Authorized Field Service Facility.