Troubleshooting & repair, Caution – Lincoln Electric COMMANDER SVM153-A User Manual
Page 64
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,
contact 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
ENGINE PROBLEMS
The engine will not go to high idle
when using the auxiliary power.
Auxiliary power is normal when the
IDLER switch is in the "HIGH" posi-
tion. Automatic idle function works
properly when the welding termi-
nals are loaded.
1. Make sure the auxiliary power
leads are tight.
2. The automatic idler may not
function if the auxiliary power is
loaded to less than 150 watts.
1.
Check the current sensing
toroid for loose or faulty connec-
tions. See the Wiring Diagram.
2. Make sure leads #3 and #6A
pass through the toroid twice in
opposite directions.
3. The current sensing toroid may
be faulty.
4. The Weld Control PC board
may be faulty.
The engine will not go to high idle
when attempting to weld or when
the auxiliary power is loaded.
Welding output and auxiliary power
outputs are normal when IDLER
switch is in the " HIGH" position.
1. Make sure the welding cables
and auxiliary power lead con-
nections are tight.
1. The Weld Control PC board
may be faulty.
2. The current sensing toroid may
be faulty.
The machine goes to low idle but
does not stay at low idle.
1. Make sure there is NOT an
external load (auxiliary or weld)
connected to the Commander
500.
1. The idler solenoid linkage may
be misadjusted or damaged.
2. The idler solenoid lead connec-
tions may be loose or damaged.
See the Wiring Diagram.
3. Perform the Idler Solenoid
4. The Weld Control PC board
may be faulty.
F-11
F-11
TROUBLESHOOTING & REPAIR
COMMANDER 500