Lincoln Electric CLASSICII SVM125-A Service Manual page 59

F-9
TROUBLESHOOTING GUIDE
PROBLEMS
(SYMPTOMS)
The engine will NOT go to high
speed when a load is applied to the
welding output terminals.
engine does go to high speed when
a load is applied to the AC auxiliary
power receptacles.
The engine will NOT go to high
speed when a load is applied to the
AC auxiliary receptacles.
engine does go to high speed when
a load is applied to the welding out-
put terminals.
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
216-383-2531 or 1-800-833-9353.
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
FUNCTION PROBLEMS
1. Check welding cables for loose
or faulty connections.
The
1. Check the auxiliary power plug
and associated leads for loose
The or faulty connections.
2. The load may be too small. The
load must be above 150 watts.
CAUTION
CLASSIC II
Observe Safety Guidelines
detailed in the beginning of this manual.
RECOMMENDED
COURSE OF ACTION
1. Check the reed switch (CR2) for
proper operation.
switch should close when there
is current flow in the welding cir-
cuit.
2. Locate the red lead connected
to the Idler PC board.
leaving the red lead connected,
jumper the red lead to frame
ground. If the engine goes to
high speed, the fault is in the
reed switch or associated leads.
3. If the engine does NOT go to
high speed (in step 2), the Idler
PC board may be faulty.
1. Check the leads associated with
the current transformer for loose
or faulty connections. See the
Wiring Diagram.
2. Check the current transformer
for "opens" in the windings.
3. The Idler PC board may be
faulty.
F-9
The reed
While