Troubleshooting and repair, Caution – Lincoln Electric CLASSIC SVM194-A Manuel d'utilisation
Page 127
OUTPUT PROBLEMS
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely,
contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed.
Call 1-888-935-3877.
CAUTION
There is no, or very low weld
output voltage. The auxiliary
output is normal.
Check that the remote/local
switch (If so equipped) is
positioned correctly.
If a remote current control is
being used, try switching to
local control. The remote
current control may be faulty.
Check all leads and cables for
damaged or poor connections.
Perform the Welding
Service Procedure.
Perform the Shunt Field Coil
Test.
Perform the Shunt Field
Circuit Voltage Test.
Check for damaged or poor
connections at the brush
holders, series and interpole
coils, weld output terminals,
and all the conductors
connecting these components.
The Armature may be faulty.
There is no auxiliary voltage,
weld output is normal.
Check that the auxiliary power
circuit breakers are not tripped.
If the machine is equipped with
a ground fault circuit
interrupter (GFCI), it may be
tripped.
NOTE: GFCIs will not reliably
reset, unless engine is
operating at high idle
RPM.
Check all leads and cables for
damaged or poor connections.
Check for auxiliary voltage at
the receptacle input terminals,
if normal voltage is present,
replace receptacle.
Check for auxiliary voltage at
the connections closest to the
exciter stator windings. See
wiring diagram.
• If normal voltage is present,
check the wiring and circuit
breakers between the test
points and the receptacle.
Repair or replace any defective
parts or wiring.
• If normal voltage is not
present, check for damaged
conductors between the test
points and the winding. If the
conductors are good, the stator
is defective.
TROUBLESHOOTING AND REPAIR
F-5
F-5
CLASSIC® 300D & 300G