Symptoms, Major physical or electrical damage is evident, Troubleshooting and repair – Lincoln Electric VANTAGE SVM178-B Manuel d'utilisation

Page 192: Caution

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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

Major physical or electrical damage
is evident.

1. Contact your local Lincoln

Authorized

Field

Service

Facility.

1. Contact the Lincoln Electric

Service Department at 1-888-
935-3877.

No welding output in neither Stick or
CV modes. The engine operates
normally. The auxiliary output is
normal

1. Place the Welding Terminals

Switch in the "ALWAYS ON"
position. If the problem is
solved, the fault may be in the
external control cable (if used),
leads #2 and #4. See the
Wiring Diagram.

2. With the engine at high idle

(1900RPM), the machine in the
Stick mode and the OUTPUT
CONTROL at maximum, check
for the presence of approxi-
mately 87VDC (open circuit volt-
age) at the output terminals.

3. If the correct OCV is present at

the welding output terminals
check the welding cables,
clamps and electrode holder for
loose or faulty connections.

1. Check for loose or faulty con-

nections on the heavy current
carrying leads between the out-
put bridge, the power modules,
the choke and the output termi-
nals.

2. Check the Welding Terminals

Switch and associated leads.
See the Wiring Diagram.

3. Check gate leads #23, #23A,

#25 and #25A for loose or faulty
connections. See the Wiring
Diagram.

4. Perform the Stator Voltage

Test.

5. Perform the Output Rectifier

Bridge Test.