Troubleshooting and repair, Caution – Lincoln Electric VANTAGE SVM178-B Manuel d'utilisation
Page 194
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
The machine has welding output
but no control of output. The auxil-
iary power is normal.
1. If a remote control unit is con-
nected to the machine, check
the remote control and related
cable.
2. Check the welding and work
cables for loose or faulty con-
nections.
1. Check the OUTPUT control
potentiometer and related
leads. See the Wiring
Diagram.
2. Check the shunt and associat-
ed feedback leads. See the
Wiring Diagram.
3. Check the voltage feedback
leads for loose or faulty con-
nections. See the Wiring
Diagram.
4. Perform the Chopper Module
5. The Weld Control PC board
may be faulty.
6. Pull coil board may be faulty.
Except tier II Cummins code
11181.
The machine has low welding out-
put and low auxiliary output
1. Check the brushes for wear and
proper contact to the slip rings.
2. The engine RPM may be low.
1. If the engine high idle speed is
low, perform the Throttle Ad -
just ment Test.
2. Perform the Rotor Resistance
3. Perform the Flashing and
Rotor Voltage Test. If the rotor
voltage is low, the field capaci-
tor or field bridge may be faulty.
Test and replace if necessary.
See the Wiring Diagram.
4. If the engine high idle RPM is
OK, then the engine may have
lost horsepower and be in need
of major repair.
5. Tier II Cummins - See EGC test
and adjustment.
TROUBLESHOOTING AND REPAIR
F-6
F-6
VANTAGE® 500