Lincoln Electric VANTAGE 520 SD Operator's Manual page 46

VANTAGE ® 520 SD
Observe all Safety Guidelines detailed throughout this manual
PROBLEMS
(SYMPTOMS)
Engine goes to low idle but does not
stay at low idle.
No welding output or auxiliary out-
put.
Welder has some/ no output and no
control. Auxiliary output OK
No welding output. Auxiliary output
OK.
No auxiliary power.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Lincoln Authorized Service Facility for technical troubleshooting assistance before you proceed.
WWW.LINCOLNELECTRIC.COM/LOCATOR
POSSIBLE
CAUSE
FUNCTION PROBLEMS
1. Faulty Weld Control PCB or Idler
relay.
1. Broken lead in rotor circuit.
2. Faulty field diode module.
3. Faulty Weld Control PCB.
4. Faulty rotor.
1. Faulty remote kit.
2. Faulty output control
potentiometer.
3. Faulty output control wiring.
4. Faulty Weld Control PCB or
Chopper PCB.
1. WELDING TERMINALS switch in
wrong position, be sure switch is
in WELDING TERMINALS
ALWAYS ON position.
2. Faulty Weld Control PCB or
Chopper PCB.
1. Open breakers may need to be
reset.
2. Faulty receptacle.
3. Faulty auxiliary circuit wiring.
4. GFCI tripped.
CAUTION
E-4
TROUBLE SHOOTING
RECOMMENDED
COURSE OF ACTION
If all recommended possible areas of
misadjustment have been checked
and the problem persists, Contact
your local Lincoln Authorized
Field Service Facility.