E-3
TROUBLE SHOOTING
CAUTION
VANTAGE
®
520 SD
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
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
Battery does not stay charged.
Engine will not idle down to low
speed.
Engine will not go to high idle when
attempting to weld.
Engine will not go to high idle when
using auxiliary power.
1. Faulty battery.
2. Faulty engine alternator.
3. Loose or broken lead in charging
circuit.
4. Loose fan belt may need tighten-
ing.
1. Idler switch in HIGH idle position,
make sure switch is set to AUTO.
2. Faulty relay.
3. Faulty Weld Control PCB (Printed
Circuit Board)
1. Poor work lead connection to
work.
2. Welding Terminals switch in
wrong position.
3. No open circuit voltage at output
studs.
4. Faulty Weld Control PCB.
1. Broken wire in auxiliary current
sensor wiring.
2. Auxiliary power load is less than
100 watts.
3. Faulty Weld Control PCB.
If all recommended possible areas of
misadjustment have been checked
and the problem persists,
Contact
your local Lincoln Authorized
Field Service Facility.
FUNCTION PROBLEMS
Observe all Safety Guidelines detailed throughout this manual
Summary of Contents for VANTAGE 520 SD
Page 8: ...8 NOTES VANTAGE 520 SD ...
Page 20: ...A 12 NOTES VANTAGE 520 SD ...
Page 49: ...F 3 CONNECTION DIAGRAMS VANTAGE 520 SD ...
Page 50: ...F 4 CONNECTION DIAGRAMS VANTAGE 520 SD ...
Page 51: ...F 5 CONNECTION DIAGRAMS VANTAGE 520 SD ...
Page 56: ...F 10 NOTES VANTAGE 520 SD ...