Lincoln Electric RANGER 225 GXT Service Manual page 47

F-7
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
The machine has low welding
output and low auxiliary output.
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.
TROUBLESHOOTING AND REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
OUTPUT PROBLEMS
1. The brushes may be worn.
Contact your local Lincoln
Authorized Service Facility.
2. The engine RPM may be low.
CAUTION
RANGER® 225 GXT
RECOMMENDED
COURSE OF ACTION
1. If the engine HIGH IDLE RPM
is low (set to 3700 rpm), then
perform the Throttle
Adjustment Test.
2. Perform the Rotor Voltage
Test.
3. Check the Output Control
Potentiometer.
resistance is 10,000 ohms.
Also check associated wiring
for loose or faulty connections.
4. The Rotor may be faulty.
Perform the Rotor Resistance
Test.
5. The Printed Circuit Board may
be faulty. Replace.
6. If the engine HIGH IDLE RPM
is OK, then the engine may
have lost horsepower and be in
need of major repair (full load
should be 3500 RPM).
F-7
Normal