Lincoln Electric RANGER 225 GXT Service Manual page 50

F-10
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
Engine will not idle down to low
speed. Machine has normal weld
output and auxiliary power.
Engine will not go to high idle
when attempting to weld. Welding
output is normal when Idler Switch
(S3) is in "HIGH" position.
Automatic idle function works
properly when the auxiliary power
is loaded.
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. Make sure the Idler switch (S4)
is in the "Auto" position.
2. Make sure there is NOT an
external load on the weld
terminals nor the auxiliary
power receptacles.
1. Make sure the welding cables
and connections are tight.
CAUTION
RANGER® 225 GXT
RECOMMENDED
COURSE OF ACTION
1. With the Idler Switch (S4) in
the "Auto" position, check for
the presence of 12VDC at
leads #213 to #215 located at
the Idler Solenoid. If 12VDC is
present and the Idler Solenoid
is not activating, then the
solenoid may be faulty or there
is a mechanical restriction
preventing it from functioning.
2. If there is NOT 12VDC at leads
#213 to #215, then test for
12VDC from lead #213 to
ground (lead #5). See Wiring
Diagram. If 12VDC is present,
then check lead #215 for
continuity (zero ohms) from the
Idler Solenoid to the Printed
Circuit Board plug 1J9. If lead
#215 is OK, then the Printed
Circuit Board may be faulty.
Replace.
3. If there is NOT 12VDC from
lead #213 to ground (lead #5),
then check the Idler Switch
(S4) for proper operation and
associated wires for loose or
faulty connections.
1. Check for broken or faulty
connections in the sensing
leads (#254). Make sure their
connections are tight
Rectifier Bridge D1, and also at
the Polarity Switch. See Wiring
Diagram.
2. Make sure the leads are looped
three times through the current
sensor on the Printed Circuit
Board.
3. Check low idle speed for
2200RPM.
F-10
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