Lincoln Electric IM10047 RED-D-ARC GX300 - Manual (Page 31)

E-3 TROUBLESHOOTING E-3
GX 300
Observe all Safety Guidelines detailed throughout this manual
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
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.
Engine does not develop full
power.
1. Idler switch in High idle position.
Set switch to Auto.
2. External load on welder or auxil-
iary power. Remove all external
loads.
3. Faulty PC board or idler sole-
noid.
1. Poor work lead connection to
work. Make sure work clamp is
tightly connected to clean base
metal.
2. "Contactor" switch is in wrong
position. Set to "Welding On" when
welding without a control cable.
Refer to Operations chapter for prop-
er use of this switch.
3. Faulty PC board. Low idle speed
set to low.
1. Auxiliary power load is less than
100 watts. Idler may not respond
with less than a 100 watt load. Set
idler to "High".
2. Faulty PC board.
1. Fuel filter clogged, Replace.
2. Air filter clogged, clean or replace.
3. Fouled spark plugs, clean or
replace.
4. Valves out of adjustment.
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
Contact your local Authorized
Field Service Facility.