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FUNCTION PROBLEMS
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
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.
CAUTION
The engine will not go to high
idle when striking an arc. The
automatic idle system functions
normally when using auxiliary
power. Weld and auxiliary
power are normal when the idle
switch is in the “High Idle”
position. The engine starts,
runs, and shuts down normally.
Check that the welding cables,
electrode holder, and work
clamp are tight and in good
condition.
This may be normal operation
if the machine has a Wire
Feed Module, and is operating
in CV mode. See the
operatorʼs manual for the Wire
Feed Module.
Perkins powered models:
The 2 CR Reed Relay, or the
wiring that connect it to the
PC board and chassis ground
may be faulty. The Reed
relay should close when
sufficient current is drawn
from the weld output
terminals.
The idle/engine protection PC
board may be faulty.
Classic® 300G and
Classic® 300D Kubota
powered machines:
The weld current sense wire
that passes through the
current sensor may have a
poor electrical connection.
These leads are not
numbered on Classic® 300G.
on Kubota powered
machines; these are leads
67A and 67B.
Take these connections apart,
clean them thoroughly and
securely reconnect them.
Check the condition of the
crimp connections and
replace any that are loose,
corroded or suspect in any
way.
TROUBLESHOOTING AND REPAIR
F-21 F-21
CLASSIC® 300D & 300G
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