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TROUBLESHOOTING & REPAIR
F-11 F-11
CLASSIC II
TROUBLESHOOTING GUIDE Observe Safety Guidelines
detailed in the beginning of this manual.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 216-
383-2531 or 1-800-833-9353.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
ENGINE PROBLEMS
The engine “cranks” but will not
start.
1. Check for adequate fuel supply.
2. Press the engine protection
“Reset” button. Note: On later
models without a “Reset” but-
ton, turn the ignition switch
“OFF” and then back “ON.”
3. Check the fuse in the engine
protection relay. Note: Not
present on later models.
4. On later models check the fuel
solenoid circuit breaker located
near the welding output termi-
nals. Reset if tripped.
1. Check the ignition switch for
proper operation. Check the
associated leads for loose or
faulty connections. See the
Wiring Diagram.
2. Check the fuel solenoid. Make
sure it is opening when 12VDC
is applied to leads #58(+) to
#60(-).
3. The engine protection relay may
be faulty. Note: On later models
the Idler/Engine Protection PC
board may be faulty.
4. The engine fuel injectors may
need service.
The engine starts but shuts down
after a short period of time.
1. Check for adequate fuel supply.
2. Check engine oil level.
3. Check engine alternator belt.
1. The oil pressure or oil tempera-
ture sensor may be causing the
engine protection relay (PC
Board on later models) to shut
off the fuel solenoid. Make sure
oil pressure and temperature
are correct before replacing
sensors.
2. The engine alternator may be
faulty, causing the CR1 relay
(PC Board on later models) to
activate, which signals the
engine protection relay to shut
off the fuel solenoid.
3. The protection relay may be
faulty. Note: On later models
the Idler Engine Protection PC
board may be faulty.
4. The engine fuel injectors may
need service.