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TROUBLESHOOTING & REPAIR
F-4 F-4
PRO-CUT 80
Observe Safety Guidelines TROUBLESHOOTING GUIDE
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
1-800-833-9353.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
OUTPUT PROBLEMS
Major physical or electrical dam-
age is evident when the sheet
metal cover(s) are removed.
1. Contact your local authorized
Lincoln Electric Field Service
Facility for technical assistance.
1. Contact the Lincoln Electric
Service Department,
1-800-833-9353 (WELD).
Machine is dead – no output – no
fan – no status indicator lights.
1. Make sure that the input power
switch is in the “ON” position.
2. Check the input voltage at the
machine. Input voltage must
match the rating plate and the
reconnect panel.
3. Check for blown or missing
fuses in the input lines and the
0.6 amp slow blow reconnect
fuse.
1. Check the input power switch
(S1) for proper operation. See
the Wiring Diagram.
2. Check the leads associated
with the power switch (S1) and
the auxiliary transformer (T2) for
loose or faulty connections.
See the Wiring Diagram.
3. Perform the Auxiliary Trans-
former Test.
Machine is dead - not output - no
status indicator lights - fans run.
1. Check the input voltage at the
machine. Input voltage must
match the rating plate and the
reconnect panel.
1. Perform the Auxiliary
Transformer Test.
2. Perform the Low Voltage
Circuit Test.
3. Perform the Input Rectifier
Test.
4. The control board may be
faulty. Replace.
5. The display board may be
faulty. Replace.
All status indicators remain lit
immediately after power up.
1. The microprocessor has experi-
enced a memory fault. Contact
your Local Lincoln Authorized
Field Service Facility.
1. The control board may be
faulty. Replace.