Lincoln Electric PRO-CUT 60 SVM104-A Service Manual page 48

F-7
TROUBLESHOOTING GUIDE
PROBLEMS
(SYMPTOMS)
The "THERMAL" LED is lit.
The "MALFUNCTION"
"FAULT" LED is blinking. The
machine has no output.
The "MALFUNCTION"
"FAULT" LED is lit.
machine has no output.
When the torch trigger is pulled
the "OUTPUT ON" LED lights
for a very short period of time.
The pilot arc is unusually bright
but the cutting arc does not
transfer to the work.
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 216-383-2531 or 1-800-833-9353.
PRO-CUT 60
TROUBLESHOOTING & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
OUTPUT PROBLEMS
1. The machine may be over-
or heated. This condition may
be due to not enough ventila-
tion. Make certain that the
machine's air intakes and
exhaust louvers
blocked or restricted. Allow
machine to cool.
2. The machine's duty cycle
may have been exceeded.
Allow machine to cool and
modify cutting process.
or 1. Check the torch consumables
The to see if they are melted
together or are touching each
other. Clean or replace.
2. Turn the machine off and on
again. If the "FAULT" LED will
not stay off when you try to
cut there is a failure within the
machine. THE MACHINE
SHOULD NOT BE LEFT ON.
3. Replace the torch and cable
assembly.
1. Check Torch Consumables.
2. Check for proper Air Pres-
sure.
3. Check work cables and
connections.
4. Clean any painted or heavily
corroded work surfaces.
5. If no malfunction or fault indi-
cators are lit, then contact
your local Lincoln Authorized
Field Service Facility.
CAUTION
Observe Safety Guidelines
detailed in the beginning of this manual.
RECOMMENDED
COURSE OF ACTION
1. The
primary thermostat could
be faulty. Replace. See
wiring diagram.
2. Check leads #321 and
are not
#322 for loose or faulty con-
nections at plug J8 on the
Control Board.
3. If no loose or faulty wiring is
found, the Control Board
could be faulty. Replace.
1. The torch
assembly could be faulty.
Perform the Torch, Torch
Cable
Internal Trigger and Safety
Circuit Tests.
2. The Power Board could be
faulty.
Board Test.
3. Perform Transistor Module
Test.
4. The Control Board could be
faulty. Replace.
5. Perform Main Transformer
Test.
1. The Transistor
could be faulty.
the Transistor Module Test.
2. If the transistor module is
faulty, replace the Power
Board also.
normally closed
and cable
Assembly, and
Perform Power
Module
Perform