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Service and repair should only be performed by Lincoln Electric factory trained personnel.
Unauthorized repairs performed on this equipment may result in danger to the technician
or machine operator and will invalidate your factory warranty. For your safety and to avoid
electrical shock, please observe all safety notes and precautions detailed throughout this
manual.
If for any reason you do not understand the test procedures or are unable to perform the
test/repairs safely, contact the Lincoln Electric Service Department for electrical trou-
bleshooting assistance before you proceed. Call 1-888-935-3877.
NOTE: The procedures and tests described in this test are written with the under-
standing that the repair technician fully understands the process of locating and
accessing (within the welding machine) the specific board or device involved in
each procedure or test.
TEST DESCRIPTION
The Thermostats are located in various locations within the welding machine. See Machine
Diagram for specific locations.
This test will determine if a thermostat is intermittently opening or is fully open.
MATERIALS NEEDED
Small, gauge (#18) short jumper wire
(Wire should be approximately 4 inches in length)
THERMOSTAT TEST – THERMAL PROTECTION
TROUBLESHOOTING AND REPAIR
F-47 F-47
INVERTEC® V450-PRO
WARNING
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