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V205-T AC/DC
TROUBLESHOOTING & REPAIR
F-4 F-4
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(WELD).
OUTPUT PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
OUTPUT PROBLEMS
Major physical or electrical damage
is evident when the sheet metal
cover(s) are removed.
1. Contact your local authorized
Lincoln Electric Field Service
Facility for assistance.
1. Contact the Lincoln Electric
Service Department 1-800-833-
9353.
The machine is dead—no fan –no
output—no LEDs.
1. Make sure the input power
switch is in the ON position.
2. Check the main input fuses. If
open replace.
3. Make sure the correct input volt-
age is applied to the machine.
1. Check the input power switch for
proper operation. Also check the
associated leads for loose or
faulty connections. See wiring
diagram.
2. Perform the Input Filter Board
Test.
The main input fuses or breakers
repeatedly fail.
1. Make certain the fuses or break-
ers are properly sized for the
input draw of the machine.
2. The welding procedure may be
drawing too much input current
or the duty cycle may be too
high. Reduce the welding cur-
rent and/or reduce the duty
cycle.
1. The Input Filter Board may be
faulty. Perform the Input Filter
Board Test.
2. The Main IGBT Inverter Board
may be faulty. Perform the
Main IGBT Inverter Board Low
Voltage Supply Test.