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TROUBLESHOOTING & REPAIR
F-4 F-4
IDEALARC CV-400
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
216-383-2531 or 1-800-833-9353.
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.
Machine is dead - no output - no
fan - no pilot light.
The machine is dead - no output -
no fan - the pilot light is on.
1. Contact your local authorized
Lincoln Electric Field Service
Facility for technical assistance.
1. Make sure the input power
switch is ON.
2. Check the three-phase 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.
1. Check the three-phase input
voltage at the machine. Input
voltage must match the rating
plate and the reconnect panel.
2. Check for blown or missing
fuses in the input lines.
1.
Contact the Lincoln Electric
Service Department, (216) 383-
2531 or 1-800-833-9353 (WELD).
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
control transformer (T2) for
loose or faulty connections. See
the Wiring Diagram.
3. Perform the
Control
Transformer Test.
1. Perform the
Input Contactor
Test.
2. Check the associated leads for
loose or faulty connections
between the input contactor
(CR1), the reconnect panel and
the main transformer. See the
Wiring Diagram.
3. Perform the
Main Transformer
Test.