Lincoln Electric IDEALARC DC-655 Manual Do Utilizador

Observe Safety Guidelines

detailed in the beginning of this manual.

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.

Major physical or electrical dam-
age is evident.

1.  Contact the Lincoln Electric

Service Dept. 1-800-833-9353.

The machine is dead - the input
contactor does not operate.  The
pilot light is not lit.

1.  The power switch (S1) is in the

ON position.

2.  Check for blown or missing

fuses in the input lines.

3.  Check the three-phase input

line voltage at the machine.
The input voltage must match
the rating plate and reconnect
panel.

1.  Check the power switch (S1)

and associated leads and con-
nections.  See the Wiring
Diagram.

2.  Perform  the  Control Trans-

The input contactor operates, but
no welding output.  The 115 VAC
auxiliary supply is present at the
receptacle.

1.  Check the electrode and work

cables for loose or faulty con-
nections.

2.  If the Thermal Protection Light

is ON, the machine is overheat-
ed.  Wait for the machine to
cool and remedy the cause of
the overheating problem.  See
the  Fan/Snubber Board LED
Chart.

3.  Make certain either the output

terminals switch is in the ON
position or the external gun
trigger circuit is functioning
properly.

1.  Perform  the  Internal Trigger

2.  Perform the Firing Board Test.

3.  Perform the Main Transformer

4.  Perform  the  SCR Output

5.  

The control board may be
faulty.  See Control Board LED
Chart.