E-2

 

TROUBLESHOOTING

E-2

 

 

 

 

 

 

Observe all Safety Guidelines detailed throug out this manual

 

 

 

 

 

 

PROBLEMS

POSSIBLE AREAS OF

RECOMMENDED

 

 

(SYMPTOMS)

MISADJUSTMENTS

COURSE OF ACTION

 

 

 

 

 

 

PROBLEMS

Machine fails to hold the heat con-

1.

Rough or dirty commutator.

stantly.

 

 

 

2.

Brushes may be worn down to

 

 

limit.

 

3.

Field circuit may have variable

 

 

resistance connection or intermit-

 

 

tent open circuit due to loose, or

 

 

broken wire.

 

4.

Electrode lead or work lead con-

 

 

nection may be poor.

 

5.

Wrong grade of brushes may

 

 

have been installed on generator.

 

6.

Field rheostat may be making

 

 

poor contact and overheating.

 

 

 

Welder starts but fails to generate

1.

Generator or exciter brushes may

current.

 

be loose or missing.

 

2.

Exciter may not be operating.

 

3.

Field circuit of generator or

 

 

exciter may be open.

 

4.

Exciter may have lost excitation.

 

5.

Series field and armature circuit

 

 

may be open-circuited.

If all recommended possible areas of misadjustment have been checked and the problem persists,

Contact your local Lincoln Authorized Field Service Facility.

Welding arc is loud and spatters excessively.

1.Current setting may be too high.

2.Polarity may be wrong.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

PIPELINER 200D

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Lincoln Electric IM769 manual Possible Areas, Symptoms