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F-8

TROUBLESHOOTING & REPAIR

F-8

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

 

 

 

 

PROBLEMS

 

POSSIBLE AREAS OF

RECOMMENDED

 

 

(SYMPTOMS)

 

MISADJUSTMENT(S)

COURSE OF ACTION

 

 

 

 

 

 

 

OUTPUT PROBLEMS

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The machine will not produce more than 200 amps.

1.This may be normal operation. If the output current exceeds 290 amps, an electronic protection circuit will reduce the current to less than 200 amps. The machine will continue to produce this low current until the protection circuit is reset. Reset occurs when the output load is removed.

2.Check the input voltage and input voltage reconnect procedures. See Input Voltage Reconnect Procedure.

3.Check for loose or faulty welding cables.

1.Perform the Output Diode Test.

2.The control board may be faulty. Replace.

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CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call 216-383-2531 or 1-800-833-9353.

INVERTEC V250-S

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Lincoln Electric V250-S service manual Perform the Output Diode Test