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F-8

TROUBLESHOOTING & REPAIR

 

F-8

 

 

 

Observe Safety Guidelines

 

TROUBLESHOOTING GUIDE

detailed in the beginning of this manual.

 

 

 

 

 

 

 

 

PROBLEMS

 

POSSIBLE AREAS OF

RECOMMENDED

 

(SYMPTOMS)

 

MISADJUSTMENT(S)

COURSE OF ACTION

 

 

 

 

 

 

 

 

FUNCTION PROBLEMS

 

 

 

The output control

potentiometer

1. The output control switch (SW3)

1. The output control potentiome-

does not function when the output

may be defective.

ter or associated wiring may be

control switch (SW3) is in the

 

faulty. See the Wiring Diagram.

“Local” position.

The DC-655

 

 

 

 

operates normally when controlled

 

 

 

 

remotely.

 

 

 

 

 

 

 

 

The remote output control unit

1. The remote control unit or con-

1. The output control switch (SW3)

does not function properly when

necting cable may be defective.

may be

defective.

Check or

the output control switch (SW3) is

Check or replace.

replace.

See

the Wiring

in the “Remote” position. The DC-

 

Diagram.

 

 

655 operates normally when con-

 

2. Check the remote control leads

trolled locally from the machine’s

 

 

#75, #76 and #77 at plug P15,

output control potentiometer.

 

 

the terminal strip and the 14-pin

 

 

 

 

 

 

MS type connector. Check for

 

 

 

loose or

faulty connections.

 

 

 

See the Wiring Diagram.

 

 

 

 

 

 

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.

IDEALARC DC-655

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Lincoln Electric DC-655 service manual Function Problems