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F-8

 

 

 

 

F-8

TROUBLESHOOTING & REPAIR

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 SET speed is adjustable and

1. Contact your local Lincoln

1. While the motor is running,

steady. The actual speed is uncon-

Authorized

Field

Service

carefully unplug the 15 pin

trollable. The meter displays the

Facility.

 

 

molex plug from the control PC

actual speed correctly or reads

 

 

 

 

board.

"EEE."

 

 

 

 

If the motor continues to run,

 

 

 

 

 

 

 

 

 

 

the power PC board may be

 

 

 

 

 

faulty. Replace.

 

 

 

 

 

If the motor stops, the control

 

 

 

 

 

PC board may be faulty.

 

 

 

 

 

Replace.

 

 

 

 

 

2. Perform the Wire Drive Motor

 

 

 

 

 

Test.

 

 

 

The SET speed is adjustable and

1. Check for loose or faulty con-

1. Perform the Hall Effect Module

steady. The actual speed reading

nections on leads #510, #525,

Alignment Procedure.

is incorrect and/or erratic.

and

#555

between the hall

2. Perform the Hall Effect Feed-

 

effect

module and the

control

 

back Test.

 

PC board.

 

 

 

 

 

 

 

 

 

 

 

3. If the Hall Effect Feedback

 

 

 

 

 

Test is OK, the control PC

 

 

 

 

 

board may be faulty. Replace.

 

 

 

 

 

 

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.

LN-9 GMA Wire Feeder

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Lincoln Electric SVM138-A service manual Troubleshooting Guide