Lincoln Electric 11523, LN-25, IM-939A, 11389 specifications Troubleshooting

Page 34

E-4

TROUBLESHOOTING

E-4

 

 

 

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

PROBLEMS

(SYMPTOMS)

POSSIBLE

CAUSE

RECOMMENDED

COURSE OF ACTION

Output Problems

Wire feed speed consistently oper-

1.

The jumper lead for normal

1.

Properly

connect the normal

ates at the wrong value. The speed

 

speed/extra torque is connected

 

speed/extra torque jumper.

changes when the wire feed speed

 

improperly.

2.

Install the proper pinion gear in

knob is adjusted.

2.

The wrong gear is installed in the

 

the wire drive.

 

 

wire drive.

3.

Replace

the motor/gearbox

 

3. The brushes on the motor are

 

assembly.

 

 

 

 

worn.

 

 

 

 

 

 

 

 

 

The wire feed speed is fast (maxi-

1.

The tachometer is connected

1.

Verify all of the tachometer leads

mum) and there is no change when

 

improperly.

 

are properly connected.

the wire feed speed knob is adjust-

2.

The tachometer has failed.

2.

Replace the motor and tachome-

ed.

 

 

 

ter assembly.

 

 

 

 

 

Variable or "hunting" arc.

1.

Wrong size, worn and/or melted

1. Replace the contact tip.

 

 

contact tip.

 

 

 

 

 

2.

Worn work cable or poor work

2.

Verify all work and electrode con-

 

 

connection.

 

nections are tight and that the

 

 

 

 

cables are in good condition.

 

 

 

 

Clean/replace as necessary.

 

3.

Wrong polarity.

3.

Adjust polarity to the recommend-

 

 

 

 

ed procedure.

 

4.

The gas nozzle is extended

4.

Adjust the gas nozzle and shorten

 

 

beyond the contact tip or the wire

 

the stickout to 3/8 to 1/2 inches.

 

 

stickout is too long.

 

 

 

 

 

5.

Poor gas shielding on processes

5.

Check gas flow and mixture.

 

 

requiring gas.

 

Remove or block sources of

 

 

 

 

drafts.

 

 

 

 

 

 

 

 

(Digital display models)

1.

The Run-In switch is "ON"

1.

Place the Run-In switch to the

When the trigger is pulled, the wire

 

 

 

"OFF" position.

feeds slowly.

 

 

 

 

 

 

 

 

 

 

 

 

(Digital display models)

1.

The preset voltage calibration in

1.

Use the set-up menu to change

The preset voltage does not match

 

the feeder has been selected for a

 

the preset voltage calibration in

the power source voltage.

 

different power source.

 

the feeder to match the power

 

 

 

 

source.

 

 

Poor arc starts with sticking or

1. Improper procedures or tech-

1. See "Gas Metal Arc Welding

"blast-offs", weld porosity, narrow

 

niques.

 

Guide" (GS-100)

and ropy looking bead.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CAUTION

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

LN-25 PRO EXTREME

Image 34
Contents LN-25 PRO Extreme Safety LN-25 PRO ExtremeElectric Shock can kill Cylinder may explode if damaged Précautions DE Sûreté Sûreté Pour Soudage a LʼArcThank You Table of Contents Installation Technical Specifications LN25 PRO K2613-3High Frequency Protection Safety PrecautionsLocation Weld Cable SizeShielding GAS Connection Cable ConnectionsBuild UP of Shielding GAS MAY Harm Health or Kill Procedure to Install Drive Rolls and Wire Guides Wire Drive ConfigurationChanging the GUN Receiver Bushing Loading Spools of Wire Pressure ARM AdjustmentGUN Connection Power Source to LN25 PRO Extreme Cable Connection Diagrams Across the ARC SET-UPSFigure A.7 Figure A.9 Safety Precautions OperationGeneral Description Figure B.1 Description Analog VoltmeterWire Feed Speed Knob Wire Feed Speed, CV OperationPolarity LED Internal Controls Figure B.2 LN-25 PRO ExtremeCV/CC Switch Cold Feed PushbuttonConstant Current Wire Welding Figure B-3POWER-UP Sequence Rear Controls GAS Purge PushbuttonWire Type Electrode Size KP KIT AccessoriesFactory Installed Equipment Drive Roll KitsAccessories Accessories K1500-5 Gun Receiver Bushing compatible Periodic Maintenance MaintenanceRoutine Maintenance Calibration SpecificationCover Board LN-25 PRO ExtremeTroubleshooting HOW to USE Troubleshooting GuideDigital Display Models Error Codes Output Problems Troubleshooting Diagrams Diagrams Dimension Print LN-25 PRO Extreme LN-25 PRO Extreme Precaucion Warnung
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