E-4

TROubLEShOOTING

E-4

 

 

 

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

PRObLEMS

(SYMPTOMS)

POSSIbLE

CAuSE

RECOMMENDED

COuRSE OF ACTION

Output Problems

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.

 

 

 

When the trigger is pulled, the wire

The Run-In switch is “ON”.

Use the set-up Push-button to turn

feeds slowly.

 

 

Run-in OFF.

 

 

 

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.

RED-D-ARC LN-25™ PRO EXTREME

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Lincoln Electric IM10078 specifications TROubLEShOOTING