Lincoln Electric IM910 manual Your local Lincoln Authorized, Field Service Facility

Page 29

E-3

TROUBLESHOOTING

E-3

 

Observe all Safety Guidelines detailed throughout this manual

 

PROBLEMS

(SYMPTOMS)

POSSIBLE

CAUSE

RECOMMENDED

COURSE OF ACTION

The Wire Feed Speed Range is only

1. The 83% wire feed speed dual

 

50 - 374 in/min ( 1.3 - 9.5 m/min)

 

procedure is activated with the low

 

 

 

speed gear. Check dual procedure

 

 

 

switch in gun.

 

 

 

 

 

 

 

DISPLAY PROBLEMS

 

"POS", "PRE" or "BRN" show on the

1.

The LN-15 is in the Press and

 

display.

 

Spin set-up mode.

 

 

2.

One of the DIP switches on the

 

 

 

feed head board is set to "ON" for

 

 

 

timer setting mode.

 

 

3.

Cycle power to the LN-15 or wait

 

 

 

45 seconds.

If all recommended possible areas of

 

4.

The LN-15 is an old ALPHA unit

misadjustment have been checked

 

 

and a DIP switch is in the wrong

and the problem persists, Contact

 

 

position.

your local Lincoln Authorized

The voltage display reads "0.0" volts

1.

The power source meter polarity

Field Service Facility.

during welding

 

switch is in the wrong position.

 

 

2.

Set the power source meter polar-

 

 

 

ity switch to match the welding

 

 

 

process.

 

 

 

 

 

 

 

WELDING PROBLEMS

 

Porosity in the weld.

1.

The part being welded is wet, dirty

 

Variable or "hunting" arc.

 

or rusty.

 

 

2.

The electrode being used is wet,

 

 

 

dirty or rusty.

 

 

3.

There is insufficient shielding gas

 

 

 

flow from possible cuts in the gas

 

 

 

hose

 

 

4.

There is moisture or water in the

 

 

 

shielding gas line.

 

 

5.

There is too much shielding gas

 

 

6.

There is too much wind or drafts.

If all recommended possible areas of

 

7.

The arc voltage is set too high.

 

misadjustment have been checked

 

8.

The wrong shielding gas is being

 

 

used.

and the problem persists, Contact

 

 

your local Lincoln Authorized

Variable or "hunting" arc.

1.

Worn and/or melted contact tip.

 

2. Worn work cable or poor work

Field Service Facility.

 

 

connection.

 

 

3.

Loose electrode connection.

 

 

4.

Wrong electrode polarity for the

 

 

 

process being used.

 

 

 

 

 

The arc burns back to the tip.

1.

The spool of electrode is tangled.

 

 

2.

The electrode and work leads are reversed

 

 

 

(welding with the wrong polarity.)

 

 

3.

The liner is clogged.

 

 

4.

The contact tip is worn.

 

 

5.

The wire drive tension is improp-

 

 

 

erly set.

 

 

 

 

 

CAUTION

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

LN-15 CONTROL CABLE MODEL (CE)

Image 29
Contents Safety Depends on You LN-15 Wire FeederCalifornia Proposition 65 Warnings SafetyE C T R I C S H O C K c a n kill Iii Welding and Cutting Sparks can Cause fire or explosionSûreté Pour Soudage a L’Arc Précautions DE Sûreté60974-10 Safety Vii Table of Contents Technical Specifications LN-15 K1871-3 CE InstallationSafety Precautions InstallationLocation High Frequency ProtectionEngine Drive Power Source Connection Power Source ConnectionElectrode Connection Work ConnectionConnection DIAGRAM, Control 4INSTALLATIONA-4Guns and Cables Assemblies Electrode PolarityOnly qualified personnel should perform this operation Procedure to Install Drive Rolls and Wire GuidesFeeding Wire Electrode Operation Safety PrecautionsGeneral Description Figure B.1a Across the ARC ModelLN-15 POWER-UP Sequence Spring Tension ARM CV/CC ModeWFS Units Set the pressure arm as follows See Figure B.2aCold FEED/GAS Purge Switch Wire Drive ConfigurationFlow Meter Step Trigger Interlock SwitchSpindle Brake Shielding GAS ConnectionFigure B.3 Constant Current OperationFigure B.4 CC Wire Speed Setting Making a Weld Optional Equipment AccessoriesRoutine Maintenance MaintenancePeriodic Maintenance Calibration SpecificationHOW to USE Troubleshooting Guide TroubleshootingContact your local Lincoln Contact your local Lincoln Authorized Field Service FacilityYour local Lincoln Authorized Field Service FacilityFault Code Description Possible Adjustments Errors on the DisplayLN-15 DiagramsDimension Print LN-15 Control Cable Model CE Aviso DE Guards off