Lincoln Electric IM620-B manual Weld Problems

Page 32

E-4

TROUBLESHOOTING

E-4

 

 

 

 

PROBLEMS

POSSIBLE

(SYMPTOMS)

CAUSE

 

OUTPUT PROBLEMS

Solenoid does not close when

1. Make certain that plugs J2

trigger is pulled or purge button

and J3 are connected to the

is pressed. Wire feeds properly.

control board securely.

 

 

WELD PROBLEMS

Variable or “hunting” arc.

1.

Worn and/or melted contact

 

 

tip -Replace.

 

2.

Worn work cable or poor

 

 

work connection.

 

3.

Loose electrode connect-

 

 

ions. -Check for loose or

 

 

faulty connections.

 

4.

Wrong electrode polarity for

 

 

process being used.

Weld porosity, narrow and ropey

1. Contaminated weld joint or

bead, or electrode stubbing into

improper procedures . -

plate when welding.

Clean joint

and check

 

procedure (wire speed and

 

all voltage).

 

 

 

Motor feeds but there is no wire

1. Make sure all molex plugs

feed speed control.

and leads

are securely

 

connected to the control

 

board.

 

 

2. Check speed sensor - see

 

maintenance section.

RECOMMENDED COURSE OF ACTION

Contact your local

Lincoln Authorized

Field Service Facility

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, con- tact your local authorized field service facility for technical troubleshooting assistance before you proceed.

LN-25

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Contents LN-25 Portable CV/CC Semiautomatic Wire Feeder Safety California Proposition 65 WarningsElectric Shock can kill Cylinder may explode if damaged Précautions DE Sûreté Sûreté Pour Soudage a L’ArcPlease Examine Carton and Equipment For Damage Immediately Table of Contents Installation Safety Precautions Power Source ConnectionINVERTEC, CV300 and Other Newer Lincoln Power Sources GUN Cable Connection to FeederCV Adapter For GMA GUN and CablesWire Feed Drive Roll and Guide Tube Kits Weld Cable ConnectionElectrode Cable Connection Work Cable ConnectionOperation General DescriptionRecommended Processes and Equipment Welding CapabilityElectrode Polarity Switch Wire Feed Mode SwitchWire Speed Dial and Range Switch LN-25 Instruments and ControlsGAS Post PRE-FLOW Timers Optional Work Clip LeadAWG Remote ARC Voltage Control OptionalSequence of Operation Loading ElectrodeMounting 22 to 30 LB READI-REELCOILS Mounting 10 to 30 LB SpoolsLoading Wire Drive Idle Roll Pressure SettingSetting ARC Sensing Wire Feed Speed VV CC Mode Presetting Wire Feed SpeedSetting Constant Wire Feed Speed CV Mode Making a Weld In/MinProcedure AT END of Coil WeldingMotor Overload Shutdown Automatic Protection ShutdownOvervoltage Shutdown Table C.1 AccessoriesLN-25 Option Chart K430-2 GAS Solenoid KIT Accessories Optional AccessoriesK434-1 GAS Flow Timer KIT K461 Pulse Power Control Cable Remote Output Control Options and Control Cable AssembliesK443-2 LN-25 Contactor KIT K443-3 LN-25 Contactor KITK433 Power Source Remote BOX K432 Remote Control Cable AssemblyK439 Remote Extension Cable Assembly K625, K626, K627 Remote Control Cable AssemblyPower Source CableType Rating Electrode Connection K444, K444-1 or K444-2 Remote Voltage Control KITDrive Roll & Guide Tube Wire Sizes Used Kit No Dia. HoleMaintenance Routine MaintenanceAdjusting Speed Sensor Module Circuit Protection and Automatic ShutdownCalibration of LN-25 Wire Speed Dial Troubleshooting HOW to USE Troubleshooting GuideProblems Possible Symptoms Cause Recommended Course of ActionFeeding Problems Weld Problems Wiring Diagram Wiring Diagram Dimensions LN-25 Physical DimensionsLN-25 LN-25 Ground Fuera del área de trabajo CuerpoInflammable Votre corps PerschutzKeep your head out of fumes Guards offUse ventilation or exhaust to Desconectar el cable de ali No operar con panel abierto o
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