E-3

TROUBLESHOOTING

E-3

Observe Safety Guidelines detailed in the beginning of this manual.

 

 

 

 

 

 

 

 

 

 

 

 

 

PROBLEMS

 

 

POSSIBLE

 

 

RECOMMENDED

 

 

(SYMPTOMS)

 

 

CAUSE

 

 

COURSE OF ACTION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FEEDING PROBLEMS

 

 

 

 

 

 

No wire feed when gun trigger is

 

 

1. If the wire drive motor is running

 

 

 

 

 

 

pulled. Fan runs, gas flows and

 

 

make sure that the correct drive

 

 

 

 

 

 

machine has correct open circuit

 

 

rolls are installed in the

 

 

 

 

 

 

voltage (33 vcd maximum) – weld

 

 

machine.

 

 

Contact your local Lincoln

 

 

output.

 

 

 

 

 

 

Authorized Field Service Facility.

 

 

 

 

 

 

2. Check for clogged cable liner or

 

 

 

 

 

 

 

 

 

 

contact tip.

 

 

 

 

 

 

 

 

 

 

3. Check for proper size cable liner

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

and contact tip.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GAS FLOW PROBLEMS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Low or no gas flow when gun

 

 

1. Check gas supply, flow regulator

 

 

 

 

 

 

trigger is pulled. Wire feed, weld

 

 

 

and gas hoses.

 

 

 

Contact your local Lincoln

 

 

output and fan operate normally.

 

 

 

 

 

 

 

Authorized Field Service Facility.

 

 

 

 

 

 

2. Check gun connection to

 

 

 

 

 

 

 

 

 

 

 

machine for obstruction or leaky

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

seals.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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 LINCOLN ELECTRIC FIELD SERVICE FACILITY for assistance before you proceed.

SP-170T

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Lincoln Electric IM794 manual Feeding Problems