TROUBLESHOOTING

Observe Safety Guidelines

detailed in the beginning of this manual.

Troubleshooting Guide

 

 

 

 

 

 

 

 

PROBLEMS

 

 

POSSIBLE AREAS OF

 

 

(SYMPTOMS)

 

 

MISADJUSTMENT(S)

 

 

 

 

 

TIG WELDING PROBLEMS

 

 

No high frequency. Machine is in

 

 

1. In order for the high frequency

 

 

the TIG Mode and has normal

 

 

 

to operate, the machine must

 

 

output.

 

 

 

be either in the start only

 

 

 

 

 

 

Mode or the continuous high

 

 

 

 

 

 

frequency mode.

 

 

 

 

 

2.

The high frequency spark gap

 

 

 

 

 

 

may be too large or shorted.

 

 

 

 

 

 

Check gap as per

 

 

 

 

 

 

maintenance instructions.

 

 

 

 

 

 

 

 

 

No gas or water flow when arc start

 

 

1.

Gas supply is empty or not

 

 

switch or amptrol is activated in the

 

 

 

turned on.

 

 

TIG Mode. Machine has output -

 

 

 

 

 

 

fan runs. When toggling between

 

 

2.

Gas or water hose may be

 

 

the Stick and TIG Modes a “Click”

 

 

 

pinched.

 

 

can be heard indicating that the

 

 

 

 

 

 

solenoids are operating.

 

 

3.

Gas or water solenoid may be

 

 

 

 

 

 

blocked with dirt. Use filters

 

 

 

 

 

 

to prevent reoccurrence.

 

 

 

 

 

 

Consult your Local welder/gas

 

 

 

 

 

 

distributor.

 

 

 

 

 

 

 

 

 

Arc rectification when AC TIG

 

 

1.

Tungsten electrode may be

 

 

welding.

 

 

 

too small for process.

 

 

 

 

 

2.

Manual balance control may

 

 

 

 

 

 

be misadjusted. Readjust to

 

 

 

 

 

 

the negative direction.

 

 

 

 

 

3.

If helium gas is being used,

 

 

 

 

 

 

reduce percentage of helium.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RECOMMENDED COURSE OF ACTION

If all recommended possible areas of misadjustment have been checked and the problem persists,

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, contact your local Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

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Lincoln Electric IM520-B manual Troubleshooting