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F-12

TROUBLESHOOTING AND REPAIR

F-12

 

 

Observe Safety Guidelines detailed in the beginning of this manual.

PROBLEMS

 

POSSIBLE AREAS OF

RECOMMENDED

(SYMPTOMS)

 

MISADJUSTMENT(S)

COURSE OF ACTION

 

 

 

 

 

 

OUTPUT PROBLEMS

 

No high frequency. Machine is in

1.

If the machine location is in a

1. Check the high voltage trans-

the TIG mode and has normal out-

 

highly dirty environment with

former (T3). The normal resis-

put.

 

conductive contaminant's, check

tance of the secondary winding

 

 

and clean the spark gap with a

of the high voltage transformer

 

 

low pressure air stream per the

is 12.5k ohms.

 

 

maintenance instructions.

 

 

2. Check spark gap operation and

WARNING

 

 

 

 

setting. Normal is (0.020").

ELECTRIC SHOCK CAN

 

 

Refer to Maintenance section

 

 

of this manual.

KILL. When 115VAC is

 

 

 

applied to the primary of T3. A

 

 

 

very high voltage is developed on

 

 

 

the secondary winding. For

 

 

 

assistance call the Lincoln Electric

 

 

 

Service Department 1-888-935-

 

 

 

3877.

 

 

 

----------------------------------------------

 

 

 

2. Check the values of R3, and

 

 

 

C4.

 

 

 

3. Perform the T1 Transformer

 

 

 

Test.

 

 

 

4. The control board may be

 

 

 

faulty. Replace.

 

 

 

 

No gas flow when Amptrol is acti-

1.

The gas supply is either empty

1. Possible gas supply problems.

vated in the TIG mode. Machine

 

or not turned on.

Consult your local welder/gas dis-

has normal output - fan runs.

 

 

A "click" can be heard indicating

2.

The flow regulator may be set

tributor.

that the gas solenoid valve is oper-

 

too low.

 

ating.

3. Check the gas hose for kinks or

 

 

 

 

 

blockages.

 

 

4. Check the filter screen inside

 

 

 

gas inlet fitting to solenoid valve.

 

 

 

 

 

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call 1-888-935-3877.

PRECISION TIG® 225

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Lincoln Electric SVM186-A service manual Electric Shock can

SVM186-A specifications

The Lincoln Electric SVM186-A is a versatile and highly efficient welding machine that stands out in the competitive landscape of industrial welding equipment. Designed to meet the needs of both professionals and hobbyists, this machine combines advanced technology with robust construction, delivering outstanding performance in various welding applications.

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