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F-7

 

TROUBLESHOOTING AND REPAIR

 

 

 

F-7

 

 

 

 

 

 

 

 

 

 

 

 

 

Observe Safety Guidelines detailed in the beginning of this manual.

 

 

 

 

 

 

 

 

 

 

 

PROBLEMS

POSSIBLE AREAS OF

RECOMMENDED

 

 

(SYMPTOMS)

MISADJUSTMENT(S)

COURSE OF ACTION

 

 

 

 

 

 

 

 

 

 

 

 

ENGINE PROBLEMS

 

 

 

 

 

Engine will not go to high idle when

1. Automatic idler may not function

1. Check that the leads are cor-

attempting to weld or when the aux-

if the auxiliary power is loaded to

rectly

wrapped

through the

iliary power is loaded. Welding out-

less than 100 Watts.

Toroid.

See Wiring Diagram.

put and

auxiliary

power output is

 

2. Perform the Toroid Test.

 

normal when Idler Switch is in the

 

 

 

 

 

 

 

 

“HIGH” position.

 

 

3. The Printed Circuit Board may

 

 

 

 

be faulty. Replace.

 

 

 

 

Engine will not go to high idle when

1. Make sure the welding cables

1. Check for broken or faulty con-

attempting to weld. Welding output

and connections are tight.

nections in the sensing lead

is normal when Idler Switch is in

 

(#254). Make sure the connec-

“HIGH”

position.

Automatic idle

 

tions are tight at the Output

function works properly when the

 

Rectifier

and

the

Polarity

auxiliary power is loaded.

 

Switch.

See

the

Wiring

 

 

 

 

Diagram.

 

 

 

 

 

 

 

2. Make sure the #254 lead is

 

 

 

 

wrapped

properly through the

 

 

 

 

Toroid.

See

the

Wiring

 

 

 

 

Diagram.

 

 

 

 

 

 

 

 

 

 

 

 

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.

RANGER® 3 PHASE

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Lincoln Electric SVM207-A service manual Wiring