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F-5

TROUBLESHOOTING & REPAIR

F-5

 

 

 

 

 

 

Observe Safety Guidelines detailed in the beginning of this manual.

 

 

 

 

 

 

 

PROBLEMS

 

POSSIBLE AREAS OF

RECOMMENDED

 

(SYMPTOMS)

 

MISADJUSTMENT(S)

COURSE OF ACTION

 

 

 

 

 

 

 

 

OUTPUT/FEEDING PROBLEMS

 

 

The machine has output, wire

1. Possible faulty fan motor.

1. Perform the Fan Motor Test.

feed, gas flow but NO fan.

2. Possible faulty Control P.C.

2. Check for continuity between

 

 

 

 

Board.

#6 to Fan or #1 to Fan on

 

 

 

 

Control P.C. Board. Replace.

 

 

 

The machine has output, gas

1. Possible bad drive motor.

1. Perform the Wire Drive Test.

flow and fan but does not have

2. Possible bad Control P.C.

2. If 3 - 30 vdc is not at the drive

wire drive.

 

 

Board.

motor check for OCV at the

 

 

 

 

 

 

 

board on pins 1 and 10 on J3.

 

 

 

If OCV is present possible

 

 

 

 

faulty Control P.C Board.

 

 

 

 

Replace. If OCV is not

 

 

 

 

present check continuity of

 

 

 

 

wires CAP- and CAP+.

 

 

 

 

No wire feed when gun trigger is

1. If the wire drive motor is

1. Perform the Wire Drive Test.

pulled. Fan runs, gas flows and

running, make sure that the

2. If wire drive test is OK, then

 

machine has correct open circuit

correct drive roll and wire

 

check for OCV at CAP- and

 

voltage. ( 33 vdc maximum) -

guide is installed in the

 

CAP+ on the control board. If

weld output.

 

machine.

 

correct voltage is present,

 

 

 

 

 

 

 

2. Check for clogged cable liner

possible faulty Control P.C.

 

 

 

or contact tip.

Board. Replace.

 

 

 

3. Check for proper size cable

3. If open circuit voltage is not

 

 

 

liner and contact tip.

present at CAP- and CAP+ on

 

 

 

control board check continuity

 

 

 

of leads.

 

 

 

 

 

 

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.

COMPACT WIRE WELDERS

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Lincoln Electric SVM189-B service manual OUTPUT/FEEDING Problems