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F-7

 

TROUBLESHOOTING AND REPAIR

F-7

 

 

 

 

 

 

 

 

Troubleshooting Guide – See Wiring Diagrams for location of specified

Observe Safety Guidelines

components and for troubleshooting of specific circuits.

 

 

detailed in the beginning of this manual.

 

 

 

 

 

 

 

 

PROBLEMS

 

POSSIBLE AREAS OF

 

 

RECOMMENDED

 

(SYMPTOMS)

 

MISADJUSTMENT(S)

 

 

COURSE OF ACTION

 

 

 

 

 

 

 

 

 

 

 

 

FUNCTION PROBLEMS

 

 

 

 

There is no gas flow when the gun

1. If a spool gun adapter is installed,

 

1. Check plug J1 on the control board

trigger is activated . The wire feeds

make certain the toggle switch in

 

for loose or faulty connections. See

and the arc voltage is present.

the spool gun kit in the correct

 

wiring diagram.

 

 

 

 

position.

 

 

 

 

 

 

 

2. If a spool gun adapter is NOT

 

2. Check the gas solenoid by discon-

 

 

 

 

necting it from leads #108A and

 

 

 

installed, make certain the jumper

 

#116A&B. Apply a 12VDC external

 

 

 

plug is installed in J5. See

the

 

supply to the solenoid.

If the sole-

 

 

 

wiring diagram.

 

 

noid does NOT activate then it may

 

 

 

3. Check the gas source and hoses

 

be faulty. Replace.

 

 

 

 

 

 

 

 

 

 

for kinks or leaks.

 

 

 

 

 

 

 

 

The machine stops feeding wire

1. Check for a mechanical restric-

 

1. Check the motor armature current.

while welding.

When the gun trig-

tion in the wire feed path.

The

 

Normal armature current is 2.0 to 2.7

ger is released and pulled again,

gun may be clogged.

 

 

amps maximum. If the motor arma-

the wire feed starts.

2. Make sure the drive rolls and

 

ture current is normal, and the motor

 

 

 

 

continues to shut-off, the control

 

 

 

guide plates are clean and are

 

board may be faulty. Replace.

 

 

 

the correct size.

 

 

 

 

 

 

 

3. Check the spindle for ease of

 

2. If the motor armature current is high

 

 

 

 

(over 2.7 amps) and there are NO

 

 

 

rotation.

 

 

restrictions in the wire feeding path

 

 

 

 

 

 

then the motor or gearbox may be

 

 

 

 

 

 

defective. Replace.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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 1-800-833-9353

POWER MIG 200

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Lincoln Electric SVM157-A service manual Function Problems