Lincoln Electric Troubleshooting for SP-100, SP 100, and SP100 Welders

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F-5	TROUBLESHOOTING & REPAIR
TROUBLESHOOTING GUIDE		Observe Safety Guidelines
		detailed in the beginning of this manual.

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PROBLEMS (SYMPTOMS)

CODE 9794 and ABOVE

No Wire feed, weld output or gas flow when the gun trigger is pulled - Fan operates normally.

POSSIBLE AREAS OF MISADJUSTMENT(S)

OUTPUT PROBLEMS

1.Check the circuit breaker in the machine – Located in the wire drive compartment. Reset if tripped.

2.The thermostat may be tripped due to overheating. Let machine cool. Weld within the duty cycle or remove any air obstruction to machine.

3.Wire feed motor may be over- loaded – correct feeding prob- lem.

4.Gun trigger may be faulty.

RECOMMENDED COURSE OF ACTION

1.Check for 24 vac at plug 2J1 to 6J1 on the control board. If volt- age is not present, check conti- nuity of leads to fan motor. If leads are OK, replace fan motor. See Figure F.1

2.Remove main power supply to SP-100. With gun trigger pulled check for continuity (zero ohms) from 8J2 (lead #213) to 9J2 (lead #211) at harness plug. If zero ohms is indicated then trig- ger circuit is OK. See Figure F.1.

3.If an open circuit or high resis- tance is indicated in Step 2, then check leads #211, #212 and #213 for loose or broken con- nections. Also check the normal- ly closed thermostat mounted on the diode heat sink assembly.

4.The control board may be faulty

– Replace.

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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 216-383-2531 or 1-800-833-9353.

SP-100