| TROUBLESHOOTING |
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| Observe all Safety Guidelines detailed throughout this manual |
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| PROBLEMS |
| POSSIBLE |
| RECOMMENDED |
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| (SYMPTOMS) |
| CAUSE |
| COURSE OF ACTION | ||
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| PROBLEMS |
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Low or no shielding gas flow. | 1. Out of gas. | 1. | Check that an adequate gas sup- | ||||
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| ply is available. |
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| 2. | Gas supply is turned off or discon- | 2. | Check that all gas supply valves | ||
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| nected. |
| are open. |
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| 3. | Gas supply flow regulator is | 3. | Check that gas flow is set between | ||
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| improperly set. |
| 50 to 70 SCFH. |
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| 4. | Machineʼs gas solenoid valve has | 4. | See machineʼs instruction manual. | ||
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| malfunctioned. |
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| 5. | Blockage in gun along gas path. | 5. | Gently blow out debris from core | ||
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| tube. |
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| 6. | Gun cable kinked or flattened. | 6. | Attempt to straighten out cable, or | ||
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| replace cable. |
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| 7. | Blockage due to excessive spatter | 7. | Clean or replace gas cone or gas | ||
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| accumulation on gas cone or gas |
| diffuser. |
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| diffuser. |
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| 8. | Excessive gas leakage from sup- | 8. | Find and repair all leaks. |
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| ply. |
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| 10. Gas leakage at | 10. Damaged | both | |||
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| connection. |
| seals. Gun connector not fully | ||
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| inserted | into machine. | (See |
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| Maintenance Section). |
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Wire feeder runs or begins feeding | 1. Defective trigger, (contacts closed | 1. | Replace | trigger. | (See | ||
wire without pulling the gun trigger. |
| or dirty). |
| Maintenance Section). |
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2.Defective (closed) trigger circuit in 2. See machineʼs instruction manual the welding machine.
3.Trigger lead(s) inside gun cable 3. Damaged control leads along
are shorted together or commonly | cable; | repair | if | possible. |
shorted to either welding or acces- | Otherwise, replace gun cable. | |||
sory switch circuits |
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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 your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.