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TROUBLESHOOTING & REPAIR |
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Observe Safety Guidelines |
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detailed in the beginning of this manual. |
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| TROUBLESHOOTING GUIDE | ||||||||
PROBLEMS |
| POSSIBLE AREAS OF |
| RECOMMENDED |
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(SYMPTOMS) |
| MISADJUSTMENT(S) |
| COURSE OF ACTION |
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| WELD OUTPUT PROBLEMS |
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The machine will weld, but the |
| 1. Make sure the machine is prop- | 1. The engine RPM may be too | ||||||||
welding arc is “cold”. The engine |
| erly set for the electrode and | low. | Perform | the | Engine | |||||
runs normally and the auxiliary |
| process being used. | Check | Throttle Adjustment test. |
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power is normal. |
| electrode size, mode switch set- | 2. Connect the machine to a resis- | ||||||||
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| ting, amps or voltage setting. If | tive | load | bank. | Connect | an | ||||
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| gas is used, make sure the cor- | accurate | ammeter | and | volt | |||||
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| rect type of gas is used and that | meter to the output of the | ||||||||
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| the gas flow is set correctly. | machine, (Meters are often built | ||||||||
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| 2. Make sure that the process | into | modern | load | banks.) | |||||
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| does not demand more power | Connect a means of measuring | ||||||||
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| than the machines able to pro- | the | engine RPM. | (See | the | |||||
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| 3. If the current seems about right, | Test for recommended methods | ||||||||
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| duce. |
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| Engine Throttle | Adjustment | |||||
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| but the electrode easily sticks in | of measuring engine RPM. |
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| the puddle, try increasing the | 3. Place the mode switch in the | ||||||||
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| “ARC CONTROL” setting. | |||||||||
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| 4. Check for loose or faulty con- | output control | fully clockwise, | |||||||
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| place the idle switch in the | |||||||||
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| nections at the weld output ter- | “HIGH IDLE” position. Set the | ||||||||
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| minals and welding cable con- | weld terminals switch to “WELD | ||||||||
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| nections. |
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| TERMINALS ON” position. |
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| 5. Check for adequate connection | 4. Make sure that nothing is | ||||||||
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| between the work cable and the | |||||||||
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| work piece. | The work | cable | plugged into either of the | ||||||
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| should be attached to clean | Amphenol receptacles. |
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| metal, as close to the weld area | 5. Start the machine and allow the | ||||||||
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| as practical. | The work clamp | engine to run for about a | |||||||
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| must be in good condition and | minute. Apply a load with the | ||||||||
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| have adequate spring tension. | resistance | load | bank, | and | |||||
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| 6. The weld cables may be too | adjust until the external meters | ||||||||
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| read about 305 amps and about | |||||||||
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| long, and/or too small, causing | 29 VDC. If the machine will not | ||||||||
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| excessive voltage drop between | produce this output, apply as | ||||||||
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| the machine and the arc. |
| much load as possible. |
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CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
