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TROUBLESHOOTING AND REPAIR |
Observe all Safety Guidelines detailed throughout this manual.
PROBLEMS |
| POSSIBLE AREAS OF | RECOMMENDED |
(SYMPTOMS) |
| MISADJUSTMENT(S) | COURSE OF ACTION |
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| FUNCTION PROBLEMS (Continued) | ||
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The wire feeds for a few seconds and stops. The voltage display reads less than 8 VDC while the wire is feeding.
The dual procedure switch is not functioning at the gun.
1.Make sure the electrode and work cables are connected securely and properly.
2.Make sure the #21 lead is con- nected correctly at the power source.
3.Make sure the power source is operating correctly and capable of putting out more than 8 VDC.
1.Make sure the dual procedure switch is installed and connect- ed properly.
2.The “Remote LED” on the keypad must be lit and the toggle switch on the remote control (if present) must be in the gun position.
1.Make sure the #21 lead has continuity (zero ohms) to the workpiece and #67 lead has continuity (zero ohms) to the electrode wire. See the Wiring Diagram.
2.The control board may be faulty.
1.Check the resistance between pins E & M of the 14 pin Amphenol connector on the wire drive while the dual proce- dure switch is opened and closed. The resistance must change from an open to almost no resistance. If the resistance doesn’t change when the switch is opened and closed, check leads #519 and #520 for a bro- ken solder connection or wire. See the Wiring Diagram.
2.Check the resistance between leads #519 and #520 of the plug that goes into connector J7 on the control P.C. board. As the dual procedure switch is opened and closed, the resis- tance between leads #519 and #520 must change. If the resis- tance doesn’t change, Check for a broken connection or wire in the #519 and #520 leads. See the Wiring Diagram.
3.The control board may be faulty.
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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