AC/DC TIG WELDER - Harbor Freight Tools

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TROUBLESHOOTING GUIDE - WELDING M<strong>AC</strong>HINE Use larger welding leads. See Figure L for proper size of tungsten. See Figure L for proper size of tungsten. Properly sharpen electrode. See Figure L for proper size of tungsten. SKU 91149 For technical questions, please call 1-800-444-3353. PAGE 18
TROUBLESHOOTING GUIDE - WELDING GUN No arc. Problem Arc between gas nozzle and workpiece. Welding gun body or power cable overheated. Welding wire melted onto contact tip. Possible Cause 1. Interruption of welding power circuit to welding gun or workpiece. 2. Power source or control defective. 1. Spatter build-up inside gas nozzle. 1. Welding current too high. 2. Contact tip not correctly tightened. 3. Ground clamp making poor contact. 4. Contact tip too far away from workpiece. 5. Burn-back time set too long. INSPECTION, MAINTENANCE, AND CLEANING - WELDING M<strong>AC</strong>HINE 1. WARNING! Make sure the Power Switch (10) is in its “OFF” position. Unplug the Power Cord Plug from its electrical outlet, and allow the Welder to completely cool before performing any inspection, maintenance, or cleaning procedures. 2. Before each use, inspect the general condition of the Welder. Check for damaged electrical wiring, loose connections, cracked, burnt, or broken parts, and any other condition that may affect its safe operation. If abnormal noise or vibration occurs, have the problem corrected before further use. Do not use damaged equipment. 3. Every six months: Blow off or vacuum dirt and dust deposits on the Welding Transformer (46) and other components. Dirt or dust deposits on the Welding Transformer and other internal components may reduce the insulating property or cause overheated Transformer. During heavy usage, clean monthly. 4. To replace the 3 AMP, 250V Fuse: Failure of the Welder to operate may be caused by a blown 3 AMP, 250V Fuse (8) as indicated by its melted wire strand within the Fuse. To replace the Fuse, unscrew and remove the Fuse Cap. Remove the old Fuse, and install a new 3 AMP, 250V Fuse. Then, replace the Fuse Cap. 5. When storing, make sure to store the Welder in a safe, clean, dry location out of reach of children and unauthorized users. 6. All maintenance, service, and repairs not listed in this manual are only to be attempted by a qualified service technician. SKU 91149 For technical questions, please call 1-800-444-3353. PAGE 19
Page 1 and 2: AC/DC TIG WELDER - 200 AMP Model 91
Page 3 and 4: 3. Keep bystanders, children, and v
Page 5 and 6: 7. Use only accessories that are re
Page 7 and 8: 7. When welding or cutting in small
Page 9 and 10: 25. Use the right tool or attachmen
Page 11 and 12: FRONT COVER CONTROLS 51B 51A 2 52 5
Page 13 and 14: To Install A Gas Cylinder: 1. CAUTI
Page 15 and 16: 2. DC MMA = The stick/electrode wel
Page 17: Welding Current: 1. While the weldi
Page 21 and 22: PLEASE READ THE FOLLOWING CAREFULLY
Page 23 and 24: ELECTRICAL SCHEMATIC - WELDING MACH

AC/DC TIG WELDER - Harbor Freight Tools

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