TROUBLESHOOTING
TROUBLE | CAUSE | REMEDY | |
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| F2 & F3 (MDA7 7A Slow Blow) | Check AC circuit. Replace fuse | |
| fuse in feeder blown. |
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| F1 (4 amp) fuse in feeder blown. | Check motor leads for shorts, then | |
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| replace fuse | |
No wire feed at torch, feeder |
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Replace switch. Check switch for | |||
not operating, i.e., no slave | |||
activated. Broken electrical cable. | operation. Check micro switch wires for | ||
motor or brake soleniod. | |||
| continuity. | ||
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| Relay K2 inoperative. | Check/Replace relay K2. | |
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| Loose J2, J3, P.C. board | Check J2, J3 connectors. | |
| connector |
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| Soleniod defective. | Replace soleniod. | |
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Brake soleniod inoperative. | Relay K2 inoperative. | Check for 42VAC across | |
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| Check relay K2 for AC not present. | |
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| Bad potentiometer. | Check potentiometer with meter. | |
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No wire feed at torch, feeder | Bad torch motor. | Check/Replace motor. | |
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Broken electrical cable. | Check motor and potentiometer wires | ||
operating properly. | |||
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| for continuity. | |
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| Bad speed control/PCB. | Check/Replace P.C. Board. | |
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| Loose or no cable connections. | Check all power connections. | |
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| Relay K2 not sending contactor | Check/Replace relay K2. | |
| signal. |
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Wire feeds, but welding wire |
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Contactor control cable loose or in | Check power supply owners manual for | ||
is not energized. | wrong position. | location and type of contactor signal | |
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| required, i.e. closing contacts or AC. | |
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| Welding power source not working | Check power supply for proper | |
| right. | operation. | |
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| Excessive spool drag pressure. | Decrease spool drag pressure inside | |
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| hub. | |
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| Dirty or worn conduit. | Blow out or replace conduit. | |
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Wire feeds erratically. | Incorrect pressure on drive rolls. | Adjust pressure at both feeder and | |
| torch. | ||
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| Idler roll stuck. | Check for lock washer under idler roll, or | |
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| replace if damaged or worn. | |
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| Wrong size contact tip. | See contact tip table. | |
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| Bad potentiometer. | Check with meter. | |
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Wire feeds one speed only | Broken electrical cable in lead | Check potentiometer wires for continuity | |
assy. | or shorts. | ||
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| Bad speed control. | Check/Replace P.C. Board. | |
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Wire walks out of drive rolls | Idler roll | Place groove in idler roll towards top. | |
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Rear wire guide missing. | Replace wire guide. | ||
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