TROUBLESHOOTING | |||
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TROUBLESHOOTING GUIDE
STICK WELDING
Observe Safety Guidelines detailed throughout this manual.
| SYMPTOM |
| CAUSE AND REMEDY |
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| Machine shuts off in Stick mode. | 1. | Welder has overheated and secondary thermostat has |
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| opened. Allow welder to cool before attempting to turn |
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| on. Be sure to provide adequate ventilation around |
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| welder to prevent recurrence. |
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| Stick electrode “blasts off” when touched | 1. | Weld current is set too high for electrode size. Reduce |
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| weld |
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| to workpiece. |
| current. |
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| 2. | Start Switch is “On”, and Start Current is set too high |
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| for electrode size. Either turn Start Switch OFF, or |
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| reduce Start Current. |
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| 3. | Arc Force control is set too high. Turn to minimum. |
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| Arc seems too hot, and reducing current | 1. | Arc Force control is set too high. Turn to minimum. |
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| potentiometer does not help. | 2. | Start Switch is ON and Start Current is set too high. |
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| Start time may be set too long. Reduce or turn Start |
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| Switch OFF. |
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| Machine welds at very low output, regard- | 1. Current Control switch is in REMOTE. Switch to |
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| less of Current potentiometer setting. |
| LOCAL. |
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| 2. | Start Switch is ON, and Start Current is set too low for |
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| the electrode size. Either turn Start Switch OFF, or set |
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| Start Current to proper level for the electrode size. |
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| 3. | Does machine have correct output in TIG mode? If not, |
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| see “Machine welds at low output” in TIG troubleshoot- |
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| ing section. |
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| 4. | If TIG welding output is OK, Control PC board is defec- |
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| tive. Replace. |
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| Machine welds at very high output, regard- | 1. Are the Start controls set correctly? See “Stick elec- |
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| trode |
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| less of Current potentiometer setting. |
| blasts off” above. |
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| 2. | Are the TIG welding outputs OK? If not, see TIG trou- |
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| bleshooting section. |
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| 3. | If TIG welding output is OK, Control PC board may be |
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| defective. Replace. |
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| Arc Force control has no effect. | 1. | The effect of the Arc Force Control will be less notice- |
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| able at high welding currents. Weld at low current (less |
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| than 150 amps) and check Arc Force effect. |
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| 2. | If no effects are seen at low currents, the Arc Force |
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| control potentiometer may be defective. Replace. |
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| 3. | Control PC board may be defective. Replace. |
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| Gas and water do not flow even though Gas | Machine is operating properly; gas and water solenoids, as |
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| well as |
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| and Water LED is lit in Stick mode. | the high frequency circuit, are disabled in the Stick mode. |
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WARNING
This Troubleshooting Guide is designed to be used by the machine Owner/Operator. Unauthorized repairs performed on this equipment may result in danger to the technician and machine operator and will invalidate your factory warranty. For your safety, please observe all safety notes and precautions detailed in the Safety Section of this manual to avoid electrical shock or danger while troubleshooting this equipment.
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SQUARE WAVE TIG 355
