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| THEORY OF OPERATION |
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CONTROLS AND OPERATIONAL |
| If the Yellow LED illuminates, and the Red and Green | |||||||||||||||
FEATURES |
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| LEDʼs blink on and off alternately, the unit is unable to | |||||||||||||
| Potentiometer used to | cool itself adequately. Check to make sure the fan is | |||||||||||||||
1. Output Current Knob: A | not obstructed and the fan is operating properly. Prior | ||||||||||||||||
set the output current used during welding, from 5A | to resuming normal operation, the unit must be turned | ||||||||||||||||
to 155A. |
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| off and turned back on to reset this error condition. | |||||||||||||
2. Welding Mode Switch: With three positions, con- |
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| WARNING |
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trols the welding mode of the machine: two for Stick |
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welding (Soft and Crisp) and one for Lift TIG weld- | If blinking, the Thermal LED indicates that the input | ||||||||||||||||
ing. |
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• Soft Stick: |
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| For a welding with a low spatter | voltage is out of ranges. |
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• Crisp Stick: | presence. |
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For an aggressive welding arc, | green and one red) operates as described in the | ||||||||||||||||
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| with an increased Arc stability. |
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• Lift TIG: |
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| When the mode switch is in the Lift |
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| LED status |
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| FUNCTION | ||||||||
TIG position, the stick welding functions are disabled |
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and the machine is ready for Lift TIG welding. Lift | Green | Red |
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TIG is a method of starting a TIG weld by first press- | ON | OFF |
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| The machine is turned ON. | ||||||||||||||||
ing the TIG torch electrode on the work piece in |
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| ON condition: The machine is at | ||||||||||||
order to create a low current short circuit. Then, the |
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electrode is lifted from the work piece to start the TIG |
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| idle | |||||||||||||
arc. | This indicator will turn on when |
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| is present. |
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3. Thermal LED: | OFF | ON |
| AThe machine is turned ON. | |||||||||||||
the machine is overheated and the output has been |
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disabled. This normally occurs when the duty cycle |
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| On condition: Presence of weld- | ||||||||||||
of the machine has been | exceeded. Leave | the |
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| ing current at the output leads. | |||||||||||
machine on to allow the internal components to cool. |
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| This permanent | LED condition, | ||||||||||||
When the indicator turns off, normal operation is |
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again possible. |
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| showed at idle | ||||||||||
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| FIGURE B.1 |
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| OFF | OFF |
| cates machine damage. | ||||||
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| The machine is turned OFF and/or the | |||||||||
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| input cord could be disconnected from | ||
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| 1 |
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| the mains. | With the Power | |||
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| ERROR condition: | ||||||
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| Switch turned ON and the input cord | ||
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| properly connected to a "live" main | ||
2 |
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| supply, this LED condition indicates | ||
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| ON | ON |
| machine damage. |
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3 |
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| ERROR condition: This LED condition | ||||
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| 5 | 1. Output Current Knob |
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| 2. Welding Mode Switch |
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| 6 | 3. Thermal LED |
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| 4. Power On/Off and Output LEDʼs |
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| 5. Positive Quick Disconnect |
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6. Negative Quick Disconnect INVERTEC®