Miller 059015056 Owner's Manual - Page 16

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3-7. Duty Cycle And Overheating

Overheating

OM-287504 Page 10

MigMatic S400i

MigMatic S400iP

MigMatic S500i

60% Duty Cycle

6 Minutes Welding

Minutes

Duty Cycle is percentage of 10

minutes that unit can weld at rated

load without overheating.

If unit overheats, thermostat(s)

opens, output stops, and cooling

fan runs. Wait fifteen minutes for

unit to cool. Reduce amperage or

voltage, or duty cycle before

welding.

NOTICE − Exceeding duty cycle

can

warranty.

4 Minutes Resting

A or V

Reduce Duty Cycle

damage

unit

and

void