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. A complete Parts List is available on-line at www.MillerWelds.com
OM-225 311 Page 10
3-2. Duty Cycle And Overheating
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
duty cycle before welding.
Y Exceeding duty cycle can
damage unit or gun and void
warranty.
Overheating
0
15
A or V
OR
Reduce Duty Cycle
Minutes
duty1 4/95 − 230 342-A / 230 343-A
A. 115 VAC
Model
B. 230 VAC
Model
3 Minutes Welding 7 Minutes Resting
20% duty cycle at 90 amps
30% duty cycle at 135 amps, 60 Hz
2 Minutes Welding 8 Minutes Resting