. A complete Parts List is available at www.MillerWelds.com
OM-253086 Page 18
4-6. Duty Cycle And Overheating
247219-B
Duty Cycle is percentage of 10 min-
utes that unit can weld at rated load
without overheating.
If unit overheats, output stops, a
Help message is displayed (see
Section 11-2), 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 damage machine or torch and
void warranty.
6 Minutes Welding 4 Minutes Resting
Overheating
0
15
A or V
OR
Reduce Duty Cycle
Minutes
250 A @ 60% Duty Cycle For Stick Process
250 A @ 60% Duty Cycle For TIG Process
0
50
100
150
200
250
300
10 100
Stick (≥ 230V, 1Φ Input)
- − Stick (208V, 1Φ Input)
‐ ‐ ‐TIG (208V Input)
TIG (≥ 230V Input)
Stick (3Φ Input)
Output Amperes
% Duty Cycle
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