Miller DYNASTY 350, Owner'S Manual

Page: 25 / 136

OM-216 869 Page 19
4-4. Duty Cycle and Overheating
Duty Cycle is the percentage of 10
minutes that unit can weld at rated
load without overheating.
If unit overheats, output stops, a
Help message is displayed (see
Section 7-4), 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 unit and void warranty.
Overheating
0
15
A or V
OR
Reduce Duty Cycle
Minutes
Output Amperes
%Duty Cycle
10
100
0
100
200
300
400
500
600
700
350 1 Phase
350 3 Phase
700 1 Phase
700 3 Phase
20 30 40 50 60 70 80 90