.
A complete Parts List is available at www.MillerWelds.com
OM-254915 Page 12
4-5. Duty Cycle And Overheating
6 Minutes Welding
4 Minutes Resting
Duty Cycle is percentage of 10
minutes that unit can weld at rated
load without overheating.
If unit overheats, thermistors open,
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 damage unit and void warranty.
Overheating
0
15
A or V
OR
Reduce Duty Cycle
Minutes
60% Duty Cycle At 300 Amperes
40% Duty Cycle At 350 Amperes
sduty1 5/95 / 217 442-A
4 Minutes Welding
6 Minutes Resting
10
15
20
25 30
40
50 60 70 80 90 100
100
150
200
225
250
300
400
500
% DUTY CYCLE
WELDING AMPERES
4-6. Volt-Ampere Curve
217 443-A
The volt-ampere curves show the
normal minimum and maximum
voltage and amperage output
capabilities of the welding power
source. Curves of other settings fall
between the curves shown.
