OM-363 Page 10
3-6. Duty Cycle And Overheating
Duty Cycle is the percentage of 10
minutes that the unit can weld at rated
load without overheating.
If unit overheats, output stops, front
panel voltmeter/ammeter displays a
HLP3 or HLP5 message (see Section
6-1), and cooling fans run. Wait fifteen
minutes for unit to cool. Reduce am-
perage or duty cycle before welding.
NOTICE − Exceeding duty cycle can
damage unit and void warranty.
Overheating
0
15
A
OR
Reduce Duty Cycle
Minutes
duty1 4/95 / 190 276
4 Minutes Welding 6 Minutes Resting
40% Duty Cycle At 350 Amperes
6 Minutes Welding 4 Minutes Resting
60% Duty Cycle At 300 Amperes
Overheating
0
15
A
OR
Reduce Duty Cycle
Minutes
duty1 4/95 / Ref. 116 198
4 Minutes Welding 6 Minutes Resting
40% Duty Cycle At 250 Amperes
6 Minutes Welding 4 Minutes Resting
60% Duty Cycle At 200 Amperes
250 DX Models
350 LX Models
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