Miller Big Blue 450 Duo CST, Owner'S Manual

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Complete Parts List is available at www.MillerWelds.com
OM-266621 Page 41
907 477
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Stop engine.
When a circuit breaker, supplementary
protector, or fuse opens, it usually indi-
cates a more serious problem exists.
Contact Factory Authorized Service
Agent.
1 Primary Fuses F2 Thru F7
Primary fuses are 30 A, 250 V, Slo Blo
fuses, Miller Part No. 247 869.
2 Fuse Block For Left CST(as facing
front panel)
3 Fuse Block For Right CST (as facing
front panel)
4 Fuse F1
F1 protects the stator exciter winding from
overload. If F1 opens, weld and generator
power is low or stops entirely.
5
Supplementary Protector CB2
6 Supplementary Protector CB3
7 Circuit Breaker CB1
CB1 protects the engine battery circuit. If
CB1 opens, the engine will not crank. CB1
automatically resets when the fault is cor-
rected.
CB2 protects the engine wiring harness. If
CB2 opens, the engine will not crank.
CB3 protects part of the exciter control
wiring harness. If CB3 opens, generator
power output may stop.
Press button to reset supplementary pro-
tector.
1
5
4
2
3
6
7
8-11. Overload Protection