Miller Electric Big Blue 402D, Owner'S Manual

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OM-495 Page 53
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9-7. Overload Protection (Deutz F4L2011-Powered Units)
Stop engine.
When a circuit breaker or fuse opens,
it usually indicates a more serious
problem exists. Contact Factory Au-
thorized Service Agent.
1 Fuse F1
2 Fuse F2
F1 and F2 protect the stator exciter wind-
ing from overload. If F1 opens, weld and
generator power is low or stops entirely.
If F2 opens, weld output is low or stops
entirely. 4 kVA/kW generator power is still
available.
3
Circuit Breaker CB4 (Not Shown)
4 Circuit Breaker CB5
(CC/CV Models Only)
5 Circuit Breaker CB6
(CC/CV Models Only)
6 Circuit Breaker CB10 (Not Shown)
7 Circuit Breaker CB11
8 Circuit Breaker CB12
9 Circuit Breaker CB13
10 Circuit Breaker CB14
(Optional − Not Shown)
CB4 protects the welding arc drive (dig)
circuit. If CB4 opens, electrode may stick
to the workpiece more frequently during
low voltage (short arc length) conditions.
CB4 automatically resets when the fault is
corrected.
CB5 protects the 24 volt ac output to re-
mote receptacle RC14, and 24 volt output
to field current regulator board PC1 (CC/
CV models only). If CB5 opens, weld out-
put and 24 volt output to RC14 stops. On
units with optional three-phase genera-
tor, generator power output at receptacle
RC5 also stops if CB5 opens.
CB6 protects the 115 volt ac output to re-
mote receptacle RC14 (CC/CV models
only). If CB6 opens, 115 volt output to
RC14 stops.
CB10 protects the engine battery circuit.
If CB10 opens, the engine will not crank.
CB10 automatically resets when the fault
is corrected.
CB11 protects the engine wiring harness.
On CC models, if CB11 opens the max
OCV circuit does not work and open cir-
cuit voltage is variable at all times (see
max OCV note under Weld Controls in
Section 6-2). If CB11 opens on CC/CV
models, weld output stops (generator
power is still available).
CB12 protects the field flashing circuit. If
CB12 opens, the generator may not ex-
cite at start-up and weld and generator
power output may not be available.
CB13 protects the engine shutdown cir-
cuit. If CB13 opens, the engine cranks but
does not start.
CB14 protects the throttle solenoid on
units with the auto idle option. If CB14
opens, the engine will not run at idle
speed. CB14 automatically resets when
the fault is corrected.
Press button to reset breaker.
2 1
9
8
7
4
802 170-D / Ref. 802 311
5