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OM-4428 Page 57
10-9. Overload Protection (Deutz F3L912-Powered Units)
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! Stop engine.
. When a supplementary protector, cir-
cuit breaker or fuse opens, it usually in-
dicates a more serious problem exists.
Contact Factory Authorized Service
Agent.
1 Fuse F1
2 Fuse F2
F1 and F2 protect the stator exciter winding
from overload. If F1 opens, weld and gener-
ator 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 Supplementary Protector CB5
(CC/CV Models Only)
5 Supplementary Protector CB6
(CC/CV Models Only)
6 Circuit Breaker CB10 (Not Shown)
7 Supplementary Protector CB11
8 Supplementary Protector CB12
9 Supplementary Protector CB13
10 Circuit Breaker CB14
(Not Shown)
CB4 protects the welding arc drive (dig) cir-
cuit. 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 cor-
rected.
CB5 protects the 24 volt ac output to remote
receptacle RC14, and 24 volt output to field
current regulator board PC1 (CC/CV mod-
els only). If CB5 opens, weld output and 24
volt output to RC14 stops. On units with op-
tional three-phase 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 weld control circuit. On
CC models, if CB11 opens the max OCV
circuit does not work and open circuit volt-
age 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 excite
at start-up and weld and generator power
output may not be available.
CB13 protects the engine control circuit. If
CB13 opens, the engine does not crank.
CB14 protects fuel solenoid FS1. If CB14
opens, the engine does not start. CB14 au-
tomatically resets when the fault is cor-
rected.
Press button to reset supplementary pro-
tector.
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