Miller Electric Big 40 WG Owner's Manual page 49

C. Standard Auxiliary Power
Trouble
No auxiliary power output; weld output
okay.
No auxiliary power or weld output.
High output at auxiliary
receptacles.
Low output at auxiliary
receptacles.
D. Optional Auxiliary Power Plant
Trouble
No or low output at optional auxiliary
power plant/receptacle RC5
(CC/CV models only).
High output at optional auxiliary power
plant/receptacle RC5 (CC/CV models
only).
Erratic output at optional auxiliary power
plant/receptacle RC5 (CC/CV models
only).
E. Engine
Trouble
Engine will not crank.
Reset receptacle circuit breakers.
Disconnect equipment from auxiliary power receptacles during start-up.
Check fuses F1 and F2, and replace if open (see Section 8-9). Have Factory Authorized Service Agent
check integrated rectifier SR1, capacitor C9, and the rotor.
Reset circuit breaker CB12. Have Factory Authorized Service Agent check diode D1 (CC models) or field
current regulator board PC1 (CC/CV models) (see Section 8-9).
Have Factory Authorized Service Agent check brushes and slip rings, and field excitation circuit.
power Check engine speed, and adjust if necessary.
Have Factory Authorized Service Agent adjust auxiliary power field current resistor R3.
power Check engine speed, and adjust if necessary.
Check fuse F1, and replace if open (see Section 8-9). Have Factory Authorized Service Agent check inte-
grated rectifier SR1, resistor R3, and capacitor C9.
Place Process/Contactor switch in Electrode Hot - Stick position (see Section 6-3).
Reset circuit breaker CB7 (see Section 7-2).
Reset circuit breaker CB5 (see Section 8-9).
Check engine weld/power speed, and adjust if necessary (see Section 8-5).
Have Factory Authorized Service Agent check brushes and slip rings, and field current regulator board
PC1.
Check engine weld/power speed, and adjust if necessary (see Section 8-5).
Have Factory Authorized Service Agent check field current regulator board PC1.
Have Factory Authorized Service Agent check brushes and slip rings, and field current regulator board
PC1.
Check battery, and replace if necessary.
Check battery connections and tighten if necessary.
Circuit breaker CB10 may be open. CB10 automatically resets when fault is corrected (see Section 8-9).
Have Factory Authorized Service Agent check engine wiring harness and components.
Check engine wiring harness plug connections.
Have Factory Authorized Service Agent check Engine Control switch S1.
Remedy
Remedy
Remedy
OM-4405 Page 45