Miller Electric Big 40 WG manual Standard Auxiliary Power, Optional Auxiliary Power Plant, Engine

C.	Standard Auxiliary Power
	Trouble	Remedy
No auxiliary power output; weld output		Reset receptacle circuit breakers.
okay.
No auxiliary power or weld output.		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.
High output at auxiliary power		Check engine speed, and adjust if necessary.
receptacles.
		Have Factory Authorized Service Agent adjust auxiliary power field current resistor R3.
Low output at auxiliary power		Check engine speed, and adjust if necessary.
receptacles.
		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.
D. Optional Auxiliary Power Plant
	Trouble	Remedy
No or low output at optional auxiliary		Place Process/Contactor switch in Electrode Hot - Stick position (see Section 6-3).
power plant/receptacle RC5
(CC/CV models only).
		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.
High output at optional auxiliary power		Check engine weld/power speed, and adjust if necessary (see Section 8-5).
plant/receptacle RC5 (CC/CV models
only).
		Have Factory Authorized Service Agent check field current regulator board PC1.
Erratic output at optional auxiliary power		Have Factory Authorized Service Agent check brushes and slip rings, and field current regulator board
plant/receptacle RC5 (CC/CV models		PC1.
only).
E.	Engine
	Trouble	Remedy
Engine will not crank.		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.

OM-4405 Page 45