Miller Electric Big Blue 300 manual Generator Power, Engine

B. Generator Power

Trouble	Remedy
No generator power output at ac recep-	Reset receptacle supplementary protector(s) (see Section 7-1).
tacles; weld output okay.
No generator power or weld output.	Disconnect equipment from generator power receptacles during start-up.
	Check fuse F1, and replace if open (see Section 8-9). Have Factory Authorized Service Agent check vol-
	tage regulator module PC3.
	Reset supplementary protector CB3 (see Section 8-9).
	Check Voltmeter/Ammeter help displays (see Section 8-11).
	Have Factory Authorized Service Agent check brushes and slip rings, and field excitation circuit.
High output at generator power ac re-	Have Factory Authorized Service Agent check voltage regulator module PC3.
ceptacles.
Low output at generator power ac recep-	Check engine speed, and adjust if necessary.
tacles.
	Check fuse F1, and replace if open (see Section 8-9). If F1 is open, have Factory Authorized Service
	Agent check the rotor.
C. Engine

Trouble	Remedy
Engine will not crank.	Check battery, and replace if necessary.
	Check battery connections and tighten if necessary.
	Circuit breaker CB1 may be open. CB1 automatically resets when fault is corrected (see Section 8-9).
	Have Factory Authorized Service Agent check engine wiring harness and components.
	Reset supplementary protector CB2 (see Section 8-9).
	Check engine wiring harness plug connections.
	Have Factory Authorized Service Agent check Engine Control switch S1, and control relay CR2.
Engine cranks but does not start.	Check fuel level.
	Check battery and replace if necessary. Check engine charging system according to engine manual.
	Have Factory Authorized Service Agent check control relay CR1, fuel solenoid FS1, and the fuel
	pump.
	Air in fuel system. See engine manual.
Engine hard to start in cold weather.	Use Preheat switch (see Section 6-1).
	Keep battery in good condition. Store battery in warm area off cold surface.
	Use fuel formulated for cold weather (diesel fuel can gel in cold weather). Contact local fuel supplier for
	fuel information.
	Use correct grade oil for cold weather (see Section 8-2).
	Have Factory Authorized Service Agent check Preheat switch S4, control relay CR3, and the glow
	plug.
Engine suddenly stops.	Check oil and coolant levels. Automatic shutdown system stops engine if oil pressure is too low or coolant
	temperature is too high (see Section 5-6).
	Circuit breaker CB1 may be open. CB1 automatically resets when fault is corrected (see Section 8-9).
	Reset supplementary protector CB2 (see Section 8-9). Have Factory Authorized Service Agent check
	engine alternator, engine harness, throttle solenoid TS1, fuel solenoid FS1, and the fuel pump.
	Have Factory Authorized Service Agent check Engine Control switch S1, control relay CR1, inte-
	grated rectifier SR2, fuel solenoid FS1, and the fuel pump.
	See engine manual.

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