Miller Electric Big Blue 400 PX manual Engine

Trouble	Remedy
	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 8-10).
	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 and isolation transformer
ceptacles.	T1.
Low output at generator power ac recep-	Check engine speed, and have Factory Authorized Service Agent 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.
	Have Factory Authorized Service Agent check voltage regulator module PC3 and isolation transform-
	er T1.
C. Engine

Trouble	Remedy
Engine will not crank.	Close engine access door. Engine access door switch LS1 prevents engine from starting or running if
	door is open.
	Reset Emergency stop switch (see Section 6-1).
	Check battery, and replace if necessary.
	Check battery connections, and clean 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, fuel pump, and
	engine governor system.
	Air in fuel system. See engine manual.
Engine hard to start in cold weather.	Use Preheat switch S4 (see Section 6-1).
	Start engine with Engine Speed switch in 60 Hz/20-410 A (1800 rpm) position. Run engine at 60 Hz
	(1800 rpm) for ten minutes before changing engine speed.
	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.

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