Miller Electric Big Blue 500 X, Big Blue 400P manual Engine

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 9-8).
	Have Factory Authorized Service Agent check engine wiring harness and components.
	Check engine wiring harness plug connections.
	Have Factory Authorized Service Agent check control relay CR1 and Engine Control switch S1.
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 engine wiring harness, time delay relay TD1, control
	relay CR5, fuel pump, fuel solenoid FS1, and diode/capacitor board D10/C10.
	Air in fuel system. See engine manual.
Engine starts, but stops when Engine	Check oil, and coolant levels. Automatic shutdown system stops engine if oil pressure is too low or coolant
Control switch is released.	temperature is too high (see Section 5-7). Automatic shutdown system is inhibited for 30 seconds after
	start-up.
	Have Factory Authorized Service Agent check time delay relay TD1, and control relay CR5.
Engine hard to start in cold weather.	Use starting aid switch (see Section 6-1or 7-1).
	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 9-1).
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 5-7). Automatic shutdown system is inhibited for 30 seconds after
	start-up.
	See engine manual.
Engine slowly stopped and cannot be	Check fuel level.
restarted.
	Check engine air and fuel filters (see Sections 9-4and 9-7).
	See engine manual.
Battery discharges between uses.	Turn Engine Control switch off when unit is not running.
	Clean top of battery with baking soda and water solution; rinse with clear water.
	Recharge or replace battery if necessary.
	Periodically recharge battery (approximately every 3 months).
Engine idles, but does not come up to	Have Factory Authorized Service Agent check idle module PC7 and current transformer CT1.
weld speed (models with idle option
only).
	Check for obstructed throttle solenoid.
Engine does not run at idle speed	CC models: place Stick/TIG Selection switch in Stick position.
(models with idle option only).	CC/CV models: place Process/Contactor switch in any position but Remote On/Off Switch Required-
	TIG.
	Check for obstructed throttle solenoid.
	Have Factory Authorized Service Agent check idle module PC7, and control relays CR3 and CR6.
Engine uses oil during run-in period;	Dry engine according to run-in procedure (see Section 11).
wetstacking occurs.

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