Miller Big Blue 400 PX CE Owner's Manual page 53

Trouble
High output at generator power ac re-
ceptacles.
Low output at generator power ac recep-
tacles.
C. Engine
Trouble
Engine will not crank.
Engine cranks but does not start.
Engine hard to start in cold weather.
Engine suddenly stops.
Engine slowly stopped and cannot be
restarted.
Check Voltmeter/Ammeter help displays (see Section 8-12).
Have Factory Authorized Service Agent check brushes and slip rings, and field excitation circuit.
Have Factory Authorized Service Agent check voltage regulator module PC3.
Check engine speed, and adjust if necessary.
Check fuse F1, and replace if open (see Section 8-11). If F1 is open, have Factory Authorized Service
Agent check the rotor.
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 8-11).
Have Factory Authorized Service Agent check engine wiring harness and components.
Reset supplementary protector CB2 (see Section 8-11).
Check engine wiring harness plug connections.
Have Factory Authorized Service Agent check Engine Control switch S1, Fuel/Hour gauge FUEL/HM,
and control relay CR2.
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/Hour gauge FUEL/HM, fuel
solenoid FS1, and the fuel pump.
Air in fuel system. See engine manual.
Use Preheat switch S4 (see Section 6-2).
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 8-1).
Have Factory Authorized Service Agent check Preheat switch S4, control relay CR3, and the glow
plug.
Check oil and coolant levels. Automatic shutdown system stops engine if oil pressure is too low or coolant
temperature is too high (see Section 5-8 ).
Check fuel/hour gauge for indication of shutdown.
Reset supplementary protector CB2 and/or clear fault causing circuit breaker CB1 to trip (see Section
8-11). Have Factory Authorized Service Agent check engine alternator, engine harness, 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.
Check fuel level.
Check fuel/hour gauge for indication of shutdown.
Check engine air and fuel filters (see Sections 8-5 and 8-10).
See engine manual.
Remedy
Remedy
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