Miller Electric Big Blue 300 Owner's Manual page 49

B. Generator Power
Trouble
No generator power output at ac recep-
tacles; weld output okay.
No generator power or weld output.
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.
Reset receptacle supplementary protector(s) (see Section 7-1).
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.
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 8-9). 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 8-9).
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.
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.
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.
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.
Remedy
Remedy
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