Miller Big Blue 500 Pro Owner's Manual page 58

B. Standard Generator Power
Trouble
No generator power output at AC recept-
acles; weld output okay.
No generator power or weld output.
High output at generator power AC re-
ceptacles.
Low output at generator power AC re-
ceptacles.
C. Three-Phase Generator Power
Trouble
No or low output at three-phase gener-
ator/receptacle RC5.
Erratic output at three-phase generator/
receptacle RC5.
D. Engine
Trouble
Engine will not crank.
Engine cranks but does not start.
Engine starts, but stops when Engine
Control switch is released.
Engine hard to start in cold weather.
OM-278739 Page 54
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Complete Parts List available at www.MillerWelds.com
Reset receptacle supplementary protectors. Reset GFCI receptacle.
Check fuse F1, and replace if open (see Section 8-11). Have Factory Authorized Service Agent check
integrated rectifiers SR1 and SR2, resistor R3, and capacitor C6.
Disconnect equipment from generator power receptacles during start-up.
Check fuses F1 and F2, and replace if open (see Section 8-11). Have Factory Authorized Service Agent
check integrated rectifiers SR1 and SR2, capacitor C6, and the rotor.
Reset supplementary protector CB4. Have Factory Authorized Service Agent check integrated rectifier
SR1 .
Have Factory Authorized Service Agent check brushes and slip rings, and field excitation circuit.
Have Factory Authorized Service Agent adjust generator power field current resistor R3.
Check fuse F1, and replace if open (see Section 8-11). Have Factory Authorized Service Agent check
integrated rectifier SR2, resistor R3, and capacitor C6.
Have Factory Authorized Service Agent check brushes and slip rings.
Reset supplementary protector CB1 (see Section 7-1).
Have Factory Authorized Service Agent check brushes and slip rings.
Have Factory Authorized Service Agent check brushes and slip rings.
Supplementary protector CB2 open. Reset CB2.
Check fuel level.
Check battery connections and tighten if necessary. Check battery, and replace if necessary.
Circuit breaker CB10 may be open. CB10 automatically resets when fault is corrected (see Section 8-11).
Have Factory Authorized Service Agent check engine wiring harness and components.
Air in fuel system. See engine manual.
Check engine wiring harness plug connections.
Have Factory Authorized Service Agent check control relay CR5 and Engine Control switch S1.
Check battery and replace if necessary. Check engine charging system according to engine manual.
Have Factory Authorized Service Agent check control relay CR5. Have engine Factory Authorized
Service Agent check fuel pump and fuel system.
Check oil level. Automatic shutdown system stops engine if oil pressure is too low or engine temperature
is too high (see Section 5-5). Automatic shutdown system is inhibited for 30 seconds after start-up.
Have Factory Authorized Service Agent check control relay CR5.
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 engine manual).
Remedy
Remedy
Remedy