Miller Electric Big Blue 502P - Manual (Page 37)

OM-491 Page 33
B. Auxiliary Power
Trouble Remedy
No auxiliary power output; weld output
okay.
Reset receptacle circuit breakers.
No auxiliary power or weld output. Disconnect equipment from auxiliary power receptacles during start-up.
Check fuses F1 and F2, and replace if open (see Section 7-7). Have Factory Authorized Service Agent
check integrated rectifier SR1, capacitor C9, and the rotor.
Reset circuit breaker CB12. Have Factory Authorized Service Agent check diode D1 (see Section 7-7).
Have Factory Authorized Service Agent check brushes and slip rings, and field excitation circuit.
High output at auxiliary power
receptacles.
Check engine speed, and adjust if necessary.
Have Factory Authorized Service Agent adjust auxiliary power field current resistor R3.
Low output at auxiliary power
receptacles.
Check engine speed, and adjust if necessary.
Check fuse F1, and replace if open (see Section 7-7). Have Factory Authorized Service Agent check inte-
grated rectifier SR1 and capacitor C9.
C. 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. Turn Engine Control switch to Off position and have Factory Autho-
rized Service Agent check fuel solenoid FS1 and throttle solenoid TS1. Circuit breaker CB10 automatical-
ly resets when fault is corrected (see Section 7-7).
Check engine wiring harness plug connections.
Have Factory Authorized Service Agent check Engine Control switch S1.
Engine cranks but does not start. Press Magnetic Shutdown switch MS1 when starting engine.
Check oil, fuel, and coolant levels. Automatic shutdown system stops engine if oil pressure or fuel level
is too low, or coolant temperature is too high (see Sections 4-7 and 7-8).
Reset circuit breaker CB13 (see Section 7-7). Have Factory Authorized Service Agent check engine-
related components and wiring.
Check battery and replace if necessary.
Have Factory Authorized Service Agent check Engine Control switch S1.
Check engine charging system according to engine manual.
Have Factory Authorized Service Agent check control relay CR2.
Air in fuel system. See engine manual.
Engine hard to start in cold weather. Use starting aid switch (see Section 5-1).
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 7-2).
Engine suddenly stops. Check oil, fuel, and coolant levels. Automatic shutdown system stops engine if oil pressure or fuel level
is too low, or coolant temperature is too high (see Sections 4-7 and 7-8).
See engine manual.
Engine slowly stopped and cannot be
restarted.
Check fuel level.
Check engine air and fuel filters (see Sections 7-3 and 7-6).