Miller Electric Big Blue 402D, Owner'S Manual, Page: 71 / 116

OM-495 Page 65
Return To Table Of Contents
C. Standard Generator Power
Trouble Remedy
No generator power output at ac recep-
tacles; weld output okay.
Reset receptacle circuit breakers.
No generator power or weld output. Disconnect equipment from generator power receptacles during start-up.
Check fuses F1 and F2, and replace if open (see Section 9-7 or 10-8). 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 (CC models) or field
current regulator board PC1 (CC/CV models) (see Section 9-7 or 10-8).
Have Factory Authorized Service Agent check brushes and slip rings, and field excitation circuit.
High output at generator power ac re-
ceptacles.
Check engine weld/power speed, and adjust if necessary (see Section 9-5 or 10-5).
Have Factory Authorized Service Agent adjust generator power field current resistor R3.
Low output at generator power ac recep-
tacles.
Check engine weld/power speed, and adjust if necessary (see Section 9-5 or 10-5).
Check fuse F1, and replace if open (see Section 9-7 or 10-8). Have Factory Authorized Service Agent
check integrated rectifier SR1, resistor R3, and capacitor C9.
D. Optional Three-Phase Generator Power (CC/CV Models Only)
Trouble Remedy
No or low output at optional three-
phase generator/receptacle RC5.
Place Process/Contactor switch in Electrode Hot - Stick position (see Section 7-3).
Reset circuit breaker CB7 (see Section 8-2).
Reset circuit breaker CB5 (see Section 9-7 or 10-8).
Check engine weld/power speed, and adjust if necessary (see Section 9-5 or 10-5).
Have Factory Authorized Service Agent check brushes and slip rings, and field current regulator board
PC1.
High output at optional three-phase
generator/receptacle RC5.
Check engine weld/power speed, and adjust if necessary (see Section 9-5 or 10-5).
Have Factory Authorized Service Agent check field current regulator board PC1.
Erratic output at optional three-phase
generator/receptacle RC5.
Have Factory Authorized Service Agent check brushes and slip rings, and field current regulator board
PC1.
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 9-7
or 10-8). Have Factory Authorized Service Agent check engine wiring harness and components.
Check engine wiring harness plug connections.
Have Factory Authorized Service Agent check Engine Control switch S1.