Miller Electric Big 40 CAT Owner's Manual page 58

Trouble
Min or max CV weld output only.
C. Standard 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.
D. Optional Three-Phase Generator Power (CC/CV Models)
Trouble
No or low output at optional three−
phase generator/receptacle RC5.
High output at optional three−phase
generator/receptacle RC5.
Erratic output at optional three−phase
generator/receptacle RC5.
E. Engine
Trouble
Engine will not crank.
OM-4406 Page 52
Check position of Voltage/Amperage Adjust control and Voltage/Amperage Adjust switch.
Repair or replace remote control device.
Have Factory Authorized Service Agent check field current regulator board PC1.
Reset receptacle circuit breakers.
Disconnect equipment from generator power receptacles during start-up.
Check fuses F1 and F2, and replace if open (see Section 9-8). 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 9-8).
Have Factory Authorized Service Agent check brushes and slip rings, and field excitation circuit.
Check engine speed, and adjust if necessary.
Have Factory Authorized Service Agent adjust generator power field current resistor R3.
Check engine speed, and adjust if necessary.
Check fuse F1, and replace if open (see Section 9-8). Have Factory Authorized Service Agent check inte-
grated rectifier SR1, resistor R3, and capacitor C9.
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 9-8).
Check engine weld/power speed, and adjust if necessary (see Section 9-6).
Have Factory Authorized Service Agent check brushes and slip rings, and field current regulator board
PC1.
Check engine weld/power speed, and adjust if necessary (see Section 9-6).
Have Factory Authorized Service Agent check field current regulator board PC1.
Have Factory Authorized Service Agent check brushes and slip rings, and field current regulator board
PC1.
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 9-8).
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.
Return To Table Of Contents
Remedy
Remedy
Remedy
Remedy