Miller Electric Big 40 CX - Manual (Page 51)

OM-4427 Page 47
Trouble Remedy
Low CV weld output. Set Ampere Range switch to highest range.
Increase Voltage/Amperage Adjust Control setting.
Min or max CV weld output only. Check position of Voltage/Amperage Adjust control and Voltage/Amperage Adjust switch.
Repair or replace remote control device.
Have Factory Authorized Service Agent check Amperage/Voltage Adjust Control R1, and field current
regulator board PC1.
C. Standard Generator Power
Trouble Remedy
No generator power output at ac recep-
tacles; weld output okay.
Reset receptacle circuit breakers.
Reset GFCI receptacle.
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 9-8). Have Factory Authorized Service Agent
check integrated rectifier SR1, capacitor C9, diode/capacitor board D1/C1, and the rotor.
Reset circuit breaker CB12. Have Factory Authorized Service Agent check diode D1 .
Have Factory Authorized Service Agent check brushes and slip rings, and field excitation circuit.
High output at generator power ac re-
ceptacles.
Check engine speed, and have Factory Authorized Service Agent adjust if necessary.
Have Factory Authorized Service Agent adjust generator power field current resistor R3.
Low output at generator power ac recep-
tacles.
Check engine speed, and have Factory Authorized Service Agent 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.
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 Weld Terminals Always On - 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 have Factory Authorized Service Agent adjust if necessary.
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 have Factory Authorized Service Agent adjust if necessary.
Have Factory Authorized Service Agent check field current regulator board PC1, and PC1 voltage
feedback circuit.
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.