Miller Electric Big Blue 400P Owner's Manual page 57

Trouble
No remote fine amperage or voltage
control.
Constant speed wire feeder does not
work.
Low CV weld output.
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 Only)
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.
Repair or replace remote control device.
Have Factory Authorized Service Agent check PC1 sensing leads (36 and 37), and connections.
Reset supplementary protector CB5 or CB6 (see Section 9-8).
Check and secure connections to Remote 14 receptacle RC14 (see Section 5-11).
Repair or replace wire feeder.
Set Ampere Range switch to highest range.
Increase Voltage/Amperage Adjust Control setting.
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.
Reset receptacle supplementary protectors.
Reset GFCI receptacle.
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 supplementary protector CB12. Have Factory Authorized Service Agent check diode D1 .
Have Factory Authorized Service Agent check brushes and slip rings, and field excitation circuit.
Check engine speed, and have engine manufacturer's factory authorized service agent adjust if neces-
sary. See Section 9-6 for idle speed adjustment.
Have Factory Authorized Service Agent adjust generator power field current resistor R3.
Check engine speed, and have engine manufacturer's factory authorized service agent adjust if neces-
sary. See Section 9-6 for idle speed adjustment.
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 Weld Terminals Always On - Stick position (see Section 7-3).
Reset supplementary protector CB7(see Section 8-2).
Reset supplementary protector CB5 (see Section 9-8).
Check engine speed, and have engine manufacturer's factory authorized service agent adjust if nec-
essary. See Section 9-6 for idle speed adjustment.
Have Factory Authorized Service Agent check brushes and slip rings, and field current regulator board
PC1.
Check engine speed, and have engine manufacturer's factory authorized service agent adjust if nec-
essary. See Section 9-6 for idle speed adjustment.
Have Factory Authorized Service Agent check field current regulator board PC1, and PC1 voltage
feedback circuit.
Have Factory Authorized Service Agent check brushes and slip rings, and field current regulator board
PC1.
Remedy
Remedy
Remedy
OM-4421 Page 51