Miller Electric Big Blue 500 PT, Owner'S Manual

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OM-4429 Page 49
Trouble Remedy
Check and secure connections to Remote 14 receptacle RC14 (see Section 5-11).
Repair or replace wire feeder.
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 supplementary protectors.
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 9-7). 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.
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
receptacles.
Check engine speed, and have Factory Authorized Service Agent adjust if necessary.
Check fuse F1, and replace if open (see Section 9-7). 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 supplementary protector CB7(see Section 8-2).
Reset supplementary protector CB5 (see Section 9-7).
Check engine weld/power speed, and have Factory Authorized Service Agent adjust if necessary.
Have Factory Authorized Service Agent check brushes, 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.
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).
Have Factory Authorized Service Agent check engine wiring harness and components.