Section 10 − Troubleshooting; Troubleshooting - Miller Big Blue 600 Air Pak Owner's Manual

SECTION 10 − TROUBLESHOOTING

10-1. Troubleshooting

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Also see Voltmeter/Ammeter error displays to assist in troubleshooting weld problems (see Section 8-12). Also see Engine Information Display
to assist in troubleshooting engine related problems (see Section 13).
A. Welding
Trouble
No weld output; generator power output
okay at AC receptacles.
No weld output or generator power out-
put at AC receptacles.
Erratic weld output.
High weld output.
Low weld output.
Low open-circuit voltage.
No remote fine amperage or voltage
control.
Constant speed wire feeder does not
work.
OM-279640 Page 70
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Complete Parts List available at www.MillerWelds.com
Place Process/Contactor switch in an Electrode Hot position, or place switch in a Remote On/Off Re-
quired position and connect remote contactor to Remote receptacle (see Section 6-9).
Reset supplementary protector CB3 (see Section 8-11).
Reset supplementary protector CB9 and/or CB29 (see Section 8-11). Check for faulty remote device
connected to Remote receptacle.
Check and secure connections to Remote receptacle (see Section 6-9).
Check fuse F2, and replace if open (see Section 8-11). Have Factory Authorized Service Agent check
brushes and slip rings, weld excitation circuit, and the rotor.
Disconnect equipment from generator power receptacles during start-up.
Reset supplementary protector CB4 (see Section 8-11).
Check fuses F1 and F2, and replace if open (see Section 8-11). Have Factory Authorized Service Agent
check integrated rectifier SR2, capacitor C6, and the rotor.
Have Factory Authorized Service Agent check brushes and slip rings, and field excitation circuit.
Check and tighten connections inside and outside unit.
Be sure connection to work piece is clean and tight.
Use dry, properly stored electrodes.
Remove excessive coils from weld cables.
Have Factory Authorized Service Agent check brushes and slip rings.
Check position of Voltage/Amperage Adjust control.
Have engine Factory Authorized Service Agent check engine speed.
Have Factory Authorized Service Agent check voltage feedback circuit.
Check position of Voltage/Amperage Adjust control.
Have engine Factory Authorized Service Agent check engine speed.
Check fuses F1 and F2, and replace if open (see Section 8-11). Have Factory Authorized Service Agent
check integrated rectifier SR2, capacitor C6, and the rotor.
Have engine Factory Authorized Service Agent check engine speed.
Check position of Process/Contactor switch.
Check and secure connections to Remote receptacle (see Section 6-9).
Repair or replace remote control device.
Have Factory Authorized Service Agent check current sensing devices, and connections.
Reset supplementary protector CB9 or CB29 (see Section 8-11).
Check and secure connections to Remote receptacle (see Section 6-9).
Repair or replace wire feeder.
Remedy