Troubleshooting - Miller Big Blue 350 PipePro Owner's Manual

8-12.

Troubleshooting

.
Also see Voltmeter/Ammeter help displays to assist in troubleshooting weld problems (see Section 8-10).
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 control.
No 24 volt AC output at Remote recep-
tacle RC14.
Have Factory Authorized Service Agent check main rectifier and main control module PC1.
Reset supplementary protector CB8 (see Section 8-8). Check for faulty remote device connected to
RC14.
Check and secure connections to Remote Control receptacle RC14 (see Section 5-12).
Check Voltmeter/Ammeter help displays (see Section 8-10).
Disconnect equipment from generator power receptacles during start-up.
Reset supplementary protector CB3. (see Section 8-8).
Check fuse F1, and replace if open (see Section 8-8). If F1 is open, have Factory Authorized Service
Agent check the field excitation circuit.
Check Voltmeter/Ammeter help displays (see Section 8-10).
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.
Have Factory Authorized Service Agent check main control module PC1 and hall device HD1.
Check fuse F1, and replace if open (see Section 8-8). If F1 is open, have Factory Authorized Service
Agent check the rotor.
Have Factory Authorized Service Agent check main control module PC1, field excitation circuit, and main
rectifier.
Repair or replace remote control device.
Check and secure connections to Remote Amperage Adjust receptacle RC14 (see Section 5-12).
Reset supplementary protector CB8 (24 volt) (see Section 8-8).
Remedy
OM-244 620 Page 45