Complete Parts List is available at www.MillerWelds.com
OM-259 355 Page 51
8-14. Troubleshooting
Also see Voltmeter/Ammeter help displays to assist in troubleshooting weld problems (see Section 8-12).
A. Welding
Trouble
Remedy
No weld output; generator power output
okay at AC receptacles.
Place Process/Contactor switch in a Weld Terminals Always On position, or place switch in a Remote
On/Off Switch Required position and turn remote contactor on (see Section 5-15).
Reset supplementary protector CB8 (see Section 8-10). Check for faulty remote device connected to
RC14.
Check and secure connections to Remote Control receptacle RC14 (see Section 5-15).
Check Voltmeter/Ammeter help displays (see Section 8-12).
No weld output, or generator power out-
put at AC receptacles.
Disconnect equipment from generator power receptacles during start-up.
Reset supplementary protector CB3. (see Section 8-10).
Check fuse F1, and replace if open (see Section 8-10). If F1 is open, have Factory Authorized Service
Agent check the voltage regulator module PC3.
Check Voltmeter/Ammeter help displays (see Section 8-12).
Have Factory Authorized Service Agent check brushes and slip rings and field excitation circuit.
Erratic weld output.
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.
High weld output.
Have Factory Authorized Service Agent check main control module PC1 and hall device HD1.
Low weld output.
Check engine speed, and adjust if necessary.
Check fuse F1, and replace if open (see Section 8-10). If F1 is open, have Factory Authorized Service
Agent check the rotor.
Low open-circuit voltage.
Check engine speed, and adjust if necessary.
Have Factory Authorized Service Agent check main control module PC1, field excitation circuit, and main
rectifier.
No remote fine amperage control.
Repair or replace remote control device.
Check and secure connections to Remote Amperage Adjust receptacle RC14 (see Section 5-15).
No 24 volt or 115 volt AC output at Re-
mote receptacle RC14.
Reset supplementary protector CB8 (24 volt) (see Section 8-10).
B. Generator Power
Trouble
Remedy
No generator power output at AC recept-
acles; weld output okay.
Reset receptacle supplementary protector(s) (see Section 7-1). Check and reset GFCI receptacle if ne-
cessary (see Section 7-1).
No generator power or weld output.
Disconnect equipment from generator power receptacles during start-up.
Check fuse F1, and replace if open (see Section 8-10). Have Factory Authorized Service Agent check
field excitation circuit.
Reset supplementary protector CB3 (see Section 8-10).
Check Voltmeter/Ammeter help displays (see Section 8-12).
Have Factory Authorized Service Agent check brushes and slip rings, and field excitation circuit.
High output at generator power AC re-
ceptacles.
Have Factory Authorized Service Agent check field excitation circuit.
Low output at generator power AC re-
ceptacles.
Check engine speed, and adjust if necessary.
Check fuse F1, and replace if open (see Section 8-10). If F1 is open, have Factory Authorized Service
Agent check the rotor.
Summary of Contents for Big Blue 300 PRO Series
Page 33: ... Complete Parts List is available at www MillerWelds com OM 259 355 Page 29 Notes ...
Page 51: ... Complete Parts List is available at www MillerWelds com OM 259 355 Page 47 Notes ...
Page 59: ...OM 259 355 Page 55 240 670 C ...
Page 60: ...OM 259 355 Page 56 Figure 10 2 Circuit Diagram For Welding Generator With Kubota Engine ...
Page 61: ...OM 259 355 Page 57 253 845 B ...
Page 62: ...OM 259 355 Page 58 Figure 10 3 Circuit Diagram For Welding Generator With Mitsubishi Engine ...
Page 63: ...OM 259 355 Page 59 250 149 B ...
Page 74: ...OM 259 355 Page 70 Notes ...
