Troubleshooting Tables - Miller Bobcat 250 Diesel Owner's Manual

8-7. Troubleshooting Tables

A. Welding
Trouble
Low or no weld output; generator pow-
er output okay at AC receptacles.
No weld output or generator power out-
put at AC receptacles.
Low weld output.
High weld output.
Erratic weld output.
B. Generator Power
Trouble
No or low generator power output at
AC receptacles; weld output okay.
No generator power or weld output.
Low power output at AC receptacles.
High power output at AC receptacles.
Erratic power output at AC recep-
tacles.
.
Complete Parts List is available at www.MillerWelds.com
Check control settings.
Check weld connections.
Check fuse F1, and replace if open (see Section 8-4).
Have Factory Authorized Service Agent check brushes, slip rings, integrated rectifiers SR2 and SR3,
and main rectifier SR1.
Be sure all equipment is disconnected from receptacles when starting unit.
Check fuses F1 and F2, and replace if open (see Section 8-4).
Check plug PLG6 connection.
Have Factory Authorized Service Agent check brushes, slip rings, and integrated rectifiers SR2, SR3.
Check control settings.
Check fuse F1, and replace if open (see Section 8-4).
Check engine speed, and adjust if necessary (see Section 8-6).
Replace air cleaner (see Section 8-2). Replace fuel filters (see Section 8-5).
Have Factory Authorized Service Agent check brushes, slip rings, and integrated rectifiers SR2, SR3.
Check control settings.
Check engine speed, and adjust if necessary (see Section 8-6).
Check control settings.
Tighten and clean connections to electrode and workpiece.
Use dry, properly stored electrodes for Stick and TIG welding.
Remove excessive coils from weld cables.
Clean and tighten connections both inside and outside welder/generator.
Check engine speed, and adjust if necessary (see Section 8-6).
Have Factory Authorized Service Agent check brushes, slip rings, and integrated rectifiers SR2, SR3.
Reset supplementary protectors (see Section 7-1).
Press GFCI receptacle Reset button (see Section 7-2).
Check fuse F2, and replace if open (see Section 8-4).
Have Factory Authorized Service Agent check brushes, slip rings, and integrated rectifier SR3.
Be sure all equipment is disconnected from receptacles when starting unit.
Check fuses F1 and F2, and replace if open (see Section 8-4).
Have Factory Authorized Service Agent check brushes, slip rings, and integrated rectifiers SR2 and
SR3.
Increase Fine control R1 setting to max.
Check fuse F2, and replace if open (see Section 8-4).
Check engine speed, and adjust if necessary (see Section 8-6).
Check fuel level.
Check engine speed, and adjust if necessary (see Section 8-6).
Check receptacle wiring and connections.
Have Factory Authorized Service Agent check brushes and slip rings.
Remedy
Remedy
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