Miller Bobcat 250 Diesel, Owner'S Manual

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Complete Parts List is available at www.MillerWelds.com
OM-258413 Page 45
8-7. Troubleshooting Tables
A. Welding
Trouble Remedy
Low or no weld output; generator pow-
er output okay at AC receptacles. 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.
No weld output or generator power out-
put at AC receptacles. 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.
Low weld output. 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.
High weld output. Check control settings.
Check engine speed, and adjust if necessary (see Section 8-6).
Erratic weld output. 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.
B. Generator Power
Trouble Remedy
No or low generator power output at
AC receptacles; weld output okay.
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.
No generator power or weld output. 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.
Low power output at AC receptacles. Increase Fine control R1 setting to max.
Check fuse F2, and replace if open (see Section 8-4).
High power output at AC receptacles. Check engine speed, and adjust if necessary (see Section 8-6).
Erratic power output at AC recep-
tacles. 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.