Miller Electric 301 G, DC Owner's Manual page 48

Trouble
Engine does not start.
Engine starts but stops when Engine
Control switch returns to Run/Idle
position.
Battery discharges between uses.
Engine stopped during normal
operation.
Engine does not return to idle speed.
Engine does not remain at weld/power
speed when power or weld load is
applied with Engine Control switch in
Run/Idle position.
OM-4407 Page 44
Check fuel level (see Section 5-2 or 5-3).
Check battery and replace if necessary.
Check engine charging system according to engine manual.
Have Factory Authorized Service Agent check fuel shutoff solenoid GS1 according to engine manual
(GS1 standard on Kohler-powered units; optional on Robin-powered, LP-fueled units).
See engine manual.
Check oil level (see Section 5-2 or 5-3). Low oil pressure shutdown stops engine if oil pressure is too
low.
Use correct grade oil for operating temperature. (see Section 8-1 or 9-2).
Have Factory Authorized Service Agent check low oil pressure shutdown switch S5.
Place Engine Control switch in Off position when unit is not running.
Clean top of battery with baking soda and water solution; rinse with clear water.
Periodically recharge battery (approximately every 3 months).
Replace battery.
Check voltage regulator according to engine manual.
Check fuel level (see Section 5-2 or 5-3).
Check oil level (see Section 5-2 or 5-3). Low oil pressure shutdown stops engine if oil pressure is too
low.
Have Factory Authorized Service Agent check fuel shutoff solenoid GS1 according to engine manual
(GS1 standard on Kohler-powered units; optional on Robin-powered, LP-fueled units).
Have Factory Authorized Service Agent check low oil pressure shutdown switch S5.
Be sure Engine Control switch S2 is in Run/Idle position.
Remove all weld and generator power loads.
Place Process/Contactor switch in Electrode Hot position or turn off remote contactor. The unit will not
return to idle speed when Process/Contactor switch is in a remote position and the remote contactor
is on.
Turn off remote device connected to Remote receptacle RC4 (see Section 5-9).
Check for obstructed movement of solenoid linkage (see Section 8-7 or 9-6).
Have Factory Authorized Service Agent check circuit board PC1 and current transformer CT1.
Place Engine Control switch in the Run position for small loads.
Check for obstructed movement of solenoid linkage (see Section 8-7 or 9-6).
Remedy