Miller Trailblazer 300D NT Owner's Manual page 39

Trouble
Battery discharges between uses.
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.
Engine uses oil during run-in period;
wetstacking occurs.
Notes
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.
Be sure Engine Control switch S2 is in Run/Idle position.
Remove all weld and auxiliary power loads.
Turn off remote device connected to Remote 14 receptacle RC1 (see Section 4-8).
Check for obstructed movement of solenoid linkage (see Section 7-7).
Check fuse F5, and replace if open (see Section 7-8)
Have Factory Authorized Service Agent check idle module PC1 and current transformer CT1.
Place Engine Control switch in the Run position for small loads.
Dry engine (see Section 9 and engine manual).
Remedy
OM-487 Page 35