Miller Big Blue 302D Owner's Manual page 46

Trouble
Engine starts, but stops when Magnetic
Shutdown switch is released.
Engine hard to start in cold weather.
Engine suddenly stops.
Engine slowly stopped and cannot be
restarted.
Battery discharges between uses.
Engine idles, but does not come up to
weld speed (models with idle option
only).
Engine does not run at idle speed
(models with idle option only).
Engine uses oil during run-in period;
wetstacking occurs.
OM-497 Page 42
When starting engine, continue holding Magnetic Shutdown switch until after engine indicator lights go
out.
Check oil level. Automatic shutdown system stops engine if oil pressure is too low or engine temperature
is too high (see Sections 4-7 and 8-8).
Use optional starting aid switch (see Section 5-1 or 6-1).
Keep battery in good condition. Store battery in warm area off cold surface.
Use fuel formulated for cold weather (diesel fuel can gel in cold weather). Contact local fuel supplier for
fuel information.
Use correct grade oil for cold weather (see Section 8-1).
Check fuel level.
Check oil level. Automatic shutdown system stops engine if oil pressure is too low or engine temperature
is too high (see Sections 4-7 and 8-8).
See engine manual.
Check fuel level.
Check engine air and fuel filters (see Sections 8-3 and 8-6).
See engine manual.
Turn Engine Control switch off when unit is not running.
Clean top of battery with baking soda and water solution; rinse with clear water.
Recharge or replace battery if necessary.
Periodically recharge battery (approximately every 3 months).
Have Factory Authorized Service Agent check idle module PC7.
Check for obstructed throttle solenoid.
Place Stick/TIG Selection switch (CC models) or Process/Contactor switch (CC/CV models) in Stick
or MIG position.
Check for obstructed throttle solenoid.
Have Factory Authorized Service Agent check idle module PC7, control relays CR3 and CR6, and current
transformer CT1.
Dry engine (see Section 10).
Remedy