Miller Spectrum 300 Owner's Manual - Page 11
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4-2. Overload Protection: Trouble Lights & Checking Shield Cup Shutdown System
Checking Torch Shield Cup Shutdown System
Power must be reset whenever the cup shutdown system is activated. Al-
ways turn Off power when changing or checking consumables.
1
2
3
4
If certain problems occur, the
Ready light goes off, a trouble light
comes on, and output stops.
1
Pressure Light
Lights if gas/air pressure is below
40 PSI (276 kPa).
Turn power Off, and check for prop-
er gas/air pressure (see Section
3-1).
2
Cup Light
Lights if shield cup is loose.
Turn power Off, and check shield
cup connection (see torch Owner's
Manual). Power must be reset
whenever the cup shutdown is
activated.
Check shield cup shutdown system
once a week.
3
Temperature Light
Lights if power source overheats
(see Section 3-3).
4
Torch Shield Cup
Turn Power On and loosen shield
cup. If shutdown system works
properly, Ready light goes off and
Cup light comes on. If not, turn pow-
er Off and check for proper gas/air
pressure
(see
Section
3-1),
blocked or leaking hose, or loose
shield cup (see torch Owner's Man-
ual).
If system works properly, retighten
cup and reset power.
Ref. ST-181 264-A / Ref. ST-801 300-A
OM-182 702 Page 9