Trouble Lights; Checking Shield Cup Shutdown System - Miller Electric Spectrum 1251 Owner's Manual

7-2. Trouble Lights

7-3. Checking Shield Cup Shutdown System

1
.
A complete Parts List is available at www.MillerWelds.com
Difficulty establishing pilot arc may indicate
consumables need to be cleaned or replaced.
.
Power must be reset whenever the cup shutdown
system is activated. Always turn Off power when
changing or checking consumables. Do NOT
overtighten torch shield cup. Gently finger tight-
en cup onto torch.
1 Pressure Light
Lights if gas/air pressure at torch is
below 50 PSI (344 kPa) or above 90
PSI (620 kPa).
Turn power Off, and check for prop-
er gas/air pressure (see Section
5-2).
2 Cup Light
Lights if shield cup is loose.
1
Turn power Off, and check shield
cup connection (see torch Owner's
2
Manual). Power must be reset
whenever the cup shutdown is
activated.
3
Check shield cup shutdown system
once a week (see Section 7-3).
3 Temperature Light
Lights if power source overheats
(see Section 4-2).
1 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, immedi-
ately turn Off power and have Fac-
tory Authorized Service Agent
check safety control board PC1 op-
eration.
If system works properly, retighten
cup and reset power.
Ref. 801 300-A
OM-201 872 Page 39