Miller Electric UPC 838 manual Trouble Lights, Checking Shield Cup Shutdown System

6-2. Trouble Lights

Difficulty establishing pilot arc may indicate consumables need to be cleaned or replaced.

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1 Pressure Light

Lights if gas/air pressure is below 50 PSI (345 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.

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 (see Section 6-3).

3 Temperature Light

Lights if power source overheats (see Section 4-2).

6-3. Checking Shield Cup Shutdown System

. Power must be reset whenever the cup shutdown system is activated. Always turn Off power when changing or checking consumables.

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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-202 515 Page 21