Miller Millermatic 251 Owner's Manual page 31

Trouble
No wire feed.
Remedy
Change to correct size drive rolls (see Section 6-3).
Readjust drive roll pressure (see Section 4-13).
Replace inlet guide, contact tip, and/or liner if necessary (see welding gun Owner's Manual).
Check position of input jumper links (see Section 4-10).
Have Factory Authorized Service Agent check main control board.
Turn Wire Speed control to higher setting (see Section 5-1).
Clear obstruction in gun contact tip or liner (see welding gun Owner's Manual).
Readjust drive roll pressure (see Section 4-13).
Change to correct size drive rolls (see Section 6-3).
Rethread welding wire (see Section 4-13).
HL.P 002 appears on meters. Thermistor T is detecting an overheating condition. Wait for unit to cool
allowing the fan to run. After unit is cool, If HL.P 002 message remains, contact Factory Authorized
Service Agent (see Section 6-2).
HL.P 004 appears on meters. Reset message by releasing the trigger or removing stuck wire causing
short circuit (see Section 5-2) . If message remains, have Factory Authorized Service Agent check for
shorted trigger leads.
HL.P 005 appears on meters. Wire feed malfunction. Check wire feed delivery system.
Check gun trigger and leads. Repair or replace gun if necessary.
Have Factory Authorized Service Agent check main control board.
OM-1326 Page 27