Miller SuitCase 12RC CE Owner's Manual page 27

Trouble
Wire does not feed until trigger is
pressed but continues to feed after trig-
ger is released.
Gas valve rattles loudly and wire feeds
slowly or erratically.
Gas does not flow or does not stop flow-
ing; wire feeds.
Motor runs slowly.
When triggered; gas flows, wire feeds
but no contact closure at welding power
source.
Notes
Check for short between gun trigger leads and weld cable. Repair or replace gun trigger leads.
Check setting of trigger hold switch (If applicable).
Check for short between gun trigger leads and weld cable. Repair or replace gun trigger leads.
Clear blockage in gas hose or replace hose.
Clear blockage in welding gun.
Clear blockage in filter (see Section 7-3).
Check gas valve.
Check coil voltage and connections of gas valve GS1. Check continuity of coil. Replace GS1 if necessary.
Have Factory Authorized Service Agent check Control board PC1.
Check and replace contact tip or liner if necessary (see gun owners manual).
Have Factory Authorized Service Agent check Control board PC1.
Hub tension set too high (see Section 5-7).
Overheating of bus bar. Allow feeder to cool, reduce weld amperage or duty cycle.
Remedy
OM-263984 Page 23