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Miller plasma fault light problem

tnmgcarbide

Diamond
Joined
Jul 6, 2004
Location
N. GA- 33.992N , -83.72W usa
i have a spectrum 625 plasma machine that is giving a Temp fault light . when i turn the machine on
from cold @ around 55 deg - the air and cup lights go out , but the temp light stays lit and the thing won't
start . if i leave it idling long enough , the light will go out and i can get it to spray for about 2 seconds before it quits and the temp faults again.

i haven't used the machine in about a year - are there relays, contactors or sensors i should inspect
when i pull the covers ? i have the miller schematic, but it is more of ageneral wiring diagram and
of little help to me.
 
It probably has a mechanical thermal switch somewhere in there that could use replacing. Think of where it would get hot and look for a little thing with two wires. Could be a metal can, could be a little tube, could be bolted to a transformer or heatsink or in the airflow.
 








 
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