ESAB Esp-1000 Plasmarc System Manual De Instrucciones página 312

section 5
5.4 troubleshooting Guide (con't.)
Problem
4. No pilot arc - (cont)
5. No arc transfer.
6. No preflow.
Probable Cause
Shield gas flow switch not
activated.
Blown fuse in pilot arc or
starting circuits.
Insufficient Open Circuit
Voltage (OCV).
Gas flow improperly set.
Standoff too high or torch
centered off edge of work.
Poor connection to work-
piece.
Thick mill scale or non-con-
ductive surface on work.
Power source current set-
ting too low.
Defective power source.
No start signal.
Emergency stop signal
open.
Door opened on plumbing
box allowing interlock to
open.
Shorted, closed or jumpered
out shield gas flow switch.
No cooling water.
N pressure switch not
2
activated.
O pressure switch not
2
activated when N /O switch
2 2
is set to O .
2
312
tRoUBLesHootinG
Remedy
Check for adequate shield gas flow. Check shield
gas flow switch.
Refer to power source manual.
Refer to power source manual.
Refer to Subsections 4.1 and 4.2.
Check cutting technique or position torch to be
over work.
Check connection.
Clean mill scale or ensure conductive surface
on work.
Refer to power source manual.
See power source manual.
Check input 0 on PLC in flow control. Should
be lit when receiving start signal. Ensure
qualified technician performs this check.
Check input 10 on PLC in flow control. Should
be lit to enable operation. Ensure qualified
technician performs this check.
Close door.
Check input 6 on PLC. Should be off before
start signal applied. Should be on when in
test. Ensure qualified technician performs
this check.
Check flow switch.
100 psig N (gas flowing) should be supplied to
2
the flow control.
100 psig O (gas flowing) should be supplied to
2
the flow control.