ESAB Plasmarc EPP-601, Manual

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43
section 6 troubleshootinG
6.3.6 torch will not fire
problem possible cause action
Main Arc Transfers to the work with a
short “pop”, placing only a small dimple
in the work.
Remote control removes the start
signal when the main arc transfers to
the work.
Panel/Remote switch in “Remote” with
no remote control of the current
Place Panel/Remote switch in “Panel”
position
Remote current control present but
signal missing.
Check for current reference signal at TB1-
4(+) and TB1-5(-). See Signal vs. Output
Current Curve this section.
Current pot set too low. Increase current pot setting.
Start current pot, located behind the
cover for the control PCB is set too
low.
Increase the start current post setting
to “7”.
Arc does not start. There is no arc at the
torch. Open circuit voltage is OK.
Open connection between the power
source positive output and the work.
Repair connection
Fuse F6 in the Pilot arc circuit is blown. Replace F6
Fuse F7 in the pilot arc circuit is blown. Replace F7
Pilot arc High/Low switch is in the ”LOW”
position when using consumables for
100A or higher (Refer to process data
included in torch manuals)
Change Pilot arc to “High” position.
(Refer to process data included in torch
manuals)
Pilot arc contactor (K4) faulty. Replace K4
Faulty PCB1 Replace PCB1 P/N 0558038313