Fault Isolation - ESAB EPP-202 Mode D'emploi

Fault Isolation

Fan Not working
Problem
Fan does not turn ON
Torch will Not Fire
Problem
Main Arc Transfers to the work with
a short "pop", placing only a small
dimple in the workpiece.
Arc does not start. There is no arc at
the torch. Open circuit voltage is OK.
52 52
TROUBLESHOOTING
Possible Cause
This is normal when unit is in idle
mode for more than 5 minutes.
Broken or disconnected wire in fan
motor circuit.
Faulty fan(s)
Relay failed to close
Possible Cause
Communication between plasma unit
and CNC or process controller is lost.
CNC or Process Controller removes
the start signal when the main arc
transfers to the work.
Remote current values are not pres-
ent.
Current value is too low.
Open connection between the power
source positive output and the work.
Pilot current and/or start current
should be increased for better starts
when using consumables for 100A or
higher (Refer to process data includ-
ed in torch manuals).
Fault light is ON.
Faulty PCB1 (control board).
Action
None
Repair wire.
Replace fans
Check relay connection and/or replace
relay.
Action
Check communication cable.
Make sure CNC or Process Controller is
sending start signal correctly.
Check if correct current values are
sent down the CAN Bus.
Increase current value.
Repair connection.
Increase pilot current. (Refer to pro-
cess data included in torch manuals).
Check Help Codes table.
Replace PCB1 (control board).