Fault Isolation; 10.3.1 Fans Not Working; 10.3.2 Torch Will Not Fire - ESAB EPP-360 Instruction Manual

US
10.3

Fault Isolation

10.3.1 Fans not working

Problems
All 3 fans do not run
1 or 2 fans do not run.

10.3.2 Torch will not fire

Problems
Main Arc Transfers to the work
with a short "pop", placing only
a small dimple in the work.
Arc does not start. There is no
arc at the torch. Open circuit
voltage is OK.
bp12a3
Possible cause
This is normal when not cutting.
Fans run only when "Contactor
On" signal is received.
Broken or disconnected wire in
fan motor circuit
Faulty fan(s)
Possible cause
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
Remote current control present
but signal missing.
Current pot set 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 included in torch
manuals)
Faulty PCB1
- 37 -
Action
None
Repair wire.
Replace fans
Action
Place Panel/Remote switch in
"Panel" position
Check for current reference
signal between J and L on 24
pin receptacle - should be
between 0.5 - 10 volts (10 volts
= 360 amps)
Increase current pot setting.
Repair connection
Increase pilot current. (Refer to
process data included in torch
manuals)
Replace PCB1
© ESAB AB 2010