Lincoln Electric IM944 POWERTORCH PLASMA 20 - Manual (Page 19)

E-2 TROUBLESHOOTING E-2
POWERTORCH™ PLASMA 20
Observe all Safety Guidelines detailed throughout this manual
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
CAUTION
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
GREEN LED OFF, Fan not operat-
ing. No Input Power.
GREEN LED ON, YELLOW
Overtemperature / under pressure
LED ON. Unit is overheated.
GREEN LED ON, YELLOW Over
temperature / under pressure LED
blinks. No air flow in purge or pre-
flow.
GREEN LED ON, YELLOW Over
temperature / under pressure LED
OFF, no air flow when torch switch
pressed.
GREEN LED ON, YELLOW Over
temperature / under pressure LED
OFF. Air flows, Pilot arc does not
start.
Torch has pilot arc but does not cut.
1. Plug unit into 115V outlet.
2. Reset Breaker.
1. Make sure the unit has not been
operated beyond duty cycle limits.
2. Air Flow obstructed.
1. Air not connected or pressure too
low. Check source for at least
72.5 PSI (5 Bar) during purge or
pre-flow, adjust air pressure to 65
PSI (4.5 Bar).
2. Air filter or air line blocked, torch
blocked. Replace filter cartridge.
Check that air line and torch leads
are free of twists and kinks.
1. Shield cup not properly installed
on torch. Check that shield cup is
fully seated against torch.
2. Faulty Torch Switch or Parts
Assembly in torch holder. Refer to
“Operations Section” (Torch
Consumable Parts).
3. Faulty Main PC Board Repair /
Replace Power Supply.
1. Faulty torch parts. Inspect torch
parts and replace if necessary.
2. Faulty main PC Board. Repair /
replace.
1. Work lead not connected. Make
sure work lead is connected
securely to bare metal.
2. AC input power too low. Use
shortest distance to breaker panel
possible.
3. Faulty Main PC Board.
Repair/Replace.
If all recommended possible areas of
misadjustment have been checked
and the problem persists, Contact
your local Authorized Field
Service Facility.