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Table 6-2.
Troubleshooting
TROUBLE
CAUSE
REMEDY
Unit
completely moper-
ative;
POWER ON
light
PL1 and READY
light
PL2 both oft.
POWER switch/breaker CB1
tnpped.
.
Contact
Factory
Authonzed Service
Station.
POWER ON
light
PL1
off;
fan
motor
FM does
not
run.
Line disconnect switch in
the OFF
position.
Place line disconnect switch in the ON
position.
Line fuse
or
circuit breaker open.
Check
and
replace
line fuse
or
reset
circuit
breaker.
Power cord
plug
not
secure
in power
receptacle.
Secure power
cord
plug.
Does
not
cut; fan
motor
FM
runs;
POWER
ON
light
PL1 and READY
light
PL2 both
on.
Work
clamp
not
connected.
Connect
work
clamp
to
clean,
bare metal
at
workpiece.
Torch switch
PBI lead
connections.
Check,
clean,
and
tighten
torch switch
lead
connections
(see
Section
6-3).
No
high frequency.
Torch switch
PB1
lead connections.
Check,
clean,
and
tighten
torch switch lead
connections
(see
Section
6-3).
READY
light
PL2
off;
POWER
ON
light
PL1
on.
Fuse
Fl
open.
Check
and
replace
Fl
according
to
Section
6-5.
Shield cup
not
tight
or
shield cup
contact surface
dirty.
Check, clean,
and
tighten
shield cup
on
torch
(see
Section
6-2).
Shield cup
detector lead connections.
Check, clean,
and
tighten
shield cup detector
lead connections
(see
Section
6-3).
Electrode
touching tip
inside torch.
Check
and
tighten
electrode
(see
Section
6-2).
Thermostats TP1 and/or TP2 open
(thermal shutdown).
Allow
a
cooling penod
of
approximately
five
minutes
(see
Section
6-6).
Insufficient
air
pressure
(see
Table
2-1.
Specifications
for
requirements).
Repair
or
replace
air
compressor.
Incorrect air pressure
adjustment.
Adjust
air
filter/regulator (see Step
4
in
Section
5-1).
Dirty
air
filter/regulator.
Clean air
filter/regulator according
to
manufacturers
instructions
(supplied
with
unit).
Fan
does
not run;
POWER ON
light
PU
and READY
light
PL2
both
on.
Fan
motor
FM.
Replace
FM.
OM-296
Page
18
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