Miller PORTA-MIG Manuel du propriétaire - Page 31
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Table
7-2.
Troubleshooting
TROUBLE
CAUSE
REMEDY
Depressing
gun switch
will
not
energize
wire feeder. Electrode
wire
is
not
energized
and
shielding
gas does
not
flow.
Fuse Fl.
Check
and
replace
Fl if
necessary
(see
Section
7-5).
Circuit breaker CB1.
Reset CB1
according
to
Section
7-5.
POWER switch Si.
Place switch
Si
in
the ON
position.
Check
Si,
and
replace
if
necessary.
Plug
from gun
trigger
is
not
se-
cure
in
TRIGGER
receptacle
RC2.
Insert
plug fully
into
TRIGGER
receptacle RC2,
and
rotate collar
clockwise.
~
115
vac/contactor
control
plug
PLG7
is
not
secure
in recep-
tacle
on
welding
power
source.
Insert PLG7
fully
into
115
vac
receptacle,
and
ro
tate
threaded collar
fully
clockwise.
Coil of
relay
CR1.
Check
coil of
relay CR1,
and
replace
CR1
if
nec
essary.
Gun
trigger
or
gun
trigger
cord.
Checkguntriggerandcord,andreplaceifneces
sary.
Wire
feeds,
shielding
gas
flows,
but electrode wire is
not
ener-
gized.
115
vac/coritactor
control
plug
PLG7 is
not
secure
in contactor
receptacle
on
welding
power
source.
Insert PLG7
fully
into
receptacle,
and
rotate
threaded collar
fully
clockwise.
Welding
power
source.
See
Troubleshooting
Section
in
welding
power
source
Owners
Manual.
Wire does
not
feed,
shielding
gas
flows,
and wire is
ener
gized.
Circuit breaker CB1.
Reset CB1
according
to
Section
7-5.
Motor Control Board PCi.
See
handling
precautions
in
Section
7-6,
and
contact nearest
Factory
Authorized
Service Sta
tion.
Wire feeds
erratically
or
stops
feeding
while
welding.
Circuit breaker CB1.
Reset CB1
according
to
Section
7-5.
.
Fuse Fl.
Replace
Fl
(see
Section
7.5).
Sharp
or
excessive band
in
gun
cables
or
liners,
Straighten
gun cables and/or
replace
liners
(see
gun Owners
Manual).
Incorrect drive roll pressure.
Adjust
drive roll pressure
(see
Section
4-5).
Incorrect hub tension.
Readjust
hub tension
(see
Section
4-9).
Contact
tube
opening
re-
stricted;
burnback
or
wire into
tube.
See gun Owners
Manual.
Friction
in
gun.
See gun Owners
Manual.
Gun
casing
liner
dirty,
re-
stricted.
See gun Owners
Manual.
Broken
or
damaged casing
or
liner.
See
gun Owners
Manual.
Drive rolls
worn or
slipping.
Replace
drive rolls
(see
Section
4-5).
Excessive
loading
of drive
mo-
tor.
Clear restriction
in
drive
assembly.
Wire drive rolls
misaligned.
Realign
drive rolls
(see
Section
7-3).
Drive
motor
brushes.
Replace
brushes
(see
Section
7-4).
Gun
trigger
switch
or
switch
leads.
Check
connections;
replace
switch
(see
gun
Owners
Manual).
OM-1220
Page
25