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Table
7.2.
Troubleshooting
(Continued)
TROUBLE
PROBABLE
CAUSE
REMEDY
No
open-circuit
voltage.
THICKNESS
VOLTS
plug
not
secure
in
receptacle.
Secure
plug
in
receptacle.
Contactor
W
points.
Contact
nearest
Factory
Authorized
Service
Sta
tion.
Gun
switch.
See
gun
Owners
Manual.
Transformer
Ti.
Contact
nearest
Factory
Authorized
Service
Sta
tion.
Plug
PLG2
not
secure
in
recep-
tacle
RC55
(models
with
option
al
Spot
Weld
Panel
only).
Secure
PLG2
into
RC55.
Wire
does
not
feed;
open
circuit
voltage
normal.
Circuit
breaker
CB1
or
CB2.
Reset
CB1
or
CB2
(see
Section
7-6).
Rectifier
SR2.
Contact
nearest
Factory
Authorized
Service
Sta
tion.
Wire
feed
motor
M.
Replace
M.
Spot
weld
timer
does
not
time
out
(models
with
SPW-1
panel).
SPW-1
panel
or
circuit
board
PC5O.
See
Section
7-8,
and
contact
nearest
Factory
Authorized
Service
Station.
Pulsed
wire
feed
operation
not
available.
SPW-i
panel
or
circuit
board
PC5O.
See
Section
7-8,
and
contact
nearest
Factory
Authorized
Service
Station.
SECTION
8
ELECTRICAL
DIAGRAMS
230V.
3
TE
I
64-
84
q
~
POSITIVE
NEGATIVE
Circuit
Diagram
No.
SB-121
827
Diagram
8.1.
Circuit
Diagram
For
MW
4150
Models
OM-113
336
Page
30