Section 8 Electrical Diagrams; Diagram - Miller Electric AUTO ARC MW 4150 Owner's Manual

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