Onan MJA Series Service Manual page 121

119
60
CONTROL SYSTEM
The plant control system controls starting, stopping, battery recharg­
ing and provides a means of emergency automatic stopping. The con ­
trol system and control system defects can best be analyzed with the
aid of the proper wiring diagram (Sect.
When using ONAN wiring diagrams, remember these paints. The views
shown are modified pictorial. Components are shown in their actual
positions and normally the top view of each component is shown, for ter ­
minal location. Dotted lines show the edges of the control box and indi ­
cate the direction from which it is being viewed,
i.
e. "Top View". All
relays are shown in the de-energized position.
Plant control systems are divided into 2 main types, revolving arma ­
ture plants and revolving field plants. These plants are operated by
Remote start ("R" appears in model, -R).
~...--
~--
........ ~
CURREN7THROUCH,
~ ~
CHARGE RESISTOR
...:xt'
AND 30 AMP RESISTOR
~
PULLS IN STOP RELAY­
, . . -:, BEGINNING
.~ ID-~------.t .~.~-(MJB)
\
START SOLENOID
~\1 ,i
.
START SWITCH <LO"S
I
Q'
i ,.. . \
J
J
GENERA TOR,SERVIN(; )
f).
AS STARTING MOTOR. .,
CRANKS ENGINE
START DISCONNECT
RELAYS CONTACTS
~
______ -AUDWIN'
I 0- "
CURRENT TO
I.iREAK SOLENOID
COIL CIRCU/T­
't:>~
'_''-",':;,...0_ _
l:
ltf
-
Y
ell i! .' . :' - . .
Y .~
EN<mE IGNITION
l
~I~~'
.~~
~.GE;;£RAT;';>
ENGINE STARTS
STARTSOLENOID
VOLTAGE BUILDS UP.
DR:OPSOUT-
CLOSESS7ART {)IS­
CONNECT'R£LA l':'
ENGINE RUNNlNG­
STARTING CYCLE
EN.l>ED.
A790
FIG 6.A .... STARTING CYCLE REVOLVING ARMATURE ­
REMOTE START