GMC 1976 ZEO 6083 Maintenance Manual page 725

24C- 48 ONAN MOTOR GENERATOR
0
ONAN
To, .
l YOuns
q, E :ECTR17 PP v,LR
lil
u~lpll
.IIII~1
STQP
RUNNING TIME
METER
TO STOP
TO GND
TO START
LAMP
(GLOAS wHEN UNIT
IS RUNNING)
SCHEMATIC
SOLDERLESS
CONNECTORS OR
TERMINAL BLOCK
TERMINALS ON GENERATOR
BACK SIDE OF
REMOTE CONTROL 2
SWITCH
4::5:
iA
JUNCTION BOX
TOP
2 3 4
PRINTED CIRCUIT BOARD
-6 J
A-4962
seconds for a low oil pressure shutdown . If a low oil
condition occurs, the low oil
pressure
Figure 92-Control Panel Wiring
Figure 91-Remote Control Switch
pressure
switch S2 closes to charge capacitor C3 through re-
sistor R3 . When the voltage on capacitor C3 matches
the voltage of the divider RS-R6, the programmable
unijunction transistor Q 1 "fires" to trigger CR8.
CR8 turns on to de-energize K3 relay. K2 contacts
open as the engine stops and CR8 turns off.
EMERGENCY START-STOP OPERATION
In an emergency situation the control board, ei-
ther normal or defective, can be bypassed to start or
stop the unit . To completely bypass all control board
functions connect a jumper from terminals 9 to 11 .
This energizes the ignition and fuel pump . Then tem-
porarily jumper terminals 1 and 7 to energize starter.
Remove this jumper as soon as the engine starts and
runs . DO NOT reconnect this jumper while the en-
gine is running. To stop, remove the jumper from
terminals 9 and 11 .
CAUTION : This emergency operation DOES
NOT provide fuse protection, start discon-
nect or low oil pressure shutdown and
should not be used without monitoring the
motor generator.
Printed Circuit
Board Terminal
Switch
Terminal Function
1 1 Ground
-
Stop
3
3 Start
6
6
Lamp & Running
Time Meter