Printed
Circuit
Board
(A 1
):
The printed circuit
board controls the engine start, run, and stop func-
tions. It is mounted behind the control panel. It in-
cludes the following parts:
• Wiring harness connections to the engine,
generator, governor control board and
remote start control
•Start-stop switch (S1);
• Control fuse (F1)
• Relays K1, K2 and K3 (see schematic)
The printed circuit board is not repairable in the
field.
Start/Run/Stop
SWitch
(51):
S1
is
a SPOT rocker
switch, mounted
on
the circuit board, which starts
and stops the generator set. The switch returns to
the center (run) position when released.
Fuse
(F1): This slow-blow 10-amp fuse protects
circuit board A 1 from overcurrent conditions. It is
removable from the front of the control panel.
Spare fuses are inside the fuse holder; use only
Onan-supplied 1 0-amp fuses.
Start Solenoid (K1)
Start solenoid
K1
opens and closes the circuit be-
tween the starter motor and the battery. Two termi-
nals provide connection points to the battery and
starter cables; the battery B+ connection protrudes
through the control panel to the outside
of
the con-
trol housing for convenient access.
Fuel Pump (E3)
Fuel pump
E3
is energized at the same time that
start solenoid
K1
is energized. (Spec D gensets:
7-9
E3
is activated through K4 contacts.) See the set
schematic diagram, in Section
11
of this manual.
Remote Start Control
(A1
;P2/J2) {optional)
The optional remote start control enables the user
to start and stop the set from a remote location. The
deluxe control includes a running time meter and
battery condition meter.
Circuit
Breakers (CB1 and CB2)
The set AC output is supplied for operator use
through circuit breakers
CB1
and CB2, located on
the right side
of
the control housing.
Voltage Regulator (VR1)
The voltage regulator helps stabilize output voltage
under varying loads by providing
DC
excitation volt-
age to the generator rotor. AC voltage is rectified
to
DC
voltage, and the proper DC excitation voltage
is conducted to the rotor in proportion to changes in
demand.
Terminal Board (TB1)
AC output power leads
T1
, T2, T3, and T 4 from the
generator are connected to terminal board
TB1
at
terminals
L 1 -
LO.
Wiring harness
J4
connects
TB1
to voltage regulator
VR1
and circuit breakers
CB1
and CB2.
{Spec D gensets)
Fuel Pump/Autochoke Relay and Fuse
(K4 and F2)
Relay K4 opens and closes the circuit that powers
fuel pump E3 and autochoke K1. A connection to
control assembly A 1 energizes K4. K4 is located on
the rear
of
the air cleaner adapter.
To Next Page
Loading...
Need help?
General
