CR5 DIODE
t
0
STOP
GND
STRT
COMPONENT
SIDE
FIGURE
7-6
NHEL CONTROL PANEL ASSEMBLY
contacts to produce the following control responses:
0
Closing the K3-9,15 contacts (which parallel the
K4-2,8 contacts) provides an alternate path way for
supplying
B+
to the
T1
ignition coil and fuel sole-
noid valve.
Opening the K3-1,8 contacts disconnects
B+
(CR4 positive terminal) from the generator field
windings.
Closing the K3-2,8 connects
B+
to the run light,
time meter, and battery condition meter.
Opening the K3-9,16 contacts disconnects
B+
from the K4 start relay causing
it
to de-
energize.
De-energizing the K4 relay opens the K4-2,8 and K4-
9,15 relay contacts. Opening
the
K4-2,8 contacts has
no effect since they are in parallel with the closed
K3-9,15 contacts which connect
B+
to the ignition
coil and the fuel solenoid. Opening the K4-9,15 con-
tacts disconnects
B+
from the K1 start solenoid. De-
energizing the K1 start solenoid disconnects
B+
from
the starter motor which stops cranking.
SC-1523
When theSl switch is placed in theRUN position, the
engine continues to run. Relays K2 (generator relay),
K3 (run relay), and
K5
(stop relay) are energized
while relays K1 (start solenoid) and K4 (start relay)
are de-energized. Generator voltage
is
rectified to
DC
by the CR1 power rectifier and supplied to the battery
through the charge resistor (R6). This charges the
battery at a constant rate
(1
ampere maximum) dur-
ing set operation.
Stopping
Placing the Start/Stop/Run switch
(Sl)
in the Stop
position grounds the K3 run relay. This de-energizes
the K3 relay which opens the K3-2,8 and K3-9,15 relay
contacts to disconnect
B+
from
the
ignition coil, fuel
solenoid, run light, meters, and
K5
solenoid.
De-
energizing the K5 relay closes the
K5-30,
87A con-
tacts which holds the K3 rela9 grounded. This pre-
vents the set from restartin-g if the
S1
switch is
released from the Stop position.
Without ignition or fuel, the engine stops. As the
generator output voltage drops, the K2 generator
relay also de-energizes. All components return to
their de-energized position following set shut-down.
CRl prevents the battery from discharging through
the generator windings while the set is stopped.
b
7-1
0
Redistribution or publication of this document
by any means, is strictly prohibited.
Redistribution or publication of this document
by any means, is strictly prohibited.
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