NHEL CONTROL DESCRIPTION
The NHEL generator set control (see Figures7-4and
7-5) consists of the following components:
Printed Circuit Board Assembly
Panel Mounted Start/Run/Stop Switch
(Sl)
Start Solenoid (Kl)
Battery Charger Resistor (R6)
Optional Remote Start Control
Stop Relay (K5)
Blocking Diode (CR5)
The first five components listed for the
NHEL
control
are either the same or similar to the components in
the NHEcontrol. Referto
NHE
Control in thissection
and Figure7-6forageneral description
of
the printed
circuit board assembly, panel mounted Start/Run/
TO IGNITION
COIL
B+
(From
K5-85)
Stop switch, start solenoid, battery charge resistor,
and remote start control. The following sections pro-
vide a description
of
the stop relay and blocking
diode.
Stop
Relay
(K5)
The K5 stop relay is used to latch off the generatorset
when the Start/Run/Stop switch
(Sl)
is placed in the
Stop position. This prevents the set from restarting
when the switch is momentarily placed in the Stop
position and then released. The K5 relay mounts on
the air cleaner adapter.
Blocking Diode
(CR5)
The CR5 blocking diode is used to protect the control
circuitry from reverse-flow transient currents. When
the set is shut down, various magnetic fields within
the generator collapse. This causes transient cur-
rents that can damage the control
if
not blocked. The
CR5 diode is spliced into the control wiring harness
between the circuit board assembly and Start/Run/
Stop switch.
SC-1520
FIGURE
7-4.
NHEL
CONTROL
7-8
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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