Section 2
DESCRIPTION
18
psig (5.9 to 7.6 bar) or 85 to 160 psig (5.9 to
11.0 bar).
• The cold weather starting aid should be
used when starting in cold amibients. Press
the button and hold for 5-10 seconds prior
to starting (depending upon temperature).
• The annunciator light indicates compres-
sor safety shutdown status.
2.9 ELECTRICAL SYSTEM, FUNCTIONAL DESCRIP-
TION
Refer to Figure 2-7. The electrical system is com-
prised of not only the necessary equipment
required to operate the compressor, but also a sys-
tem which shuts down the compressor in the event
of a malfunction. The components of the electrical
system are an engine starter, a battery, an alter-
nator with a built-in voltage regulator, a fuel
solenoid, a compressor discharge temperature
switch, which will shut down the compressor
should the compressor temperature exceed 250°F
(121°C), an engine water temperature switch set
to shut down the compressor when water tempera-
ture reaches 225°F (107°C) and an engine oil
pressure switch. The engine oil pressure switch is
provided to shut down the compressor when the
engine oil pressure becomes insufficient.The low
speed switch is provided to shutdown the compres-
sor if engine speed falls below 1500 RPM.
2.10 SHUTDOWN SYSTEM DESCRIPTION
The Shutdown System and Annunciation Module
(SSAM) continually monitors the status of the com-
pressor . In the event of a shutdown condition, the
SSAM will shutdown the compressor and flash the
appropriate code on the instrument panel annunci-
ator light. The flash code will remain active (flash-
ing) until the ignition switch is turned OFF. The
flash codes are as follows:
1 flash : high compressor temperature
2 flashes: high engine coolant temperature
3 flashes: low engine oil pressure
4 flashes: low engine speed
5 flashes: low fuel level (optional)
The SSAM also provides startup logic for the com-
pressor. When the ignition switch is placed in the
ON position, the annunciator light will come on for
30 seconds. During this 30 second period, ignition
switch activation to the START position will engage
the engine starter. The low engine oil pressure
switch and the low engine speed switch will remain
inactive during the this 30 second period. At the
end of the 30 second period, the annunciator light
will go off and the engine START cycle will be dis-
abled. At this time, all safety system checks
become active including low fuel level (if
equipped).
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