600H, 750, 750H, 750HH, 825, 900, 900H, 1050 T3 CAT User Manual 2: Description
02250197-981 R01
Subject to EAR, ECCN EAR99 and related export control restrictions. 35
2.13 Electrical system, functional
description
The electrical system is comprised of not only the neces-
sary equipment required to operate the compressor, but
also
a system to shut it down in the event of a malfunc-
tion. The components of the electrical system are an
engine st
arter (with an integral solenoid), battery, a
breaker protected alternator with a built-in voltage regula-
tor, a breaker protected engine air inlet heater (for cold
wea
the
r starting), a compressor discharge temperature
sensor and receiver tank temperature switch (both will
shut down the compressor should the compressor tem-
perature exceed 250°F [121°C]), an ambient temperature
se
nsor, an
d a fuel level sensor. This compressor also
incorporates an engine coolant level sensor. This device
is located in the top of the engine radiator. It will shut the
compressor down or prevent it from being started if the
engine coolant level drops too low. In addition, there is a
starter protection relay which prevents accidental starter
engagement after the engine is running or whenever
there is pressure in the receiver tank. Also, should fuel
supply level drop near the bottom of the fuel tank, the
Compass
®
Controller will shut down the machine before
the engine runs out of fuel. There are also several con-
nectors in the main harness that are designed to receive
wiring for factory o
ptions such as remote start, cold
weather louvers, engine air stop valve, and ether start
system. The electrical system also incorporates a lock-
able battery disconnect to be utilized for extended peri-
ods of non use and during machine maintenance. In case
of
emerg
ency, an emergency stop switch is located just
above the Compass Controller on the canopy of the
machine. Section 2.15 o
n pa
ge 37 shows the wiring dia-
gram for the Compass Controller.
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