Electrical System, Functional Description; Compressor Shutdown & Warning System, Functional De - Sullair 125 User Manual

SECTION 2
2.13 ELECTRICAL SYSTEM,
FUNCTIONAL DESCRIPTION
The electrical system consists of the basic electrical
elements required to operate the compressor and
also has a system feature that automatically shuts
down the compressor when a malfunction occurs.
The system's components include: an engine starter,
battery, alternator/ voltage regulator, and a fuel
solenoid. It also has a compressor discharge
temperature switch that will shut the compressor
down if the compressor temperature exceeds 250° F
(121° C). It has an engine water temperature switch
set to shut down the compressor when the coolant
temperature reaches 225° F (107° C) and an oil
pressure switch that will shut down the compressor if
the engine oil pressure goes too low. An underspeed
sensor shuts down the compressor if the engine
speed falls below 1500 rpm.
125, 130, 49HP AND 185 USER MANUAL
2.14 COMPRESSOR SHUTDOWN
& WARNING SYSTEM,
FUNCTIONAL DESCRIPTION
The Shutdown System and Annunciator Module
(SSAM) continuously monitors the status of the
compressor. In the event of a shutdown condition,
the SSAM will shut down the compressor and display
(flashing) the appropriate code on the instrument
panel annunciator light. The display will continue
flashing until the ignition switch is turned OFF. The
shutdown codes are:
• One flash: high compressor discharge temperature
• Two flashes: high engine coolant temperature
• Three flashes: low engine oil pressure
• Four flashes: low engine speed
• Five flashes: low fuel level (optional)
The SSAM also provides startup logic for the
compressor. When the ignition switch is in the ON
position, the annunciator light will illuminate for 30
seconds. During this 30 second period, pressing the
ignition switch will engage the engine starter. The low
engine speed switch is inactive during this startup
time interval. By the end of these 30 seconds, the
annunciator light goes out and the engine START
cycle is disabled. At this time the system runs all
safety checks including low fuel level (if installed).
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