Thermo King SB-III 30 SR+, Manual

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Unit Description
The Whisper is a one-piece, self-contained, diesel powered
refrigeration-heating unit. The unit mounts on the front of
the trailer with the evaporator portion extending into the
trailer. The unit uses hot gas to heat and defrost.
Power is provided by the TK 486, a four-cylinder, water
cooled, direct injection diesel engine. The TK 486 displaces
2.09 liters and is rated at 33.9 horsepower (25.3 kilowatts)
at 2200 rpm. An in-line power pack provides direct drive
power transfer from the engine to the compressor. A belt
drive system transfers energy to the fans, the alternator, and
the water pump.
THERMOGUARD µP V Microprocessor
The THERMOGUARD µ P V is a microprocessor control
system designed for a transport refrigeration system. The
µP V integrates the following functions: thermostat, digital
thermometer, hourmeters, oil pressure condition, water tem-
perature gauge, ammeter, voltmeter, tachometer, mode indi-
cator, refrigeration system controller, and diagnostic
system.
The CYCLE-SENTRY system, an integral defrost timer and
data recording are standard features. The refrigeration mod-
ulation system, tracker (a satellite communication system
interface), remote controls and status lights are optional fea-
tures.
The microprocessor mounts inside a weather tight control
box. The LCD display is clearly visible through a transpar-
ent cover. Opening the keypad door provides quick access
to the microprocessor keypad. The keypad is used to control
the operation of the microprocessor.
CYCLE-SENTRY Start-Stop Controls
A CYCLE-SENTRY Start-Stop fuel saving system provides
optimum operating economy. Selecting Continuous or
CYCLE-SENTRY operation (on units equipped with
CYCLE-SENTRY) is accomplished using the microproces-
sor keypad.
WARNING: With the unit On-Off switch in the ON
position, the unit may start at anytime without prior
warning.
NOTE: A buzzer sounds when the unit is automatically
preheating.
NOTE: The microprocessor has a CYCLE-SENTRY
Fresh (CSFR) feature that can lockout CYCLE-SENTRY
operation and force Continuous Run within a program-
mable range of setpoints. If this feature is active and the
setpoint is within the programmed lockout range, the
CYCLE-SENTRY symbol will flash while the unit is auto-
matically starting. After the unit starts, the CYCLE-
SENTRY symbol will disappear and the unit will operate
in Continuous Run as long as the setpoint is within the
programmed lockout range. Refer to the appropriate
THERMOGUARD Microprocessor Controller Operation
& Diagnostic Manual for specific information about the
CYCLE-SENTRY Fresh feature.
The CYCLE-SENTRY system automatically starts the unit
on microprocessor demand, and shuts down the unit when
all demands are satisfied. As well as maintaining the box
temperature, engine block temperature and battery charge
levels are monitored and maintained. If the block tempera-
ture falls below 30 F (-1 C), the engine will start and run
until the block temperature is above 90 F (32 C). If the bat-
tery voltage falls to the programmed limit selected by
CYCLE-SENTRY Battery Voltage (typically 12.2 volts)
and Diesel CYCLE-SENTRY mode is selected, the engine
will start and run until the charge rate falls below that pro-
grammed by CYCLE-SENTRY Amps (typically 5
amperes).