Thermo King UT-1200, Manual

Page: 28 / 169

Unit Description
28
Mechanics HMI Control Panel
The Mechanics HMI Control Panel is available as
a hand held diagnostic tool. It is used on units
with a Standard HMI Control Panel if it is
necessary to access the Maintenance Menu or the
Guarded Access Menu to service the unit. Refer to
the SR-3 Truck Single Temp Diagnostic Manual
TK 55208 for more information about the
Mechanics HMI Control Panel.
NOTE: The Mechanics HMI Control Panel and
the Premium HMI Control Panel look the same
and have the same functionality. The Mechanics
HMI Control Panel i
s
enclosed in a protective
housing.
Figure 2: Mechanics/Premium HMI Control Panel
Premium HMI Control Panel
(Optional)
The Premium HMI Control Panel is available as
an option that replaces the Standard HMI Control
Panel. It is used operate the unit and display unit
information. It also provides access to all the
controller functions and menus. Refer to the SR-3
Truck Single Temp Diagnostic Manual TK 55208
for more information about the Premium HMI
Control Panel.
CYCLE-SENTRY
TM
Start/Stop
System
The CYCLE-SENTRY Start/Stop fuel saving
system provides optimum operating economy.
The CYCLE-SENTRY system automatically
starts the unit on microprocessor demand and
shuts down the unit when all demands are
satisfied.
The system monitors and maintains the
compartment temperature, the engine block
temperature, and battery charge levels at a point
where quick, easy starts are possible.
DAS - Data Acquisition System
(Optional)
The DAS (Data Acquisition System) monitors and
records the temperatures of (up to) six additional
sensors. The sensors are independent from the
microprocessor controller and are normally
located in the truck box to monitor load
temperatures. DAS data can be downloaded
through a serial port to an IBM
®
PC compatible
computer. WinTrac™ 4.0 (or higher) software is
used to view and analyze the data. Brief reports
can be printed on a microprinter connected to the
serial port.
Unit Protection Devices
Battery Fuse:
The battery fuse is a 60 amp fuse
that protects the 2 circuit. It is located in a fuse
holder in the 2 wire near the battery.
Fuses:
A number of fuses are used. Sizes and
functions are described in the Specifications
section of this manual.
High Pressure Cutout Switch (HPCO):
This
normally closed switch monitors the discharge
pressure at the compressor. It opens on high
discharge pressure to shut the unit down to
prevent damage.
Low Oil Level Sensor:
The low oil level sensor
detects if the oil drops below a certain level. If it
stays below that level for a specified time, the
microprocessor will shut the unit down and record
alarm code 66 (normal code when changing oil).
Compressor Temperature Sensor:
This sensor
provides a compressor temperature input to the
microprocessor. If the compressor temperature is
too high, the controller stops the unit and records
an alarm.
Coolant Temperature Sensor:
This sensor
provides an engine coolant temperature input to
the microprocessor. If the engine coolant
temperature is too high, the controller stops the
unit and records an alarm.
WARNING: Turn the unit off by pressing
the
OFF
key before opening doors or
inspecting any part of the unit. The unit
can start at any time without warning if it
has been turned on by pressing the
ON
key.