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33
Operating Instructions
SMART REEFER 4 (SR-4)
Control System
Thermo King has applied the latest advances in
computer technology to develop a device that
controls temperature and unit function, and
displays operating information quickly and
accurately.
There is nothing complicated about learning to
operate the SR-4 Controller, but you will find that
a few minutes studying the contents of this
manual will be time well spent.
The microprocessor components are located
inside the control box, which is located inside the
lower roadside service door. The microprocessor
is connected to an HMI (Human Machine
Interface) Control Panel. It is used to operate the
unit. The USB port is used to retrieve data from
the data logging system.
Microprocessor On/Off Switch
This switch supplies or removes electrical power
to the microprocessor. It is located above HMI
Control Panel. It is hidden when the lower
roadside body panel surrounding the Control Box
is closed.
HMI Control Panel
Use the HMI control panel to operate the unit.
Refer to the Precedent C-600 Operator’s Manual
TK 55538 and the SR-4 Microprocessor Control
System Diagnostic Manual TK 55533 for more
information.
The HMI control panel has a display and eight
touch sensitive keys. The display is capable of
showing both text and graphics. The four keys on
the left and right sides of the display are “hard”
(dedicated) keys. The four keys under the display
are “soft” keys. The function of “soft” keys
change depending on the operation being
performed. If a soft key is active, its function will
be shown in the display directly above the key.
WARNING: Do not operate the SR-4 until
you are completely familiar with the
location and function of each control.
1.
Control Box
3.
Flash Drive Only
USB Port
2.
Microprocessor
On/Off Switch
4.
HMI Control Panel
Figure 15: Control Box With Service Door Open
FLASH DRIVE
ONLY
MENU
35
°F
35
SET
SENSORS
GAUGES
POINT
.8
THERMO KING
ON
OFF
SR4
Smart Reefer 4
MICRO
PROCESSOR
OFF
ON
ARA2120
1
2
4
3
WARNING: The unit can start at any time
without warning. Press the
O
FF
key on the
HMI control panel and place the
microprocessor On/Off switch in the Off
position before inspecting or servicing any
part of the unit.