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2.5 System Operating Controls and Components
Temperature control is provided by the Carrier Transicold APX™ Control System. Once the system is set at the
desired temperature, the unit will operate automatically to maintain the desired temperature within very close limits.
2.5.1 Multiple Languages
Messages in the MessageCenter can be displayed in several different languages. Refer to Section 3.13 for more
information on language selection.
2.5.2 Automatic Start-Stop
Standard equipment includes an auto start-stop feature. This feature provides automatic cycling of the diesel
engine or compressor, which in turn offers an energy efficient alternative to continuous operation of the system with
control of temperature accomplished by alternate cooling and heating of the supply air (evaporator outlet air).
2.5.3 Special Features
The following additional special features are incorporated into the Carrier Transicold APX Control System:
• An easy to read MessageCenter which clearly
displays all required information
• Unit Data and Advanced User selectable Func-
tional Parameters
• Programmable Maintenance Hour Meters
• Bright LED Alarm Light.
• Fully Automated Pre-Trip
• Automated self-test
• DataLink data recorder (uses APX Control Sys-
tem date and time)
• Trip Start to record date/time of trip in DataLink
data recorder memory
• USB communication for downloading data,
upgrading operational software, and Configura-
tion set up
• Automatic Engine Starting
• Functional Parameter locks
• Alarms are stored for future reference
• “ATM style” menu system (which reduces key-
strokes)
• “Dashboard” display screens which display up to
five data points simultaneously
• Backlit “Carrier Blue” silicone keypad makes
operation easy for drivers
2.5.4 Component Description and Location
The APX control system is an automotive style, decentralized, modular system with CAN bus (Controlled Area Net-
work) connectivity. Hardware associated with the system includes:
• Power Module (PM, Figure 2.2)
• Microprocessor Stepper Module (MSM)
• Engine Control Unit (ECU)
• Standby and Control Boxes (Figure 2.4)
• Control Box-Mounted Overload Ground Fault Module (OGF, Figure 2.4)
• Control Box-Mounted Contactor Control Board (CCB1, Figure 2.4)
• Display Module (DM, Figure 2.2)
NOTICE
Under no circumstances should anyone attempt to repair sealed module internal components.
Should a problem develop with these components, contact your nearest Carrier Transicold
dealer for replacement.
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