Buy Thermo King Smart Reefer 3 HMI Controller Online
45-2726 / Genuine Thermo King / Smart Reefer SR3 HMI Controller
Thermo King Smart Reefer 3 HMI Controller for 45-2726 and 845 2726
Thermo King SR3/SR2 HMI Controller | 45-2726 845-2372

45-2726 / Genuine Thermo King / Smart Reefer SR3 HMI Controller
The Thermo King 45-2726 / 845-2372 Original HMI Controller is specifically designed for Smart Reefer SR3 and SR2 systems. This high-quality Human-Machine Interface device allows user interaction with the refrigeration unit, displaying critical operating information. It offers easy installation and reliable performance.
845-2372 Smart Reefer SR3 SR2 HMI Controller 45-2726
845-2372 Smart Reefer SR3 SR2 HMI Controller 45-2726
New: A brand-new, unused, unopened, undamaged item in its original packaging (where packaging is applicable). Packaging should be the same as what is found in a retail store, unless the item was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. See the seller’s listing for full details.

Thermo king OEM TK Thermo king Reefer Unit HMI Display Controller SR3 SR2
SR-3 Smart Reefer 3 control systems for Thermo King® trailer units.
Fully compatible with SR-2 (Smart Reefer 2) systems as a direct replacement.
45-2726 845-2372 ORIGINAL HMI CONTROLLER FOR Thermo King Smart Reefer SR3 SR2
Equivalent to OEM part numbers:
45-2372 / 845-2372
Technical Details
Thermo king OEM TK Thermo King Reefer Unit HMI Display Controller SR3 SR2 845-2372
its new in box smart reefer 3 controller for Thermo King.
Worldwide shipping, Arrives 4 – 10 days by Fedex
CONTROLLER HMI-3 / SMART REEFER 3 and Smart Reefer 2
SR2 superseded to SR3
SR2 PART NO: 41-4942
TRP-845-2372
Fits:TK® SLX 100 / 200 / 300 / 400 / SPECTRUMTK® SLXe 100 / 200 / 300 / 400 / SPECTRUMTK® SL400e SR2 Tier 2 Engin
SMART REEFER 3 (SR-3)
Controller Overview
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-3 Controller, but you will find that a few minutes studying the contents of this manual will be time well spent.
WARNING: Do not operate the unit until you are completely familiar with the location and function of each control.
Switching “ON” the unit
1. On/Off Master Isolator Switch must be ON.
2. Press the I/ON Microprocessor key for 1 second.
3. Unit is switched “on”.
Microprocessor ON/OFF switch
Microprocessor On/Off Switch is located above engine inside the unit. The switch is normally left in On position.
Operating Instructions
HMI Control Panel
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 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.
Control Panel Display
The display is used to supply unit information to the operator. This information includes setpoint, current box temperature operating information, unit gauge readings, system temperatures and other information as selected by the operator. The default display is called the Standard Display. It is shown in Figure 4 and will be described in detail later in this chapter.
Control Panel Keys
The four keys on the left and right sides of the display screen are “dedicated keys” (see Figure 4). Their functions are listed below.
On Key: This key is used to turn the unit on. First the display will briefly show the Thermo King Logo and then the statement “Configuring System – Please Wait”. When the power-up sequence is complete the display shows the Standard Display of box temperature and setpoint.
Off Key: This key is used to turn the unit off. First the display will briefly show “System is Powering Down – Please Wait. Press On to Resume” and then “Off” will appear momentarily. When the power-down sequence is complete the display will be blank.
Defrost Key: Press this key to initiate a Manual
Defrost cycle.
CYCLE SENTRY/Continuous Mode Key: Press this key to switch back and forth between the CYCLE-SENTRY mode and the Continuous Run mode. If OptiSet Plus is in use, it may not be possible to change the Mode.
The four “soft” keys under the display are multi-purpose keys. Their function changes depending on the operation being performed. If a soft key is active the key function is shown in the display directly above the key. The keys are numbered from left to right, with Key 1 on the far left and Key 4 on the far right.
Typical soft key applications:
•Setpoint
•Gauges
•Sensors
•Menu
•Next/Back
•Yes/No
•+/–
•Select/Exit
•Clear/Help
•Hourmeters
Turning Unit On
Complete the following steps to turn on the unit:
1. Press the ON key
2. The display briefly shows a Thermo King Logo
IMPORTANT: The ON key must be held down until the Thermo King Logo appears. If the ON key is not held down long enough (approximately ½ second), the display may flicker but the unit will not start up. If this occurs, hold the ON key down until the Thermo King logo appears.
NOTE: With extremely cold ambient temperatures it may take up to 15 seconds for the first display to appear.
3. The “Configuring System” Screen briefly appears while communications are established and the unit prepares for operation.
NOTE: If more than one language has been enabled, a prompt will appear at this point to allow the desired language to be chosen. If this occurs, go to “More Than One Language Enabled” on page 11 to continue the unit start up procedure. If this does not occur, only one language is enabled and you can continue with the unit start up Step 4 below.
4. The Standard Display showing box temperature and setpoint briefly appears. See “Figure 6: Turning Unit On Screen Sequence, One Language Enabled,”
5. The “Diesel Engine Starting” Screen briefly appears as the engine preheats and starts.














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