Carrier Transicold Trailer Units with APX Controllers

Locate the unit’s HMI and access to its rear part.

Unplug the unit original harness from the HMI.

Connect the female HRN-RCCCAAPX connector to the HMI.

Route the circular connector branch on the HRN-RCCCAAPX harness toward the IOX-COLD RUGGED , considering the IOX-COLD RUGGED's location. If necessary, use a cable guide to route it through the original unit harness.

Once routed, connect the harness’ circular connector branch to the IOX-COLD RUGGED.

Route the gray 3-wire connector branch of the HRN-RCCCAAPX harness toward the GO RUGGED device , taking into account its placement. If required, use a cable guide to feed it through the original unit harness.

Once routed, connect the gray 3-wire connector branch to the GO RUGGED.

Plug the male 14-pin connector of the HRN-RCCCAAPX into the refrigeration unit's harness. Please note that the connector may vary slightly in appearance based on your specific harness version, as shown in the images below.

Once the HRN-RCCCAAPX routing and all connections between the IOX-COLD RUGGED and the GO9 RUGGED are completed, follow steps 4 and onward in the IOX-COLD RUGGED Quick Start Guide .

Do not forget to fasten all the installed cables to the refrigeration unit harnesses and stationary mechanical parts of the asset to secure the cable management.

! IMPORTANT: The GO9 RUGGED must be powered by the three loose wires located on harness HRN-RCCTKSR2. For more details, refer to the quick start guide linked above.

! IMPORTANT: It is mandatory for every installation to use the MyInstall tool (requires a provisioned MyAdmin account) to configure the installation. If you do not do this, the device may not transmit the correct data.

You need a secure MyAdmin login to use this tool. If you do not have one, refer to the Creating MyInstall Credentials section of the MyInstall user guide.

In certain cases, customers may have trailer refrigeration units fitted onto rigid trucks. The main HMI or remote panel is typically installed inside the cabin.

Pre-installation: Modify the HRN-CCCAAPX harness by cutting it close to the connectors to create a single harness from the IOX-COLD Molex connector to the APX controller.

Modify the HRN-CCCAAPX harness by cutting it close to the connectors to create a single harness from the IOX-COLD Molex connector to the APX controller.

Unmount it from its location to access its wiring.

For most non-standard installation scenarios, the panel is connected to four or more wires. In this step, you’ll need to identify 3 wires: ground, CAN high, and CAN low using a Digital Multi Meter and the igntion must be ON.

Test each wire one by one to identify the relevant wires:

The ground wire will have a very low resistance with the vehicle chassis (near 0 ohms) in ohmmeter mode, or will beep in beep mode.

Once you’ve identified the ground, measure the difference between it and the other wires using your multimeter in DC voltage mode.

The correct CAN high wire will have a voltage measurement slightly above 2.5V , typically around 2.6 or 2.7.

Repeat step 2a. to find the CAN low wire , which will have a voltage measurement slightly below 2.5V , typically around 2.3 or 2.4.

We recommend using a multimeter with insulation piercing clips to test the wires without damaging them.

Connect the HRN-CCCAAPX to the IOX-COLD port C.

Route the HRN-CCCAAPX to the in cabin controller location.

✱ NOTE : If the in-cab controller is located near the rear view mirror, route the HRN-CCCAAPX through the vehicle’s cabin columns (right or left, depending on where the IOX-COLD and GO devices will be installed and connected). This ensures the cables won’t interfere with normal vehicle operation.

The HRN-CCCAAPX has additional wires which allows for connecting the IOX-COLD to additional sensors, such as 1-wire temperature sensors or door sensors.

If the customer requests these additional sensor connections, see Cold Chain installation - accessories . If not, go to the next step.

Once the HRN-CCCAAPX routing and connections are completed and all required connections are made, connect it to the GO device as described in the IOX-COLD quick start guide .

Once the installation is validated, put all mechanical items back in their original places and fix the in-cab controller to its bracket.