Without a more specific name, here are some general areas and tools you might be interested in:
If you need to generate this report for a specific client or job:
Before you use the software after your download, remember: carrier tru tech download
Tru Tech communicates via:
The Carrier TrueTech download capability is the "Black Box" of the transport refrigeration unit. Regular downloading of data is recommended after every trip to ensure: Without a more specific name, here are some
Even after a successful Carrier Tru Tech download, you may face problems. Here is your troubleshooting cheat sheet:
| Problem | Likely Cause | Solution |
| :--- | :--- | :--- |
| "No License Found" | Dongle not inserted or driver failed. | Unplug and replug dongle. Reinstall dongle driver from the Drivers folder. |
| Connects but no data (stars go up/down) | Incorrect Baud rate or parity. | Change COM port settings in Windows Device Manager to match the chiller (often 19200 baud for newer units). |
| Blue Screen of Death (BSOD) | Old RS-232 adapter driver conflict. | Buy a high-quality FTDI chip-based USB-to-Serial adapter (e.g., Tripp Lite or OMNI). Avoid $5 adapters. |
| "Runtime Error 13" | Mismatched Windows regional settings (decimal vs comma). | Go to Control Panel > Region > Additional Settings > Set Decimal symbol to "." (period). |
| Software crashes on launch | Windows Defender blocked a .dll file. | Reinstall software while Defender is off. Add C:\Carrier folder as an exclusion in Windows Security. | Before you use the software after your download, remember:
A: Tru Tech is in maintenance mode. Carrier has moved to "Carrier Service Technician (CST)" for new equipment, but Tru Tech is still required for chillers built before 2020. You can still download it if you have an existing license.
✅ Tru Tech installed and launches without errors.
✅ USB-to-CCN adapter drivers loaded.
✅ Able to go “Online” with at least one CCN controller.
✅ Backup of original configuration saved (before making changes).
Need further help? Contact Carrier’s Commercial Technical Support at 1-800-379-7945 (option 2 for software issues).
Last updated: March 2025
