Thermo King TriPac Evolution APU Error Codes

You need free software and a windows laptop to read these codes. You may be able to find it on the web. You're looking for a file titled EVOLUTION Service Tool R2.exe. You can download it from this website (Windows 10 is required).

Connect USB cable from the APU motherboard to USB in your laptop and run the software.

Code 10. High Discharge Pressure.

Code 17. Engine failed to crank.

Code 18. High Engine Coolant Temperature

Code 19. Low Engine Oil Pressure.

Code 25. Alternator Check.

Code 31. Check oil pressure switch

Code 35. Check Run Relay.

Code 49. Restricted air flow.

Code 93. Check Low Pressure Cutout.

Code 155. Lost CAN communication  

Code 249. Engine coolant sensor (WT1)

Code 254. Check Inlet Water Temperature Sensor (WT2)

- Video on how to connect computer

- Manual on the software.