What is the function of the uP-T Service Test Mode?

The uP-T Service Test Mode is designed to facilitate various diagnostic operations for the unit. By enabling the unit to perform multiple functions critical for troubleshooting and system checks, the uP-T Service Test Mode serves as a valuable tool for technicians.

It allows for the forced operation of the unit, which helps in conducting thorough electrical diagnostics. This is crucial when trying to isolate issues related to the electrical components of the refrigeration unit. Furthermore, it energizes all electrical components without requiring the engine to run. This ability is essential, as it permits testing of the system under conditions that mimic operational functionality without relying on the vehicle's engine.

Additionally, the mode enables the unit to run in a selected operating mode specifically for system diagnostics, allowing technicians to observe the unit's behavior under different operational scenarios. This comprehensive approach to diagnostics is why the correct answer encompasses all these features, highlighting the versatility and importance of the uP-T Service Test Mode in troubleshooting and maintenance practices for Thermo King units.