This manual provides comprehensive technical information for the THERMOGUARD μP-T, a microprocessor control system designed for refrigeration units on trucks. As a leader in transport temperature control, the THERMOGUARD μP-T represents an advancement in digital control for refrigerated transport, offering enhanced precision and diagnostic capabilities. This system is critical for maintaining optimal cargo conditions, and its reliable operation is supported by the detailed procedures and specifications found within this document, which covers software revision 15xx.

The purpose of this service and diagnostics manual is to equip technicians and maintenance personnel with the knowledge required for the diagnosis, troubleshooting, and repair of the THERMOGUARD μP-T system. It delves into system architecture, component identification, electrical schematics, and wiring diagrams, offering advanced diagnostic strategies, fault code interpretation, and component testing procedures. This 333-page English language manual, published in January 2003, is an essential resource for ensuring the efficient and accurate maintenance of these complex refrigeration control systems, supporting optimal performance and minimizing downtime.