Carrier CEPL130351-01 Expansion Circuit Board

Carrier CEPL130351-01 expansion circuit board (HK50AA028), also catalogued as CEBD430351-13-RA SST-A, is a modular control accessory used within Carrier HVAC systems to interface with expansion valve (EXV) control networks. In Carrier documentation for rooftop units such as the 48/50Z030-105, the CEPL130351-01 is listed as an Expansion Module and shown with connections to EXV inputs and outputs, indicating its role in valve actuation and signal routing within the control chain. The presence of multiple part-number designations on a single listing signals cross-compatibility across related control assemblies, aiding service technicians in identifying interchangeable parts across catalogs and newer vs. older equipment generations. Because precise connector types and wiring can vary by model, consult the target unit's service literature to confirm pinout and compatibility before installation to ensure proper EXV control and safe, reliable operation.