025L02654-000 York EPROM Chip 2 Meg For Water-Cooled Chiller Main Board – HVAC Replacement Part

025L02654-000 is a YORK original EPROM storage chip (EPROM LVD MAIN), produced by Johnson Controls, with a capacity of 2MEG. It is suitable for the main control board of water-cooled chiller units using R22/R134A refrigerants, and is a replacement for reference number BRD-4900. This chip permanently stores the control program and operating parameters of the unit. It serves as the "program carrier" of the microcomputer control center - after power-on, the main control board reads the program and executes all control instructions such as capacity adjustment, safety protection, start-stop logic, etc. If the chip program is lost or damaged, the unit will not be able to start normally or operate with logical errors.