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Bard 8301-099-002BX is a factory-programmed UPC3 Core 2 control module supplied boxed, used as the primary controller in certain Bard MEGA-TEC wall-mount air conditioner and heat pump applications. Because this is an OEM programmed board, it is intended to restore proper unit operation, staging, and communications exactly as Bard designed when the original controller has failed or been damaged. When replacing a UPC3 PLC, verify the exact part number and software revision required for your job, and plan on updating software across connected units and controllers when applicable so everything stays compatible.