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Bard part number 8301-068-002H is an OEM UPC3 Fusion-Tec control board used in Bard Fusion-Tec wall-mount air conditioners to manage core unit functions, safety inputs, and onboard diagnostics so the system can run correctly and be serviced efficiently. This board is software-revision specific, so the trailing letter is important when matching a replacement, and Bard documentation notes that a coordinated software update across connected controllers and units may be required when a PLC style control board is replaced. If your unit is down, confirm the exact part number from the equipment literature or control panel parts list before ordering to ensure proper compatibility and communication with the rest of the system.