Bosch Climate 5000: reading a code that names an indoor or outdoor origin

What Does Error Prefix and digits Mean?

Bosch Climate 5000 codes are built from a prefix and a pair of digits, and the prefix carries real information: it says whether the indoor unit, the outdoor unit, or the link between them raised the condition. Reading the prefix first narrows a search that would otherwise begin with the digits and end in the wrong table. Applies to: Bosch Climate 5000 ductless mini-split systems documented in the Bosch service and manual library The Climate 5000 name covers single-zone and multi-zone equipment across more than one generation, and code assignments differ between them. Match the prefix and digits against the manual for the indoor and outdoor models on your data plates rather than against a chart for the range as a whole. Owner-safe checks: Photograph the indoor display so that the prefix and the digits are both captured together. | Copy the indoor and outdoor model numbers from their data plates before searching anything. | List any building work, decorating, or trades activity near the pipework or its cable route in recent months. Qualified technician: Interconnecting cable on this equipment carries mains voltage between the units, so inspecting, testing, or reterminating it is qualified work. | Outdoor protections reported through the indoor display involve the refrigerant circuit, which is certified activity rather than an owner check.