Error 4.7 is almost always a , not a rotor or imbalance problem. In most cases, thorough cleaning and a simple reset will clear it. However, if the error persists beyond 2–3 attempts, internal component replacement is likely needed. Need model-specific advice? Provide the centrifuge brand and model number (e.g., Eppendorf 5810R, Hettich Universal 320) for a targeted solution.