Eppendorf: Centrifuge 5424 R Service Manual

Potential motor failure or imbalance detection; verify rotor seating. Error 21 (Refrigeration):

The manual outlines a rigorous maintenance schedule to ensure both mechanical integrity and user safety: Eppendorf Centrifuge 5424 R Service Manual

Before opening the Eppendorf 5424 R, the service manual emphasizes several legal and safety points: Potential motor failure or imbalance detection; verify rotor

Speed sensor failure or drive overheating. A common "fix" reported by technicians involves cleaning the internal magnetic lid sensors. Potential motor failure or imbalance detection