Error E-29

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Error E-29 indicates that upon centrifuge startup, the rotor did not spin or was not identified. To resolve this issue: 1. Ensure there are no obstructions in the chamber and clean the bowl and rotor. 2. Measure motor resistance (2.2 ohms between all phases) and check if the motor shaft spins freely. Replace motor if needed. 3. Verify the rotor ID sensor and ribbon cable integrity. 4. If the error persists, check the Main PCB. 5. Restart the centrifuge.

Issue

Error E-29 signifying that, upon centrifuge start up, the rotor did not spin or was not identified

Environment

Sorvall Legend XTR

Sorvall Legend XT

Sorvall Legend XFR

Sorvall Legend XF

Thermo Scientific SL40R

Thermo Scientific SL40

Sorvall ST40R

Sorvall ST40

Sorvall ST-40R

Sorvall ST-16R

Sorvall ST16

Sorvall ST16R

Sorvall Legend X1R

Sorvall Legend X1

Thermo Scientific SL16R

Thermo Scientific SL16

Thermo Scientific Megafuge 16R

Thermo Scientific Megafuge 16

Thermo Scientific Multifuge X1R

Thermo Scientific Multifuge X1

Thermo Scientific Multifuge X3

Thermo Scientific Multifuge X3R

Thermo Scientific Multifuge X3FR

Thermo Scientific Multifuge X3F

Resolution

Check to make sure that there are no obstructions in the chamber preventing the rotor from spinning free. Also thoroughly clean the entire bowl and rotor. Once verified and clean, measure the resistance of the motor windings for 2.2 ohms between all 3 phases and verify that motor shaft spins free by hand as well. Should the motor need to be replaced, it is P/N 20210429. Keep in mind that a motor grounding kit needs to be installed if it wasn’t previously installed. Contact Technical Support for any assistance or part numbers needed.

Another reason would be rotor identification by the sensor. If we know that the rotor spins upon starting the unit, verify integrity and termination of the ribbon cable from the rotor ID sensor to the main board. The rotor ID sensor is P/N 20150270. Special tool kit P/N 70904693 is needed to remove the auto-lock spindle on the shaft of the motor to access the sensor. If the error persists, the least likely possibility the issue may be with the Main PCB. If no bio-med technician is available to troublehsoot, Field Service Engineer dispatch is recommended.