22 | Troubleshooting
Centrifuge GT 4 / 4R
E-25-E-27
The centrifuge cannot be
operated.
The run does not start or the
centrifuge runs down without
being braked.
Time has expired for the lid lock drive while opening the lid.
Restart the centrifuge.
If an error message appears again, contact Unity Lab Services.
E-28
The centrifuge cannot be
operated.
The run does not start or the
centrifuge runs down without
being braked.
Error during the self-test of the centrifuge program and the
electronics.
Restart the centrifuge.
If an error message appears again, contact Unity Lab Services.
E-29
The centrifuge cannot be
operated.
The run does not start.
Check whether you selected the right bucket.
Is it easy to turn the rotor when the lid is open?
Does the rotor rub against the device?
Restart the centrifuge.
If an error message appears again, contact Unity Lab Services.
E-30
The centrifuge cannot be
operated.
The run does not start or the
centrifuge runs down without
being braked.
Restart the centrifuge.
If an error message appears again, contact Unity Lab Services.
E-33
The centrifuge cannot be
operated.
The run does not start or the
centrifuge runs down without
being braked.
Overpressure in the refrigeration unit.
Clean the air inlet for the condenser.
Restart the centrifuge.
If an error message appears again, contact Unity Lab Services.
E-34-E-36
The centrifuge cannot be
operated.
The run does not start or the
centrifuge runs down without
being braked.
Error during the self-test of the centrifuge program and the
electronics.
Restart the centrifuge.
If an error message appears again, contact Unity Lab Services.
E-40
The centrifuge cannot be
operated.
The run does not start or the
centrifuge runs down without
being braked.
The centrifuge accelerates too slowly.
Check whether you selected the right bucket.
Is it easy to turn the rotor when the lid is open?
Does the rotor rub against the device?
Restart the centrifuge.
If an error message appears again, contact Unity Lab Services.
E-41-E-74
The centrifuge cannot be
operated.
The run does not start or the
centrifuge runs down without
being braked.
Error during the self-test of the centrifuge program and the
electronics.
Restart the centrifuge.
If an error message appears again, contact Unity Lab Services.
Failure
message
Problem with centrifuge
Possible causes and cures
