Refrigerated Centrifuge Sigma 3-30KS
7 Malfunctions and error correction
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Version 07/2012, Rev. 1.22 of 02/06/2021
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Translation of the original operating manual, part no. 0701302
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7
Malfunctions and error correction
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7.1
General malfunctions
Malfunctions are indicated by a dialog box. If the acoustic signal is
activated, it sounds when the error message is displayed.
• Eliminate the source of the problem (see table below).
• Acknowledge the error messages by pressing the lid key.
NOTE
Error messages can be eliminated by pressing the lid key. The error itself
will not be eliminated, but the centrifuge can be operated again.
Type of error
Possible reason
Correction
No indication on the display
No power in the mains supply
Check fuse in the mains supply
Power cord is not plugged in
Plug in power cord correctly
Fuses have tripped
Reactivate temperature fuse (see
chapter 5.2.1 - "Type of connection")
Mains power switch off
Switch mains power switch on
Centrifuge cannot be started:
start key LED is not illuminated
Several possible causes
Power off/on. If the error occurs
again, contact service
Centrifuge cannot be started:
lid key LED flashes
The lid lock is not closed correctly
Open and close the lid. If the error
occurs again, contact service
Centrifuge decelerates during
operation
Brief mains power failure
Press start key in order to restart the
centrifuge
System error
Power off/on. If the error occurs
again, contact service
Centrifuge decelerates during
operation, imbalance dialog box is
displayed
– Improper loading
– Centrifuge is inclined
– Drive problem
– Centrifuge was moved during run
Balance load and restart the
centrifuge. If the error occurs again,
contact service
– Ungreased load- bearing bolts
Clean and grease load- bearing bolts
Lid cannot be opened
Lid lock has not released
Unlock the lid manually (see chapter
7.1.1 - "Emergency lid release") and
contact service
Lid seal sticks
Clean the lid seal and apply talcum
powder
Temperature value cannot be reached
(only for refrigerated centrifuges)
Condenser dirty (only air-cooled units) Clean the condenser. If the error
occurs again, contact service
Hard running noise during the
centrifugation
Screws of the transport safety device
are not removed
Remove screws of the transport
safety device (see chapter 4.5 -
"Transport safety device")
