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Service Manual Signum 
Error Codes
Error codes are shown on the main display. Err codes are shown continuously; Inf messages are shown for 2 seconds, 
after which the program returns automatically to the weighing mode.
Display  Cause  Solution
Err 101 - 104  Key is stuck  Release key or
  Key pressed at power on  Contact your local Sartorius Service Center
Err 320  Program memory defective  Contact your local Sartorius Service Center
Err 335  Verified weighing platform not compatible  Connect a compatible weighing platform
  with the connected terminal 
Err 340  Operating parameter memory (EEPROM) defective  Turn the scale off and then on again
    If Err 340 is still displayed, contact 
    your local Sartorius Service Center
Err 341  Data lost from RAM;   Leave the scale power on for at least 10 hrs.
    battery needs to be recharged 
Err 343  Data lost from the memory module  Contact your local Sartorius Service Center
  for transaction numbers in external alibi memory 
Inf 01  Data output not compatible with output format  Change the menu settings 
Inf 02  Calibration/adjustment condition  Calibrate only when zero is displayed.
  not met; for example, not tared or  Press ) to tare  
  there is a load on the weighing pan  Unload the scale
Inf 03  Adjustment could not   Allow the scale to warm up again and then
  be completed within a certain time  repeat the adjustment process
Inf 06  Built-in calibration weight defective  Contact your local Sartorius Service Center