Beckman Couler ALLEGRA X-12/R, Service Manual, Page: 49 / 83

Section 3: Service Procedures
3.3.1 Component Resistance Checks
208V
Compressor
Common to Run 5.7 ohm
Common to Start 2.5 ohm
Drive 4.2 ohm
3.3.2 Diagnostic Messages
There are 9 key categories of diagnostics in the Allegra X-12 series centrifuge.
•
System ( S . EPROM, RAM, Software problem)
•
Power ( P . Power failure)
•
Door ( L . Door open, Unlatched, Interlock malfunction)
•
Imbalance (I . Imbalanced rotor)
•
Rotor ( R .Dynamic rotor ID)
•
Drive ( D . Driver board failure, Board overtemp, Over bus voltage,
Communication problem)
•
Speed ( H . Overspeed, Speed not controlling, No Tach present)
•
Temp ( T .Overtemp)
•
Refrigeration ( C. Temperature control)
System Diagnostics
All System diagnostics are only checked during power up, When a System diagnostic occurs, the user
must call the filed service and cannot clear the diagnostic by pressing the [CE] key.
Diag.
# Description Action taken When issued Display
S1 Program in FLASH ROM
changed Shutdown, no brake On power up/ reset S-1 System error,
call Service
S5 Software Exception Shutdown, no brake Any time S-5 System error,
call Service
S7 Battery backed Ram data changed Shutdown, no brake On power up/ reset S-7 System error,
call Service
Power Diagnostics
3-16 Allegra X-12/R, X-15R Service Manual 07/07