Controls, Indicators, and Displays
SORVALL
®
Centrifuges
3-14
SET Display Advisory Messages
When the RC12BP™ detects a system fault or a situation requiring
operator action, an advisory message appears in the SET display and an
alarm will sound to alert the operator. In most cases, pressing CLEAR
shuts off the alarm and removes the message from the display (if not, in
almost all other cases, turning the main POWER switch OFF and back
ON will do so). The messages can be divided into two types, Problem
Conditions and Terminal Conditions. Possible messages are listed here by
message type, sorted alphabetically, with a description of the condition
and the appropriate action.
Problem Conditions
Problem Condition messages alert the user to a situation that will
not terminate a run in progress (except for ROTOR IMBAL-
ANCE, NO ROTOR, or POWER FAILURE), but may prevent a
run from starting. In many cases, a Problem Condition will force
action to be taken, but can be remedied by the user.
DOOR MUST BE OPENED BETWEEN RUNS
START was pressed, but the chamber door had not been
opened since the previous run ("End" will remain in the RUN
Temperature display until the door has been opened). The
centrifuge will not start. Open the door (if you had not
accessed the chamber since the last run, remove previous
sample and reload the rotor), then close the door and press
START. If the message reappears when START is pressed, it
indicates a door switch failure – remove all sample from the
rotor, unplug the centrifuge and contact Thermo Service.
DOOR OPEN – RUN NOT STARTED
START was pressed, but the centrifuge did not detect that the
chamber door was closed. The centrifuge will not start. Close
the chamber door and press START. If the message then appears
when the door is closed, it indicates a door switch failure. In that
case, remove all sample from the rotor, then unplug the centri-
fuge and contact Thermo Service.
MEMORY FAILURE – CONTACT SERVICE
A memory problem was discovered during the centrifuge
startup routine. All run information that had been saved to
program memory has been lost and overwritten with
SPEED=400 rpm, TIME=00:00, DEG C=40, Options OFF.
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