Beckman Coulter Optima L Series Instructions For Use Manual page 50

Troubleshooting and Maintenance
Diagnostic Messages
Some of the messages provide cautionary information that will not shut down a run in progress.
Others indicate a user error. For example, if you left the chamber door open when you pressed
, the
START DOOR
If the associated display is flashing when a diagnostic message appears, a shut-down malfunction
has occurred. The run will come to a stop.
See Table 4.1
corrective actions. If no user action is indicated, or the error persists, call Beckman Coulter Field
Service for assistance.
Table 4.1 Diagnostic Troubleshooting Chart
Diagnostic
Message
SPEED
TEMP
DRIVE
VAC
IMBAL
DOOR
PWR
CPU
4-6
message would appear to let you know it must be closed.
to determine the nature of the error or problem, possible causes, and recommended
Possible Cause
Speed has been set above the
maximum allowable for the rotor; or
wrong, damaged, or missing
overspeed disk on the installed rotor
Tachometer failure
Temperature control or vacuum
system malfunctioning
Abnormal change in drive speed or
overheated drive
Tachometer failure
Vacuum not being drawn properly
Rotor imbalance (at low speeds)
Door is open when the START key is
pressed
Loss of power during run
Microprocessor malfunction or loss of
program memory
User Action
Check set speed; check the rotor for clean,
undamaged, and correct overspeed disk (see
the Rotors and Tubes manual [LR-IM] for
replacement instructions).
Call Beckman Coulter Field Service and wait
4 hours before attempting to open if display
shows 0 rpm immediately after failure.
Check the air inlet (at bottom of the front panel)
for obstructions. Call Beckman Coulter Field
Service if problem persists.
Be sure a rotor is properly installed on the
spindle; if power has failed, wait for 5 minutes
for drive to cool; check for air inlet obstruction.
Call Beckman Coulter Field Service and wait
4 hours before attempting to open if display
shows 0 rpm immediately after failure.
• Check door O-ring for damage and dirt.
• Check rotor lid O-rings for possible leakage.
• Check the vacuum oil. If milky in color, run
the vacuum system for several hours or
overnight until the oil is clear.
Check for proper rotor loading.
Be sure door is closed.
Check TIME display; run may need to be
restarted or aborted.
No user action. Call Beckman Coulter Field
Service.
PN LL-IM-12AB