4-3
Troubleshooting
Table 4-1. Diagnostic Message Chart (continued)
Continued —
Diagnostic
Message
Problem
Result
Recommended Action
IMBAL
(imbalance)
Rotor load is imbalanced
Run shuts down with
maximum brake
• Make sure that the tubes are
loaded symmetrically in the
rotor.
• With swinging bucket rotors,
lubricate the buckets
according to the rotor manual
instructions. Unlubricated
pivot pins can prevent the
buckets from reaching
horizontal position, which
can cause imbalance.
ROTOR
System-identified rotor does not
match user-selected rotor; set
speed
below
rotor maximum
Run continues
Press
_'0)%6a
to stop LED from
flashing.
System-identified rotor does not
match user-set rotor; set speed
above
rotor maximum
System lowers run speed
to the maximum of the
rotor identified by system
Press
_'0)%6a
to stop LED from
flashing.
System cannot identify rotor
(rotor ID system malfunction)
Run shuts down with
maximum brake
Check rotor and restart run.
No rotor in chamber
Run starts; within seconds
the system determines
that no rotor is installed
and the run shuts down
with maximum brake
Install rotor and restart run.
SPEED
Speed control system is
malfunctioning
Rotor spinning above set
speed; run shuts down
with maximum brake.
Call Beckman Coulter Field
Service.
DOOR
Door is not latched properly or
interlock is out of position
DOOR LED lights after
_78%68a
is pressed and
system shuts down.
Open the door and close it
firmly; press
_'0)%6a
to stop LED
from flashing. Restart the run.
Door stays locked after rotor
stops spinning
Sample cannot be
retrieved
Restart the centrifuge and
perform a brief run. If door will
still not open after deceleration,
call Beckman Coulter Field
Service.
Door latches do not close and
lock
Run cannot start
Check the latch hole (at left of
door) for debris. Gently clean
the area with a lintless cloth or
tissue. Be careful not to damage
sensitive electronics in the area.