
4-3
Troubleshooting
OTHER POSSIBLE PROBLEMS
Possible malfunctions that may not be indicated by diagnostic
messages are described in Table 4-2, along with probable causes,
listed in the probable order of occurrence, and corrective actions.
Perform the recommended corrective action in sequence, as listed.
If you are unable to correct the problem, call Beckman Coulter
Field Service.
Table 3-2. Troubleshooting Chart
Problem
Problem/Result
Recommended Action
Imbalance LED
lights and rotor
decelerates to
stop
Rotor is out of balance
Check to be sure the rotor is in good condition and is
loaded symmetrically around the center of rotation,
with containers of equal weight and density opposite each
other.
Rotor tie-down screw is not
properly fastened
Make sure rotor lid is properly aligned and tie-down screw
is securely fastened.
Centrifuge is misaligned (tilted)
Level the centrifuge on the bench or table.
Centrifuge was moved during
operation
After the rotor comes to a complete stop, open and close
the centrifuge door, then restart.
Drive error (mechanical damage)
Call Beckman Coulter Field Service.
Rotor cannot
achieve set
speed
Line voltage below rating
Have a qualified service person measure line voltage
while the instrument is operating.
Electrical failure
Make sure the power cord is securely connected; call
Beckman Coulter Field Service.
Motor failure
Call Beckman Coulter Field Service.
Door will not
open
Rotor spinning
Wait until the rotor stops.
Power not on
Plug in the power cord; turn power on.
Source power failure
See
RETRIEVING YOUR SAMPLE
, below.
Latch stuck
See
RETRIEVING YOUR SAMPLE
, below.
Displays are
blank
Power not on
Plug in the power cord; turn power on.
Electrical failure
Make sure the power cord is securely connected; call
Beckman Coulter Field Service.
Chamber does
not reach
selected
temperature
Centrifuge cannot maintain
selected temperature for rotor
in use at speed selected
Refer to applicable rotor manual for temperature and
speed requirements. Also, precool rotors before running
at low temperatures. Precool rotor chamber by running
a 30-minute cycle at the required temperature with the
speed set at 2000 rpm.