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Operation
~~~~~~~~
Centrifuges
3-8.
Troubleshooting
Refer
to
Table
3-2
for
possible
causes
and
corrective
actions
to
problems
that
occur
either
befo~e
or
during
a run.
Table
3-2.
Troubleshooting
Problem
Possible
Cause(s)
Suggested
Corrective
Action
Centrifuge
will
not
start
Run
terminated
BRUSHES
light
is on
~~~~~
light
is on
Door
will
not
open
The
actual
chamber
temperature
indicated
by
the
black
needle
is
3~~greater
than
the
overtemperature
set
by
the
red
temperature
needle.
Chamber
door
is open.
Main
power
is set
OFF.
Power
failure
or
interruption
oc¬
curred.
Chamber
overtemperature
occurred
during
the
run.
Rotor
imbalance
occurred.
~~~~~~~~~
condition
caused
by
lack
of
rotor.
Brushes
are
worn.
Rotor
imbalance
occurred.
Power
failure
occurred.
Set
the
red
needle
above
the
black
needle
or
let
the
chamber
cool
before
pressing
START.
Close
the
chamber
door.
Set
the
POWER
switch
ON.
Restart
the
run
when
power
is
restored.
~~~~~~~
the
rotor
and
chamber
before
start~ng
run.
Refrigeration
system
failure.
Contact
Service
Engineer.
Balance
rotor
and
restart
the
run.
Instal~
rotor
and
restart
run.
Replace
brushes
before
starting
a
new
run.
Balance
rotor
and
restart
the
run
Open
chamber
door
manually
(see
Emergency
Sample
Recovery
in
Section
11).
3~8
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