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1. Responding to an alarm signal
If an alarm message appears, remove the cause of the trouble as described below and press the CE
button. You will then be able to resume your centrifugation.
If the alarm message persists even after you have done what is specified below, contact service
representative to order a repair.
Alarm
CLOSE DOOR
Close the door completely.
Press the VACUUM or
START button.
CLOSE DOOR
Close the door completely.
Press the VACUUM or
START button.
VACUUM ERROR
Wipe off moisture inside
the rotor chamber, or check
a sample leakage.
SET ROTOR
Set the rotor. Wait up to 20
min.
If the alarm is not cleared.
IMBALANCE
Check balance of samples.
Tighten rotor cover or cap
securely.
INVALID SPEED
Check max. speed of the
rotor.
Set its max. or lower speed
again.
Thermo Scientific
WARNING Unspecified repairs, remodeling or disassembly of the micro-ultracentrifuge
that is not listed below is strictly prohibited by any person other than a Thermo Fisher
Scientific authorized services representative.
Cause
1. The VACUUM or START button has
been pressed with the chamber door left
open.
1. The VACUUM or START button has
been pressed with the chamber door left
open.
1. Required level of vacuum cannot be
reached.
2. After a satisfactorily high level of
vacuum was reached, it lowered (due to,
for instance, sample leakage).
1. The rotor is not installed.
1. Rotor is not properly balanced, and
abnormal vibration has occurred in the
rotor.
2. Rotor cover or cap is not properly
tightened.
1. Rotor speed is set higher than the
maximum allowable speed.
Action
Close the door completely and press the
VACUUM or START button.
Close the door completely and press the
VACUUM or START button.
Wipe off the moisture from inside the rotor
chamber.
Clean the door packing, then apply a thin
coat of vacuum grease. (Refer to
door seal"
on
page
3-3)
Check if the sample is leaking from the
rotor and/or tubes. If so, the tubes may be
overfilled or may be cracked or broken. In
these cases, reduce the amount of sample
in the tubes or change the tubes.
Install the rotor.
Check if the sample tubes exceed
allowable imbalance level.
Check if any one of the tubes is deformed,
and if there is any sign of sample leakage.
Tighten rotor cover or cap securely.
Set the speed within their permitted limits.
Sorvall MTX 150
4
"Chamber
4-3
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