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Symptom
Micro-ultracentrifuge will not
start up when its power is on.
Rotor does not cool, or rotor
temperature is rising.
You press the START button,
but the rotor will not turn.
The backlight level of the
screen is too dark or too
bright.
You can not open the door
because the STOP button
continues to blink.
Thermo Scientific
Possible cause
1. Building power circuit breaker is open.
2. The power cord is unplugged from the
outlet.
1. Rotor was accelerated at low or
intermediate vacuum level.
2. High vacuum level cannot be reached.
1. If the "SET ROTOR" alarm message
appears, the overspeed detector may issue a
signal that prevents the rotor from rotating
even though you pressed the CE button. (This
is not a fault.)
1. The brightness of the screen is not
adjusted.
1. You pressed the START button, and then
you pressed the STOP button before the rotor
started to rotate.
Action
• Close the circuit breaker.
• Plug the cord into the outlet.
• Start accelerating the rotor when the rotor
chamber is at high vacuum level (after the
vacuum indicator is displayed as the following).
In a high vacuum
• Inspect the door seal O-ring (see
door seal"
on
page
3-3).
• Turn off the POWER switch, wait several
minutes, turn on the POWER switch again, and
press the START button.
If this procedure still does not activate this
micro- ultracentrifuge, call a service
representative.
• Make the adjustment while referring to the
clause "Backlight setting" in
"Customizing the
settings"
on
page
2-58.
• Because the detector of this
micro-ultracentrifuge could not identify which
status (status 1 or status 2) occurred, the safety
devices function.
The micro-ultracentrifuge maintains
deceleration status at that time.
Status 1: The rotor stops normally.
Status 2: The speed detector is faulty.
Open the door of the micro-ultracentrifuge after
the safety devices are released (after from 10
seconds to approximately four minutes).
Sorvall MTX 150
4
"Chamber
4-5
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