Instruction manual

Troubleshooting
4-2 WX Ultra Series Thermo Scientific
1. Searching for Alarm Information
2. Responding to an alarm signal
If an alarm message appears, remove the cause of the problem as described below and press CE key. You
will then be able to resume your centrifugation.
If the alarm message persists even after you have done what is specified below, contact a Thermo service
representative.
No. Key operation Screen display and considerations
1
A “DOOR” alarm signal occurs.
2
Press MENU key.
3
Select “ALARM INFORMA-
TION”.
>> The screen related to the current alarm signal is displayed before any other
screen.
>> To get back to the Run Screen, press ESC key twice.
Alarm Cause Action
DOOR 1. The VACUUM or START key has
been pressed with the chamber door
left open.
• Shut the door completely and press VACUUM or
START key.
VACUUM 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).
• Wipe off the moisture from inside the rotor chamber.
• Clean the door seal o-ring, then apply a thin coat of
vacuum grease. (Refer to Section 3-1.)
• Check if the sample is leaking from the rotor and/or
tubes.
• If no operation sound is produced from the vacuum
pump, check the breaker of the pump.
• An alarm message appears in
the message field of the Run
screen.
• The display switches to the
Menu screen.
•The “ALARM
INFORMATION” screen
appears.