Esco Cytoculture LS2-4A1, Руководство пользователя, Страница: 16 / 31

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Cytotoxic Lead Shielded Class II Biological Safety Cabinets
2.2.4 Setting the Mode
Cabinet has two working mode, the default normal mode which is used in a day to day activity, and
maintenance mode.
MENU SET MODE
NORMAL
MAINTENANCE
2.2.4.1 Normal Mode
Every time the Cabinet is restarted, this mode will be activated by default. In this mode, all alarms and
interlocks are enabled.
2.2.4.2 Maintenance Mode
Maintenance mode should only be accessed by qualified personnel during maintenance. In this mode, all
alarms are disabled and all interlocks are defeated.
2.3 Alarms and Warnings
BSC uses alarms to indicate that the condition inside the BSC is not safe for the operator, so check the LCD
display to understand the cause of these alarms. The most common alarm is the SASH ALARM that indicates
that the sash is neither at the normal operating height nor at fully closed position (UV mode) – this condition
can easily be corrected by putting the sash at the appropriate operation position.
Another warning that should be acted upon is AIR FAIL! which indicates that there is airflow failure. The
operator should check if there is any obstruction to the airflow, and correct it if possible. However, if the
problem continues, the operator should stop working as the BSC’s protection may have been compromised.
Call service or Esco’s local distributor.
Other alarms that indicate a failure or an error in the BSC system:

AIRFAIL:NO! will be displayed if the blower is turned off while there is an airflow failure.

SASH:ERROR POSITION will be displayed if the microprocessor (controller) detects more than one
micro-switch activated at the same time, which is impossible, as the sash can only be at one position
at one time. This indicates a failure in the sash detection system.

SENSOR UNCALIBRATED will be displayed if the airflow velocity sensor is not yet calibrated.