Process And Equipment Information System; Error Messages - Fisher ALPHA 1-2 LDplus Operating Manual

6.5. Process and Equipment Information System

6.5.1.

Error Messages

52 • Error Correction
Vacuum of 6.11 mbar has not been reached
This error occurs in case the pressure in the ice condenser chamber has
not reached 6.11 mbar after 15 minutes of operation with open pressure
control valve. There must be a vacuum leak in the system. The pump is
switched off to avoid it pumping against the atmospheric pressure.
The pressure control valve is closed and the vacuum pump is switched off.
Please eliminate the error and confirm the message afterwards. Following
the confirmation, the vacuum pump is restarted.
Causes:
•
Micro-aeration valve or drain valve not closed.
•
Lid or drying chamber not mounted correctly.
•
Missing ground-in stopper in the lid or in the drying chamber.
•
Defective vacuum pump. Check whether the mains switch of the
vacuum pump is switched on.
Vacuum sensor defective
This error message is displayed in case the unit control system reads in an
invalid value supplied by the vacuum sensor.
Check the connecting cable and the connections to the vacuum sensor,
perform an atmospheric adjustment of the sensor or replace the vacuum
sensor if necessary.
Causes:
•
Vacuum sensor not connected.
•
Heating spiral of vacuum sensor broken.
Overpressure refrigerator 1
Overpressure in refrigeration unit KM1, released via the pressure switch.
Please check the ambient temperature, ensure sufficient air circulation of
the heat exchanger of the refrigeration system and check the load of the
unit.
Overpressure refrigerator 2
Overpressure in refrigeration unit KM2, released via the pressure switch.
Please check the ambient temperature, ensure sufficient air circulation of
the heat exchanger of the refrigeration system and check the load of the
unit.
Excess temperature "ice condenser"
This error occurs in case the temperature of the ice condenser exceeds
+65°C. All active aggregates are switched off simultaneously, i.e. the
system is automatically switched to standby mode. The error message can
occur when the temperature of the ice condenser exceeds +65°C when
defrosting the system. The refrigerating unit is switched off in order to
prevent it from being operated or started at too high temperatures. The
system cannot be restarted until the ice condenser temperature is lower
Operating Manual Freeze Dryer ALPHA 1-2 LDplus