Unit Does Not Function; Insufficient Ice Condenser Temperature - Fisher ALPHA 1-2 LDplus Operating Manual

6.3. Unit does not function

6.4. Insufficient Ice Condenser Temperature

Operating Manual Freeze Dryer ALPHA 1-2 LDplus
If the display does not work after operating the mains switch, the
following must be checked:
Is the mains switch plugged in?
•
Check the on site fuses.
•
Check the automatic circuit breaker 1F1 on the back of the
unit.
The refrigerator is equipped with a protection device against
overpressure in the refrigerating system and with a thermal motor
protection.
The protection devices are released
•
with too high ambient temperatures,
•
with insufficient air circulation of the heat exchanger of the
refrigerating system,
•
with overload of the refrigerating system.
The refrigerating system is switched off automatically.
Once the permissible operating conditions are reached again (after a
few minutes), the refrigerator is switched on automatically via the
motor protection switch or via the pressure protection device.
Important errors are shown in the process and equipment information
system.
The minimum ice condenser temperature of approx. -55°C
respectively -85°C is reached if the ice condenser is not loaded and
the ice condenser chamber is evacuated.
Sufficient air circulation is necessary. Do not deposit any objects
behind the freezing unit!
Error Correction • 51