Martin Christ Beta 2-8 LDplus - Manual (Page 57)

Operating Manual Freeze Dryer BETA 1-8 LDplus / BETA 2-8 LDplus Error Correction 57
6.3. Unit does not function
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.
6.4. Insufficient Ice Condenser Temperature
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!