Martin Christ Beta 2-8 LDplus - Manual (Page 59)

Operating Manual Freeze Dryer BETA 1-8 LDplus / BETA 2-8 LDplus Error Correction 59
Ice condenser temperature -20°C
In the case of insufficient ice condenser cooling, the ice condenser
temperature can increase to -20°C during the drying process. In order to
avoid damage to the vacuum pump caused by the withdrawal of
condensable gases, the pressure control valve will close automatically
when reaching this temperature, and an error message is displayed. Please
observe the function of the refrigeration system and contact the service
department, if necessary.
Temperature sensor “ice condenser” defective
This error occurs in case the temperature sensor is not connected
properly or in case it is defective. Please contact our service
department.
Temperature sensor “defrosting heater” defective
This error occurs in case the temperature sensor is not connected
properly or in case it is defective. Please contact our service
department.
Mains failure
The system detects a mains failure when the power supply is
interrupted under operating conditions (run mode). Once power
supply is re-established, the process will be continued. Process
times will be reset to zero. Set values for control purposes remain
unaffected.
Factory settings loaded
All settings are reset to the delivery status of the unit. The factory
settings are loaded in case the corresponding command is executed
in the service menu or in case of an error in the parameter memory.
IO communication error (0x20)
Error in the IO module LDplus EA
Please contact our service department.