Instruction Manual

Freeze-dryer Alpha 1-2 LDplus
7 Malfunctions and error correction
Version 11/2006, Rev. 2.0 of 02/12/2014 • sb
55
Translation of the original operating manual
Error message Possible cause Remedy
Ice condenser temperature  20°C
The ice condenser temperature rises to
a non-permissible value during the
freeze-drying process. The pressure
control valve will close automatically in
order to prevent the vacuum pump from
being damaged.
• Insufficient cooling. • Observe the behaviour of the
refrigeration system. If
necessary, inform the service
department (see chapter 7.3 -
"Service contact").
Defective ice condenser temperature
sensor
• The temperature sensor is not
connected or it is defective.
• Inform the service department
(see chapter 7.3 - "Service
contact").
Defective temperature sensor of the
defrosting heater
• The temperature sensor is not
connected or it is defective.
• Inform the service department
(see chapter 7.3 - "Service
contact").
Mains power failure (see chapter 7.1.1
- "Power failure")
• The power supply has been
interrupted.
• The mains power connector is
not connected.
• The fuses have tripped.
• The mains power switch has
been switched off.
• Check the mains fuse.
• Connect the mains power
connector firmly.
• Check the customer-provided
fuses.
• Switch the mains power switch
on.
Default settings loaded
All of the settings have been reset to the
delivery state of the freeze-dryer.
• Error in the parameter memory.
• Manual execution in the service
menu.
• No measure required.
IO communication error (0x20) • Error in the LDplus IO module. • Inform the service department
(see chapter 7.3 - "Service
contact").
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
7.3 Service contact
In the event of queries, malfunctions, or spare part enquiries:
From Germany:
Contact
Martin Christ Gefriertrocknungsanlagen GmbH
An der Unteren Söse 50
37520 Osterode (Germany)
Tel. [phone]
E-mail: [e-mail]
Outside Germany:
Contact our agency in your country. All agencies are listed at
www.martinchrist.de  [Sales Partners]
NOTE
If you would like to utilise our after-sales-service, please state the type of
your freeze-dryer and its serial number.
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