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UF V (E3) 10/2020 Page 60/119
Temperature too high (over temperature alarm):
• Check whether the outer door was open for a long time or is not closed properly. Close the door if
necessary. In addition, there is door open alarm.
• Check the door gaskets for damage. Replace any damaged gaskets.
• Check whether there is icing around the gaskets. Defrost, if necessary.
• Check whether samples were inserted into the freezer that may release heat.
• Check the ambient conditions. Protect the freezer from direct sunlight. Ensure sufficient ventilation
around the installation location to prevent any buildup of heat in the chamber.
• If these points do not reveal the source of the fault, it may be that the chamber is faulty. Please contact
BINDER Service.
If the same alarm recurs, please contact BINDER Service.
14.4.3 Door open alarm
The open and closed condition of the chamber door is controlled via the door contact switch. The temper-
ature rise, when the door is opened, causes the refrigerating machine to turn on.
When the door is opened the alarm occurs after the defined delay time (chap. 13), factory setting: 1 minute.
• Alarm message “Door open”, “collective alarm” icon
• Audible alarm (buzzer)
• Switching the zero-voltage relay alarm output
Actions:
• Close the outer door.
• Use the OK button to switch off the buzzer even when the door is open.
• The alarm message is cancelled.
• The zero-voltage relay alarm output switches off.
14.4.4 Power failure alarm (chamber with option “battery-buffered alarm system”)
• No alarm message (display is off)
You can turn on the display with the OK button. It turns off automatically after 10 seconds.
• Audible alarm (buzzer): immediately
• Switching the zero-voltage relay alarm output.
WARNING: If customer should use a chamber running in non-supervised continuous opera-
tion, we strongly recommend in case of inclusion of irrecoverable specimen or samples to
split such specimen or samples and store them in at least two chambers, if this is feasible.
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