Eppendorf LN2 Backup System - Manual (Page 26)

Maintenance
New Brunswick LN2 Back-up System
English (EN)
26
8.3 Electrical connection maintenance
All electrical cables should be checked every month. Failure to do so may result in failure of the device. If
damage is found, do
not attempt to repair by yourself.
1. Turn off LN
2
Back-up System and unplug the power cord from the mains.
2. Inspect the power cord, door switch cable, solenoid cable, and temperature sensor cable for cuts or
other damage.
3. If damage is found, contact a qualifed service engineer to replace the damaged parts.
8.4 Battery maintenance
The LN
2
Back-up System runs on a rechargeable battery during a power failure.
Contact a qualified service engineer to replace the battery every 5 years or when the Low Battery Alarm
sounds despite it being plugged into the mains.
8.5 Transfer line and manifold maintenance
At least once annually, a qualified service engineer should inspect the LN
2
transfer line from the Dewar to
the injector for damage or deterioration.
WARNING! Battery
 Do not attempt to replace or repair battery by yourself.
 The control unit contains mains voltage.