1.
2.
3.
6.5 Battery replacement
Only UA 400 AC
The case controller has a buffer battery of the type CR 2450 N, 3 V Lithium. In order to change the battery, it is
necessary to remove the case controller from the system. In this case, the refrigeration point is not regulated
and monitored!
Performing the battery replacement
Disconnect case controller and refrigeration point from the power supply. Acknowledge alarm in the higher
level controller if necessary.
Disconnect all plug connectors, remove the device from the DIN rail.
(A)Pushtheplasticlid’stwoleft-handsnaplugsonthesideupwardswithabroadflatbladescrewdriver
and
(B) lift up the lid with a swivelling movement.
•
•
•
DANGER
Warning about dangerous electrical voltage! Danger of electric shock!Thesafetyregulations
and work safety instructions in chapter Conventions must be observed for the battery replacement.
Abatteryreplacementmayonlybeperformedbytrainedpersonneloratthefactorybythe
manufacturer!
Allplugconnectorsmayonlybeinsertedandremovedwhenthepower supply is disconnected.
Label connector if necessary before the removal and then detach.
Circuit boards may only be replaced when the power supply is disconnected. Always hold circuit
boards at the edge.
ObserveESD(ElectrostaticDischarge)regulations(seemanualESD - Rules for handling
and working)!
Risk of false alarm! The removal of the controller from the CAN bus generates an error message in
the higher level controller (System Centre). Therefore, in addition to the precautionary measures that
directly affect the control, consequences on the higher level controllers connected to the CAN bus
must also be considered.ItmustbeensuredthatActivating service mode is activated on the higher
level controller and that the service centre has previously been informed accordingly.
Warning about dangerous electrical voltage! Danger of electric shock!Avoltageof230VAC
can be present on some connectors.
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