Basic Documentation

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Siemens Universal controllers RMU710B, RMU720B, RMU730B CE1P3150en
Building Technologies Frost protection (basic types A and P) 03.10.2011
17.3 Acknowledgment
The plant can only start again when there is no more frost status message and the
fault has been reset.
The following alternative acknowledgement choices for fault messages are
available:
 Acknowledge and reset on the controller
 Acknowledgement only on the controller (to be recommended only when a frost
protection unit with own interlock is used)
 No acknowledgement
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Frost protection >
Operating line Range Factory setting
Fault
acknowledgement
None, Acknowledge,
Acknowledge and reset
Acknowledge and
reset
Main menu > Commissioning > Settings > .... or
Main menu > Settings > Frost protection unit 1...3 >
Operating line Range Factory setting
Fault
acknowledgement
[1..3]
None,
Acknowledge,
Acknowledge and reset
Acknowledge and
reset
If a frost protection unit own fault interlock is used, the fault message is reset on
the unit. The plant can start again as soon as the fault is reset, independent of
whether or not the fault message was acknowledged on the controller.
Setting values frost
protection
Setting values
Frost protection units 1..3
Note