62/238
Building Technologies
Modular Heating Controller RMH760B
CE1P3133en
HVAC Products
5 General functions, fundamentals
05.02.2007
5.8.2
Overload message and supervision of flow
As with every digital input, the normal position can also be parameterized for the pump
fault inputs and the flow input (
… > Settings > Inputs > RM…
(controller or module type)
>
Normal position
).
If a twin pump is installed, changeover to the other pump takes place in the event of
fault. In any case, a fault status message will be delivered.
For acknowledgement, following applies:
•
A fault due to a missing fault status message must be acknowledged and reset
•
If there is a pump fault, the respective function block will be stopped
For faults due to overload, the acknowledgement and reset behavior can be parameter-
ized.
In the case of twin pumps, the fault behavior of the respective function block becomes
active only should
both
pumps fail.
Flow supervision only becomes active 60 seconds after the pump is switched on.
Number Text
Description
2526
[Heat circuit 1 pump] over-
load
Heating circuit pump of heating circuit 1
overloaded
2527
[Heat circuit 1 pump B]
overload
Heating circuit pump B of heating circuit 1
overloaded
2528
[Heat circuit 1 pump] no flow
Heating circuit pump of heating circuit 1 with
faulty flow
2529
[Heat circuit 1 pump B] no
flow
Heating circuit pump B of heating circuit 1
with faulty flow
2530
[Heat circuit 1 pump] fault
Heating circuit pump(s) of heating circuit 1
faulty; partial plant stop
For the complete list of fault status messages, refer to section 15.1 "List of fault num-
bers".
Fault status messages
using the example of a
heating circuit twin pump
