Overload Message And Supervision Of Flow - Siemens Synco 700 Series Basic Documentation

Pump kick
Fault status messages,
using the example of the
boiler twin pump
72/232
Building Technologies
HVAC Products
The pump kick acts as follows, depending on the priority of changeover:
Operating state of the
pumps
With automatic changeover
Both pumps do not
Kick first acts on the pump that
run (summer opera-
was in operation last
tion)
1 of the 2 pumps runs Not applicable
Delayed changeover also acts with the pump kick.
5.8.4

Overload message and supervision of flow

With the pump fault inputs and flow input – as with every digital input – the normal
position can be parameterized (... > Settings > Inputs > Terminal ... > Normal position).
If a twin pump is used and one of the pumps becomes faulty, changeover to the other
pump takes place.
In any case, a fault status message is delivered.
For acknowledgements, following applies:
• A fault due to a missing fault status message must be acknowledged and reset
• With faults resulting from overload, the acknowledgement and reset behavior can be
parameterized
If a pump becomes faulty, the relevant function block is stopped.
With twin pumps, the fault behavior of the respective function block is activated only if
both pumps fail.
Flow supervision only becomes active 60 seconds after the pump is switched on.
Number Text
2401 [K1 pump] overload
2421 [K1 pump B] overload Boiler pump B, boiler 1, fault overload
2411 [K1 pump] no flow
2431 [K1 pump B] no flow
2441 [Boiler 1 pump] fault
For the complete list of fault status messages, refer to chapter 15 "Fault tracing sup-
port".
Boiler Sequence Controller RMK770
5 General functions, fundamentals
Impact of pump kick
With fixed assignment
Kick first acts on the re-
serve pump and then on
the working pump
Kick only acts on the
reserve pump
Description
Boiler pump, boiler 1, fault overload
Boiler pump, boiler 1, flow fault
Boiler pump B, boiler 1, flow fault
Boiler pump, boiler 1, fault
CE1P3132en
23.04.2009