Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 5 General functions, fundamentals 2017-09-29
5.1.3 Fault handling
Number Text Effect
5102
>1 time switch in heating
circuit 1
Nonurgent message; must be
acknowledged
5112
>1 time switch in heating
circuit 2
Nonurgent message; must be
acknowledged
5122
>1 time switch in heating
circuit 3
Nonurgent message; must be
acknowledged
5302 >1 DHW time switch Nonurgent message; must be
acknowledged
For each geographical zone, only one time switch master may be set. If several
controllers are parameterized as masters, a fault status message will be delivered. The
fault is identified by the time switch master(A) when it receives a time switch signal from
some other master(B) in its own zone. Time switch master "A" will then display and
forward a fault, but no more time switch signal, in order to prevent switching back and
forth of the slaves.
Number
Text
Effect
5101
System time switch failure 1
Nonurgent message; must not be
acknowledged
5111
System time switch failure 2
Nonurgent message; must not be
acknowledged
5121
System time switch failure 3
Nonurgent message; must not be
acknowledged
5301
DHW system time switch
failure
Nonurgent message; must not be
acknowledged
The controller always expects a time switch signal from the bus. If not transmitted, the
controller will operate in "Comfort" mode. In that case, fault status message System time
switch failure 1 (or 2 or 3) will be delivered.
5.2 Holidays and special days
Each heating circuit and DHW heating use their own holidays / special day program.
Weekdays deviating from the normal 7-day program can be entered by the plant
operator as holidays or special days, using the "Holidays / special days" menu. Entry is
described in Operating Instructions B3133.
The operating mode for the holiday period can be separately selected for each
individual heating circuit and for DHW heating.
Function "Holidays / special days" is active only if room operating mode "Auto" has
been selected. The same applies to DHW heating. Here too, DHW operating mode
"Auto" must be selected.
5.2.1 Communication
If the controller is connected to other controllers via bus, the holidays or special day
program can be made available to other controllers (master), or it can be adopted from
some other controller (slave).
>1 time switch signal in
the heating circuit
Failure of system time
switch
Note