Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 9 Heating circuit control 2017-09-29
9.11 Fault handling
As soon as commissioning is completed (by quitting the Commissioning menu), a
check is made to see if the configured sensors are connected. Should a short-circuit or
open-circuit in connection with the sensor or the measuring line occur, a fault status
message will be delivered.
The number of the heating circuit or HC in the error text indicates the heating circuit or
aggregate where a fault occurred.
Number Text Effect
50
[HC 1] error flow sensor
Nonurgent message; must be
acknowledged
55 [HC 2] error flow sensor
Nonurgent message; must be
acknowledged
52
[Heat circuit 3] flow sens
error
Nonurgent message; must be
acknowledged
In the case of a faulty flow temperature sensor, the mixing valve will be driven to the
fully closed position to become inactive (3-position actuator), enabling it to be manually
operated.
Number Text Effect
51
[HC 1] error return sensor
Nonurgent message; must be
acknowledged
56 [HC 2] error return sensor
Nonurgent message; must be
acknowledged
53
[Heat circuit 3] return sens
error
Nonurgent message; must be
acknowledged
In the event of a faulty return temperature sensor, the heating circuit behaves as if no
return temperature sensor was present. Return temperature limitation is deactivated.
Number Text Effect
60
Room temp sensor error
HC 1
Nonurgent message; must not be
acknowledged
65
Room temp sensor error
HC 2
Nonurgent message; must not be
acknowledged
68
Room temp sensor error
HC 3
Nonurgent message; must not be
acknowledged
61
>2 room sensors in heat
circuit 1
Urgent message; must be acknowledged.
More than 2 room temperature sensors in
the same geographical zone
66
>2 room sensors in heat
circuit 2
Urgent message; must be acknowledged.
More than 2 room temperature sensors in
the same geographical zone
69
>2 room sensors in heat
circuit 3
Urgent message; must be acknowledged.
More than 2 room temperature sensors in
the same geographical zone
Number Text Effect
5401
Room master failure in HC 1
Nonurgent message; must not be
acknowledged. No master
5411
Room master failure in HC 2
Nonurgent message; must not be
acknowledged. No master
5421
Room master failure in HC 3
Nonurgent message; must not be
acknowledged. No master
Faulty flow
temperature sensor
Faulty return
temperature sensor
Faulty room temperature
sensor
Faulty room controller
combination