Basic Documentation

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Siemens Modular Heating Controller RMH760B CE1P3133en
Building Technologies 8 Main controller and primary controller 2017-09-29
In the case of an error of the 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
58
Prim controller error ret
sensor
Nonurgent message; must be
acknowledged
59
Main contr return sens
error
Nonurgent message; must be
acknowledged
Main controller and primary controller behave as if no return temperature sensor was
present. Limitation of the return temperature is inactive.
Number
Text
Effect
2202
Main contr h’request mod
error
Nonurgent message; must not be
acknowledged
2203
P’contr h’req error
Nonurgent message; must not be
acknowledged
An error at the input is interpreted as "No heat demand".
Number
Text
Effect
2491
[Main pump] overload
Nonurgent message.
Acknowledgement can be parameterized;
factory setting: "Acknowledge and reset"
2492 [Main pump B] overload Nonurgent message.
Acknowledgement can be parameterized;
factory setting: "Acknowledge and reset"
2493
[Main pump] no flow
Nonurgent message; must be
acknowledged and reset
2494 [Main pump B] no flow Nonurgent message; must be
acknowledged and reset
2495
[Main pump B] fault
Urgent message; must not be
acknowledged. Plant stop
Number
Text
Effect
2501 [System pump] overload Nonurgent message.
Acknowledgement can be parameterized;
factory setting: "Acknowledge and reset"
2502
[System pump B]
overload
Nonurgent message.
Acknowledgement can be parameterized;
factory setting: "Acknowledge and reset"
2503 [System pump] no flow Nonurgent message; must be
acknowledged and reset
2504
[System pump] no flow B
Nonurgent message; must be
acknowledged and reset
2505 [System pump] fault Urgent message; must not be
acknowledged. Plant stop
Faulty return sensor
Error in connection with
heat requests
Faulty main pump
Faulty system pump