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Building Technologies
Modular Heating Controller RMH760B
CE1P3133en
HVAC Products
6 Boiler temperature control
05.02.2007
6.11 Fault handling
Number Text
Effect
40
Boiler sensor error
Urgent message; must be acknowledged.
No boiler stop; the burner is shut down
41
Boiler return sensor error
Nonurgent message; must be acknowl-
edged. No boiler stop
In the case of plant with mixing valve for
the maintained boiler return temperature,
the mixing valve will be driven to the fully
closed position when the return tempera-
ture sensor is faulty and then deenergized
to make possible manual adjustment.
Otherwise, the control system behaves like
a plant without return temperature sensor
321
Flue gas temp sensor error
Nonurgent message; must be acknowl-
edged. No boiler stop
Number Text
Effect
2301
Boiler burner fault
Urgent message.
Acknowledgement can be parameterized;
factory setting: “Acknowledge”.
Boiler stop
2311
Burner no checkback signal Urgent message; must be acknowledged
and reset. Effect can be parameterized;
factory setting: “Stop”. Boiler stop
Number Text
Effect
2321
Boiler water shortage
Priority, effect and acknowledgement can
be parameterized.
Factory setting: “Urgent”. Boiler stop, must
be acknowledged
2331
Boiler overpressure
Priority, effect and acknowledgement can
be parameterized.
Factory setting: “Urgent”. Boiler stop, must
be acknowledged
2341
Boiler underpressure
Priority, effect and acknowledgement can
be parameterized.
Factory setting: “Urgent”. Boiler stop, must
be acknowledged
2351
Shutoff valve no checkb
signal
Urgent message; must be acknowledged
and reset. Boiler stop
2361
Flue gas overtemperature
Priority and effect can be parameterized.
Factory setting: “Nonurgent”. No boiler
stop, must be acknowledged and reset
Number Text
Effect
2401
[Boiler pump] overload
Nonurgent message.
Acknowledgement can be parameterized;
factory setting: “Acknowledge and reset“.
No boiler stop
Sensor error
Burner faults
Boiler faults
Faults of the boiler pump
