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Building Technologies Boiler sequence controller RMK770 CE1P3132en
HVAC Products 10 Heating circuit control 23.04.2009
The ventilation controller’s room temperature sensor must not be installed in the extract
air duct! Otherwise, functions “Room temperature influence” and “Type of optimization”
with room temperature may not be activated.
10.11 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. In the event of an open-circuit
or short-circuit, a fault status message is delivered.
The RMK770 has maximum 1 heating circuit. Index 1 indicates that the sensor error
occurred in connection with this heating circuit.
This section shows the text for each fault number with which the controller is supplied.
Text with [HC …] can be changed on the password level.
Number Text (as supplied) Effect
50 [HC 1] error flow sensor
Nonurgent message; must be acknowl-
edged
In the event of a faulty flow sensor, the mixing valve is driven to the fully closed position
to become inactive (in case of a 3-position actuator); it can then be operated manually.
Number Text (as supplied) Effect
51 [HC 1] error return sensor
Nonurgent message; must be acknowl-
edged
Behaves like a heating circuit without return temperature sensor. Return temperature
limitation is inactive.
Number Text Effect
60 Room sensor error plant
1
Nonurgent message; must not be acknowl-
edged
61 >2 room sensors in plant
1
Urgent message; must be acknowledged.
More than 2 room temperature sensors in
the same geographical zone
Number Text Effect
10 Outside temp sensor
error
Nonurgent message; must not be acknowl-
edged
11 >1 outside temperature
sensor
Urgent message; must be acknowledged.
More than 1 outside sensor in the same
outside temperature zone.
12 Outs sensor simulation
active
Nonurgent message; must not be acknowl-
edged
Number Text Effect
5401 Room master failure in
plant 1
Nonurgent message; must not be acknowl-
edged
No master
5402 >1 room master [1]
Nonurgent message; must not be acknowl-
edged.
More than 1 master
Important
Note
Sensor fault
flow temperature
Sensor fault
return temperature
Sensor fault
room temperature
Sensor fault
outside temperature
Fault room control
combination
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