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Building Technologies
Boiler Sequence Controller RMK770
CE1P3132en
HVAC Products
9 Precontrol
23.04.2009
9.10 Fault
handling
This section 9.10 shows the text for each fault number with which the controller is
supplied. It can be changed on the password level.
When commissioning is completed (
Commissioning
menu quit), the system checks
whether the configured sensors have been connected. In the event of an open-circuit or
short-circuit, a fault status message is delivered.
Number Text
(as
supplied)
Effect
57
Prim controller error flow
sensor
Nonurgent message; must be acknowl-
edged
In the case of an error of the flow temperature sensor, the mixing valve is driven to the
fully closed position to become inactive (3-position actuator) enabling it to be manually
operated.
Number Text
(as
supplied)
Effect
58
Prim controller error ret
sensor
Nonurgent message; must be acknowledged
The primary controller behaves as if no return temperature sensor was used. Limitation
of the return temperature is inactive.
Number Text
Effect
2203
Prim contr h’request mod
error
Nonurgent message; must not be acknowl-
edged
An error at the input is interpreted as “No heat demand”.
No.
Text (as supplied)
Effect
2501
[System pump] overload
Nonurgent message. Acknowledgement can
be parameterized; factory setting: “Acknowl-
edge“
2502
[System pump B] overload
Nonurgent message. Acknowledgement can
be parameterized; factory setting: “Acknowl-
edge“
2503
[System pump] no flow
Nonurgent message; must be acknowl-
edged and reset
2504
[System pump B] no flow
Nonurgent message; must be acknowl-
edged and reset
2505
[System pump B] fault
Urgent message, must not be acknowl-
edged, plant stop
9.11 Diagnostic
choices
Main menu > Primary controller > Inputs/setpoints
Operating line
Range
Actual value flow temp
…°C
Flow temperature setpoint
…°C
Actual value return temp
…°C
Return temperature max
…°C
Heat request modulating
---- ( = not connected) / …°C
Heating curve request 2-pos
0 / 1 (1 = request)
DHW request 2-pos
0 / 1 (1 = request)
Frost prot request 2-pos
0 / 1 (1 = request)
[System pump] overload
0 / 1 (1 = overload)
Note
Fault handling
Fault sensors
Fault return
temperature
Fault heat request
modulating
Fault primary
controller or
system pump
