Siemens Synco700 RMK770 Documentation Handbook page 90

Error messages
Supervision of main flow
temperature
Error message
90/226
Building Technologies
HVAC Products
Main menu > Commissioning > Settings > ... or
Main menu > Settings > Boiler sequence manager > Fault settings > Fault input 3
Operating line
Fault text
Impact of fault
Fault acknowledgement
Fault priority
Fault status signal delay
The effect of the "Stop" fault is that the boiler sequence as a whole will be shut down.
Boilers and pumps will be switched off.
The type of fault input can be parameterized at the relevant terminal.
Main menu > Commissioning > Settings > ... or
Main menu > Settings > Inputs
Operating line
Normal position
Number Text
2391 [Boiler seq] water short-
age
2392 [Boiler sequence] over-
pressure
2393 [Boiler sequence] under-
pressure
For more detailed information about faults, refer to chapter 12 "Function block faults".
In addition to the 3 binary fault inputs, the temperature at the main flow sensor can be
monitored. If the main flow temperature does not reach the required level within the ad-
justable fault status signal delay, an error message will be delivered. It is only monitored
whether the required temperature is reached. If the temperature is too high, no error mes-
sage will be delivered (reason: in the case of minimum limitation of the boiler temperature
or sustained mode, the flow temperature can reach too high a level).
When setting ----, the function is deactivated.
Main menu > Commissioning > Settings > ... or
Main menu > Settings > Boiler sequence manager > Fault settings > Supervision
Operating line
Fault status signal delay
A short-circuit or open-circuit of the main flow temperature sensor causes a plant stop
of the entire boiler sequence.
The main return temperature sensor is less crucial. If faulty, there will be no plant stop.
Number Text
2396 Main flow temp not
reached
330 Main flow sensor error
331 Main return sensor error
Boiler Sequence Controller RMK770
6 Boiler sequence management
Range
A...Z
Stop / No stop
None / Acknowledge /
Acknowledge and reset
Urgent / Not urgent
00.00...59.55 m.s
Range
Open / Closed
Effect
Can be parameterized
Can be parameterized
Can be parameterized
Range
---- / 0...100 h
Effect
Nonurgent message, must be acknowl-
edged, no plant stop
Urgent message; must be acknowledged
and reset, plant stop
Nonurgent message; must be acknowl-
edged, no plant stop
Factory setting
Underpressure
Stop
Acknowledge
Urgent
00.05 m.s
Factory setting
Open
Factory setting
---- h
CE1P3132en
01.03.2005