Siemens LMS14 User Manual page 254

Error handling routines
Additional parameters
Info/diagnostics
254/617
Building Technologies Division
If an error occurs and the limit thermostat cuts out because the set temperature is
exceeded, the fan or the boiler pump (Q1) (if not already running) must be activated to
dissipate the heat.
Response at the respective temperature levels when the limit thermostat's cutout
temperature is exceeded:

Pump and fan overrun
For all the aforementioned errors, following applies:
If the Cutout temp LT (2531) is exceeded, the boiler pump (Q1) is activated to dissipate
the heat and – optionally – heating circuits are forced to draw heat.
If the TempBoilerMaxSLTSec
Both will stay activated until the respective trigger criterion no longer exists, at
maximum for the Postpurge time TL max (9541).
Line no. Operating line
[3911.1] Dur bli'cir Tgradien
[3912.1] Dur bli'cir Tr>Tf
[4091.1] MaxRate Trise flow
[3913.1] Numbr err, Tgrad 24h
[3914.1] Numbr err, SLT 24h
[3916.1] MaxTdiff flow/return
[3921.1] Numbre err, Tdiff 24h
[3923.1] SwiDiff Tret>Tflow
[3924.1] Numbr err, Tr>Tf 24h
[3639.1] TempBoilerMaxSLTSec
[3925.1] TempRetMaxSLTSec
9541 Postpurge time TL max
Line no. Operating line
8310 Boiler temp
8314 Boiler return temp
User Manual LMS14...
6 The settings in detail
[3639.1]
is exceeded, the fan is activated also.
CC1U7471en
28.01.2015