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Building Technologies Division User Manual LMS14... CC1U7471en
6 The settings in detail 07.05.2014
Error reactions
Type of error Function Operating state Lockout Parameter
Faulty Unfavorable Diagnostics/
error display
Start
prevention
Immediately After
(min)
After number of errors
(in 24 hours)
3639.1] Burner has shut
down
24h [3914.1]
Max. temperature
gradient exceeded
TkIst > MaxRate Trise
flow [4091.1]
Small heat draw
Parameter:
Number of errors temp gradient
in 24 h Numbr err, Tgrad 24h
[3913.1]
[4091.1] MaxRate Trise flow
[3911.1] Dur bli’cir Tgradien
[3913.1] Numbr err, Tgrad 24h
T too great > maximum delta
between flow and return
Output reduced by 20%
[3916.1] MaxTdiff flow/return
T > MaxDelta flow-
return + SLT delta-T
offset partial load
Output reduced to
minimum
[6604.1]
SLT T diff low-fire
T > MaxDelta flow-
return + SLT delta-T
offset start
prevention
Parameter:
Number of errors delta-T within
24 h
[6605.1]
SLT T diff start prev
[3921.1] Numbre err, Tdiff 24h
Return temperature
higher than flow
Boiler return temperature
> actual value of boiler
temperature +
Switching differential
return higher than flow
()
Parameter:
Number of errors return higher
than flow in 24 h
[3923.1] SwiDiff Tret>Tflow
¹) Function must be separately activated by Siemens
Legend
Line no. Meaning
T
TKIst
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