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Siemens Building Technologies Basic Documentation LMV5... CC1P7550en
HVAC Products 16 Addendum 1: List of fault status messages of LMV5... system 13.08.2004
Error
code
Diagnostic
code
Device Display Meaning for the LMV5x system Troubleshooting
43 09 BU Internal Fault Basic Unit Safety time 1 oil too long
43 0A BU Internal Fault Basic Unit Ignition off time > TSA1 gas
43 0B BU Internal Fault Basic Unit Ignition off time > TSA1 oil
43 0C BU Internal Fault Basic Unit Safety time 2 gas too long
43 0D BU Internal Fault Basic Unit Safety time 2 gas too long
44 # BU Fault at deactivated inputs Deactivate input or do not connect
44 01 BU Controller connected but deacti-
vated
Controller input connected but deacti-
vated
44 02 BU Air Press Switch connected but
deactivated
APS connected but deactivated
44 03 BU FCC / FGR – APS connected but
deactivated
FCC / FGR – APS connected but deacti-
vated
44 04 BU Gas Pressure min connected but
deactivated
GP-Min connected but deactivated
44 05 BU Gas Pressure max connected but
deactivated
GP-Max connected but deactivated
44 06 BU Oil Pressure min connected but
deactivated
OP-Min connected but deactivated
44 07 BU Oil Pressure max connected but
deactivated
OP-Max connected but deactivated
44 08 BU Start Signal Oil connected but de-
activated
Start signal oil connected but deactivated
44 09 BU HO Start connected but deacti-
vated
HO start connected but deactivated
44 0A BU Start Signal Gas connected but
deactivated
Start signal gas connected but deacti-
vated
45 --- BU Locked by SLT Shutdown via SLT test SLT was activated and safety shutdown was triggered (usu-
ally via the SLT)
46 # BU Programstop active Program stop was activated. System has
stopped at the parameterized position
Deactivate the program stop if no longer required
46 01 BU Programstop active Program stop "STOP_DR_PREP" in
Phase 24 active
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