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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
E3 --- O2 Fault Feedback O2 Module Basic unit has detected a ROM-CRC fault
in the O2 module when checking its feed-
back signal
Check CAN cabling and terminators as specified
If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace defective module
F0 --- BU Internal Fault Basic Unit Plausibility fault during calculation of inter-
polation values
*1)
F1 # BU Internal Fault Basic Unit Internal fault during calculation of precon-
trol
Check curve setting, check fuel parameters depending on
the selected type of fuel
F1 01
BU Internal Fault Basic Unit
F1 02
BU Internal Fault Basic Unit
F1 03
BU Internal Fault Basic Unit
F1 04
BU Internal Fault Basic Unit
F1 05
BU Internal Fault Basic Unit
F1 06 BU Internal Fault Basic Unit Internal fault calculation of precontrol.
Undefined value in the curves used for the
calculation
F1 07 BU Internal Fault Basic Unit Internal fault calculation of precontrol.
Undefined value for a type of fuel parame-
ter
F2 # BU Code for faulty temperature values from
O2 module when calculating the air rate
change
F2 07 BU Internal Fault Basic Unit O2 module has delivered invalid value
F2 08 BU Flue Gas Temp too high Flue gas temperature outside the permis-
sible value range
Set permissible flue gas temperature to a higher level
F2 0A BU QGO in Heating-up Phase QGO probe not yet sufficiently heated up Wait until probe has reached its operating temperature
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