Siemens LMV5 Series Basic Documentation page 233

Error Diagnostic Device
code code
07
F1 BU
F2 # BU
F2 07 BU
F2 08 BU
F2 0A BU
F3 01 BU
Siemens Building Technologies Basic Documentation LMV51...
HVAC Products 15 Addendum 1: List of fault status messages of LMV51... system
Display
Internal Fault Basic Unit Internal fault calculation of precontrol.
Undefined value for a type of fuel
parameter
Code for faulty temperature values from
O2 module when calculating the air rate
change
Internal Fault Basic Unit O2 module has delivered invalid value
Flue Gas Temp too high Flue gas temperature outside the
permissible value range
QGO in Heating-up Phase QGO probe not yet sufficiently heated up
Missing or faulty Control PID parameter for controller algorithm
Parameters missing
Meaning for the LMV5x system Troubleshooting
Set permissible flue gas temperature to a higher level
Wait until probe has reached its operating temperature
Check controller parameters
*1)
If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace defective module
*2)
If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace defective module
233/278
CC1P7550en
01.10.2003