Siemens LMV51 Series, Basic Documentation, Page: 246 / 299

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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
AB 38 O2M Internal Fault O2 Module Fault during copying of a parameter page Reset the unit.
! Caution ! If fault occurred during parameterization: Check
the parameters changed last.
If fault cannot be rectified by the reset: Restore AZL5... pa-
rameters.
Otherwise, replace defective O2 module
AB 3E O2M Internal Fault O2 Module External plausibility fault.
This type of fault covers possible faults
occurring due to invalid presettings in the
drive commands. In response, the preset-
tings will be ignored Reset the unit.
! Caution ! If this fault occurred during parameterization:
Check the parameters changed last.
If fault cannot be rectified by the reset: Restore AZL5... pa-
rameters.
Otherwise, replace defective O2 module
AB 3F O2M Internal Fault O2 Module Internal plausibility fault.
This type of fault covers possible errors
that cannot practically occur *2)
B0 # BU Fault during test of port outputs *1)
B0 01 BU Internal Fault Basic Unit Fault when resetting the set outputs
B0 02 BU Internal Fault Basic Unit Fault during ZR test
B1 01 BU Internal Fault Basic Unit Fault during short-circuit test between in-
puts and outputs *1)
B5 # BU O2 monitor *1)
B5 01 BU Below O2 Min Value O2 value has dropped below O2 min.
value Check setting of the ratio curve.
Increase interval between O2 setpoint and O2 min. value
B5 02 BU O2 Min Values undefined Invalid O2 min. value Define all O2 min. values
B5 03 BU O2 Setpoints undefined Invalid O2 setpoint Define all O2 setpoints
B5 04 BU O2 Delay Time undefined Invalid O2 delay time Adaption at curvepoint 2 or at the highest curvepoint has not
been made. Set these curvepoints
B5 05 BU Actual O2 Value invalid No valid actual O2 value in operation for
>= 3 s O2 module and O2 sensor must be correctly connected.
Mains power supply to the QGO must be connected