Siemens LMV51 Series Basic Documentation page 246

Error Diagnostic Device
code code
AB 38 O2M
AB 3E O2M
AB 3F O2M
B0 # BU
B0 01 BU
B0 02 BU
B1 01 BU
B5 # BU
B5 01 BU
B5 02 BU
B5 03 BU
B5 04 BU
B5 05 BU
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Siemens Building Technologies Basic Documentation LMV5...
HVAC Products 16 Addendum 1: List of fault status messages of LMV5... system
Display
Internal Fault O2 Module Fault during copying of a parameter page Reset the unit.
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
Internal Fault O2 Module Internal plausibility fault.
This type of fault covers possible errors
that cannot practically occur
Fault during test of port outputs
Internal Fault Basic Unit Fault when resetting the set outputs
Internal Fault Basic Unit Fault during ZR test
Internal Fault Basic Unit Fault during short-circuit test between in-
puts and outputs
O2 monitor
Below O2 Min Value O2 value has dropped below O2 min.
value
O2 Min Values undefined Invalid O2 min. value
O2 Setpoints undefined Invalid O2 setpoint
O2 Delay Time undefined Invalid O2 delay time
Actual O2 Value invalid No valid actual O2 value in operation for
>= 3 s
Meaning for the LMV5x system Troubleshooting
! 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
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
*2)
*1)
*1)
*1)
Check setting of the ratio curve.
Increase interval between O2 setpoint and O2 min. value
Define all O2 min. values
Define all O2 setpoints
Adaption at curvepoint 2 or at the highest curvepoint has not
been made. Set these curvepoints
O2 module and O2 sensor must be correctly connected.
Mains power supply to the QGO must be connected
CC1P7550en
13.08.2004