Siemens LMV5 Series Technical Instructions page 266

Error Diag.
Device Display
Code Code
Internal Fault
F0 Any #
Basic Unit
Any #
01
02
03
Internal Fault
04
F1
Basic Unit
05
06
LMV5
07
Any #
Internal Fault
Basic Unit
07
Flue Gas Temp
08
too high
F2
QGO in Heating-
0A
up Phase
Section 7
Meaning for the LMV5x System
Fault with Base Unit (LMV5) or Connected Components
Plausibility fault during calculation of interpolation values
Internal fault during calculation of precontrol
-
-
-
-
-
Internal fault calculation of precontrol. Undefined value in the
curves used for the calculation
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
O2 module has delivered invalid value
Flue gas temperature outside the permissible value range
QGO probe not yet sufficiently heated up
1) If fault occurs sporadically: Reduce electrical noise.
2) If fault occurs constantly: Replace LMV5.
1) Check to make sure that all curves (Ratio control, O2
guard, and O2 control) are defined at every point in the
firing range. If the ratio control curve has 12 points, the
O2 guard must have 12 points, and the O2 trim must
have 11 points.
See diagnostic code.
If fault occurs constantly: Replace LMV5
Increase parameter MaxTempFlGasGas(Oil) or
decrease flue gas temperature.
Check the temperature of the O2 Sensor via parameter
QGO SensorTemp . The sensor needs to be a
minumum of 1202 °F to operate properly. Wait up to 20
minutes for sensor to reach operating termpeature.
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Corrective Action
SCC Inc.