Siemens LMV5 Quick Start Manual page 172

Error Diag.
Device Display
code code
E1 Any #
Fault Feedback
PLL5..
O2 Module
E3 ---
F0 ---
Any #
01
02
03
F1
Internal Fault
04
Basic Unit
05
06
07
LMV5..
Any #
07
Flue Gas Temp
08
too high
F2
QGO in Heating-
0A
up Phase
LMV5 QSG Rev 4
Meaning for the LMV5x system
Fault with Base Unit (LMV5) or Connected Components
Basic unit has detected a ROM-CRC fault in the VSD module
when checking its feedback signal
Basic unit has detected a ROM-CRC fault
in the O2 module when checking its feedback signal
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
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
Sec 5 Pg 46
Corrective action
1) If fault occurs sporadically: Improve EMC.
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 and the O2 trim must also have 12 points.
If fault occurs constantly: Replace LMV5
Check flue gas temperature to ensure that it is in the
permissible range. Range is 32 to 752 F
Check the termperature of the O2 Sensor (can be viewd
through the AZL). The sensor needs to be a minumum
of 1202 F to operate prooperly. Wait up to 20 minutes
for sensor to reach operating termpeature.
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