Siemens LMV51 Series Basic Documentation page 247

Error Diagnostic Device
code code
B5 06 BU
B5 07 BU
BA 01 BU
BF
C5 # #
C5 01..2F #
C5 01 BU
C5 02 LC
Siemens Building Technologies Basic Documentation LMV5...
HVAC Products 16 Addendum 1: List of fault status messages of LMV5... system
Display
O2 Value Prepurging not During prepurging, the parameterized air
reached oxygen content of +-2 % was not reached
O2 Value in Operation too high O2 value of 15 % in operation was ex-
ceeded
O2 Sensor Test aborted O2 sensor test was not successful. E.g.
reset of O2 module during probe test
O2 Control and Limiter auto- Fault occurred in connection with O2 trim
mate deactivated control or with the O2 monitor. It led to
automatic deactivation of O2 trim control
or the O2 monitor
Version Conflict When comparing the versions of the indi-
vidual units, the AZL5... has detected old
versions
Version Conflict The diagnostic value is made up of the fol-
lowing faults or their combinations (the in-
dividual diagnostic codes are added up in
hexadecimal format)
Version Conflict Software of the basic unit too old
Version Conflict Software of the load controller too old
Meaning for the LMV5x system Troubleshooting
At the end of prepurging, the parameterized "O2 content air"
must be reached.
Prepurging may not be sufficiently long for the air to reach
the O2 content in the flueways.
The value must have been parameterized at an air oxygen
content of 20.9 %.
If fault occurs after more than 1 year, QGO may have
reached the end of its service life -> replace
Check mechanical and electrical mounting of the QGO sen-
sor
*2)
The fault history shows the reason for switching off just
before the "BF" fault
Before replacing any units, start the system and wait about
1 minute (until, after entering the parameter level, the dis-
play "Parameters will be updated" disappears).
Then, make a reset. Replace the unit only if the fault mes-
sage does not disappear.
Replace the relevant units by new versions
Replace basic unit
Replace basic unit
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CC1P7550en
13.08.2004