List Of Error Messages Of Lmv5 System - Siemens LMV52 series User Manual

5
Error Diagnostic
Device
code code
B6 # LMV5
B6 01 LMV5
B6 02 LMV5
B6 03 LMV5
B6 04 LMV5
B6 05 LMV5
B7 # LMV5
B7 00..3E LMV5...
B7 01 O2M
B7 02 O2M
B7 04 O2M
B7 05 O2M
B7 07 O2M
B7 08 O2M
B7 09 O2M
B7 0A O2M
B7 10 O2M
B7 12 O2M
Building Technologies Division User Manual LMV5...

List of error messages of LMV5 system

List of error messages of LMV5 system
Display
COx value invalid
COx monitoring time COx alarm
undefined
COx monitoring time constant Tau
undefined
COx limit exceeded in operation
COx limit exceeded in prepurge
COx supervision
No valid COx signal from PLL52
No valid COx signal from PLL52
No valid COx signal from PLL52
No valid COx signal from PLL52
No valid COx signal from PLL52
No valid COx signal from PLL52
No valid COx signal from PLL52
No valid COx signal from PLL52
No valid COx signal from PLL52
No valid COx signal from PLL52
No valid COx signal from PLL52
Meaning for the LMV5 system
COx alarm error messages
COx signal is not within the defined range
of values or there is a cable break.
No valid value has been entered in the
parameter Time COx Alarm
Missing path time constant
COx indicated by COx sensor
COx indicated by COx sensor
PLL52 error during active COx supervision
Error messages from the PLL52... when
COx supervision is active
CRC fault during ROM test
CRC fault during RAM test
Fault during key value check
Error code for time block overflow
Sync fault or CRC fault
Error code for main loop counter
Fault during stack test
Feedback values invalid
Nernst voltage outside the valid range
Thermo couple voltage outside the valid
range
Troubleshooting
Check connection between the COx sensor and PLL52, check
cable connection on the PLL52 basic unit, correct resistance
dimensioning
Set Time COx Alarm parameter correctly
Perform adaption of O2 trim control, Tau Low-Fire and / or Tau
High-Fire have no valid value
Optimize combustion settings
Optimize combustion settings
Check the supply air temperature at the connection (short-
circuit, open-circuit) Check the ambient temperature
If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace the defective O2 module
Check the connection (correct polarity, short-circuit)
Check connections (polarity, short-circuit, open-circuit).
Check power supply to the O2 module.
Check fuse F2 on the O2 module.
Check heating control on the QGO.
13/17
CC1A7550.5en
07.07.2015