Siemens LMV5 Series Technical Instructions page 268

Error Diag.
Device Display
Code Code
Any # -
Fault with
01 Feedback from
O2 Module
F4 PLL5
Implausible
15 supply air
temperature value
Implausible flue
16 gas temperature
value
Fault with
F5 01 Feedback from
Load Controller
Any # -
Flue gas
recirculation
01
automatically
LMV5 deactivated
Invalid
F6
parameterization
of flue gas
recirculation
02
operating mode /
flue gas
recirculation
sensor
Section 7
Meaning for the LMV5x System
Fault with Base Unit (LMV5) or Connected Components
A fault occurred in the O2 module in connection with the flue
gas recirculation
The flue gas temperature sensor PLL52
selected, but no response is registered on the CAN
Temperature of supply air sensor on PLL52 input X87 is
outside of the valid range (0 to 1472 °F)
Value of flue gas temperature sensor on PLL52 input X87 is
outside of the valid range (0 to 1472 °F)
The Pt1000/Ni1000 on the load controller input X60 is selected,
but no response is registered on the CAN
A fault occurred in connection with the flue gas recirculation
function
The flue gas recirculation function was automatically
deactivated
Invalid parameterization of flue gas recirculation operating
mode / flue gas recirculation sensor in connection with O2
controller / O2 alarm
See diagnostic code.
input X86 is
Check CANbus and main power wiring to the PLL5.
Check wiring of the ambient air sensor connected to
terminal X87. Check ambient air temperature.
Check wiring of the flue gas temperature sensor
connected to terminal X86. Check flue gas temperature.
Check CAN wiring. If fault occurs sporadically, reduce
electrical noise. If fault occurs constantly, replace the
defective unit.
See diagnostic code.
Check the fault history for the error that happened just
before fault F6 for the cause of the automatic
deactivation.
Set flue gas recirculation operating mode (FGR-Mode )
from TCautoDeact to Temp.comp, or set flue gas
recirculation temperature (FGR-sensor ) to X60
Page 60
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Corrective Action
SCC Inc.