Siemens LMV5 Series Technical Instructions page 234

Error Diag.
Device Display
Code Code
Any #
00
01
02
03
04
05
0A
0B
0C
Internal Fault
16 LMV5
0D
Basic Unit
0E
0F
14
20
21
22
23
40
Section 7
Meaning for the LMV5x System
Fault with Base Unit (LMV5) Ratio Control, O2 Trim, VSD
Basic unit has detected a plausibility fault in the ratio control
system.
Ratio curve of the air actuator is not fully defined
Ratio curve of the fuel actuator is not fully defined
Ratio curve of auxiliary actuator 1 is not fully defined
Ratio curve of auxiliary actuator 2 is not fully defined
Ratio curve of auxiliary actuator 3 is not fully defined
VSD curve is not fully defined
Calculated P-part outside the permissible range
Calculated I-part outside the permissible range
Calculated system delay time outside the permissible range
Calculated O2 setpoint outside the permissible range
Calculated O2 min. value outside the permissible range
Calculated O2 ratio value outside the permissible range
Calculated standardized value lies outside the permissible
range
With hysteresis compensation: Permissible target positioning
range exceeded
The load / point number predefined by the AZL
the permissible range
Unplausible program branch
Unplausible fuel-air ratio phase
Unplausible target positions
The diagnostic code describes the cause of the fault
(see below).
Ensure that actuators that are addressed and activated
have their positions defined. Check curve points to see
if correct values have been entered for the actuator or
VSD. Readjust the ratio curve, if required.
Check parameters (P Low-Fire, I Low-Fire, Tau Low
Fire, P High-Fire, I High-Fire, Tau High-Fire). These
values normally self-set when the delay time is
measured. Check the values of these parameters
against the maximum and minimum ranges. Readjust
O2 control curve if necessary.
The O2 control curve must be 0.1% O2 lower than the
%O2 measured at the ratio control curve, and 0.1%
above the O2 alarm curve. Readjust curves.
Check if the correct values have been entered for the
standardized values.
Readjust O2 trim control, if required, or repeat the
settings.
lies outside
If fault occurs sporadically, reduce electrical noise.
If fault occurs continuously, replace LMV5.
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Corrective Action
SCC Inc.