Siemens LMV5 Series Technical Instructions

Error
Code
Diag.
Code
Device Display Meaning for the LMV5x System Corrective Action
Any # - O2 trim control fault See diagnostic code.
01
Missing or faulty
Control
Parameters
PID parameter for controller algorithm missing Check the O2 trim PID control parameters.
02
Missing or faulty
O2 controller
manipulated
variable limitation
The parameters for limiting the O2 controller manipulated
variable have not yet been set
Check the parameters (O2MinManVariable and
O2MaxManVariable ) for limiting the O2 controller
manipulated variable and reset if necessary.
03
O2 controller
manipulated
variable limitation
The O2 controller manipulated variable is limited
1) Check the settings of the O2 trim control.
2) Check that the O2 sensor is installed correctly.
3) Check that the O2MaxManVariable and
O2MinManVariable parameters are set correctly
(especially when copying parameters from devices
before software version 05.00 and 10.10).
04
O2 curves
incomplete
Missing value in the O2 trim control curves
Check for missing values in the O2 control curve, O2
ratio control curve, or O2 minimum value curve.
05
Internal Fault
Basic Unit
- If fault occurs constantly: Replace LMV5
06
Faulty set
temperature or
supply air
temperature
There is no valid supply air temperature for initialization; there
was no valid set temperature when the O2 trim control curves
were set
For temp-compensated start modes (see parameter
Startmode ), an ambient air temperature must be read
during commissioning. Check parameter Adjust.
Temp O2 to see if a valid reading was taken. If not,
use a non temp-compensated start mode or attach an
ambient air sensor and recommission a point on the O2
control curve.
07
O2 controller
operation locking
time for QGO21
too short
The QGO21 requires a longer waiting time than the QGO20
when entering into operation.
Adjust parameter NumberTauSuspend to 40.
08
O2 value too high
during O2
controller
initialization
The O2 controller could not be initialized correctly after entering
into operation because the O2 value was too high (greater than
approx. 13%)
Check for an O2 sensor malfunction. Check for false
air in the stack. Increase startup locking time
(NumberTauSuspend ).
Fault with Base Unit (LMV5) or Connected Components
F3 LMV5
Section 7 Page 59 SCC Inc.
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Siemens LMV5 Series Specifications

General

Brand	Siemens
Model	LMV5 Series
Category	Control Systems
Language	English