Siemens LMV 5 Series, Технические инструкции, Страница: 217 / 374

LMV Series Technical Instructions
Document No. LV5 ‐ 1000
SCC Inc. Page 9 Section 7
Open Circuit / Short Circuit Sensor Faults – Error Code A6 (Diagnostics 50…5A)
An error code A6 (diagnostic code 50…5A) means that the LMV5 is configured for a certain type
of sensor, but it is not detecting that the sensor is connected. This means that a parameter in
the LMV5 is set incorrectly, the wiring of the sensor is incorrect, or the sensor has failed.
Note : Some of the fault code messages refer to Input 2 or Input 3. Input 2 is terminal X61
which is used for pressure sensors. Input 3 is terminal X62 which is used for remote setpoint
and modulation signals.
Check the following:
1. Ensure that the parameters used to program the analog inputs are set correctly:

LC_OptgMode

Sensor Select

Ext Inp X61 U/I

Ext Inp X62 U/I
See Section 3 for information on how these parameters should be set.
2. If all of the above parameters are set correctly, check the wiring of the attached sensors.
See Section 2 for information on how to wire sensors to the LMV5.
3. On a steam boiler, a temperature sensor can be used in addition to the pressure sensor for
the cold start function. If this is the case, check the setting of parameter AdditionalSens .
See Section 3 for more information on how to set this parameter.
4. An additional FGR temperature sensor can be installed to perform an FGR hold function. If
parameter FGR ‐ Mode is set to “temperature”, “temp.contr.”, or “TCautoDeact”, an FGR
sensor is expected to be wired into terminal X60 or X86, depending on the setting of FGR ‐
sensor . If this parameter is set to X60, check that the sensor is wired correctly.
5. If O
2
trim is being used, an ambient air temperature sensor can be wired into terminal X60.
Check the setting of parameter AirTempX60PT1000 . If this is set to activated, a Pt1000
temperature sensor is expected to be wired into terminal X60.
HOME