Siemens LMV5 Series Technical Instructions page 253

Error Diag.
Device Display
Code Code
Fault with Sensors Connected to Internal Load Controller, in Base Unit (LMV5)
Short-circuit
50
Pt100 Sensor
Open-circuit
51
Pt100 Sensor
Open-circuit Pt
52 100 Sensor (Line
Compens)
Short-circuit
53
Pt1000 Sensor
Open-circuit
54
Pt1000 Sensor
Short-circuit
55
Ni1000 Sensor
Open-circuit
56
Ni1000 Sensor
LMV5
Overvoltage at
Load
57
A6
Input 2
Controller
Module
Open-circuit /
58 Short-circuit
at Input 2
Overvoltage at
59
Input 3
Open-circuit /
5A Short-circuit
at Input 3
Output Value for
5B Analog Output not
available
Sensor already in
use (LC, FGR, or
5C
temp. of the
combustion air)
Section 7
Meaning for the LMV5x System
Short-circuit sensor PT100, terminals X60.1, X60.4
Open-circuit sensor PT100, terminals X60.1, X60.4
Open-circuit compensation line of sensor PT100, terminals
X60.2, X60.4
Short-circuit sensor PT1000, terminals X60.3, X60.4
Open-circuit sensor PT1000, terminals X60.3, X60.4
Short-circuit sensor Ni1000, terminals X60.3, X60.4
Open-circuit sensor Ni1000, terminals X60.3, X60.4
Overvoltage at input 2, terminal X61
Open-circuit / short-circuit input 2, terminal X61
Overvoltage at input 3, terminal X62
Open-circuit / short-circuit input 3, terminal X62
Selected output value for analog output is not available in the
current configuration
An invalid selection was made concerning the configuration of
a temperature sensor.
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Corrective Action
Check temperature sensors connected to X60
terminals. Check wiring and sensor. Check parameter
Sensor Select. Re-wire or replace sensors if
necessary.
1) Check pressure sensors wired to X61. Check wiring
and sensor. Check parameters Sensor Select and Ext
Inp X61 U/I . Re-wire or replace sensors if necessary.
2) If using a 4-20 mA pressure sensor, this fault occurs
when the boiler pulls a vacuum. Replace with a 0-10
Vdc sensor, or a higher range 4-20mA sensor.
1) Check signals wired to X62. Check wiring. Check
parameter Ext Inp X62 U/I . Re-wire if necessary.
Ensure parameter OutValueSelection is a valid
selection based on the devices connected to the basic
unit.
Ensure the following five temperature sensor
configuration parameters have valid selections based
on the devices connected to the basic unit: Sensor
Select , FGR-sensor , SupAirTempSens ,
AirTempX60PT1000 , and FlueGasTempSens .
SCC Inc.