Siemens LMV5 Series Technical Instructions page 255

Error Diag.
Device Display
Code Code
Fault with Sensors Connected to Internal Load Controller, in Base Unit (LMV5)
7D
LMV5
Load Internal Fault
A6 7E
Controller Load Controller
Module
7F
80
81
82
LMV5
90
Load Internal Fault
A6
91
Controller Load Controller
92
Module
93
96
97
9B
9C
9E
A0
A1 Internal Fault
Load Controller
A2
A3
A4
LMV5
A5
Load
A6
A6
Controller
Module
Inadmissible
A7 Selection aux
Sensor Cold Start
B0
B1
Internal Fault
B2
Load Controller
B4
B5
Section 7
Meaning for the LMV5x System
Excessive voltage value or wrong polarity current measurement
input 2 (terminal X61)
Excessive voltage value or wrong polarity voltage
measurement input 3 (terminal X62)
Excessive voltage value or wrong polarity current measurement
input 3 (terminal X62)
Fault during internal muliplexer test PT100 sensor
Fault during internal multiplexer test PT100 line
Fault during internal multiplexer test PT100
Max. number of synchronization failures exceeded
Wrong CRC with synchronizations object
Wrong CRC with synchronizations object
Main loop counter does not agree with basic unit
Fault during multiplexer test
Paraccess with FINISH unsuccessful
Fault with Base Unit (LMV5) Internal Load Controller
Fault PageAccess, invalid access status
Fault voltage monitor test
Fault during readout of PDO message
XP smaller than min. value
XP larger than max. value
TN smaller than min. value
TN larger than max. value
TV smaller than min. value
TV larger than max. value
Parameter outside the permissible range
Inadmissible selection of the auxiliary sensor
Red/Inv fault with float variables
Red/Inv fault of a Red/Inv variable
Fault during key value check
Fault in fault routine
Unplausible software interrupt
1) Check wiring and sensor. Re-wire or replace sensors
if necessary.
2) Use shielded cable on sensor wiring.
3) Make sure that sensor wiring is not run next to high
voltage AC wiring.
4) If the diagnostic code indicates excessive voltage,
check input with meter. Trace voltage source.
If fault occurs sporadically, reduce electrical noise.
If fault occurs continuously, replace LMV5.
If fault occurs sporadically, reduce electrical noise.
If fault occurs continuously, replace LMV5.
When using the auxiliary temperature sensor for cold
start, a pressure sensor or temperature transmitter must
be selected at input 2 (terminal X61) via parameter
Sensor Select (PressSensor, TempSensor)
If fault occurs sporadically, reduce electrical noise.
If fault occurs continuously, replace LMV5.
Page 47
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Corrective Action
SCC Inc.