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Siemens Building Technologies
Basic Documentation LMV5...
CC1P7550en
HVAC Products
16 Addendum 1: List of fault status messages of LMV5... system
13.08.2004
Error
code
Diagnostic
code
Device
Display
Meaning for the LMV5x system
Troubleshooting
A6
7A
LC
External Fault Load Controller
Excessive voltage value or wrong polarity
PT1000 (X60)
Check wiring of input
A6
7B
LC
External Fault Load Controller
Excessive voltage value or wrong polarity
PWM
*1)
A6 7C LC
External Fault Load
Controller
Excessive voltage value or wrong polarity
voltage measurement input 2 (X61)
Check wiring of input. Check input voltage value
A6
7D
LC
External Fault Load Controller
Excessive voltage value or wrong polarity
current measurement input 2 (X61)
Check wiring of input. Check input actual value
A6
7E
LC
External Fault Load Controller
Excessive voltage value or wrong polarity
voltage measurement input 3 (X62)
Check wiring of input. Check input voltage value
A6
7F
LC
External Fault Load Controller
Excessive voltage value or wrong polarity
current measurement input 3 (X62)
Check wiring of input. Check input actual value
A6
80
LC
Internal Fault Load Controller
Fault during internal muliplexer test PT100
sensor
*1)
A6
81
LC
Internal Fault Load Controller
Fault during internal multiplexer test
PT100 line
*1)
A6
82
LC
Internal Fault Load Controller
Fault during internal multiplexer test
PT100
*1)
A6
90
LC
Internal Fault Load Controller
Number of maximum sync failures ex-
ceeded
*1)
A6
91
LC
Internal Fault Load Controller
Wrong CRC during SYNC message
*1)
A6
92
LC
Internal Fault Load Controller
Wrong CRC during PDO message
*1)
A6
93
LC
Internal Fault Load Controller
Main loop counter does not agree with ba-
sic unit
*1)
A6
96
LC
Internal Fault Load Controller
Fault during multiplexer test
*1)
A6
97
LC
Internal Fault Load Controller
Paraccess with FINISH unsuccessful
*1)
A6
9B
LC
Internal Fault Load Controller
Fault PageAccess, invalid access status
*1)
A6
9C
LC
Internal Fault Load Controller
Fault voltage monitor test
*1)
A6
9E
LC
Internal Fault Load Controller
Fault during readout of PDO message
*1)