
236/301
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
69
LC
Internal Fault Load Controller
Fault internal A/D converter
*1)
A6
6A
LC
Internal Fault Load Controller
Fault during PWM test
*1)
A6
6B
LC
Internal Fault Load Controller
Faulty reference voltage
*1)
A6
6C
LC
Internal Fault Load Controller
Fault transmitter power supply
*1)
A6
6D
LC
Internal Fault Load Controller
Fault analog output, voltage deviation too
great
*1)
A6
6E
LC
Internal Fault Load Controller
Fault during resistance test PT100 input
(X60)
*1)
A6
6F
LC
Internal Fault Load Controller
Fault during diode test PT100 input
*1)
A6
70
LC
External Fault Load Controller
Measured value varies too much:
PT100 sensor (X60)
Check wiring of input.
A6
71
LC
External Fault Load Controller
Measured value varies too much:
PT100 line (X60)
Check wiring of input.
A6
72
LC
External Fault Load Controller
Measured value varies too much:
PT1000 (X60)
Check wiring of input.
A6
73
LC
External Fault Load Controller
Measured value varies too much:
PWM
*1)
A6
74
LC
External Fault Load Controller
Measured value varies too much:
Voltage measurement input 2 (X61)
Check wiring of input. Check input voltage value for hum-
ming voltages
A6
75
LC
External Fault Load Controller
Measured value varies too much:
Current measurement input 2 (X61)
Check wiring of input. Check input voltage value for hum-
ming voltages
A6
76
LC
External Fault Load Controller
Measured value varies too much:
Voltage measurement input 3 (X62)
Check wiring of input. Check input voltage value for hum-
ming voltages
A6
77
LC
External Fault Load Controller
Measured value varies too much:
Current measurement input 3 (X62)
Check wiring of input. Check input voltage value for hum-
ming voltages
A6
78
LC
External Fault Load Controller
Excessive voltage value or wrong polarity
PT100 sensor (X60)
Check wiring of input
A6
79
LC
External Fault Load Controller
Excessive voltage value or wrong polarity
PT100 line (X60)
Check wiring of input