Siemens LMV51 Series - Page 236

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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 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