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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 4E LC Internal Fault Load Controller CAN error *1)
A6 50 LC Short-circuit Pt100 Sensor Short-circuit sensor PT100 (X60.1 X60.4) Check wiring and sensor
A6 51 LC Open-circuit Pt100 Sensor Open-circuit sensor PT100 (X60.1 X60.4) Check wiring and sensor
A6 52 LC Open-circuit Pt 100 Sensor (Line
Compens)
Open-circuit compensation line of sensor
PT100 (X60.2 X60.4)
Check wiring and sensor
A6 53 LC Short-circuit Pt1000 Sensor Short-circuit sensor PT1000 (X60.3
X60.4)
Check wiring and sensor
A6 54 LC Open-circuit PT1000 Sensor Open-circuit sensor PT1000 (X60.3
X60.4)
Check wiring and sensor
A6 55 LC Short-circuit Ni1000 Sensor Short-circuit sensor Ni1000 (X60.3 X60.4)
Check wiring and sensor
A6 56 LC Open-circuit Ni1000 Sensor Open-circuit sensor Ni1000 (X60.3
X60.4)
Check wiring and sensor
A6 57 LC Overvoltage at Input 2 Overvoltage at input 2 (X61) Check wiring and sensor
A6 58 LC Open-circuit / Short-circuit at In-
put 2
Open-circuit / short-circuit input 2 (X61) Check wiring and sensor
A6 59 LC Overvoltage at Input 3 Overvoltage at input 3 (X62) Check wiring and sensor
A6 5A LC Open-circuit / Short-circuit at In-
put 3
Open-circuit / short-circuit input 3 (X62) Check wiring and sensor
A6 60 LC Internal Fault Load Controller Timeout during calibrate_ADC *1)
A6 61 LC Internal Fault Load Controller Timeout during read_conversion *1)
A6 62 LC Internal Fault Load Controller Timeout during calibrate_ADC *1)
A6 63 LC Internal Fault Load Controller Fault during RedInv reading from A/D
converter
*1)
A6 64 LC Internal Fault Load Controller Fault internal A/D converter *1)
A6 65 LC Internal Fault Load Controller Gain register has been changed *1)
A6 66 LC Internal Fault Load Controller Offset register has been changed *1)
A6 67 LC Internal Fault Load Controller Too great / small gain for self-calibration
of A/D converter
*1)
A6 68 LC Internal Fault Load Controller Too great / small offset for self-calibration
of A/D converter
*1)
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