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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
99
---
All
Internal Fault Basic Unit
CAN is in bus off
Check CAN cabling
*1)
9A
---
All
Internal Fault Basic Unit
CAN warning level.
Fault probably occurred when connecting
or disconnecting a CAN bus user
Check CAN cabling
*1)
9B
#
All
Internal Fault Basic Unit
CAN queue overrun
Check CAN cabling
*1)
9B
01
All
Internal Fault Basic Unit
Overrun of RX queue
9B
02
All
Internal Fault Basic Unit
Overrun of TX queue
A0
#
SA
Auxiliary actuator 3 has detected a fault
and reported it to the basic unit.
Type of fault: See diagnostic code
Check CAN cabling and terminators as specified
If fault occurs sporadically: Improve EMC
If fault occurs constantly: Replace defective actuator
A0
See A1
See A1
See A1
See A1
See A1
A1
#
SA
Air actuator has detected own fault and
reported it to the basic unit.
Type of fault: See diagnostic code
Check CAN cabling and terminators as specified
If fault occurs sporadically: Improve EMC
If fault occurs constantly: Replace defective actuator
A1
01
SA
Internal Fault Air Actuator
CRC fault during ROM test
A1
02
SA
Internal Fault Air Actuator
CRC fault during RAM test
A1
04
SA
Internal Fault Air Actuator
Fault during key value check
A1
05
SA
Internal Fault Air Actuator
Error code for time block overflow
A1
07
SA
Internal Fault Air Actuator
Sync fault or CRC fault
A1
08
SA
Internal Fault Air Actuator
Error code for main loop counter
A1
09
SA
Internal Fault Air Actuator
Fault during stack test
A1
0C
SA
Overtemperature Air Actuator
Temperature warning and shutdown
Check housing temperature (max. 60 °C)
A1
0D
SA
Internal Fault Air Actuator
Actuator turns in the wrong direction