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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
16
22
BU
Internal Fault Basic Unit
With a switch instruction, none of the de-
fined cases was satisfied
*1)
16
23
BU
Internal Fault Basic Unit
With the switch instruction, no defined ratio
control phase has been identified
*1)
16
40
BU
Internal Fault Basic Unit
Unplausible target positions
*1)
17
---
BU
Internal Fault Basic Unit
(Internal) communication error of ELV
*1)
17
3F
BU
Internal Fault Basic Unit
Detection of different data when making
the data comparison
17
01
BU
Internal Fault Basic Unit
Timeout with program synchronization
prior to data transmission
17
02
BU
Internal Fault Basic Unit
Timeout with data transmission
17
03
BU
Internal Fault Basic Unit
CRC fault during data transmission
18
---
BU
Invalid Curve Data
Invalid curve data
Checking the curve data for invalid entries:
Valid load range: 0.0 % - 100.0 %
Valid positioning range: 0.0° - 90.0°
Valid speed range: 0.0 % - 100 %
In the case of a deviation from the valid range when com-
missioning the unit: Readjustment to the valid value range.
If fault occurs after the unit has previously worked correctly:
Replace defective basic unit
19
#
SA
Internal Fault Actuator
Basic unit (ratio control system) has de-
tected a fault when comparing potentiome-
ter channels A and B. Diagnostic code
shows on which actuator the fault oc-
curred. See diagnostic code
Check CAN cabling.
If fault occurs sporadically: Improve EMC.
If fault occurs constantly: Replace actuator (see diagnostic
code)