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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
A9 1B
VSD
module Internal Fault VSD Module
Fault when copying a parameter page
Reset the unit.
! Caution ! If fault occurred during parameterization: Check
the parameters changed last.
If fault cannot be rectified by the reset: Restore AZL… pa-
rameters.
Otherwise, replace defective basic unit
A9 1E
VSD
module Internal Fault VSD Module
External plausibility fault. This type of fault
covers possible faults occurring due to in-
valid presettings in the drive commands.
In response, the presettings will be ig-
nored
Check the special positions for valid value range (0-100 %)
A9 1F
VSD
module Internal Fault VSD Module
Internal plausibility fault. This type of fault
detects faults that cannot practically oc-
cur...
*1)
AB
#
O2M
Fault O2 Module
The O2 module has detected own fault
and reported it to the basic unit
AB
01
O2M
Internal Fault O2 Module
CRC fault during ROM test
*2)
AB
02
O2M
Internal Fault O2 Module
CRC fault during RAM test
*2)
AB
04
O2M
Internal Fault O2 Module
Fault during key value check
*2)
AB
05
O2M
Internal Fault O2 Module
Error code for time block overflow
*2)
AB
07
O2M
Internal Fault O2 Module
Sync fault or CRC fault
*2)
AB
08
O2M
Internal Fault O2 Module
Error code for main loop counter
*2)
AB
09
O2M
Internal Fault O2 Module
Fault during stack test
*2)
AB
0A
O2M
Internal Fault O2 Module
Feedback values invalid
*2)
AB
10
O2M
Unplaus Value Nernst Voltage
O2 Module
Nernst voltage outside the valid range
Check the connection (correct polarity, short-circuit)
AB 12 O2M
Unplaus
Value
Thermocouple
O2 Module
Thermocouple voltage outside the valid
range
Check connections (polarity, short-circuit, open-circuit).
Check power supply to the O2 module.
Check fuse F2 on the O2 module.
Check heating control on the QGO.