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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
05
#
BU
Fault Flame Detector Test
Fault during test of the flame signal am-
plifier
If fault occurs sporadically: Improve EMC
If fault occurs constantly: Replace flame detector or replace
defective basic unit
05
01
BU
Fault Flame Detector Test
Fault during test of the flame signal am-
plifier
05
02
BU
Fault Flame Detector Test
Crosstalk fault between test pin and
flame signal amplifier channel (with
LMV52... FSVchannel QRI... / QRB...)
05
03
BU
Fault Flame Detector Test
(Only LMV52...) crosstalk fault between
test pin and FSV channel ION
06
#
BU
Internal Fault Basic Unit
Fault internal hardware tests
*1)
06 01 BU
Internal Fault Basic Unit
Fault during test of the ignition relay
06 02 BU
Internal Fault Basic Unit
Fault during test of the safety relay
06 03 BU
Internal Fault Basic Unit
Fault during voltage supervision test
06 04 BU
Internal Fault Basic Unit
Relay voltage not switched off after reset
10
#
BU
Internal Fault Basic Unit
Basic unit has detected an inadmissible
circuit at one of the outputs, a faulty di-
ode, or a short-circuit in the power supply
of the contact feedback network. The di-
agnostic codes indicates the input af-
fected
Check wiring of outputs, check connection of the neutral con-
ductor to the devices used.
The fault may be caused by capacitive loads which, with the
relay deenergized, are the reason the voltage takes more
than about 10 ms to drop to zero.
Check wiring to the load
*1)
10
01
BU
Internal Fault Basic Unit
Load controller on / off
10
02
BU
Internal Fault Basic Unit
Fan contact
10
03
BU
Internal Fault Basic Unit
Selection of oil-firing
10
04
BU
Internal Fault Basic Unit
Selection of gas-firing
10
05
BU
Internal Fault Basic Unit
Reset
10
06
BU
Internal Fault Basic Unit
Pressure switch oil maximum
10
07
BU
Internal Fault Basic Unit
Pressure switch oil minimum