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Siemens Building Technologies Basic Documentation LMV51... CC1P7550en
HVAC Products 15 Addendum 1: List of fault status messages of LMV51... system 01.10.2003
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
amplifier
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
amplifier
05 02 BU Fault Flame Detector Test Crosstalk fault between test pin and
flame signal amplifier channel
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
diode, or a short-circuit in the power
supply of the contact feedback network.
The diagnostic codes indicates the input
affected
Check wiring of outputs, check connection of the neutral
conductor 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
10 08 BU Internal Fault Basic Unit Pressure switch valve proving
10 09 BU Internal Fault Basic Unit Safety valve oil feedback
10 0A BU Internal Fault Basic Unit Fuel valve 1 oil feedback
10 0B BU Internal Fault Basic Unit Fuel valve 2 oil feedback
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