Siemens LMV5 Series Basic Documentation page 193

Error Diagnostic Device
code code
05 # BU
05 01 BU
05 02 BU
06 # BU
06 01 BU
06 02 BU
06 03 BU
06 04 BU
10 # BU
10 01 BU
10 02 BU
10 03 BU
10 04 BU
10 05 BU
10 06 BU
10 07 BU
10 08 BU
10 09 BU
10 0A BU
10 0B BU
Siemens Building Technologies Basic Documentation LMV51...
HVAC Products 15 Addendum 1: List of fault status messages of LMV51... system
Display
Fault Flame Detector Test Fault during test of the flame signal
amplifier
Fault Flame Detector Test Fault during test of the flame signal
amplifier
Fault Flame Detector Test Crosstalk fault between test pin and
flame signal amplifier channel
Internal Fault Basic Unit Fault internal hardware tests
Internal Fault Basic Unit Fault during test of the ignition relay
Internal Fault Basic Unit Fault during test of the safety relay
Internal Fault Basic Unit Fault during voltage supervision test
Internal Fault Basic Unit Relay voltage not switched off after reset
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
Internal Fault Basic Unit Load controller on / off
Internal Fault Basic Unit Fan contact
Internal Fault Basic Unit Selection of oil-firing
Internal Fault Basic Unit Selection of gas-firing
Internal Fault Basic Unit Reset
Internal Fault Basic Unit Pressure switch oil maximum
Internal Fault Basic Unit Pressure switch oil minimum
Internal Fault Basic Unit Pressure switch valve proving
Internal Fault Basic Unit Safety valve oil feedback
Internal Fault Basic Unit Fuel valve 1 oil feedback
Internal Fault Basic Unit Fuel valve 2 oil feedback
Meaning for the LMV5x system Troubleshooting
If fault occurs sporadically: Improve EMC
If fault occurs constantly: Replace flame detector or replace
defective basic unit
*1)
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)
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CC1P7550en
01.10.2003