Siemens LMV 5 Series, Technical Instructions, Page: 242 / 374

Error
Code Diag.
Code
Device Display Meaning for the LMV5x System Corrective Action
40 Any # Wrong contact position of safety relay
If fault occurs sporadically, reduce electrical noise.
If fault occurs continuously, replace LMV5.
41 Any # Wrong contact position of ignition Check wiring on igniton transformer.
Any # Wrong contact position of a fuel valve relay
01..
FF
The diagnostic value is made up of the following faults or their
combinations (the individual diagnostic codes are added up in
hexadecimal format)
01 Contact position fault safety valve (SV) oil
02 Contact position fault V1 oil
04 Contact position fault V2 oil
08 Contact position fault V3 oil
10 Contact position fault safety valve (SV) gas
20 Contact position fault V1 gas
40 Contact position fault V2 gas
80 Contact position fault pilot valve (PV) gas
Any #
Fault in connection with plausibility check.
For cause of fault, refer to diagnostic code.
If fault occurs sporadically: reduce electrical noise.
01 No fuel selection
Select a fuel externally (by energizing or de-energizing
terminals) or select a fuel through the AZL.
02
No Fuel Train
defined
No defined fuel train parameterized or undefined type of fuel
Select the proper fuel trains for gas and / or oil. See
section on settings.
03 Variable "Train" not defined
04 Variable "Fuel" not defined
05 Operating mode with load controller not defined
06 Prepurge time gas too short
07 Prepurge time oil too short
08 Safety time 1 gas too long
09 Safety time 1 oil too long
0A Ignition off time > TSA1 gas
0B Ignition off time > TSA1 oil
LMV5
42
1) Check to see if any source is feeding back voltage
onto the output. If so, eliminate the voltage source.
2) Check for switches in the safety loop that are
opening and closing again very quickly. This could be a
pressure switch or a low water cut-out that is on the
edge of opening and is "chattering". All outputs are
powered through the safety loop, so the microprocessor
that monitors the outputs can detect this, resulting in a
fault.
Internal Fault
Basic Unit
Internal Fault
Basic Unit
Fault with Base Unit (LMV5)
LMV5
Select a fuel externally (by energizing or de-energizing
terminals) or select a fuel through the AZL.
The time defined by PrepurgeTmeGas(Oil) is less
than the time defined by parameter
MinT_PrepurgeGas(Oil) . Change so that
PrepurgeTmeGas(Oil) is longer than
MinT_PrepurgeGas(Oil) . See section on settings.
The time defined by Max SafetyTGas(Oil) is less than
the time defined by parameter SafetyTme1Gas(Oil) .
Increase Max SafetyTGas(Oil) or decrease
SafetyTme1Gas(Oil) .
If fault occurs sporadically, reduce electrical noise.
Internal Fault
Basic Unit
43
Section 7 Page 34 SCC Inc.
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