Siemens LMV37.4 Series Basic Documentation page 240

Error
Diagnostic code
code
20 #
0
1
21 #
0
1
64
22 OFF S #
0
1
3
5
17
19
21
23
65
67
69
71
81
83
85
87
23 #
240/267
Building Technologies
Meaning for the LMV37.4
Pressure switch-min
No minimum gas / oil pressure
Gas shortage / prevention of startup
Pressure switch-max / POC
Pressure switch-max: Max. gas / oil pressure exceeded

POC: POC open (software version V02.00)

POC closed (software version V02.00)
POC open –prevention of startup (software version
Safety loop / burner flange
Safety loop / burner flange open
Safety loop / burner flange open / prevention of startup
Safety loop/burner flange, extraneous light – start prevention
Safety loop/burner flange, air pressure – start prevention
Safety loop/burner flange, combustion pressure – start
prevention
Safety loop/burner flange, extraneous light, combustion
pressure – start prevention
Safety loop/burner flange, air pressure, combustion pressure –
start prevention
Safety loop/burner flange, extraneous light, air pressure,
combustion pressure – start prevention
Safety loop/burner flange, POC – start prevention
Safety loop/burner flange, extraneous light, POC – start
prevention
Safety loop/burner flange, air pressure, POC – start prevention
Safety loop/burner flange, extraneous light, air pressure, POC
– start prevention
Safety loop/burner flange, combustion pressure, POC – start
prevention
Safety loop/burner flange, extraneous light, combustion
pressure, POC – start prevention
Safety loop/burner flange, air pressure, combustion pressure,
POC – start prevention
Safety loop/burner flange, extraneous light, air pressure,
combustion pressure, POC – start prevention
Gas pressure switch-min / heavy oil direct start
Basic documentation LMV37.4...
29 Error code list (all LMV2 types / LMV3 types)
Recommended measures or causes
Check wiring for line interruption
Check wiring for line interruption
Check wiring to see if there is a line interruption.
POC: Check to see if the valve's closing contact is closed
Check wiring.
Check if the valve closure contact opens when valve is controlled.
Check wiring.

V02.00)
Check if the valve closure contact opens when valve is controlled.
CC1P7546en
17.12.2018