Siemens LMV37.4 Series Basic Documentation page 217

Error
Diagnostic code
code
0
3
3...255
12 #
0
1
2
3
4
5
81
83
14 #
0
1
64
19
80
20 #
0
1
21 #
0
1
Building Technologies Division
Industry Sector
Meaning for the LMV37.4... system
Loss of flame

Loss of flame (software version V02.00)
Loss of flame due to TÜV test (loss-of-flame test)
Valve proving
Fuel valve 1 (V1) leaking
(fuel valve 2 with valve proving via X5-01)
Fuel valve 2 (V2) leaking
(fuel valve 1 with valve proving via X5-01)
Valve proving not possible
Valve proving not possible
Valve proving not possible
Valve proving not possible
V1 leaking
V2 leaking
POC
POC open
POC close
POC open – prevention of startup
Combustion pressure, POC – start prevention
Pressure switch-min (Pmin)
No minimum gas /oil pressure
Gas shortage – start prevention
Pressure switch-max (Pmax) / POC
Pressure switch-max (Pmax): Max. gas / oil pressure
exceeded
POC: POC open (software version  V02.00)

POC close (software version V02.00)
Basic documentation LMV37.4...
29 Error code list
Remedy
For valve proving via X5-01 (gas pressure switch-min)
- Check to see if the valve on the burner side is leaking
- Check to see if the pressure switch for the valve proving is closed when gas pressure is present
- Check wiring to see if there is a short-circuit
For valve proving via X5-01 (gas pressure switch-min)
- Check to see if the valve on the gas side is leaking
- Check wiring to see if there is a short-circuit
Valve proving activated, but pressure switch-min selected as input function for X9-04 (check
parameters 238 and 241)
Valve proving activated, but no input assigned (check parameters 236 and 237)
Valve proving activated, but 2 inputs assigned (set parameter 237 to pressure switch-max or POC)
Valve proving activated, but 2 inputs assigned (check parameters 236 and 237)
Check to see if the valve on the gas side is leaking
Check wiring to see if there is an open-circuit
Check to see if the valve on the burner side is leaking
Check to see if the pressure switch for the leakage test is closed when gas pressure is present
Check wiring for short-circuit
Check to see if the valve's closing contact is closed
Check wiring
Check to see if the valve's closing contact opens when valve is controlled
Check wiring to see if there is a line interruption.
Check to see if the valve's closing contact is closed
Check to see if pressure switch has closed with no combustion pressure present
Check wiring for short-circuit
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.
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CC1P7546en
20.09.2013