Err
or code
Diagnostic code
Meaning for the LMV37.4... system
Remedy
7
#
Loss of flame
0
Loss of flame
3
Loss of flame (softwar
e version
≤
V02.00)
3...255
Loss of flame due to TÜV test (loss-of-flame test)
12
#
V
alve pr
o
ving
0
Fuel valve 1 (V1) leaking
(fuel valve 2 with valve pr
oving via X5-01)
For valve pr
oving via X5-01 (gas pr
essur
e switch-min)
- Check to see if the valve on the burner side is leaking
- Check to see if the pr
essur
e switch for the valve pr
oving is closed when gas
pr
essur
e is pr
esent
- Check wiring to see if ther
e is a short-cir
cuit
1
Fuel valve 2 (V2) leaking
(fuel valve 1 with valve pr
oving via X5-01)
For valve pr
oving via X5-01 (gas pr
essur
e switch-min)
- Check to see if the valve on the gas side is leaking
- Check wiring to see if ther
e is a short-cir
cuit
2
Valve pr
o
ving not possible
Valve pr
oving activated, but pr
essur
e switch-min selected as input function for
X9-04 (check par
ameters 238 and 241)
3
Valve pr
o
ving not possible
Valve pr
oving activated, but no input assigned (check par
ameters 236 and 237)
4
Valve pr
o
ving not possible
Valve pr
oving activated, but 2 inputs assigned (set par
ameter 237 to pr
essur
e
switch-max or POC)
5
Valve pr
o
ving not possible
Valve pr
oving activated, but 2 inputs assigned (check par
ameters 236 and 237)
81
V1 leaking
Check to see if the valve on the gas side is leaking
Check wiring to see if ther
e is an open-cir
cuit
83
V2 leaking
Check to see if the valve on the burner side is leaking
Check to see if the pr
essur
e switch for the leakage test is closed when gas
pr
essur
e is pr
esent
Check wiring for short-cir
cuit
14
#
POC
0
POC open
Check to see if the valve
’s closing contact is closed
1
POC close
Check wiring
Check to see if the valve
’s closing contact opens when valve is contr
olled
64
POC open – pr
evention of startup
Check wiring to see if ther
e is a line interruption.
Check to see if the valve
’s closing contact is closed
19
80
Combustion pr
essur
e, POC – start pr
evention
Check to see if pr
essur
e switch has closed with no combus
tion pr
essur
e pr
esent
Check wiring for short-cir
cuit
Summary of Contents for STG 146i/2
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