Err
or code
Diagnostic code
Meaning for the LMV37.4... system
Remedy
97
#
Err
or r
elay supervision
0
Safety r
elay contacts have welded or e
xternal po
wer supply fed to
safety r
elay
Test the contacts:
1. Unit connected to po
wer: Fan output must be dead.
2.
Disconnect po
wer: Disconnect fan. No r
esistive connection between fan output
and neutr
al conductor allo
wed.
If one of the 2 tests fails, r
elease the unit since contacts have definitively welded
and safety can no longer be ensur
ed.
98
#
Err
or r
elay supervision
2 Safety valve
3 Ignition tr
ansformer
4 Fuel valve 1
5 Fuel valve 2
6 Fuel valve 3
Relay does not pull in
Make a r
eset; if err
or occurs r
epeatedly
, r
eplace the unit
99
#
Internal err
or r
elay contr
ol
Make a r
eset; if err
or occurs r
epeatedly
, r
eplace the unit
3
Internal err
or r
elay contr
ol
Make a r
eset. If err
or occurs r
epeatedly
, r
eplace the unit
Softwar
e version V03.10: If err
or C:99 D:3 occurs during standar
dization of the
VSD
, deactivate tempor
arily function Alarm in case of start pr
evention (par
ameter
210 = 0, when using a r
elease contact) or interrupt the contr
oller-ON signal
100
#
Internal err
or r
elay contr
ol
Make a r
eset; if err
or occurs r
epeatedly
, r
eplace the unit
105
#
Internal err
or contact sampling
0 Pr
essur
e switch min
1
Pr
essur
e switch max /
POC
2
Pr
essur
e switch valve
pr
o
ving
3 Air pr
essur
e
4 Load contr
oller open
5 Load contr
oller on / off
6 Load contr
oller close
7
Safety loop / Burner flange
8 Safety valve
9 Ignition tr
ansformer
10 Fuel valve 1
11 Fuel valve 2
12 Fuel valve 3
13 Reset
Stuck-At failur
e
Can be caused b
y capacitive loads or supply of DC voltage to the mains voltage
inputs. The diagnostic code indicates the input wher
e the pr
oblem occurr
ed
Summary of Contents for STG 146i/2
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