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Fault status signal «AL» at terminal 10 is activated
The diagnosis of the cause of fault is quit and the burner switched on
again by resetting the burner control.
Press lock-out reset button for about 1 second (< 3 seconds).
Connection diagram and internal diagram
LMO14
μC control
EK1
μC1
LED
K1
K2
K3
2
8
3
1
10
kbr
SB
8
3
R
OW
W
OH
AL
N
Si
L
N
7130a01e/0700
LMO24 - LMO44
µC cont r ol
EK1
µC 1
LED
K2
K1
K3
2
10
8
3
1
kbr
SB
8
3
R
O W
W
O H
AL
N
Si
L
N
7130a02e/ 0700
Control sequence
LMO14
A´
A
R
W
SB
tw
OH
OW
M
BV1
t1
Z
t3
FS
Only with LMO14.113A2: re-ignition
Z
FS
7130d02e/0700
26
μC2
4
5
6
7
9
11
EK2
1
bl
M
Z
BV1
µC 2
K4
6
4
5
9
7
EK2
BV2
1
M
Z
BV1
B
C
t3n
TSA
t3n
t3n
APPENDIX: COMPONENTS CHARACTERISTICS
LMO24 - LMO44
A ´
R
W
SB
O H
O W
M
BV1
BV2
FSV
Z
FS
12
Z
QRB
FS
QRC
sw
br
Key
AL
Alarm device
kbr... Cable link (required only when no oil pre-heater is used)
BV... Fuel valve
EK1 Lock-out reset button
EK2 Remote lock-out reset button
FS
Flame signal
FSV Flame signal amplifier
K...
Contacts of control relay
FSV
LED 3-colour signal lamps
M
Burner motor
OW
Release contact of oil pre-heater
11
12
t1
Pre-purge time
t3
Pre-ignition time
t3n
Post-ignition time
Q R B
A´
Beginning of start-up sequence with burners using an oil pre-
heater
A
Beginning of start-up sequence with burners using no oil pre-
Q R C
heater
bl
sw
Controller output signals
br
Required input signals
OH
Oil pre-heater
QRB Photoresistive detector
QRC Blue-flame detector
bl = blue
br = brown
D
sw = black
1
R
Control thermostat or pressurestat
8
SB
Safety limit thermostat
Si
External primary fuse
3
W
Limit thermostat or pressure switch
3
Z
Ignition transformer
t4
Interval from flame signal to release «BV2»
4
TSA Ignition safety time
6
tw
Waiting time for oil pre-heating
B
Time of flame establishment
11
C
Operating position
12
D
Controlled shut-down by «R»
µC1 Microcontroller 1
6
µC2 Microcontroller 2
11
12
A
B
t w
t 3n
t 1
TSA
t 3
t 3n
t 3n
7130d03e/ 0700
C
D
1
8
3
3
4
5
6
11
12
6
11
12
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