During the time the cause of fault is diagnosed, the control outputs are
deactivated.
z
Burner remains shut down
z
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
LMO24 - LMO44
Control sequence
LMO14
LMO24 - LMO44
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
LED 3-colour signal lamps
M
Burner motor
OW
Release contact of oil pre-heater
t1
Pre-purge time
t3
Pre-ignition time
t3n
Post-ignition time
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-
heater
Controller output signals
Required input signals
OH
Oil pre-heater
QRB Photoresistive detector
QRC Blue-flame detector
bl = blue
br = brown
sw = black
R
Control thermostat or pressurestat
SB
Safety limit thermostat
Si
External primary fuse
W
Limit thermostat or pressure switch
Z
Ignition transformer
t4
Interval from flame signal to release «BV2»
TSA Ignition safety time
tw
Waiting time for oil pre-heating
B
Time of flame establishment
C
Operating position
D
Controlled shut-down by «R»
µC1
Microcontroller 1
µC2
Microcontroller 2
1
2
6
7
4
5
10
11
12
W
SB
R
L
N
M
Z
BV1
AL
Si
8
3
OW
OH
N
8
3
QRB
QRC
br
bl
sw
1
7130a01e/0700
9
EK2
EK1
µC control
K1
K2
K3
FSV
µC2
LED
kbr
µC1
1
2
6
7
4
5
10
11
12
W
SB
R
L
N
M
Z
BV1
AL
Si
8
3
O W
O H
N
8
3
Q R B
Q R C
br
bl
sw
1
7130a02e/0700
9
EK2
EK1
µC control
K1
K2
K3
K4
BV2
LED
kbr
FSV
µC 2
µC 1
R
W
SB
OH
OW
M
Z
BV1
FS
A´
A
B
C
D
1
8
3
3
6
4
11
12
t1
t3
t3n
TSA
tw
Z
FS
6
11
12
7130d02e/0700
Only with LMO14.113A2: re-ignition
t3n
t3n
R
W
SB
O H
O W
M
Z
BV2
FS
A ´
A
B
C
D
1
8
3
3
6
5
11
12
t1
t3
t3n
TSA
tw
Z
FS
6
11
12
7130d03e/0700
t3n
t3n
BV1
4
