420010268002 Blu 700.1 P Low Nox
EN
Connection diagram and control sequence of LME21...
K1
K2/1
R / W
T
GP
AL
STB
H
Si
N
AGK25... PTC resistor
AL
Error message (alarm)
V...
Fuel valve
CPI
Closed Position Indicator
DBR...
Wire link
EK
Lockout reset button (internal)
EK2
Remote lockout reset button
ION
Ionization probe
FS
Flame signal
FSV
Flame signal amplifier
GP
Pressure switch
H
Main switch
HS
Auxiliary contactor, relay
K1...4
Internal relays
KL
Low-fire
LK
Air damper
LKP
Air damper position
Status
Waiting time «tw», other waiting states
Ignition phase, ignition controlled
Operation, flame o.k.
Operation, flame not o.k.
Extraneous light on burner startup
Undervoltage
Fault, alarm
Error code output (refer to «Error code
table»)
Interface diagnostics
Legend: ....... Steady on
Red blink code of
signal lamp (LED))
2 blinks
3 blinks
4 blinks
5 blinks
6 blinks
7 blinks
8 blinks
9 blinks
10 blinks
14 blinks
CONTROL BOXES LME21
RESET
K2/2
K4
K3
LP
Z
V2
M
V1
LP
LR
M
R
SA
STB
Si
t
W
Z
ZV
A
B-B´
C
Color code table for multicolor signal lamp (LED)
Color code
❍ ...................................................................................
● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ● ❍ ● ❍
❑...................................................................................
❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍ ❑ ❍
❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲ ❑ ▲
● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ● ▲ ● ▲
▲...................................................................................
▲ ❍
▲
▲
▲
Red
Error code table
«AL» at
Possible cause
term. 10
on
No establishment of flame at the end of «TSA»
- Faulty or soiled fuel valves - Faulty or soiled flame detector
- Poor adjustment of burner, no fuel - Faulty ignition equipment
on
«LP» faulty
- Loss of air pressure signal after «t10», - «LP» welded in normal position
on
Extraneous light when burner is started up
on
Time out «LP»
- «LP» welded in working position
on
Free
on
Too many losses of flame during operation
(limitation of the number of repetitions)- Faulty or soiled fuel valves.
- Faulty or soiled flame detector - Poor adjustment of burner.
on
Free
on
Free
off
Wiring error or internal error, output contacts, other faults.
on
CPI contact not closed
A
SB / R
W / GP
AL
M
Z
V1
(LR) V2
LP
EK2
FS
tw
t10
7101a22e/0609
Air pressure switch
Load controller
Fan motor
Control thermostat / pressurestat
Actuator
Safety limit thermostat
External pre-fuse
Time
Limit thermostat / pressure
switch
Ignition transformer
Pilot gas valve
Start command (switching on
by «R»)
Interval for establishment of
flame
Operating position of burner
▲ ❍
▲ ❍
▲ ❍
▲ ❍
▲ ❍
▲
▲
▲
▲
▲
▲
▲
❑
❍
Green
Off
10
B
B´
C
t1
t3
t3n
t4
7101d05/0409
TSA
reached
C-D
Burner operation (generation
of heat)
D
Controlled shutdown by «R»
t1
Prepurge time
t3
Preignition time
t3n
Postignition time
t4
Interval between ignition
«Off» and release of «V2»
t10
Specified time for air pressure
signal
t11
Programmed opening time for
actuator «SA»
t12
Programmed closing time for
actuator «SA»
TSA
Ignition safety time
tw
Waiting time
Flashing yellow
Flashing green
Green-red
Yellow-red
▲ ❍
▲ ❍
Flashing red
▲
▲
▲
Red flicker light
●
Yellow
D
Color
Off
Green
Red