PART III: MAINTENANCE MANUAL
28
TROUBLESHOOTING
* See Fig. 52a.
Checking the ionization current
To measure the detection signal intensity, fol-
low the scheme in Fig. 51.
If the signal is less than the value indicated,
check the position of the detection electrode,
the electric contacts and, if necessary, replace
the electrode.
Fig. 51
If the power supply to the burner is 230V phase-phase
(without a neutral), with the Landis LGB2... o LMG2... flame
control device, between the terminal 2 on the board and the
earth terminal, an RC Landis RC466890660 filter must be
inserted
Key
C - Capacitor (22nF/250V)
LGB - LMG - Landis flame control device
R - Resistor (1Mohm)
RC466890660 - RC Landis filter
Fig. 52a
B
URNE
R DOE
S
N’
T
STA
R
T
B
URNE
R CONT
INUE
S
PR
E
-PU
R
G
U
E
PH
ASE
B
URNE
R DOE
S
N’
T
S
T
A
R
T
A
ND L
O
CK
S
B
URNE
R DOE
S
N’
T
STAR
T
AN
D
R
EPEA
TS
CY
CL
E
B
URNE
R S
T
A
R
S
A
ND
R
E
PEAT
S C
Y
C
L
E
B
URNE
R L
O
CK
S
DURI
NG O
P
E
R
A
T
IO
N
B
URNE
R S
HUT
S
OF
F
AN
D
R
EPEAT
S C
Y
C
L
E
DURI
NG O
P
E
R
A
T
IO
N
F
L
A
M
E
CONT
ROL
L
E
R
R
EPEAT
S TH
E C
Y
C
L
E
W
IT
H
OUT
GI
V
E
CONS
E
N
T
B
URNE
R
S
T
A
R
T
S
A
ND
LO
C
K
S
LACK OF GAS
●
GAS PRESSURE SWITCH FAULT
●
● ●
●
OPEN THERMOSTATS OR PRESSURE
●
FLAME CONTROLLER FAULT
● ● ●
●
●
PRESSURE SWITCH FAULT OR BAD
●
●
●
●
FUSES INTERVENTION
●
●
GAS PRESSURE SWITCH BAD SETTING
●
● ●
●
IGNITION TRANSFORMER FAULT
●
IGNITION ELECTRODE BAD POSITION
●
PHASE-PHASE ELECTRICAL SUPPLY*
●
GAS VALVE FAULT
● ●
●
DETECTION ELECTRODE BAD
●
●
REVERSED PHASE AND NEUTRAL
●
Flame
controller
Minimum flame
signal
LGB21/22
3 µA
LMG21/22/25
3 µA
FLAME CONTROLLER
Scale µA DC
z
LGB21/22-LMG21/22: terminal 8
z
Summary of Contents for Enterprise LG 120
Page 1: ......
Page 30: ...PART III MAINTENANCE MANUAL 30 Wiring diagram cod 01 319 4 Single stage burners ...
Page 31: ...PART III MAINTENANCE MANUAL 31 Wiring diagram 18 069 Rev 1 High Low flame burners ...
Page 32: ...PART III MAINTENANCE MANUAL 32 Wiring diagram 18 069 Connectors layout on printed circuit ...
Page 41: ...APPENDIX COMPONENTS SPECIFICATIONS 41 ...
Page 42: ...APPENDIX COMPONENTS SPECIFICATIONS 42 ...
