Installation
LANDI RENZO S.p.A.
Installation and adjustament manual Lambda Control System/2
16/38
that supplies 12V when the board is turned on (lt.
M Fig. 1 and 2).
6.6 WHITE AND GREEN WIRES
CONNECTION TO THE GAS LEVEL
SENSOR
The LCS/2 Computer operates with different gas
level sensors available on the market according
following instructions (Fig. 8):
LANDI RENZO type Lpg/Cng sensor: connect
the white wire of LCS/2 to the white wire of the gas
level sensor; the green wire remains disconnected,
insulating its end.
A.E.B. type sensor: connect both green and white
wires of LCS/2 to the respective green and white
wires of the gas level sensor.
0-90
ΩΩ
ΩΩ
Ω type sensor: connect both green and white
wires of LCS/2 to the gas level sensor wire.
6.7 YELLOW WIRES DISCONNECTING
THE INJECTORS
The yellow wires of LCS/2 are connected to the
contacts of a normally closed relay. During gas op-
eration, (Fig. 9A) the contacts of the relay open,
thus preventing the injectors from operating; when
the engine is fed with petrol, these contacts re-
main closed.
Set the LCS/2 Computer at the parameter ‘OVER-
LAP TIME’ preferable retard timing (in seconds) of
the contacts open in order to have a suitable fuel
overlapping during change from petrol to gas. The
maximum applicable current as a continuous load
is 6.5 A.
If an electronic emulator is used to disconnect the
injectors (Fig. 9B) and it is necessary to set a fuel
overlapping time, connect one end of the yellow
wires of LCS/2 to ground and the other to the spe-
cial connector on the electronic emulator.
NOTE: in the event of LCS/2 malfunction, the in-
jector switchoff system will be automatically disa-
bled to enable the engine to run on petrol.
6.8 GAS DEVICE FEED BLUE LEAD
The blue lead provides a voltage of +12V during
gas operation. It is used to command the solenoid
valve which controls the flow of gas from the tank
and power any emulators and spark advance con-
trols (part. P Fig 1 e 2).
6.9 LINEAR ELECTRO-MECHANICAL
ACTUATOR CONNECTION
The connector with the RED sheath on the end
must be connected to the linear electromechani-
cal slow-speed actuator (att-min) located on the
reducer (SE81 STEP MOTOR part O Fig 1.;TN1/
B STEP MOTOR part O Fig. 2).
The unmarked connector must be connected to
the linear electromechanical high-speed actuator
(att-Max) installed between the reducer gas outlet
and the mixer (part B Fig. 1 and 2).
6.10 ORANGE LEAD TEMPERATURE
SENSOR CONNECTION
The ORANGE lead must be connected to the tem-
perature sensor (optional component code
203.076.001) which can be installed on the LPG
or CNG reg. STEP MOTOR. When installed, this
component allows programming the SWITCH TEM-
PERATURE function so as to set automatic switch
from petrol to gas only when the reducer has
reached the set temperature.
Installation of the temperature sensor must be
done with the engine off and panel disengaged.
To install (Fig. 10) replace the cap (A), under
the sensitivity register (B), with the temperature
sensor (D) also fitting washer (C).
Connect one of the orange leads of the tem-
perature sensor to the orange lead from the wir-
ing system of the LCS/2 computer and earth the
other lead (part S Fig 1 and 2).
7. OPERATION
The programmable functions of LCS/2 can be set
only by the Programmer Tester V05 or by a per-
sonal computer with Interface Kit V05 and dedi-
cated software.
Also when the LCS/2 is not fed (ex. battery dis-
connected), the memorised functions are stored.
For more details, see the ‘Instruction Manual Pro-
grammer Tester V05’.
IMPORTANT: To program the LCS/2 computer, use
a Programmer Tester updated to version V1; make
sure the page of the “MAIN MENU” of the Pro-
grammer Tester indicates V1.
7.1 DATA DISPLAY
By the Programmer Tester V05 (or personal com-
puter with Interface Kit V05 installed) following data
are displayed:
ACT: indicates (in number of steps) the actual po-
sition of the Linear Electromechanical Actuator
DEF: indicates (in number of steps) the acquired
default position (standard value) of the Linear Elec-
tromechanical Actuator
RPM: indicates (in rpm) the actual number of revo-
lutions of the engine
TPS: indicates (in volt) the position of the throttle
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