KME NEVO-SKY User manual

USER MANUAL
OF A CAR WITH GAS INJECTION SYSTEM
DIEGO
wer. 02.12.2022
autogas systems
www.kme.eu
LPG/CNG

THANK YOU!
Thank you for choosing our product. The highest quality system has been installed in your car. Its reliable use requires
compliance with the rules which we briey outline in this study.
autogas systems
www.kme.eu
LPG/CNG

PRACTICAL ADVICES
· lling the tank must be carried out on autogas stations
· lling the tank is signalized by characteristic sound of the operating system which protects the
tank from its excessive lling
FILLING THE TANK
We control the LPG installation using one of the available control panels: DG8 Compact, DG7 RGB, DG5, DG4
[for NEVO-SKY and NEVO family systems] or DIEGO G3 [for DIEGO family systems].
The panel is used for communication between the
controller (NEVO-SKY, NEVO or DIEGO G3) and the
gas computer, performing the following tasks:
1. FUEL TYPE SELECTION – pressing button [B]
causes the transition from one fuel to another
(petrol - gas - petrol)
2. WORKING STATE INDICATION [C]
3. GAS LEVEL INDICATION [A]
3
CONTROL PANEL
LED indicator of actual gas level
in the tank
switch for fuel type selection
status LEDs (working state indication)
light level sensor
backlight LED
A
B
C
D
E
LPG/CNG
OPERATION OF THE CONTROL PANEL
ELECTRONICS: NEVOSKY / NEVO / DIEGO
D
C
B
DG5
A
B
C
D
DG4
A
B
C
A
DIEGO DG3
D
C
B
E
A
DG7
RGB
A C
D B
DG8
COMPACT

GAS VOLUME
IN THE TANK NUMBER AND COLORS OF ILLUMINATING LEDS ONTHE CONTROL PANEL [A]
5/5
4/5
3/5
2/5
1/5
Gas level indication can be read on tank indicator or inside the car on control panel.
Number of illuminated LEDs of gas level display [A] indicates the degree of lling the gas tank
[according to the table below]. There is only one LED on the DG8 panel which indicates the ll level
of the tank by changing the color.
INDICATION OF THE CURRENT LEVEL OF GAS FUEL IN THE TANK
A
DG5
A
DG4 DIEGO DG3
A
A
DG7
RGB
Depending on the ambient light controller automatically adjusts the brightness of the panel
(congurable option in the program). The sensor is available in panels: DG8 Compact, DG7 RGB,
DG5 and DG4.
LIGHT LEVEL SENSOR
Gas depletion is signalled by switching on petrol (with signalling) or signicant drop of power while
driving. This is a clear signal that the system must be switched to petrol.
Avoid driving on petrol reserve. Never empty the tank completely.
WARNING!
SYMPTOMS OF GAS DEPLETION IN THE TANK
OR
falshing
* for the factory setting
*
*
*
*
*
DG8
COMPACT
A
4
LPG/CNG
Vehicle equipped with NEVO-SKY / NEVO / DIEGO system normally starts on gasoline. Switching to
gas fuel supply occurs automatically after obtaining the relevant parameters, selected during the
calibration of the system, such as:
· coolant / reducer temperature
· engine speed (RPM) for switching
· he delay time of switching petrol/gas
STARTING THE ENGINE

WORK ON PETROL
5
WORK ON GAS
WAITING
WORK ON PETROL WITH AUTOMATIC RETURN TO GAS
LED is shining, showing gas level, depending on the degree
of lling the gas tank [see table - page 4]
LED is ashing, optionally signaling the temperature to be switched or the gas level in the tank
LED is not shining
LPG/CNG
CONTROL PANEL
DG8
COMPACT

OR
OR
WORK ON GAS
WAITING
WORK ON PETROL WITH AUTOMATIC RETURN TO GAS
OR
WORK ON PETROL
one status LED is shining * and backlight LED is shining or not * and gas level LEDs are on,
depending on the degree of lling the gas tank [see table - page 4]
one status LED is ashing * and backlight LED is shining or not * and optionally gas level LEDs are ashing,
signaling the temperature to be switched — from 1 to 5 diodes LED [1 - low temperature,
5 - achieved switching temperature] — or the gas level in the tank
6
backlight LED is shining or not *
DG7
RGB
CONTROL PANEL
LPG/CNG
* colors and way of signaling are congurable from the program level

OR
WORK ON GAS
WORK ON PETROL
one status LED is shining * and gas level LEDs are on,
depending on the degree of lling the gas tank [see table - page 4]
one status LED is ashing and gas level LEDs are ashing, optionally signaling the temperature to be
switched — from 1 to 5 diodes LED [1 - low temperature, 5 - achieved switching temperature] — or the
gas level in the tank
gas system is completely shut down, the panel is completely blank - NO LED IS FLASHING
OR
DG5
CONTROL PANEL
* colors and way of signaling are congurable from the program level
7
LPG/CNG
WAITING
WORK ON PETROL WITH AUTOMATIC RETURN TO GAS

OR
LPG/CNG
WORK ON GAS
one status LED is shining * and gas level LEDs are on,
depending on the degree of lling the gas tank [see table - page 4]
one status LED is ashing and ashing gas level LED indicator, indicates reducer heating progress
- from 1 to 4 diodes LEDs [1 - low temperature, 4 - achieved switching temperature]
OR
DG4
CONTROL PANEL
8
WORK ON PETROL
gas system is completely shut down, the panel is completely blank - NO LED IS FLASHING
* colors and way of signaling are congurable from the program level
WAITING
WORK ON PETROL WITH AUTOMATIC RETURN TO GAS

AUTOMATIC CALIBRATION OF GAS LEVEL INDICATOR *
This process allows to automatically congure the full range of gas level indication on the control
panel. It is necessary to select the proper type of gas level indicator before calibration. Automatic
calibration should be performed during refuelling of empty gas tank. The whole procedure is as
follows:
* only controlers from NEVO-SKY and NEVO family from version 4.0D
** controlers from NEVO family to version 4.0H
It is possible to exit from the automatic calibration gas level indicator by
pushing the button again (the LED on the panel will go o and the
system goes on petrol).
WARNING!
If panel indicates wrong fuel level after calibration it could mean that it
was made improperly – repeat the process before next refueling.
WARNING!
1. Turn the ignition on (the autogas tank must be
empty).
2. Switch system to petrol (no LED is lit on the panel).
3. Turn the ignition o.
4. Turn the ignition on (the engine must be o).
5. Press the button on the control panel and hold for
approx. 20 seconds (or 15 seconds**). After approx. 10
seconds gas ECU switches valves and indicates working
on gas (longer sound tone).
6. After another approx. 10 (or 5**) seconds after the
gas valve opening (with the button still pressed) the
panel will start signaling the calibration mode of the
gas level indicator - gas level diodes blinking alterna-
tely (as shown in the pictures on the left).
7. Wait approx. 5 seconds until a stable, minimum gas
level is noted (tank empty).
8. Switch o the ignition.
9. Fill up the tank completely.
10. Switch on the ignition.
11. Wait approx. 5 seconds until the panel stops signa-
ling the indicator calibration mode.
12. Calibration complete.
9
LPG/CNG
DG5
DG4
DG8
COMPACT
DG7
RGB
DG5
DG4
DG8
COMPACT
DG7
RGB
GAS LEVEL LEDS FLASH ALTERNATELY

The Diego G3 / NEVO / NEVO-SKY sequential gas injection system has a self-monitoring function
that allows you to detect malfunctions in the gas installation. All errors are remembered in the
controller and the most important ones can be signaled on the control panel. Errors are signaled
by alternating ashing of the status LEDs (in DG8 the indicator LED changes color) together with
an acoustic signal. In the NEVO / NEVO-SKY system, errors are additionally displayed on the gas
level indicator diodes in the tank (if this option is activated in the software). The most common
cause of the error signaling is the lack of gas in the tank. Canceling this alarm requires pressing the
mode change button or it will be silenced automatically after about 5 seconds (default setting).
If after refueling with gas, the gas system does not switch to gas, contact a workshop to diagnose
the system.
GAS SYSTEM SIGNALING
ACOUSTIC SIGNALIZATION
In addition to the light signals which are displayed on the control panel, the gas system also indica-
tes individual events using acoustic signals:
· Each press of fuel changing button is indicated by a sound signal.
· In case of running out of gas in tank or gas pressure decrease, the system will automatically return
from the gas supply to petrol and the driver will hear a ”beep” sound – turned o by pressing the
button on the panel once (system remains in standby mode – alternately ashing two LEDs – blue
and red). In that state, after refuelling the car on gas station, the system automatically switches to
gas supply. Another push of the button on the panel will permanently switch from gas supply to
gasoline – in this state each engine start generates three ”beep” sounds to remind that the system
remained in operational mode on gasoline (it is possible to disable this feature using the software
for gas ECU) and the system will not automatically switch to gas.
· Control panel may also indicate the fact that the car has reached the distance from the last
inspection (congurable from the program) and another visit in the workshop is required. This
information is generated immediately after switching system to gas (once for each engine start) in
the form of the 10 short sounds at intervals of 0.5 seconds.
LPG/CNG
The gas controller enters the sleep mode when the ignition signal disappears and the controller is
connected to the PC software or when some functions require operation after the engine is turned
o, e.g. the EPP emulator. The state of sleep is signaled by the panel by lighting of the respective
LEDs indicating the gas level. In the case of the DG8 panel, this mode is signaled by alternating
white and blue colors. The illustrations below show what the panel looks like in this mode.
GAS CONTROLLER SLEEP MODE ONLY NEVOSKY
The start of the rmware update is signaled by a single, short beep. The status of the gas controller
software update is indicated by the panel by turning on 4 gas level LEDs in turn, while in the DG8
panel the LED's color changes in the following order: red -> orange -> yellow -> green. When the
fourth LED is on or the color is green (for DG8 panel), the cycle will start all over again. After the
update is completed, the gas level diodes will turn o.
GAS CONTROLLER SOFTWARE UPDATE MODE
10
DG5 DG4
DG8
COMPACT
DG7
RGB

CODEDESCRIPTION
E001 - E008
E009 - E016
E017
E018
E019
E020
E021
E022
E023
E024
E025
E026
Gas injectors merged
(lack of possibility of gas mixture correction).
Gas injector malfunction cyl 1..8
Petrol injector no signal cyl 1..8
Reducer temperature sensor short
Petrol injectors merged
(lack of information about mixture).
Inecient reducer heating circle
(reducer too cold <15 °C)
Empty gas tank (low gas pressure)
Gas valves - circle open
Gas valves – circle short
Gas temperature sensor open
Gas temperature sensor short
Reducer temperature sensor open
DG4
DG5
DG7
RGB
11
LPG/CNG
DG8
COMPACT
DG7
RGB DG5 DG4
ERRORS FLASHING CODES NEVOSKY / NEVO only]
For DG8 Compact control panel, all errors are signaled with alternating blue and red color
changes.
NEVO error codes list (code, description, ashing code):
ADDITIONAL CONTROL PANEL MESSAGES
NEVOSKY / NEVO ONLY
While waiting for the switching, the gas level diodes can display the time to switch to gas or the gas
level in the tank (only for the NEVO-SKY family). A selection of these functions is available in the
software. It is not possible to select two functions at the same time.
In order to display the time until switching to gas, the diodes that light up in sequence inform
about the warm-up status of the engine (reducer). All ashing level diodes mean that the car has
reached the switching temperature. In the case of the DG8 panel, reaching the switching tempera-
ture is signaled by white ashing of the diode.
To display the gas level in the tank, the LEDs will blink and show the current fuel level in the gas
tank (as described in section 2.1).
In the DG8 panel, setting the Flashing color of the status will cause the diode to ash blue.

In case of petrol fuel system failure installed NEVO-SKY / NEVO / DIEGO G3 system allows you to
start the engine directly on the gas.
In order to start the engine on emergency mode you should:
1. Turn the ignition on.
2. Switch system to petrol (panel is completely blank – no diodes light on).
3. Turn the ignition o.
4. Turn the ignition on (the engine cannot work).
5. Press and hold button on the Control panel for about 10 seconds until you hear a long beep
(status LED lights constant light – at this moment the system goes into operation on gas and the
gas ECU open the valves).
6. Release the button on Control panel and immediately start the engine (without reversing the
ignition key in the ignition o position.)
7. WARNING! Too long holding button on the panel will start the automatic gas level indicator
calibration procedure (only NEVO-SKY and NEVO). It is possible to exit from this mode by pressing
the button again (the LED on the panel will go o and the system goes on petrol).
After emergency start (directly on the gas) before you start driving, wait for the temperature of the
engine to raise to about 50 0C to ensure sucient heating of the reducer. Otherwise, the reducer
may freeze, which may damage the gas system components and even the engine.
EMERGENCY START ON GAS
The reducer/environment temperature must be greater than 0 0C,
otherwise due to safety reasons it is impossible to start the vehicle on
gas fuel. Therefore, this feature should be used only in exceptional
circumstances!
Frequent use of this mode more than 50 times will block the possibili-
ty of an emergency engine start directly on the gas fuel. It will also
determine the need the workshop in order to unlock the ECU
function.
NOTE!
Emergency start on gas may be disabled when 12V“after the ignition”
signal disappears during the procedure.
NOTE!
During emergency starting on the gas cannot operate some functions
of the controller (e.g. switching mechanisms).
NOTE!
Function is not supported for NEVO-SKY DIRECT.
NOTE!
12
LPG/CNG