6Superabrasive
User Manual Original Language
Lavina® 20GE
7/2020
16
4. OPERATION
4.1 PRELIMINARY CONTROLS
Inspect the working area as explained in the safety instructions. Fill in the water tank for wet use or connect the vacuum extractor
and ensure that the vacuum hose is clear and it will follow the machine easily.
Make sure the bonnet air filter on top of the engine is clean. It should be cleaned hourly.
Check the engine oil level, screw the dipstick in to get reading. Make sure the tank is full (see also “Storage Propane tanks).
TANK and FUEL LINES - Check the tank and fuel lines for any sign of wear and tear, such as cracks or any corrosion. Screw the brass
fuel line fitting onto the tank service-valve (hand tight only). This connection
MUST
be secure because the service valve has a
safety valve inside it, which will only open if the brass fuel-line fitting is
COMPLETELY
seated into the service valve.
4.2 FUEL-MINDER USER MANUAL
The SM40 Fuel-Minder is a high-performance, digital fuel control system featuring closed loop feedback, fuel lock-off capability,
emissions safety warnings with shutdown, and an LCD screen for user interface. The system is highly responsive to changes in engine
load, providing optimum the air-to-fuel ratio regardless of operating conditions.
4.2.1 SYSTEM COMPONENTS
The following parts are included with the system:
Electronics Module
Integrated Wire Harness
Fuel Control Valve
Fuel Control Housing
O2 Sensor
LPG Regulator with lock-off
*Individual items are available as replacement parts if necessary*
4.2.2 OVERVIEW OF FEATURES
A)
CLOSED LOOP FUEL MANAGEMENT SYSTEM
The Fuel-Minder uses closed-loop feedback from the O2 sensor to control the amount of fuel introduced to the engine via the Fuel
Control Valve. This technology continuously monitors engine emissions and is capable of making fuel corrections to compensate for
varying engine loads and conditions.
B)
FAULTY O2 SENSOR DETECTION
If a faulty O2 sensor is detected, the Fuel-Minder will alert the user within 3-5 minutes from a cold-start. A message will be displayed
on the LCD screen to let the user know that the O2 sensor needs to be replaced.
C)
BUILT-IN FUEL LOCKOFF CONTROLLER
The Fuel-Minder also controls the fuel lock off and only allows fuel to pass through if it detects the engine is cranking. Once the
Fuel-Minder is powered off from the equipment key switch, the Fuel-Minder closes the fuel lock off and shuts the engine down
immediately.
D)
EMISSIONS WARNINGS AND SHUTDOWN
If the Fuel-Minder detects engine emissions that are too lean or rich for a period of 5 minutes, it will shut the engine down via the
fuel lock off. The Red LED will blink and the LCD will display a message alerting the user of the issue and will prompt some common
fix suggestions.
