MTZ 1220.3 - Page 28

MTZ 1220.1/1220.3 Section D . Operation controls and instruments
D8
1. Total astronomical service hours of the engine.
The counter operates with the engine running.
The indication range is 0 to 99999 service hours of the
engine.
In case of power supply interruption the counter saves the information on total service
hours.
2. Service hours over the set period:
In this mode astronomical service hours of the engine is displayed
over the set period of time passed from the previous setting of the
parameter to zero.
Setting to zero algorithm includes choosing of a specified mode,
pushing and holding for seconds of “Mode” key until the counter readouts are set to “0”.
3. Volume of fuel remaining:
In this mode, the current fuel volume in the tank is displayed in
liters.
This mode is available only when the tractor stands still.
Note – tractors “MTZ-220.1/1220.3” are equipped with two fuel volume sensors:
- there is one frequency fuel volume sensor (FFVS) inside a fuel tank under a cab.
- there is another modified frequency fuel volume sensor (MFFVS) inside a fuel tank on a
frame.
Data on total volume of fuel in the fuel tanks comes from a MFFVS to an indica-
tor.
NOTE. Switching between display modes “Total astronomical service hours of the
engine” and “Volume of fuel remaining“ is shall be carried out by “Mode” key on the
control console (2).
3. Diagnostics of speed sensor operability and connection:
When no signal arrives from the speed
sensors for 10 to 12 seconds, the LCD
screen shows a message of a “0” figure
specifying the location of the faulty sensor
(left or right).
4. Diagnostics of frequency-type fuel volume sensor operability (FFVS):
When no frequency signal arrives from the FFVS for 2 seconds,
the LCD screen of the II shows a “FUEL” message;