Ch 6 page 43
ELECTRICAL SYSTEM
SHOP MANUAL
Charge lamp (12)
Lamp state is controlled from Scania canbus message. Scania ECU is monitoring the alternator.
Body tip system (13)
Green float:
Body down (proxy switch contact) and A pressure( body lift) < 7.5bar and engine running.
The float solenoid valve is open to tank in this state.
Amber lock:
Body down (proxy switch closed), and A pressure > 11.5bar and engine running.
Body down (proxy switch closed) and engine stopped.
Amber body up:
Body up (proxy switch open).
Red:
WB2 communication is missing.
Then the body is lifted (proxy switch open) then vehicle speed is limited to 10km/h.
If the WB2 canbus communication or the sensor is failing the vehicle speed is also limited to 10km/h.
An over center safety function is implemented. This function monitors the differential pressure between A and B,
and limits the tip up speed. The function will start limiting the real lift pressure is < 15bar.
Tipping down with load will limit the down speed of the body. This function will start limit at 70bar on A pressure.
Full limit is at 150bar.
If pressure sensor A or B is faulty/missing the tip speed will be limited both up and down.
Accumulator charge is activated during tip up at full speed (550/600mA).
For a soft landing of the body the float is activated during tip down when the proxy switch is closing.
The button on the joystick is used to active engine control during tipping.
The Transmission and gear selector must be in neutral state to activate this function.
The engine speed range is as follows:
Tip up: 450mA=720rpm 620mA=1800rpm
Tip down: 450mA=720rpm 620mA=1300rpm
It is possible to override both the over center and the soft down function by holding the override button on the
panel while using the joystick.
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