Husqvarna 967187001, Руководство по ремонту

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Description of electrical system
10.6 Description of Cables
The machine's electrical system is split into two
large cables (
Cable 1
and
Cable 2
) and also some
smaller cables.
The two large cables (1 and 2) go through the
articulated unit from the rear of the machine. Cable
1 goes from the front of the machine where it
connects to the cutting deck and the pedal plate.
Cable 2 goes to the control panel with the battery
status indicator and buttons plus key, seat switch
and the two switches for activating the cutting
deck.
Cable 1 connects to the front of the machine
Cable 1 connects to the cutting deck via four con-
nections and two connections go the each motor
control with plus and minus, (connectors with thick
black and red leads). There are also four signal
leads with the signals minus, start, fault and savE
(savE is also a fault signal in version 1) that go to
each motor control, they are connectors with four
thinner leads. These four connections are coupled
via four connectors to the motor control units. It
is possible to interchange the two connectors for
positive and minus with each other and also the
signal connectors with each other without it affect-
ing the function.
Cable 1 is also connected to the pedal plate and
on the pedal plate is the microswitch for forward/
reverse and P-brake plus a potentiometer for
the desired speed. There are two microswitches
mounted on the pedal plate, one to signal forward
to the CCU and on to signal reverse to CCU.
These two switches are controlled manually from
the pedals, which means only one switch can
be affected at one time. Pressing the pedal for
forward will activate the switch for forward directly
and pressing the reverse pedal will activate the
switch for reverse directly. The motor brake will
function automatically when neither switch is ac-
tive.
At the same time as one of the switches is
activated, a potentiometer is also affected that
requests the desired speed of the machine. The
potentiometer is turned manually from the pedal
so that an increasing input signal to CCU is
obtained when the pedal is depressed further. It
is the same potentiometer for forward as well as
reverse. The mechanics are constructed so that
there is a smaller turn of the potentiometer when
reversing. The CCU software also limits reverse
speed in relation to forward. On the pedal plate is
a switch to indicate if the P-brake is active or not.
It is connected so that CCU receives a +5 V signal
as long as the P-brake is not active. When active,
it will be zero volt into the CCU.
Reverse switch
Reverse ON = 5V to CCU
Wire mounting view
Forward switch
Reverse ON = 5V to CCU
P-brake switch
P-brake ON = 0V to CCU
Speed demand
rotary potentiometer
These three switches on the pedal plate are
connected to Cable 1 via a four-pole transition
connector. The cable colors this time are orange,
brown, green and white. The green and white
colors are switched in the transition connector so
that green is coupled to the white from the pedal
plate and white to green from the pedal plate. The
potentiometer is connected directly to Cable 1 with
a connector that is coupled directly to the potenti-
ometer, the color of the leads to the potentiometer
is orange for +5 V, gray for signal to CCU and blue
goes to minus (GND). There is also a function in
the CCU software that enables the calibration of
the forward and reverse signals (see " 7.19 ").