Upright AB38, Service & Parts Manual

Page: 20 / 133

Operation
Section
3-2 AB38 Work Platform
It will be noticed that on the Upper Control Box a set
of buttons are used to alternate functions. Each
function will have it’s corresponding graphic. This
selector switch indicates to the Controller which
function is required and by using the Joystick the
speed of this selected function can be adjusted.
The boom functions on the chassis controls provide
proportional control for each function by way of an
analog rocker switch, the desired function can be
activated by depressing one of four buttons on the
controls and then holding the “enable” button and
operating the analog rocker.
The use of these functions is further explained
throughout this Section.
DESIGN FEATURES
The AB38 Series Work Platform has the following
features:
•
The drive speed is limited to a ‘creep speed’ when
operating the Work Platform while the machine is
elevated.
•
The energy-efficient motor control units provides
long battery life and smooth proportional control of
the boom and drive functions.
•
All cylinders are fitted with hydraulic hose-burst
protection interlocks.
•
The on-board charger is fully automatic and
charges the batteries efficiently and economically.
•
If the work platform starts to become unstable and
the Tilt Sensor is activated an alarm will sound in
the upper control box. In this situation power is
partially cut to the upper controls to prevent any
boom movements (i.e. UP, TELE OUT) that might
increase instability. An emergency override switch
is fitted to allow the booms to be lowered at a
controlled speed to bring the machine back to a
stable position.
•
In the event of a power loss the two Boom Lift
Cylinders are fitted with emergency lowering
valves which allow the booms to be lowered at a
controlled speed by an operator on the ground.
•
A Master Cylinder/Slave Cylinder levelling system
ensures that the Platform remains level throughout
the entire working cycle of the machine.
•
A manual rotation facility is fitted to allow rotation of
the Elevating Assembly in the event of power loss.
3.0
HOUR METER
The AB38 Series Work Platform is equiped with an
hourmeter as standard.
To access the hour meter function follow the following
steps.
(with the machine powered up)
1. Push the platform emergency stop button.
2. Hold down the following buttons, horn, telescope
and upper boom.
3. While holding the buttons twist the emergency stop
button to return power to the machine.
4. “hr” will now be displayed on the readout, Pressing
the right turn button will scroll through the accumu-
lated hours two digits at a time. For example, if press-
ing the right turn button once displays “20”, pressing it
a 2nd time displays “58”, and pressing it a 3rd time
displays “hr”, the elapsed time of operation is 2058
hours.
LOAD SENCING
The AB38 is fitted with a load sensing system de-
signed to comply with the requirements of :
BS EN 280 : 2001
If a load equivelent to 90% of safe working load is
lifted a fault code “03” will be displayed on the digital
display on the platform control box. If a load which is
greater than the safe working load is present in the
basket all machine functions will cease to operate
and an acoustic warning will sound. In order to return
to normal operation a load equal to or less than the
safe working load must be present in the basket and
the power must be re-cycled, power can be re-cycled
by pushing the emergency stop button and releasing
it again.