Height Rider/SP Series
Operating & Safety Instructions
English/USA – 07/17
Original instructions
22
4
Operation
4.1
CONTROL CIRCUIT COMPONENTS
4.1.1
GROUND CONTROLS
PROGRAMMABLE LOGIC CONTROLLER (PLC): -
Situated under the ground controls canopy, behind
the Ground Controls Station is the PLC. Its purpose is to receive signals from
all
areas of the control,
to process the instructions and machine status, and to safely operate the relevant machine functions.
TILT SENSOR
: - Installed on the superstructure under the links lift cylinder, the tilt sensor is a solid-
state sensor, which monitors the inclination of the machine chassis. When the platform is in use, (i.e.
Booms are raised), if the inclination exceeds the pre-set limit, it will disable all drive functions and
sound the alarm. In order to recover the machine, boom operation is unaffected, allowing the operator
to restore drive by lowering the booms into the stowed position. It is then possible to drive back onto
level ground, fully restoring machine operation.
MULTI-TONE SOUNDER & BEACON
The Niftylift will warn personnel that the machine is about to move when the green power button or
footswitch is pressed. The machine’s default setting is to sound a beeper at the base control location
and flash a beacon mounted on the top of the engine canopy. However, the machine can be
configured to select either the sounder or the beacon if site conditions require the machine to behave
differently. (e.g. Beacon only, when used at night in a residential area). It is mandatory that one alert
device is functioning, and it is not possible to turn off or permitted to disable both the beacon and
sounder.
If a safety-critical situation occurs, the sounder will emit a “ricochet” sound to alert the user and
nearby personnel. This warning occurs even if the motion sounder setting has been disabled.
Cage Weigh:
- If the electronic load cell detects an overload condition, the machine will sound
continuously in conjunction with the cage overload warning light.
Battery management:
- when a low battery state is reached, the "pulsing" of the D.C. motors is
mimicked by the sounder reinforcing the message to the operator to charge the machine. Note; if
the sounder activates whilst using electric power only, it is advisable to start the engine enabling the
operator continued use of the machine, whilst recharging the batteries.
HORN
: - Located on the side of the ground control box is a horn, which is used as a manual alert, by
pushing the "Horn" button on the Platform Control Panel.
BOOM SWITCH: -
Mounted on the links knuckle and operated by the raising of link booms or upper
boom, this switch controls both the operation of the Tilt Sensor, and the speed control function. With
the booms in the stowed position, the Tilt Sensor is by-passed, allowing the machine to negotiate
slopes in excess of the permissible elevated working angle, without isolating the drive function. At the
same time, High Speed drive (Depicted by a Hare Icon) is possible. When the booms are raised the Tilt
Sensor is activated and only Slow Speed drive is permitted. These control functions are of primary
importance to safety of the machine and operator;
under no circumstances should this control
function be isolated or by-passed.
TELESCOPIC BOOM SWITCH: -
Mounted inside the Telescopic Boom, this switch controls the
operation of the Tilt Sensor and Speed Control function as described in the previous paragraph.
Summary of Contents for HR21 4x4
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