nifty Heightrider HR21 Operating/Safety Instructions Manual page 25

4.1.7
BOOM-SWITCHES: - Mounted on the tele-knuckle and links knuckle, and operated by any of the
booms raising and/or the telescopic boom extending, these switches control both the operation of the
Tilt Alarm Sensor, and the speed control function. With the booms in the stowed position, the Tilt
Alarm Sensor is by-passed, allowing the machine to negotiate slopes in excess of the permissible
working angle, without isolating the drive function. At the same time, High drive (Depicted by a Hare
Icon) is possible, as is fast throttle on those machines so equipped. When the booms are raised or the
telescope is out, the Tilt Alarm Sensor becomes activated, only slow speed operation is possible and
only Low drive (Depicted by a Tortoise Icon) is permitted. When the booms are raised and the
telescope out is engaged, the machine goes to a third slower speed. 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.
4.1.8
BATTERY MANAGEMENT: - Battery condition is permanently monitored by the control circuit, such
that when available power has decreased to 20% of full charge, the battery status circuit begins to
"chop" the power to the hydraulic motors. This function causes the drive system to stop & start
alternately, signalling to the operator that re-charging is necessary. At the same time the sounder will
begin to sound intermittently and the low battery warning light will illuminate, reinforcing the charge
warning. At this point, sufficient power remains to drive to the nearest power point. Should the operator
ignore the on-set of the discharge warning, the "chopping" will continue until the machine is rendered
inoperative. Immediate charging will then be required.
Note; During normal machine usage with the engine running, the batteries are on continuous recharge
which is indicated by a flashing light (refer to Section 4.2.1). The exception to this is when the control
system decides that additional electric power is required in order to maintain drive/function speed. If
the operator is using electric power only and a low battery warning has activated, it is advisable to start
the engine, enabling continued use of the machine, whilst at the same time recharging the batteries.
Under no circumstances should a machine be left fully discharged or severe battery damage can occur
in a relatively short time.
4.1.9
BATTERY ISOLATOR: - A battery disconnect plug is located beneath the base control canopy, which
allows the machine control and power circuits to be isolated from the batteries themselves. Under
normal operation, the machine Key switch should be used to isolate the machine, with the Battery plug
only being required for emergencies to disconnect the batteries in the event of a short circuit, or during
servicing of the machine to ensure that the power is disconnected.
On electric and bi-energy machines, the battery charging circuit is connected directly to the battery
side, so charging is un-affected by use of this switch. The main battery pack is grounded to the
chassis.
4.1.10
DUTY SELECTOR: - On multiple power option machines, the machine will default to electric power
unless the diesel engine has been started.
English/USA – 11/09
Original Instructions
Operating & Safety Instructions
HR Series
23