Husqvarna DXR-310 - Manual (Page 14)

SAFETY INSTRUCTIONS
Identity code
The remote control and the machine are connected
by means of a pre-programmed ID code. The ID code
ensures that the right remote control is used for the
right machine.
If several machines are used at the same workplace
there is a risk of mixing up the remote controls.
Switch on the current to the remote control and the
machine. Press the horn to see which machine is con-
nected to the remote control. The machine will beep
and fl ash three times. Do not activate the remote con-
trol before you have ensured that the correct machine
is being operated.
When steering the machine using cables, the ID code
is suppressed and the same remote control can be
used for different machines if these have the same
control system version.
Automatic frequency hopping
In the event of interference in the communication, the
frequency changes automatically to guarantee interfer-
ence-free transmission.
Emergency stop/machine stop
When the machine stop on the remote control is
pressed, the power to the circuits controlling the
communication with the machine is interrupted. The
machine engine stops due to the interruption of the
transfer of signals to the machine’s electronic device.
The emergency stop on the machine switches off the
main power to the machine.
Protective earth
The machine and its components are connected to
grounding conductors in the power cable. If there is a
fault, a fuse is tripped and the current is disconnected.
The machine must be connected to a power point with
a protective earth. If there are no grounding conduc-
tors, or if they are connected incorrectly, have come
off or are loose in a terminal, the current will remain
connected and touching the machine can be highly
dangerous.
If there is reason to believe that the protective earth
has been damaged, the machine must be turned off
and the power cable removed until such time as the
protective earth has been restored.
Always connect the machine through an earth-fault
breaker with personal protection, i.e. an earth fault
circuit breaker that trips at an earth fault of 30 mA.
Hydraulic brake
Hydraulic motors are used when moving the machine.
All hydraulic motors are fi tted with brakes. These
hydraulic motors contain counter balance valves that
prevent uncontrolled fl ow through the motor, e.g. when
manoeuvring down a slope or when the machine is
parked. The counter balance valve closes the tank
opening when the d
rive motors are not being operated.
Mechanical brake
The machine’s d rive motors are equipped with a me-
chanical parking brake. The machine is braked until its
drive function is activated.
Mechanical protection
Automatic phase rotation relay
The automatic phase rotation relay prevents the elec-
tric motor starting with the wrong rotation direction
thus causing mechanical damage.
Motor protection
To prevent overloading, the motor is equipped with
bimetallic relays in the motor linings that disconnect
the power if the motor gets too hot.
If the motor is too hot it is not possible to operate the
tools. The rest of the machine’s functions can be run
at half speed in order to facilitate evacuation of the
machine from risky environments.
Once the motor’s temperature has fallen to a normal
working temperature all functions can be used again.
The machine’s softstarter is fi tted with a motor cut-out
that trips if the current is too high for too long a period.
The machine’s functions return to normal position after
three minutes.
Fuses
Fuses are used to protect the following components
as well as to prevent fi re in conjunction with faults or if
electrical components are overloaded.
Pressure relief valves
The machine’s hydraulic system is equipped with
pressure relief valves. They protect the hydraulic
system against too high pressure and the mechanical
components against overloading.
Pump-around valve
The pump-around valve drains the hydraulic fl ow into
a tank and relieves the pressure on the hydraulic sys-
tem. No pressure enters the cylinders and it prevents
the risk of unforeseen movements. This happens, for
example, after three seconds of inactivity.
14
- English