Husqvarna DXR-310 manual Machine’s safety features, Maintenance and service, Personal protection

SAFETY INSTRUCTIONS

Maintenance and service

Most accidents involving machines occur during trou- ble shooting, service and maintenance as staff have to locate themselves within the machine’s risk area. Prevent accidents by being alert and by planning and preparing the work. You can also refer to ’Preparations for maintenance and service” in the ’Maintenance and service” section.

•The user must only carry out the maintenance and service work described in this Operator’s Manual. More extensive work must be carried out by an authorized service workshop.

•Never carry out repairs without having the neces- sary expertise.

•Only trained service personnel are permitted to intervene in the electrical or hydraulic systems.

•Use personal protective equipment as well as equipment to mechanically secure machine com- ponents during maintenance and service.

•Set out clear signs to inform persons in the vicinity that maintenance work is in progress.

•If service operations or trouble shooting does not require the machine to be switched on, the power cable must be removed and positioned so that it cannot be connected by mistake.

•Ensure there is no current to the machine by re- moving the power cable before opening or remov- ing the electric cabinet or any other component that contains electrical current.

•Pipe and hose couplings can remain pressurized despite the motor being switched off and the pow- er cable disconnected. It must always be assumed that hydraulic hoses are pressurized and they must be opened with great care. Relieve the pressure on the arm system by resting it on the ground and turn off the electric motor before undoing the hoses.

•Never try to stop hydraulic ßuid leaking from a bro- ken hose by hand. Finely dispersed hydraulic ßuid at high pressure can permeate under the skin and cause very severe injuries.

•When dismantling machine parts, heavy compo- nents can start moving or fall down. Secure moving parts mechanically before loosening screw joints or hydraulic hoses.

•Use an approved lifting device to secure and lift heavy machine parts.

•Several components heat up during work with the machine. Do not commence any servicing or main- tenance tasks until the machine has cooled.

•Keep work area clean and well lit. Cluttered or dark areas invite accidents.

•The machine’s movements can be defective if a terminal, cable or hose is incorrectly assembled. Exercise caution during test runs and be prepared to turn off the machine immediately in the event of a fault.

The machine’s safety features

The machine’s safety features can be divided into safety features for personal protection and those for mechanical protection. Some of the safety features provide both mechanical and personal protection.

WARNING!

Do not modify the machine’s safety devices and check regularly that they are working properly. The machine must not be driven if protective plates, protective covers, safety switches or other protective devices are not Þtted or are defective.

Personal protection

Indication of zero position

If either of the joysticks is in an operative position when the remote control is started, the function will be blocked. The operator is informed of this by means of an error message appearing on the screen. To reset the function, the remote control must be turned off and on again.

The function also protects against faults in the potenti- ometer or cable breaks.

Signal voltage limitation

Signal voltage limitation prevents the machine execut- ing unexpected movements in the event of a cable breaking or a short-circuit.

The voltage level of the control signals is limited to within a maximum and minimum value. If the voltage level falls outside the permitted interval, the machine stops.

Joystick guard

The safety feature reduces the risk of unintentionally moving the machine by locking the control circuit if the joysticks have been in neutral for three seconds.

The control circuit is activated by means of the left button on the right joystick. It is activated when the button is released. This guards against Þxing the but- ton in an active position.

Radio block

If the remote control has been turned off for two minutes the electronic unit in the machine is blocked to radio signals. It is not possible to restart the ma- chine until the supply voltage to the machine has been turned off and on again.

The safety feature ensures that the operator knows which machine will start and that the correct remote control is being used for the machine. This is particu- larly important when there are several machines at the same workplace.

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