Troubleshooting Schedule - Husqvarna DXR300 Operator's Manual

Troubleshooting schedule

WARNING! Most accidents involving machines occur during trouble 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.
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.
Following the trouble shooting guide will provide you with tips to facilitate the trouble shooting process. You can also perform simpler
trouble shooting operations. The operator may only carry out the maintenance and service operations that are described in this
Operator's Manual. More extensive interventions must be carried out by an authorized service workshop.
Always start by checking any error messages on the remote control. Follow the instructions for the respective message in
accordance with the error messages section.
Problem Cause
Emergency stop/machine
stop is pressed.
Too low mains voltage to
the machine.
The electric motor does
A fuse has blown.
not start.
No radio communication
between remote control
and machine.
The machine's fuses have
too low a rating.
Fuses for the mains
connection blow when Electric motor blown.
starting.
The hydraulic pump has
cut out.
Too little hydraulic fluid in
the tank. (Noise emanating
from the pump.)
Circulation valve open.
The motor runs but the
hydraulic functions
have no power or do
not work at all.
Fault in the pump regulator.
Standby pressure set too
low.
The potentiometer that
controls mechanical
movements/tools is
Arm movements and
screwed down.
tool function run slowly.
Standby pressure set too
low.
Internal leakage in the
cylinder.
An individual function is
Restriction in a hydraulic
running slowly.
hose.
Fault in the pilot control
valve.
TROUBLESHOOTING
Possible action
Check that the emergency stop or machine stop button are not pressed by
turning them clockwise.
Check power supply and ensure correct voltage.
Check that the mains voltage is compatible with the machine and that the
correct fuses are used.
Green symbol in the display indicates contact. If the symbol is red, check
that the battery for the remote control is charged and correctly inserted.
Ensure that the correct remote control is being used. Check that the
communication cable and aerial cable on the machine are properly
secured. Test run the machine using cable control.
Check that the mains voltage is compatible with the machine and that the
correct fuses are used.
Contact your service agent.
Contact your service agent.
Stop the motor at once. Investigate and rectify any leaks there might be.
Replenish hydraulic fluid.
Check the diode on the valve cap at the bottom of valve block 1. If the
circulation valve is open the diode does not light up. Check the cable to the
control module.
Extend an unloaded cylinder to its end position and check the pump
pressure in the display. If you get maximum pressure the pump regulator
is OK.
Activate the remote control without operating any functions and check the
settings for stand-by pressure on the display. The pressure should be 20 ±
1 bar.
Unscrew the knob(s).
Activate the remote control without operating any functions and check the
settings for stand-by pressure on the display. The pressure should be 20 ±
1 bar.
Extend an unloaded cylinder to its end position and check the pump
pressure in the display. If you get maximum pressure the pump regulator
is OK.
Run an unloaded cylinder. Check the pump pressure on the display. If you
receive max. pressure but not full speed on the cylinder, this indicates a
strangulation in the hydraulic hose.
Contact your service agent.
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English