Hardi HC 5500 SPRAY BOX III, Instruction Book

Page: 70 / 84

11 - Fault finding
70
Operational Problems
Operational faults
Mechanical faults
FAULT PROBABLE CAUSE CONTROL/REMEDY
Area is not being measured. Boom width or speed constant have not
been entered. Enter the values in menu [3.3.1 Width] and [3.1 Speed calibration].
Missing speed sensor. Check the sensor using menu [4.5.2 Speed], check the cable to the
sensor for damage. If necessary, replace the sensor.
Check sensor location [3.1 Speed calibration].
The controller clock is not set. Set the clock in menu [2.4 Set clock] to enable the controller registers.
The volume rate (L/ha) is continuously
displayed at “0”. Constant has not been entered. Enter constant in menu [3.2.1 Flow calibration].
Pulses of the flow meter are not reaching
the sprayer control unit. Check wiring. Check the impeller of the flow meter, using menu [4.5.1
Flow] - it may be stuck.
The volume rate display is not correct. The flow meter is not working properly. Test the flowmeter using menu [4.5.1 Flow].
The area is not being registered. Check boom width and adjust if necessary.
Re-calibrate speed [3.1 Speed].
The intended volume rate cannot be
reached.
The volume is below the preset rate.
The pressure motor has been wrongly
poled. The rate is controlled downwards
instead of upwards. Check the control by using the +/- keys in manual mode.
Change the control motor connections if necessary.
The pump cannot deliver the required
amount. Increase PTO speed. Change to a lower gear.
The filters are blocked. Clean the filter.
Wrong flow PPU. Check PPU using menu [3.2 Flow calibration].
The volume rate lies above the preset rate. The pressure motor has been wrongly
poled. The rate is controlled downwards
instead of upwards.
Check the control by using the +/- keys in manual mode.
Change the control motor connections if necessary.
The return flow from the pressure motor to
the tank cannot take superfluous quantity. Check the tube system. Reduce the power of the pump (lower PTO
speed, higher gear).
Volume application rate is not stable, when
only one or two boom sections are open. Flow below minimum frequency of flow
sensor. Set pressure manually when spraying with all sections open.
Install a pressure sensor. Below 5 Hz from the flow sensor will result in
the system switching to pressure based sensing for volume application
rate.
FAULT PROBABLE CAUSE CONTROL/REMEDY
No speed readout. Incorrect speed sensor location chosen. Select the correct sensor on Sprayer, Tractor or Radar in menu [3.1.1,
3.1.2 or 3.1.3].
Defect sensor or cable. Check sensor using menu [4.5.2 Speed].
Error message that fuse is active. Short circuit in system. The Spray box has 3
thermal fuses:
Fuse 1 = Section valves to left side of centre
and centre switch.
Fuse 2 = Section valves to right of centre
switch.
Fuse 3 = Short circuit in options and
pressure regulation.
Turn power OFF and locate problem.
When fuses has cooled down the system can be powered on again.
Error message “Low voltage”. Voltage below 9 Volts. Check battery and connections.
Speed readout not stable. Perforated wheel sensor plate fitted back
the front.
Speed sensor set to close to upper or lower
sides of perforated wheel sensor plate.
Relocate sensor.