ELECTRICS 2.25 7. Press and hold switch (18). All indicators must illuminate and the audible ! alarm must sound. When the switch (18) is released the display module should return to normal operation. ! NOTE: If the system does not behave as expected there may be a fault or the system could require calibration. Refer to section headed “Calibration”. Error indications from the display module • If none of the indicators are illuminated the display module may not be receiving power. Alternatively an internal protection device may have operated due to a fault in the system. Unplug the power connector(4) for the display module and check the power supply.
If there is power to the module and the fault persists install a new display module. Refer to section headed “Display module - Replace” for the procedure. • If indicator (7) is flashing quickly and indicator (10) and (11) are illuminated, the output from the sensor may be negative. The output from the sensor may be more than 100% of the load range. If so the system requires calibration. Refer to section headed “Calibration”. • If indicators (8), (9), (10), (11), (12) and (13) flash slowly there is a fault in the display module. Replace the display module. Refer to section headed “Display module - Replace” for the procedure.
• If all the indicators are flashing slowly except indicator (7), which is flashing quickly, the sensor may be damaged or disconnected. Check the connection to the sensor. Check the operation of the sensor using a spare sensor. If necessary replace the damaged sensor and calibrate the system. Refer to sections headed “Sensor Test” and “Calibration” for the procedure. • If the audible alarm sounds continuously and the machine is not overloaded the display module is not calibrated correctly. Also if all the indicators are illuminated and the machine is not overloaded the display module is not calibrated correctly. Refer to section headed “Calibration” for the procedure.
Sensor - Test General The sensor is bonded to the centre of the rear axle of the machine. Problems that are associated with the sensor are usually due to a break in the electrical circuit or failure of the adhesive that bonds the sensor to the rear axle.