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Sheet C058CORRECTIVE MAINTENANCE SHEETCHANGING THE U1 ELECTRONIC MODULEFolio 1/111 - Preliminary operations• Put the machine in the maintenance configuration (see correspondingparagraph).• Switch off electric power (see corresponding paragraph).• Disconnect the « - » then « + » terminals of the starter battery to isolatethe electric circuit.2 - Removing the U1 electronic module• Open the turntable electric box.• Remove the fixing flange (2) from the U1 electronic module.• Remove the U1 electronic module.2Caution!Computers are notinterchangeable, they have aserial number correspondingto a given machine. If this ruleis ignored, dangerousmalfunctions may occur.3 - Installing the U1 electronic module• Install a new U1 electronic module, previously programmed by the manufacturer.• Install the fixing flange.• Close the electric box.• Reconnect the « + » then « - » terminals of the starter battery.• Put the machine back into the operational configuration.• Check that the U1 electronic module works perfectly using the check listfor the machine concerned.4 - Testing the U1 electronic module• Make all movements from the bottom control panel for two seconds.• Make all movements from the top control panel for two seconds.• Lift the jib (> 0°)• Make a travel movement with the selector on high speed and check thatmovement speed is actually micro-speed.• Lower the jib.• Lift the arm to 3 metres.• Make a travel movement with the selector on high speed and check thatmovement speed is actually micro-speed.• Lower the arm.• Lift the boom.• Make a travel movement with the selector on high speed and check thatmovement speed is actually micro-speed.• Lower the boom.