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Resetting functions with DIP switches in There are 8 DIP switches in the control unit under the round black rubber cover. normal operation in accordance with the driving program. For single speed engines, it may also be normal for DIP switches 6, 7 and 8 to be in the OFF position. high coolant temperature can be selected by setting DIP switch 4 to OFF. is obtained for these threshold values. Engine power output reduction (LOP) can then be selected to prevent damage to the engine. Changes to the program may be made by authorised personnel only. Note: The engine should only be used in an emergency when the Power- indication comes on. Reading fault codes Note: If the engine has stopped or lost power but the main indicator lamp is out and neither POWER- nor SHUTDOWN are on, the fault is outside the control unit's detection area. Probable causes: fuel starvation, temporary overload, mechanical fault. - Activate the lamp test/fault code switch. In Scania's electrical equipment the main indicator lamp is located in this switch in the main supply box. - All LEDs will then come on for 2 seconds to indicate that they are intact and in working order. This also applies to the main indicator lamp in the main supply box and on the instrument panel .
Make a note of any LED that is defective. - All LEDs will then go out for approximately 4 seconds. - Following this, a fault code will be indicated on one of the LEDs for 2 seconds. Note which LED it is. - The control unit will then automatically return to operating mode. - After having made a note of the fault code, reset the lamp test/fault code switch and reset the control unit by turning off its power supply momentarily. - The most probable cause of the fault can then be found in the troubleshooting schedule on the next page. - When the fault or faults have been rectified the engine can be restarted. - If the control system still gives an indication on the main indicator lamp, other faults may be registered. The fault codes must then read again as above since the system can only show one fault code at a time. - The fault or faults will be logged in a special memory in the control unit where the operating time concerned is recorded. Stored faults can be accessed and erased by authorised service personnel. |