Assessments - 4, GPA: 4.3
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Once the Cooling timer expires the Fuel Solenoid is de- energized, bringing the generator to a stop. Should the mains supply fail, or Remote Start signal be re-activated during the cooling down period, the set will return on load. 7.2. Manual Operation To initiate a start se-quence in MANUAL, press the pushbutton. When the controller is in the manual mode (indicated by an LED indicator beside the button), pressing the START (I) button will initiate the start sequence. If the pre-heat output option is selected this timer is then initiated, and the auxiliary output selected is energized. After the above delay the Fuel Solenoid is energized, then the Starter Motor is engaged. The engine is cranked for a pre-set time period. If the engine fails to fire during this cranking attempt then the starter motor is disengaged for the pre-set rest period. Should this sequence continue be- yond the set number of attempts (fixed at 3), the start sequence will be terminated and Fail to Start fault will be displayed accompanied by a flashing shutdown indicator. Fail to start Shut Down When the engine fires, the starter motor is disengaged and locked out at a pre-set frequency from the Alternator out- put. Alternatively a Magnetic Pickup mounted on the fly- wheel housing can be used for speed detection (This is selected using the front panel editor or PC). After the starter motor has disengaged, the Safety On timer is activated, allowing Oil Pressure, High Engine Temperature, Under- speed, Charge Fail and any delayed Auxiliary fault inputs to stabilize without triggering the fault. Once the engine is running, the Warm Up timer, if selected is initiated, allowing the engine to stabilize before it can be loaded. The generator will run off load, unless the mains supply fails, or a Remote Start signal is applied. The generator will continue to run On load regardless of the state of the mains supply and/or remote start input until the Auto mode is selected, the Stop button is pressed, or an electrical trip or shutdown alarm is detected. Selecting STOP (O) de- energizes the FUEL SOLENOID, bringing the generator to a stop. 7.3. Protections The module will indicate that an alarm has occurred in sev- eral ways: . The .Common alarm. LED will illuminate (Warning = Red steady, Shutdown = Red Flashing) . If appropriate, the LCD display or LED indicators will display the appropriate alarm icon i.e. for battery charging failure. If no alarms are present the LCD will extinguish any alarm icons. In the event of a warning alarm the LCD will display the appropriate icon. If a shutdown then occurs the module will display the appropriate icon. The original warning alarm icon will remain displayed. Charge alternator warning (all symbols steady) Charge alternator warning indicator still present, com- mon alarm indicator has changed to a shutdown sym- bol and is now flashing. Also present is the flashing over- speed LED. Overspeed and Shutdown alarm Icons are displayed flash- ing. The original warning will remain displayed as long as the triggering conditions remain. Any subsequent warnings or shutdowns that occur will be displayed steady, therefore only the first-up shutdown will appear flashing. Warnings Warnings are non-critical alarm conditions and do not affect the operation of the generator system, they serve to draw the operators attention to an undesirable condition. In the event of a warning alarm the LCD will display: Page 18 BATTERY CHARGE FAILURE If the module does not detect a voltage from the warning light terminal on the auxiliary charge alternator the icon will illuminate. FAIL TO STOP If the module detects the engine is still running when the Fail to stop timer‘ expires, then the module will display: AUXILIARY INPUTS If an auxiliary input has been configured as a warning the appropriate LCD segment will be displayed. SHUTDOWNS Shutdowns are latching and stop the Generator. The alarm must be cleared, and the fault removed to reset the mod- ule. In the event of a shutdown alarm the LCD will display: FAIL TO START, if the engine does not fire after the pre-set number of attempts has been made a shutdown will be initiated. The icon will illuminate. EMERGENCY STOP Removal of the Positive DC Supply from the Emergency Stop input initiates the following sequence, firstly it will initi- ate a controlled shutdown of the Generator and prevent any attempt to restart the Generator until the Emergency Stop push-button has been reset. Secondly it removes the Posi- tive DC supply from both the Fuel Solenoid and Starter Sole- noid. The icon will illuminate. LOW OIL PRESSURE If the module detects that the engine oil pressure has fallen below the low oil pressure trip setting level after the Safety On timer has expired, a shutdown will occur. The icon will illuminate. HIGH ENGINE TEMPERATURE If the module detects that the engine coolant temperature has exceeded the high engine temperature trip setting level after the Safety On timer has expired, a shu...
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