815048 Mercury CONNECTOR

engine fault conditions. An example of an engine fault condition is the low engine oil pressure fault. The fault codes also include protective relaying functions. The underfrequency fault is an example of a protective relaying function.AL fault codes rely upon certain setpoints. See System Operation, "Service Mode" for more information on setpoints. AL fault codes are not stored in the fault log of the GSC+. Many of the AL fault codes are programmable as a fault alarm or as a shutdown fault. In order to show the severity of the fault, the AL fault codes are accompanied by a fault alarm indicator. Also, the fault shutdown indicator on the GSC+ can accompany an AL Fault Code. The AL fault codes and the related setpoints are described in the paragraphs that follow.AL1 High Water Temperature Alarm - The GSC+ issues a high water temperature shutdown when the engine coolant temperature signal rises within 6°C (11°F) of setpoint P015. The fault alarm indicator will FLASH. The AL1 fault code is shown on the upper display after the "Alarm Fault Codes" key is pressed.P015 is the setpoint for a high water temperature shutdown. This setpoint sets the coolant level temperature. The GSC+ uses the temperature in order to declare that a high water temperature shutdown fault is present. When the setpoint is reached, the dedicated shutdown indicator for high water temperature FLASHES and the engine is shutdown.AL2 Low Water Temperature Alarm - When the engine coolant temperature decreases to setpoint P16, the GSC+ issues a low water temperature alarm. Setpoint P016 is the setpoint for the low water temperature alarm. The fault alarm indicator will FLASH and the AL2 fault code is shown on the upper display after the "Alarm Codes" key is pressed.P016 is the setpoint for a low water temperature alarm. P016 alerts the GSC+ that a low water temperature alarm fault (AL2) exists.AL3 Low Engine Oil Pressure Alarm - The GSC+ issues a low oil pressure alarm when the engine oil pressure drops within 34 kPa (5 psi) of the P013 setpoint or the P04 setpoint. The fault alarm indicator will FLASH and the "AL3" fault code is shown on the upper display after the "Alarm Codes" key is pressed.P013 is the setpoint for low oil pressure shutdown at engine rated speed. This setpoint alerts the GSC+ when a low oil pressure fault exists at the rated speed of the engine. When the setpoint is reached, the dedicated shutdown indicator for low oil pressure flashes and the engine is shut down.P014 is the setpoint for low oil pressure shutdown at idle speed. Setpoint P014 tells the GSC+ when a low oil pressure shutdown fault exists at idle speed of the engine. When the setpoint is reached, the dedicated shutdown indicator for low oil pressure FLASHES and the engine is shutdown.AL4 Fault Detected By Engine ECM - The AL4 fault occurs when the electronic control module (ECM) for the engine detects an alarm fault or a shutdown fault. The engine ECM tells the GSC+ whether the AL4 fault is an alarm fault or a shutdown fault. This includes faults that derate the engine. The engine ECM is programmed so that the engine will not lower the engine horsepower. The occurrence of an AL4 fault code could mean that the engine ECM is not programmed correctly. Proceed to Troubleshooting Service Module. The AL4 fault (P023) is disabled on MUI engines and gas engines.When the fault is programmed as a shutdown fault, the fault shutdown indicator will FLASH and the "AL4" fault code is immediately shown on the upper display.When the fault is programmed as an alarm fault, the fault alarm indicator will FLASH and the "AL4" fault code is shown on the upper display after the alarm codes key is pressed.AL5 Low Engine Coolant Level Fault - The GSC+ issues a low coolant level warning AL5 when the engine coolant level is below the coolant loss sensor. The GSC+ can be programmed to treat this fault as an alarm, or a shutdown P006. The GSC+ can be programmed to treat this fault as disabled P005. The GSC+ can be programmed to light one of the spare fault indicators when this fault occurs. The spare fault indicators are located on the front of the GSC+. The GSC+ waits for 10 seconds before a low coolant level fault is issued. When the fault is programmed as a shutdown fault, the fault shutdown indicator will FLASH and the "AL5" fault code is immediately shown on the upper display.When the fault is programmed as an alarm fault, the fault alarm indicator will FLASH and the "AL5" fault code is shown on the upper display after the "Alarm Codes" key is pressed.AL6 High Engine Oil Temperature Fault - When the engine's oil temperature increases above the setpoint P026 (oil temperature threshold), the GSC+ issues a high engine oil temperature fault. The GSC+ can be programmed to treat this fault as an alarm (P027), a shutdown, or the fault can be disabled (P025). The GSC+ can be programmed for SP17, SP18, or SP19 to light one of the spare fault indicators on the GSC+ when this fault occurs.When the fault is programmed as a shutdown fault, the fault shutdown indicator will FLASH and the "AL6" fault code is immediately shown on the upper display.When the fault is programmed as an alarm fault, the fault alarm indicator will FLASH and the "AL6" fault is shown on the upper display after the "Alarm Codes" key is pressed.AL7 Generator Overvoltage Fault (protective relaying function) - When the line to line voltage between any two phases of the generator rises above the P102 or the P105 setpoints, the GSC+ issues an overvoltage fault. The GSC+ can be programmed as P101 to enable this fault as an alarm. The GSC+ can be programmed as P104 to enable this fault as shutdown. The fault is programmable with a time delay of 0 to 120 seconds P103, P106. The fault threshold (P102, P103)