815043 Mercury REDUCER ELBOW

Illustration 1 g00398567
GSC+ Display Area With The Service Mode Descriptions Of The Keypad (1) Dedicated shutdown indicators (2) Spare fault indicators (3) Fault shutdown indicator (4) Fault alarm indicator (5) Upper display (6) Lower display (7) KeypadService mode is used for the following purposes.
Assist with troubleshooting of diagnostic faults.
Satisfy special applications.
Satisfy customer needs.
Verify generator set functions.
Calibrate or adjust generator set functions.Service Mode has ten options that can be selected. Service personnel use the options to obtain information about the generator set, and the operator can program functions of the generator set.
Table 1
Service Mode Options    
OP1     Fault log viewing    
OP2-0     Engine/Generator setpoint viewing    
OP2-1     Protective relaying setpoint viewing    
OP2-2     AC factory calibration setpoint viewing    
OP3     Password entry    
OP4     Fault log clearing    
OP5-0     Engine/Generator programming    
OP5-1     Protective relaying programming    
OP6     Spare Input/Output programming    
OP7     Hourmeter programming (1)    
OP8     Voltmeter/Ammeter programming    
OP9     Engine setpoint verification    
OP10     AC offset adjustment    
( 1 ) OP7 is not available for EUI engines.The keypad and the display of the GSC+ are used for activating service mode and selecting the desired option. In service mode, the keys on the keypad have different functions, and the keys on the keypad have different names. The preceding illustration shows the name of each key in service mode. Also, there is a film (label) on the control panel door that identifies each key. The service functions of the keys are listed below.Scroll Right Key - This key is used in viewing information. This key scrolls right through the information. When you are entering the password, this key represents the number 1.Scroll Up Key - This key is used to scroll up information or this key is used to increase the value of information. When you are entering the password this key represents the number 2.Scroll Down Key - This key is used to scroll down through information or this key is used to decrease the value of information. When you are entering the password, this key represents the number 3.Note: Scrolling rapidly through information requires holding down the scroll key.Select Key - To view an option, use the Select key. To change an option, use the "Select" key. To start the scrolling of information, use the "Select" key.Enter Key - This key is used to enter information that has been changed into the GSC+ memory.Exit Key - This key is used to exit service mode. The display now returns to normal mode. The "SERV" indicator on the upper display is NOT SHOWING when the GSC+ is NOT in service mode.Service Mode Key - This key is used to enter service mode. The "SERV" indicator on the upper display FLASHES when the GSC+ is in service mode. The "SERV" indicator on the upper display FLASHES when the keypad performs service mode functions.Procedure To Enter Service Mode
Note: Any active shutdown fault must be made inactive in order to access service mode. A FLASHING shutdown indicator means that a shutdown fault exists. To temporarily change a shutdown fault from an active shutdown fault to an inactive shutdown fault, turn the ECS to the OFF/RESET position. To permanently change a shutdown fault from an active shutdown fault to an inactive shutdown fault, the fault must not be occurring. Also, the ECS must be turned to the OFF/RESET position. If the jumper from terminal 6 to terminal 9 is not installed on the ECS, then the GSC+ will not power up in OFF/RESET and any active shutdown fault must be corrected before entering service mode.Note: Service mode cannot be entered when the engine control switch (ECS) is in the AUTO position.
Press the "SERVICE MODE" key on the keypad of the GSC+. The "SERV" indicator on the upper display FLASHES whenever the GSC+ is in service mode.
The desired option (OP1 through OP10) can now be selected. Each option is described in the topics that follow.
To return to normal mode, press the "EXIT" key a few times until the "SERV" indicator is not showing.Note: To enter service mode options OP4 through OP8, the engine must be shut down. Turn the ECS to the STOP position.Service mode options OP4 through OP10 are password protected. Password protection reduces the possibility of changing information by mistake. The password entry option (OP3) must be entered correctly before access is gained to OP4 through OP10. See System Operation, "Password Entry OP3". Options OP1 and OP2 are not password protected.