DOWEL 5M4987 - Caterpillar

Illustration 1 g00474240
GSC Display Area (1) Dedicated Shutdown Indicators. (2) Fault Shutdown Indicators. (3) Fault Alarm Indicator. (4) Upper Display. (5) Lower Display. (6) Keypad.Service Mode is used for the following purposes.
Assist with troubleshooting.
Satisfy special applications.
Satisfy customer needs.
Verify generator set functions.
Calibrate generator set functions or adjust generator set functions.Service mode has ten options that can be selected. Service personnel use the option to obtain information about the generator set, and the operator can program functions of the generator set.
Table 1
OP1     Fault log viewing    
OP2     Setpoint viewing    
OP3     Password entry    
OP4     Fault log clearing    
OP5     Setpoint programming    
OP6     Spare Input/Output programming    
OP7     Hour meter programming    
OP8     Voltmeter/Ammeter programming    
OP9     Engine setpoint verification    
OP10     AC offset adjustment    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. There is a film on the door of the control panel that identifies each key. The service functions of the keys are listed below.Scroll Right Key - This key is used to view information by scrolling. When you are entering the password this key represents the number 1. Scroll Up Key - This key is used to scroll up through 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: In order to rapidly scroll through a large range of information, hold down the appropriate 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 memory of the GSC. Exit Key - This key is used to exit service mode. The display 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 operation.Procedure To Enter Service ModeNote: 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