883085 Mercury STUD

Illustration 1 g03368235
Front of the control panel
(1) Direct control unit panel (DCU panel)
(2) "READY TO START" lamp
(3) "EMERGENCY STOP" lamp
(4) "GENERAL ALARM" lamp
(5) "EMERGENCY STOP" switch
(6) "TEST" switch for the panel lamps
(7) "ENGINE CONTROL" switch
Illustration 2 g03367772
Switches on the inside panel of the control panel
(8) "LOCAL THROTTLE" switch
(9) "CRANK OVERRIDE" switch
(10) "MANUAL RUN/STOP" switch
(11) "LOW IDLE" switch
(12) "ENGINE PRTN OVERRIDE" switch
(13) "PRELUBE OVERRIDE" switch
(14) "MANUAL PRELUBE" switch "READY TO START" Lamp (2)
The "READY TO START" lamp is illuminated when none of the following conditions exist:
Faults on the engine control input are present.
The starting air pressure is outside of operating limits.
Faults exist on the starter relay.
The barring device is engaged.
Level 3 events are active.
Emergency stops are engaged.
The air shutoff is active."EMERGENCY STOP" Lamp (3)
The "EMERGENCY STOP" lamp will illuminate when an engine shutdown occurs due to an emergency stop condition."GENERAL ALARM" Lamp (4)
The "GENERAL ALARM" lamp will illuminate when an alarm is active."EMERGENCY STOP" Switch (5)
Use the "EMERGENCY STOP" switch ONLY in an emergency situation. DO NOT use the "EMERGENCY STOP" switch for normal engine stopping. After an emergency stop, DO NOT start the engine until the problem that caused the emergency stop has been corrected."TEST" Switch (6)
The "TEST" switch is a momentary push switch. Activation of the "TEST" switch activates all of the lamps on the door of the panel. Activation of the "TEST" switch tests the"GENERAL ALARM" relay and the "READY TO START" relay. "ENGINE CONTROL" Switch (7)
OFF/RESET - When the "ENGINE CONTROL" switch is in the OFF/RESET position, all alarms, safety shutdowns, and emergency shutdowns are reset. If the switch remains in this position, all electronics will enter a power-saving mode.LOCAL - When the "ENGINE CONTROL" switch is in the LOCAL position, the controls are active and are in LOCAL mode. All remote engine controls are disabled. The engine may only be started and stopped locally from the DCU controller. The following switches inside of the door panel are operable: "LOW IDLE", "PRELUBE OVERRIDE", "CRANK OVERRIDE", "ENGINE PROTECTION OVERRIDE" and "MANUAL START/STOP".REMOTE - When the "ENGINE CONTROL" switch is in the REMOTE position, the controls on the LEC panel are disabled except for the "EMERGENCY STOP" switch. The remote input capabilities of the DCU are activated."LOCAL THROTTLE" Switch (8)
The "LOCAL THROTTLE" switch is only active when the "ENGINE CONTROL" switch is in the LOCAL position and 0-5V is selected in the software. "CRANK OVERRIDE" Switch (9)
Note: Do not use the "CRANK OVERRIDE" switch for normal engine operation. The starting motor may turn during engine operation which may damage the starting motor and the engine flywheel teeth.The "CRANK OVERRIDE" switch is a two position switch and is only operational when the "ENGINE CONTROL" switch is in the LOCAL position. The operator may use the "CRANK OVERRIDE" switch to crank the engine with the engine starting motor when the engine control unit has completed the cycle crank sequence. The "CRANK OVERRIDE" switch is intended for use in system troubleshooting and engine maintenance. The switch can also be used to start the engine in an emergency when the engine control unit fails to crank the engine or when the primary engine control unit has failed and the engine is to be started with the secondary engine control unit. "MANUAL RUN/STOP" Switch (10)
The "MANUAL RUN/STOP" switch is a three position momentary toggle switch which automatically returns to the center position when not in use. The switch is only operational when the "ENGINE CONTROL" is in the LOCAL position. The "MANUAL RUN/STOP" switch may be used to start or stop the engine if the DCU fails. Do not operate the engine with this switch unless the DCU has failed."LOW IDLE" Switch (11)
The "LOW IDLE" switch is only operational when the "ENGINE CONTROL" switch is in LOCAL mode. Activating the "LOW IDLE" switch reduces the engine speed to low idle."ENGINE PRTN OVERRIDE" Switch (12)
When the "ENGINE PRTN OVERRIDE" switch is activated, the engine protection that is provided by the engine monitoring system is ignored. If a diagnostic condition that requires an engine shutdown is detected monitoring system, the engine ECM will ignore the shutdown request. The use of the "ENGINE PRTN OVERRIDE" switch to operate an engine with an active fault code may cause the engine to be seriously damaged or destroyed."PRELUBE OVERRIDE" Switch (13)
The "PRELUBE OVERRIDE" switch is a two position switch and is only operational when the "ENGINE CONTROL" switch is in the LOCAL position. The "PRELUBE OVERRIDE" switch allows the operator to override the prelube pump sequence at the beginning of the engine crank sequence during engine start-up. Use the "PRELUBE OVERRIDE" switch for troubleshooting and to provide for immediate engine starting during emergency situations."MANUAL PRELUBE" Switch (14)
The switch "MANUAL PRELUBE" is used to initiate a manual prelubrication. The "MANUAL PRELUBE" switch is only operational when the "ENGINE CONTROL SWITCH" is in the LOCAL position.DCU Panel
Illustration 3 g03368709
(15) LCD screen
(16) "POWER" indicator lamp
(17) "ALARM" list
(18) "START" switch
(19) "STOP" switch
(20) Context-sensitive menu switches (soft switches)
(21) "SCROLL DOWN" switch
(22) "SCROLL UP" switch
(23) "MENU" switch LCD Screen (15)
Illustration 4 g02459816
Typical example of the DCU 410 control panel