The following sections offer the general troubleshooting information for the MECP/MGCP IIIB.
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| Illustration 1 | g06033666 |
The status bar is at the top of the DCU display screen. The status bar displays engine state (1), alarm status (2), and icons (3).
The following is a list of the engine state texts that appear in the status bar.
Ready - Ready to start.
Starting Denied - A shutdown event is active, refer to the alarm list.
Start Disabled - Something is preventing start (such as the start disabled switch or a "Ready to Start" condition such as "Starting Air Pressure is Low").
Shutdown Stopping - A shutdown event has occurred and the engine is stopping.
Shutdown Stopped - A shutdown event has occurred and the engine has stopped.
Initial Start Delay - The DCU is verifying that all starting conditions are satisfied.
Prelube Manual - The DCU has received a start command from the local operator or the remote panel (RP). The DCU is prelubing the engine.
Prelube Automatic - The DCU has received an automatic start command (from the PMS or switch gear). The DCU is prelubing the engine.
Cranking Manual - The DCU has received a start command from the local operator or the RP. The DCU is starting the engine.
Cranking Automatic - The DCU has received an automatic start command (from the PMS or switch gear). The DCU is starting the engine.
Running - The engine is running normally.
Safety Running - The DCU has no speed information, but the last known state of the engine was "Running" and the DCU has not received a stop command.
Delayed Stop - The engine has received an automatic stop command and is waiting for the "Automatic Stop Delay" to expire. The "Automatic Stop Delay" allows the PMS or switch gear to disconnect breakers.
Cooling - The engine is cooling down.
Normal Stopping - The engine is stopping normally.
Safety Stopping - The DCU has no speed information, but the last known state of the engine was "Running" and the DCU has received a stop command. It will remain in "Safety Stopping" mode until the "Safety Stopping Timer" has elapsed.
Stopped - The engine has stopped normally.
The following alarm statuses are displayed in the status bar:
Red, flashing - Shutdown or alarm in alarm list, unacknowledged
Red, steady - Shutdown or alarm in alarm list
Yellow, flashing - Warning or alarm in alarm list, unacknowledged
Yellow, steady - Warning in alarm list
White, flashing - Diagnostics in alarm list, unacknowledged
White, steady - Diagnostics in alarm list
Dark - No issues
The following are the alarm mode icons that appear in the status bar.
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| Illustration 2 | g06035214 |
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(3A) Derate Active
(3B) Shutdown Active (3C) Shutdown Override Active | |
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| Illustration 3 | g06033688 |
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(4) Alarms
(5) Soft buttons (6) Filters (7) Return | |
The alarm list shows all active and/or unacknowledged alarms. Descriptive text, numbers, symbols, and color codes are used to describe each alarm. Select an alarm to expand the entry for more information.
Pressing the "Alarm List" button to display the alarm list also silences the buzzer. The Alarm List button is the bell on the right side of the DCU, next to the touchscreen. The buzzer will begin again if a new alarm occurs while the alarm list is displayed. Press the "Alarm List" button to silence it and stay in the alarm list.
A number is displayed along with the alarm. The significance of these numbers is outlined by the following:
Zero (0) - Shutdown
One (1) - Derate or alarm
Two (2) - Warning
Three (3) - Diagnostic (includes J1939 DM1 messages regardless of the FMI)
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| Illustration 4 | g06088368 |
Each alarm is highlighted in a specific color. The color represents the type of alarm . Refer to Illustration 4.
To acknowledge a single alarm, select the desired alarm in the list and press the "Acknowledge" button once.
The filters help with focused diagnostics. The following are the available filters:
Panel Alarms - Only show alarms generated by panels such as DCU, SDU, and RIO.
J1939 Diag. - Displays only DM1 alarms from the two J1939 buses.
All Alarms - All alarms are shown.
Silence All Alarms (Excluding SDU Alarms)
Press and hold the Acknowledge button for one second. The DCU may be configured to acknowledge visible events only. If so, the notification seen in Illustration 5 will be shown.
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| Illustration 5 | g06033698 |
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| Illustration 6 | g06033706 |
To silence either a single shutdown or all shutdown event alarms at once, press and hold the "Acknowledge" button for one second. The notification in Illustration 6 will be shown. The "Acknowledge" button must be pressed again to silence the alarms.
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| Illustration 7 | g06033720 |
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Troubleshooting menus (8) Supply (9) Switch (10) 4 - 20 mA (11) Thermistor (12) Voltage Sensor (13) Communication (14) J1939 Nodes (15) Output (16) Run Sources (17) Start Conditions (18) Button Test (19) Diagnostics | |
There are troubleshooting menus for the DCU and each connected device. The menus seen in Illustration 7 are only for the DCU. The other devices have similar menus.
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| Illustration 8 | g06034115 |
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Typical troubleshooting screen | |
The troubleshooting screens show several useful pieces of information. Only the inputs that are activated in the configuration are shown.
Description - The "Toggle" button changes the description to any customized name that is configured to aid in troubleshooting.
Terminal - The connector and pin on the back of the DCU.
Status - Open, Closed, Not in use
Data - The physical state of the input.
Note: The columns headers may be dragged and resized by swiping from side to side.
This screen shows all devices on the two J1939 data buses. The "Toggle" button switches between J1939:1 and J1939:2.
Note: Once a "J1939 Note Lost" alarm is acknowledged in the alarm list, the lost node will be removed from this screen.
- Select the "Start Conditions" icon to show everything capable of preventing the DCU from starting.
Show/hide table
Illustration 10 g06033757 - If the "Ready to Start Signal" is active (an "X" is shown under "Preventing Start"), press the RTS soft button to see the "Ready to Start" screen.
- Active items in the "Ready to Start" screen may not have an alarm in the alarm list. For example, "Prelube Complete" would not normally cause an alarm, but it must be done before starting the engine.
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| Illustration 9 | g06033753 |
Refer to the Application & Installation Guide, LEBM0062, "Cat A&P Controls Application & Installation Guide" for more information on configuring "Ready to Start" criteria.
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| Illustration 11 | g06033730 |
The button test screen allows the user to verify operation of the four touchscreen buttons to the right of the display.
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| Illustration 12 | g06033748 |
The diagnostics screen shows information about the CPU and circuit board inside the DCU.
This troubleshooting guide is intended for use with Schematic, UENR7807, "Marine Engine and Genset Control MECP IIIB Panel Electrical System". The electrical schematic for the MECP/MGCP IIIB panel is divided by sections with numbers indicating the terminal blocks. Refer to Table 1 for the Schematic terminals mentioned in this troubleshooting guide.
| Terminals | |
|---|---|
| Terminal List | Description |
| X1.1:1 | +24VDC Primary Power Input |
| X1.1:2 | 0VDC Primary Power Input |
| X1.1:3 | +24VDC Secondary Power Input |
| X1.1:4 | 0VDC Secondary Power Input |
| X1.2:9 | Remote Stop |
| X1.2:10 | Remote Stop |
| X1.2:11 | Remote Acknowledge |
| X1.2:12 | Remote Acknowledge |