 | |
| Illustration 1 | g01438113 |
System Schematic For Alarm Module (ALM) | |
The Alarm Module (ALM) is available as an option. The ALM may be mounted on the front panel. Also, the ALM may be placed at a distance from the control panel as a remote annunciator. The ALM is used in order to satisfy the requirements of the customer. The ALM may be used in order to satisfy National Fire Protection Association (NFPA) requirements by annunciating the presence of a diagnostic code.
The ALM communicates with the GSC+P by a serial data link. When the data link malfunctions, all of the indicators on the ALM, that are controlled by the data link, flash at a rate of .5 Hz.
Note: The maximum number of the ALM or the Customer Interface Module (CIM) that may be connected to the serial data link is equal to three. The maximum distance between a module and the GSC+P is 305 m (1000 ft). If these specifications are not met, the ALM indicators may begin to flash. Also, the GSC+P may show a CID 0333 FMI 04. If the setup is not in compliance with the specifications, reduce the number of modules and/or shorten the distance to the modules.
Note: Diagnostic codes are created when the harness connector is disconnected from the GSC+P during these troubleshooting procedures. Clear these created diagnostic codes after the particular problem is corrected and the particular diagnostic code is cleared.
The possible cause of a CID 0333 FMI 04 is a short from the negative battery terminal "(BATT-)" to the data signal.
The GSC+P treats a CID 0333 FMI 04 as an alarm fault. Clear the diagnostic code from the fault log after troubleshooting is complete.
Note: If a CID 0333 FMI 04 is active on the upper display and no alarm module is installed, then check the terminal strips on the subpanel for a short. Perform the check from the signal wire to "BATT-". Also, check the customers' connection box for a short from the alarm data signal wire to "BATT-".
Test Step 1. CHECK IF THE DIAGNOSTIC CODE IS ACTIVE
- Turn the Engine Control Switch (ECS) to the OFF/RESET position and then turn the ECS to the STOP position.
- Press the "Alarm Codes" key.
- Observe the upper display for a CID 0333 FMI 04. The diagnostic code is active if the upper display shows a CID 0333 FMI 04.
- If the diagnostic code is not showing, enter the service mode and view the fault log. Check the upper display if the diagnostic code is active.
Expected Result:
A CID 0333 FMI 04 is active.
Results:
- OK - A CID 0333 FMI 04 is active. Proceed to Test Step 2.
- NOT OK - A CID 0333 FMI 04 has not occurred. The diagnostic code is NOT active. STOP
Test Step 2. CHECK THE GSC+P.
- Disconnect the cable on the "BATT-" terminal of the battery or open the optional battery disconnect switch.
- Disconnect the data link wire from pin 35 of the GSC+P.
- Reconnect the cable on the "BATT-" terminal of the battery or close the optional battery disconnect switch.
- Turn the ECS to the STOP position.
Expected Result:
The CID 0333 FMI 04 is inactive.
Results:
- OK - The CID 0333 FMI 04 is inactive. Proceed to Test Step 3.
- NOT OK - The CID 0333 FMI 04 remains active. The GSC+P may have failed.
Repair: The GSC+P may have failed. It is unlikely that the GSC+P has failed. Exit this procedure and perform this procedure again. Replace the GSC+P if the CID 0333 FMI 04 remains active. Refer to Testing and Adjusting, "EMCP Electronic Control (Generator Set) - Replace"
STOP
Test Step 3. CHECK THE ALM AND DATA LINK WIRE
- The data link wire remains disconnected from the GSC+P.
- Disconnect the cable on the "BATT-" terminal of the battery or open the optional battery disconnect switch.
- Disconnect the data link wire from terminal 2 of the Alarm module.
- Measure the resistance from the data link wire to the negative battery terminal on the GSC+P.
Expected Result:
The resistance should be greater than 5000 ohms.
Results:
- OK - The resistance is greater than 5000 ohms. Proceed to Test Step 4.
- NOT OK - The resistance is NOT greater than 5000 ohms. The data link wiring is faulty.
Repair: Use the system schematic in order to troubleshoot and repair the harness wiring that has failed between the ALM and the GSC+P. Refer toTesting And Adjusting, "Schematics and Wiring Diagrams".
STOP
Test Step 4. CHECK THE ALARM MODULE.
- The cable on the "BATT-" battery terminal remains disconnected or the optional battery disconnect switch is open.
- The data link wire remains disconnected.
- Measure the resistance from terminal 2 of the ALM to "BATT-".
Expected Result:
The resistance should be greater than 5000 ohms.
Results:
- OK - The resistance is greater than 5000 ohms. The problem may be intermittent.
Repair: Use the System Schematic and examine the wiring between the GSC+P and the ALM for nicks, abrasion, or other damage. Refer to Testing And Adjusting, "Schematics and Wiring Diagrams".
STOP
- NOT OK - The resistance is NOT greater than 5000 ohms. The ALM has failed.
Repair: Replace the ALM.
STOP