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| Illustration 1 | g01438113 |
System Schematic For Alarm Module (ALM) | |
The Alarm Module (ALM) is available as an option. The alarm module may be mounted on the front panel. Also, the alarm module 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 alarm module 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 Modules (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 03. 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 diagnostic code is cleared.
One possible cause of a CID 0333 FMI 03 diagnostic code is a short to the positive battery terminal ("BATT+").
The GSC+P treats a CID 0333 FMI 03 as an alarm fault. Clear the diagnostic code from the fault log after troubleshooting is complete.
Note: If a CID 0333 FMI 03 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 the "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 03. The diagnostic code is active if the upper display shows a CID 0333 FMI 03.
- 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 03 is active.
Results:
- OK - A CID 0333 FMI 03 is active. Proceed to Test Step 2.
- NOT OK - A CID 0333 FMI 03 has not occurred. The diagnostic code is NOT active. STOP
Test Step 2. CHECK FOR SHORTED DATA LINK WIRE
- Disconnect the cable from the negative battery terminal "(BATT-)" or open the optional battery disconnect switch.
- Disconnect both ends of the data link wire. The following contacts are the ends of the data link wire: pin 35 of the GSC+P and terminal 2 of the alarm module.
- Measure the resistance between the data link wire and "BATT+" terminal of the GSC+P.
Expected Result:
The resistance should be greater than 5000 ohms.
Results:
- OK - The resistance is correct. Proceed to Test Step 3.
- NOT OK - The resistance is NOT greater than 5000 ohms. The data link wire is faulty.
Repair: Refer to the system schematic in order to troubleshoot the harness wiring and repair the harness wiring that has failed between the ALM and the GSC+P. Refer to Testing and Adjusting, "Schematics and Wiring Diagrams" for further information.
STOP
Test Step 3. CHECK THE ALARM MODULE
- The cable on the "BATT-" terminal will remain disconnected or the optional battery disconnect switch is open.
- Measure the resistance from terminal 2 of the alarm module to "BATT+".
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 alarm module has failed.
Repair: Replace the alarm module.
STOP
Test Step 4. CHECK THE GSC+P.
- The data link wire remains disconnected.
- Connect the cable on the "BATT-" terminal of the battery or close the optional battery disconnect switch.
- Turn the engine control switch to the STOP position.
- Check for an active CID 0333 FMI 03 diagnostic code on the GSC+P.
Expected Result:
The diagnostic code is NO longer active.
Results:
- YES - The diagnostic code is NOT active. The diagnostic code does not exist at this time.
Repair: The initial diagnostic code was probably caused by a poor electrical connection or a short at one of the harness connectors that was disconnected and reconnected. Check the wiring for problems and resume normal operation. Watch for a recurrence of the problem.
STOP
- NO - The diagnostic code has not been corrected. The GSC+P may have failed.
Repair: Exit this procedure and perform this procedure again. Also, recheck if the diagnostic code is active. If the cause of the diagnostic code is not found, replace the GSC+P. Refer to Testing and Adjusting, "EMCP Electronic Control (Generator Set) - Replace" for more information.
STOP