5005639 JOHNSON Service Manual - French

Illustration 1 g00481725
Block Diagram Of AC Voltage Display In the EMCP II+
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System Schematic For AC Transformer Box + (ATB+)Schematic For A Wye Connected Generator For All Models Covered By This Manual Except 3306B And 3406C
Table 1
Selection of AC Voltage Range    
GSC+ P020Setpoint    External Potential Transformer
   Input Voltages for AC Transformer Box (ATB+)
   GSC+ Internal Multiplier    Jumper    
700     None     0 - 700     5     Required    
150     None     0 - 150     1     None    
300     2:1     0 - 150     2     None    
500     3.33:1     0 - 150     3.33     None    
600     4:1     0 - 150     4     None    
750     5:1     0 - 150     5     None    
3000     20:1     0 - 150     20     None    
4500     30:1     0 - 150     30     None    
5250     35:1     0 - 150     35     None    
9000     60:1     0 - 150     60     None    
15000     100:1     0 - 150     100     None    
18000     120:1     0 - 150     120     None    
30000     200:1     0 - 150     200     None    Note: For related information, see Testing And Adjusting, "AC Voltage Range - Adjust".The P020 setpoint determines the proper AC voltage range and the internal multipliers that are used by the GSC+ for calculating AC voltage. If the external potential transformers are present, the GSC+ uses the internal multipliers to compensate for the ratio of turns of the external potential transformers. This must take place in order to ensure accurate calculations by the GSC+ for AC voltage .A jumper block is located in the relay module. The jumper block connects a circuit which will divide the AC voltage by five. The circuit reduces the AC voltage to an acceptable level for the GSC+ when P020 is 700. When setpoint P020 is 700, a multiplier of five is needed to compensate for the presence of the circuit even though no external potential transformer is present.Note: The jumper block should NOT be installed when P020 is NOT programmed to a value of 700. This will prevent voltage readings that are calculated incorrectly by the GSC+. The other values (150 through 30000) are used with an external potential transformer. These values result in input voltages from 0 to 150 ACV at the AC Transformer Box + (ATB+). No further reduction of the input voltage is required.
When the engine-generator, or any source to which the engine-generator is synchronized to, is operating, voltages up to 600V are present in the control panel.Do not short these terminal with line voltage to ground with any part of the body or any conductive material. Loss of life or injury could result from electrical shock or injury from molten metal.
Test Step 1. CHECK THE DISPLAY OF THE GSC+ FOR VOLTAGE READINGS
Start the genset.
Check the voltage readings on the display of the GSC+.Expected Result:The voltage readings on the GSC+ should be accurate.Results:
OK - The voltage readings on the GSC+ are accurate. Proceed to Test Step 2.
NOT OK - The voltage readings on the GSC+ are inaccurate. Proceed to Test Step 4.Test Step 2. CHECK THE DISPLAY OF THE GSC+ FOR CURRENT READINGS
Check the current readings on the display of the GSC+.Expected Result:The current readings on the GSC+ should be accurate.Results:
OK - The current readings on the GSC+ are accurate. Proceed to Test Step 3.
NOT OK - The current readings on the GSC+ are inaccurate. Proceed to Test Step 8.Test Step 3. CHECK THE DISPLAY OF THE GSC+ FOR POWER CONSUMPTION
Check the power consumption on the display of the GSC+.Expected Result:The power consumption that is displayed on the GSC+ should be accurate.Results:
OK - The power consumption that is displayed on the GSC+ is accurate.Repair: There is no problem at this time. Keep monitoring the system for inaccurate readings. Stop.
NOT OK - The power consumption that is displayed on the GSC+ is NOT accurate. Proceed to Test Step 10.Test Step 4. CHECK SETPOINT P020
Check the setpoint P020. See Testing and Adjusting, "Engine/Generator Setpoint Viewing OP2-0".Expected Result:P020 should be set to match the system's application. To find the correct setpoint, refer to Table 1 .Results:
OK - Setpoint P020 is set for the application. Proceed to Test Step 5.
NOT OK - Setpoint P020 is NOT set for the application.Repair: Program P020 to match the system's application. See Testing and Adjusting, "Engine/Generator Setpoint Programming OP5-0". Stop.Test Step 5. CHECK THE JUMPER FOR CORRECT INSTALLATION
Check the setpoint P020. See Testing and Adjusting, "Engine/Generator Setpoint Viewing OP2-0".
Check the jumper on the relay module for correct AC voltage range. See System Operation, "AC Voltage Range - Adjust".Expected Result:The jumper should be installed correctly in order to match the value in setpoint P020.Results:
YES - The jumper is inst