Winco DGC-2020 - Manual (Page 214)

7-2 DGC-2020 Maintenance and Troubleshooting 9400200990 Rev K
Step 3. Verify that all Ethernet devices comply with IEC 61000-4 series of specifications for Industrial
Ethernet Devices. Commercial devices are not recommended and may result in erratic network
communications.
USB Port Does Not Operate Properly
Step 1. Verify that the proper port of your computer is being used. For more information, refer to
Section 4, BESTCOMSPlus Software, Communication.
CANbus Communication Does Not Operate Properly
Step 1: Verify that there is a 120-ohm termination resistor on each end of the bus section of the wiring,
and that there are not any termination resistors at any node connections that are on stubs from
the main bus.
Step 2: Check all CANbus wiring for loose connections, and verify that the CAN H and CAN L wires
have not gotten switched somewhere on the network.
Step 3: Verify that the cable length of the bus section of the wiring does not exceed 40 meters, and
verify that any stubs from the main bus do not exceed 3 meters in length.
Step 4: If the Engine ECU is a Volvo or MTU ECU, verify that the ECU Configuration setting is set to
match the ECU configuration.
Inputs and Outputs
Programmable Inputs Do Not Operate as Expected
Step 1. Verify that all wiring is properly connected. Refer to Section 6, Installation, Connections.
Step 2. Confirm that the inputs are programmed properly.
Step 3. Ensure that the input at the DGC-2020 is actually connected to the BATT– terminal (2).
Programmable Outputs Do Not Operate as Expected
Step 1. Verify that all wiring is properly connected. Refer to Section 6, Installation, Connections.
Step 2. Confirm that the outputs are programmed properly.
Metering/Display
Incorrect Display of Battery Voltage, Coolant Temperature, Oil Pressure, or Fuel Level
Step 1. Verify that all wiring is properly connected. Refer to Section 6, Installation, Connections.
Step 2. Confirm that the SENDER COM terminal (11) is connected to the negative battery terminal and
the engine-block side of the senders. Current from other devices sharing this connection can
cause erroneous readings.
Step 3. If the displayed battery voltage is incorrect, ensure that the proper voltage is present between
the BATT+ terminal (3) and the SENDER COM terminal (11).
Step 4. Verify that the correct senders are being used.
Step 5. Use a voltmeter connected between the BATT-terminal (2) and the SENDER COM terminal
(11) on the DGC 2020 to verify that there is no voltage difference at any time. Any voltage
differences may manifest themselves as erratic sender readings. Wiring should be corrected so
that no differences exist.
Step 6: Check the sender wiring and isolate sender wiring from any of the AC wiring in the system. The
sender wiring should be located away from any power AC wiring from the generator and any
ignition wiring. Separate conduits should be used for sender wiring and any AC wiring.
Incorrect Display of Generator Voltage
Step 1. Verify that all wiring is properly connected. Refer to Section 6, Installation, Connections.
Step 2. Ensure that the proper voltage is present at the DGC-2020 voltage sensing inputs (41, 39, 37,
and 35).
Step 3. Verify that the voltage transformer ratio and sensing configuration is correct.
Step 4. Confirm that the voltage sensing transformers are correct and properly installed.
Incorrect Measurement or Display of Generator Current
Step 1. Verify that all wiring is properly connected. Refer to Section 6, Installation, Connections.