SECTION 6
MAINTENANCE AND
TROUBLESHOOTING
PREVENTATIVE MAINTENANCE
The only preventative maintenance required on the DGC-500 is to periodically check that the connections
between the DGC-500 and the system are clean and tight.
This device contains long-life, aluminum electrolytic capacitors. For devices that are not in service (spares
in storage), the life of these capacitors can be maximized by energizing the device for 30 minutes once
per year.
DGC-500 units are manufactured using state-of-the-art, surface-mount technology. As such, Basler
Electric recommends that no repair procedures be attempted by anyone other than Basler Electric
personnel.
TROUBLESHOOTING
If you do not get the results that you expect from the DGC-500, first check the programmable settings for
the appropriate function. Use the following troubleshooting procedures when difficulties are encountered
in the operation of your genset control system.
Incorrect Display of Battery Voltage, Coolant Temperature, Oil Pressure, or Fuel Level
Step 1. Verify that all wiring is properly connected. Refer to Figures 5-7 through 5-14.
Step 2. Confirm that the SENDER COMM terminal (P19) 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 (P20) and the SENDER COMM terminal (P19).
Step 4. Verify that the correct senders are being used.
Step 5. Verify that the correct sender curves are being used.
Step 6. Ensure that the senders are operating properly.
Incorrect Display of Generator Voltage
Step 1. Verify that all wiring is properly connected. Refer to Figures 5-7 through 5-14.
Step 2. Ensure that the proper voltage is present at the DGC-500 voltage sensing inputs (P23, P26,
P29, and P30).
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 Figures 5-7 through 5-14.
Step 2. Ensure that the proper current is present at the DGC-500 current sensing inputs (P10 - P17).
Step 3. Verify that the current sensing transformer ratios are correct.
Step 4. Confirm that the current sensing transformers are correct and properly installed.
Incorrect Display of Engine RPM
Step 1. Verify that all wiring is properly connected. Refer to Figures 5-7 through 5-14.
Step 2. Verify that the flywheel teeth setting is correct.
Step 3. Confirm the nominal frequency setting.
Step 4. Verify that the prime mover governor is operating properly.
Step 5. Verify that the measured frequency of the voltage at the MPU input (P39 and P40) is correct.
9355400990 Rev H DGC-500 Maintenance and Troubleshooting 6-1
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