Basler Electric DGC-2020HD - Manual (Page 304)

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Maintenance and Troubleshooting DGC-2020HD
the Bus Condition Detection settings accordingly. The synchronizer will never activate if the Bus
is Dead or Failed (i.e. not stable).
Step 3: Check that the DGC-2020HD is trying to initiate a breaker closure. To determine the sources of
breaker close requests, refer to the Breaker Management chapter.
Synchronizer Active for a Short Time, Then Stops
Step 1: Check if a Sync Fail pre-alarm or a Breaker Close Fail pre-alarm is occurring or has occurred.
The synchronizer stops acting when such a pre-alarm occurs. Press the Off button or the Reset
button on the DGC-2020HD front panel to clear these pre-alarms.
Step 2: Verify that the Sync Fail Activation delay is sufficiently long to allow the synchronizer to
complete the synchronization process.
Step 3: Verify that the Breaker Close Wait time is not too short causing a pre-alarm to occur before the
breaker closes when a breaker close is initiated by the DGC-2020HD.
Synchronizer Does Not Lower Engine Speed Allowing Alignment of Bus and Generator
Navigate to the Settings, Programmable Outputs, Analog Output Settings, GOV Output screen and set
Speed Response to Decreasing.
Synchronizer Does Not Raise Engine Speed Allowing Alignment of Bus and Generator
Using the front panel HMI, navigate to the Settings > Programmable Outputs > Analog Output Settings >
GOV Output screen and set Speed Response to Decreasing.
Synchronizer Does Not Lower the Generator Voltage to Achieve Matching of Bus and Generator Voltages
Navigate to the Settings, Programmable Outputs, Analog Output Settings, AVR Output screen and set
Voltage Response to Decreasing.
Synchronizer Does Not Raise Generator Voltage to Achieve Matching of Bus and Generator Voltages
Navigate to the Settings, Programmable Outputs, Analog Output Settings, AVR Output screen and set
Voltage Response to Decreasing.
Speed Bias
Engine Speed Does Not Change When Speed Bias Voltage Changes
Verify that the engine speed will change when the speed bias changes. As a test, you can force a voltage
on the speed bias output by setting the Min Output Voltage and Max Output Voltage to the same value by
navigating to Settings, Programmable Outputs, Analog Output Settings, GOV Output. If the bias is current
based, you can force a fixed current by setting the Governor Output Voltage Minimum and Maximum to
the same value by navigating to Settings, Programmable Outputs, Analog Output Settings, GOV Output.
If the speed still does not change when varying the bias:

Verify that the governor or ECU is equipped and configured to accept bias inputs.

Check connections to verify the wiring to the governor bias is correct.

If you have an engine with an ECU, check ECU programming to verify it is set up to accept a
speed bias input.
Engine Speed Decreases When Speed Bias is Increased
Navigate to the Settings, Programmable Outputs, Analog Output Settings, GOV Output screen and set
Speed Response to Decreasing.
Engine Speed Increases When Speed Bias is Decreased
Navigate to the Settings, Programmable Outputs, Analog Output Settings, GOV Output screen and set
Speed Response to Decreasing.