The DVR 2000E is a generator-set controller. It is used on generator sets from Magnapower, including the 1020 FSL 5000.
| Symptom | Cause | Remedy |
|---|---|---|
| Equipment Runs Normally on Utility Power, but Will Not Run on Generator Set | Voltage Waveform Is Distorted | Analyze load. Excessive SCR (Thyristor) loading will cause distortion. Some equipment may be sensitive to distorted waveforms (refer to Marathon Electric). |
| Generator Builds Voltage From Start-Up, Then Goes to Low (Residual) Voltage | Regulator Protective Circuit Is Operating | Check indicators on regulator. Correct problems and adjust regulator as required (refer to regulator manual). |
| Generator Operates Satisfactorily When Cold, but Shuts Down When Warm | Regulator Shutdown On Over Temperature | Correct cooling problems (refer to regulator manual). |
| Generator Produces High Voltage | Defective Voltmeter, Incorrect Operating Speed, Incorrect Connections, Defective Connections/Wiring, Regulator Adjustments, Diode Polarity Incorrect, or Voltage Regulator Not Operating Properly | Verify operation of panel meter with another meter that is known to be accurate (refer to section 8). Verify speed with tachometer or frequency meter. Verify generator connections (refer to drawings supplied with generator set and section 3). Inspect all wiring for grounds, open circuits, and short circuits. Adjust regulator (refer to regulator manual). Check diodes: verify proper diodes are installed and polarity is correct (refer to section 6). Adjust or replace regulator (refer to regulator instruction manual). |
| Generator Produces Low Voltage When Load Is Applied | Overload, Defective Ammeter, Droop Circuit | Measure amps and verify that the load does not exceed the nameplate rating of the generator (refer to section 8). Verify operation of ammeter by using a separate meter that is known to be accurate. If the generator set is equipped for paralleling, some voltage droop is normal as load increases (refer to the regulator instruction manual). Continue troubleshooting for symptoms “Generator Produces Low Voltage – No Load”. |
| Generator Produces Low Voltage – No Load | Underspeed Operation, Defective Voltmeter, Incorrect Generator Connections, Defective Connections/Wiring, Regulator Adjustments, Defective Diodes, Surge Suppressor, or Generator Windings | Check speed using tachometers and/or frequency meters. Verify operation of panel meter with another meter that is known to be accurate (refer to section 8). Verify generator connections (refer to drawings supplied with generator set and section 3). Inspect all wiring for grounds, open circuits, short circuits, loose connections, and dirty connections. Adjust regulator (refer to regulator manual). Check exciter field volts (refer to sections 8 and 12). Test generator with constant excitation (12 volt battery test). Refer to or Generator Windings sections 8 and 12. |
| Generator Produces No Voltage or Residual Voltage | Regulator Fuse Blown | Check fuse with an ohmmeter. Replace bad fuse; refer to regulator manual. |
| Generator Voltage Is Fluctuating | Incorrect Speed, Unstable Speed, Voltage Regulator Stability, Defective/Loose Connections, Defective Diodes, Surge Suppressor, or Generator Windings, Remote Voltage Adjust (if used), or Defective Regulator | Verify speed with tachometer or frequency meter. Verify governor stability. Adjust regulator stability (refer to regulator manual). Inspect all wiring for loose or dirty connections. Test generator with constant excitation (12 volt battery test). Refer to sections 8 and 12. Check operation (refer to regulator manual) if used. Replace regulator (refer to regulator manual). |
Fault codes and symptom→remedy steps extracted from this controller’s service/owner documentation; verify against the official manual before servicing. Aggregated from the service documentation of generator sets built on this controller.