The GSC300 is a generator-set controller. It is used on generator sets from DynaGen, GSC and Northern Lights, including the GSC300 and GSC300.
Used across brands: DynaGen, GSC, Northern Lights
Also fitted to: GSC 300.
| Symptom | Cause | Remedy |
|---|---|---|
| Constant Low oil failures. | Low oil level, Choosing the sender setting value to high, causing the GSC300 to always fail since the value of the sender is always below the chosen failure set point. Oil delay time needs to be extended to eliminate false failures. Faulty Sender | Add oil, Choose a lower sender failure set point. Increase the delay time from 0.5 to 6 seconds. Change out sender |
| Constant Temperature failures. | Low coolant level, Choosing the sender setting value to low, causing the GSC300 to always fail since the value of the sender is always above the chosen failure set point. Faulty Sender | Add coolant, Choose a higher sender failure set point. Change out sender |
| Crank output damaged, not working, or fuse blown on starter output | Check wiring and replace relay of fuse where necessary. | |
| Display Parameter for Temperature, Oil or Fuel displayed as >>> or <<< | Parameter is >>> ABOVE or <<< BELOW specified manufacturer sender range. | If further accuracy is required it may be necessary to install sender with proper range specifications. |
| Engine cranks but does not start | Out of fuel | Check fuel level, add fuel if necessary |
| Engine does not crank | Battery is low or terminals are dirty | Clean terminals and re-charge battery |
| Engine starts and immediately goes into Overspeed shutdown | Improper Overspeed setting | Verify the Overspeed setting with PC configuration software. Confirm that engine’s governor is properly calibrated for its intended use. |
| Engine starts but shuts down after ‘Oil BypassTM period’ due to low oil/high temp/Aux input | Oil/Temp/Auxiliary input wiring improperly connected. | Check wiring for proper connections. |
| Flashing Overspeed LED | Speed signal improperly connected, missing, or damaged. | Check speed signal wiring; replace damaged speed signal source. |
| Starter or starter solenoid damaged | Replace/repair damaged starter or starter solenoid. | |
| Steady Oil LED immediately on start-up, without engine actually cranking or starting. | False speed signal being detected by controller. This problem can sometimes occur in installations where there is AC power from inverters near generator output lines connected to the speed signal cable. | Install a small step down transformer between the speed sensing wires and the generator output. |
| Unit does not operate when powered to test mode | Power leads to unit are reversed | Confirm correct wiring for ground and +bat, and re-attempt testing. |
| Warm-Up Feature appears longer then time setting | Warm-Up Feature time setting does not begin until the Oil Bypass Time has expired. | Re-adjust Oil Bypass and/or Warm-Up timing. |
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.