No Load Test
To allow a timed No Load Test of the engine/generator set while using the AMF control application, a digital input contact from an external timer must be programmed for NO LOAD Test The sequence of operation for a No Load Test condition is as follows:
1.With the utility supply normal and the generator stopped, a no load test sequence may be initiated by closing an external exercise timer contact to the programmed digital input for No Load Test.
2.After the external exercise timer contact closes, the engine will start and
3.The engine will continue to run as long as the external exercise timer contact remains closed.
4.After the external exercise timer contact opens, the engine will continue to run for its cool down time as programmed, then it will automatically stop.
Standard Faults When a fault occurs, information about the fault is displayed. The engine controller has many analog and digital inputs for monitoring and control operations. Three types of faults are used:
1.Internal Faults are derived from a combination of digital and analog inputs.
2.Digital Input Faults are initiated from external contact inputs.
3.Analog Input Faults are initiated from external analog signal inputs.
Figure 4‐15 shows how the controller inputs and outputs are organized.
A description of each is provided.
Internal Faults
Overspeed Shutdown | Overspeed Shutdown is initiated when the engine's speed has increased above the overspeed setpoint. The overspeed fault | |||
| circuit is internally programmed as a latching shutdown fault. The overspeed shutdown fault circuit is programmable for the | |||
| percentage of nominal engine speed (i.e. overspeed setpoint) and for the transient time delay period. The programming | |||
| prompts for overspeed are located in the main menu programming loop. | |||
Loss of Speed | Loss Of Speed is initiated when the engine's speed sensing circuit does not detect a speed signal for a period more than 2 | |||
Alarm/Shutdown | seconds following a run signal. The loss of speed fault may be user programmed as a latching shutdown fault or alarm only. | |||
| The programming prompts for loss of speed are located in the main menu programming loop. | |||
Overcrank Shutdown | Overcrank Shutdown is initiated when the engine fails to start after the selected crank time or number of crank cycles. The | |||
| overcrank fault circuit is internally programmed as a latching shutdown fault and is not user programmable. | |||
Switch not in AUTO | Switch not in AUTO is initiated when the controller's operating mode switch is changed from the auto position to any other | |||
| position (ON the keypad). This fault is internally programmed as a non latching alarm. In the main programming loop, this | |||
| alarm may be user programmed to initiate the common fail output relay. | |||
Digital Input Faults | Four digital faults are provided and these are user programmable. Each digital fault input circuit is activated by a remote | |||
Digital Inputs (N/O or N/C) | sensing contact that is external to the controller. Each digital fault input circuit may be programmed with a unique fault label | |||
| description as stored in the controller's | |||
| Factory settings have four standard digital faults as follows: | |||
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| Fault | Fault | Digital Inputs | |
| Name | Action | Terminal # |
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| Low Oil Pressure | Shutdown | 1 |
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| High Engine Temperature | Shutdown | 2 |
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| Battery Charger Input Fail | Alarm | 3 |
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| Low Fuel Level | Alarm | 4 |
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The following is a list of all digital faults: |
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High Bearing Temp | Failed To Sync | Reverse Power | Bat Charger Input Fail |
High Cooler Vibration | Low Fuel Press | Fail To Sync | Bat Chrg Trouble |
High Engine Temp | Low Engine Temp | Vent Damper Fail | Bat Charger Fail |
High Engine Vibration | Low Oil Pressure | Gen Breaker Open | DC Fail |
High Fuel Level | Low Fuel Level | Ground Fault | Breaker Tripped |
High Oil Level | Low Oil Level | No Load Test | Basin Rupture |
High Oil Temp | Fuel Leak | ATS In Bypass |
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High Winding Temp | Low Fuel Press | Remote Emerg. Stop |
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*Highintkmanftemp | Low Coolant Level | Air Damper Tripped |
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“Blank” (i.e. no text for unused inputs)
MN2408 | Operation 4‐17 |