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The definitions below describe the controls and functions of | If the engine does not engage (start) by the third attempt, | ||||
the | the engine will be shutdown by the MPEC's " Over Crank | ||||
1. | Pilot Lamp – Indicates that the generator is working | Protection" mode. If the engine engages at a speed (RPM's) | |||
| properly. | that is not safe, the MPEC will shutdown the engine by | |||
| initializing the "Over Speed Protection" mode. | ||||
2. | Panel Light – Normally used in dark areas or at night | ||||
Also the MPEC will shutdown the generator in the event of | |||||
| time. When activated, panel lights will illuminate. When | ||||
| low oil pressure, high coolant temperature, low coolant level, | ||||
| the generator is not in use be sure to turn the panel | ||||
| and loss of magnetic pickup. These conditions can be | ||||
| light switch to the OFF position. | ||||
| observed by monitoring the LED status indicators on the | ||||
3. | Frequency Meter – Indicates the output frequency in | ||||
front of the MPEC module. |
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| hertz (Hz). Normally 60 Hz ±1 Hz . |
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| A. | Off/Manual/Auto Switch | – This switch controls the | ||
4. | AC Ammeter – Indicates the amount of current the | ||||
| running of the generator. If this switch is left in the "OFF" | ||||
| load is drawing from the generator. |
| position, the generator will not run. When this switch is | ||
5. | AC Voltmeter – Indicates the single phase output |
| set to the manual position, the generator will start | ||
| voltage present at the UVW terminals. |
| immediately. |
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6. | Ammeter |
| If the generator is to be connected to a building's AC | ||
| the AC ammeter to indicate the current flowing to the |
| power source via a transfer switch (isolation), place | ||
| load connected to any phase of the output terminals, or |
| the switch in the auto position. In this position the | ||
| to be switched off. |
| generator will monitor the | AC line output from the | |
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| building's power source. |
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7. | Voltmeter |
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B. | Low Oil Pressure – Indicates the engine pressure | ||||
| the AC voltmeter to indicate phase to phase voltage | ||||
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between any two phases of the output terminals or to | has fallen below 15 psi. The oil pressure is detected | |
using variable resistive values from the oil pressure | ||
be switched off. | ||
sending unit. This is considered a major fault. | ||
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8.Panel Light Switch – When activated will turn on control
| panel light. | C. | High Coolant Temperature | – Indicates the engine | |
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| temperature has exceeded 215°F. The engine | |||
9. | Voltage Regulator Control – Allows | manual | |||
temperature is detected using variable resistive values | |||||
| adjustment of the generator’s output voltage. |
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| from the temperature sending unit. This is considered | |||
10. | MPEC – Microprocessor |
| a major fault. |
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| Engine Control Module – | D. | Overcrank Shutdown – Indicates the unit has | ||
| (MPEC) has a vertical row |
| attempted to start a pre- programmed number of times, | ||
| of status LED's (Figure 9), |
| and has failed to start. The number of cycles and | ||
| that when lit, indicate that an |
| duration are programmable.Typical programmable start | ||
| engine malfunction (fault), |
| settings is 3 cycles with a 10 second duration .This is | ||
| has been detected. When a |
| considered a major fault. |
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| fault has been detected the | E. | Overspeed Shutdown – | Indicates the engine is | |
| MPEC will evaluate the fault | ||||
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| running at an unsafe speed.This is considered a major | |||
| and if the fault is major will |
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| fault. |
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| shutdown the generator. |
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| Figure 9. MPEC ModuleF. | Engine Running – Indicates that engine is running at | |||
During cranking cycle , The MPEC will attempt to crank the | a safe operating speed. |
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engine for 10 seconds before disengaging.
11. Main Circuit Breaker – This