Automatic Operation

Operation

Automatic Operation Sequence

The generator’s control panel houses a logic control circuit board. This control board constantly monitors utility power source voltage. Should that voltage drop below a preset level, control board action will signal the engine to crank and start.

When utility source voltage is restored above a preset voltage level, the engine is signaled to shut down.

The actual system operation is not adjustable and is sequenced by sensors and timers on the control board, as follows:

Utility Voltage Dropout Sensor

•This sensor monitors utility source voltage.

•If utility source voltage drops below about 70 percent of the nominal supply voltage, the sensor energizes a

10 second timer. The timer is used to ‘sense’ brown-outs.

•Once the timer has expired, the engine will crank and start.

Utility Voltage Pickup Sensor

This sensor monitors utility power supply voltage. When that voltage is restored above 80 percent of the nominal source voltage, a time delay starts timing and the engine will go to engine cool-down.

Engine Cool-down Timer

•When the load is transferred back to the utility power source, the engine cool-down timer starts timing.

•The timer will run for about one minute, then the generator will stop.

•Minimum engine run time is 5 minutes.

To select automatic operation, do the following:

1.Set the main distribution panel circuit breaker that sends utility voltage to the transfer switch to ON.

2.Set the generator’s main circuit breaker to its ON position.

3.Set the system switch to AUTO.

caution

With the system switch set to AUTO, the engine may crank and start at any time without warning. Such automatic starting normally occurs when utility source voltage drops below a preset level or during the normal exercise cycle.

•To prevent possible injury that may be caused by such sudden starts, always set the system switch to OFF.

•Remove the 15 Amp fuse before working on or around the generator or transfer switch.

Checking Automatic Operation

To check the system for proper automatic operation, proceed as follows:

1.Turn OFF the main distribution panel circuit breaker sending power to the automatic transfer switch.

The engine will crank and start when the utility voltage drops out and the sensor has timed out. Let the system go through its entire automatic operation sequence.

2.With the generator output supplying its loads, turn ON the main distribution panel circuit breaker that supplies utility power to the automatic transfer switch.

3.The automatic transfer switch will transfer loads back to the utility power after 5 minute minimum run time and utility is restored.

4.The generator will run for an additional one minute for engine cool down, then shut down.

NOTE: If utility is restored and generator does not shut down after 10 minutes, set system switch to OFF and contact your installer or local service center.

This completes the test procedures for automatic operation. The home generator will now start automatically when utility power is lost and will supply power to the transfer switch.

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