Section 3 - Operation
Guardian
3.Under no load condition, increase the GAIN pot as much as possible without causing instability.
4.Apply 1/4, 1/2, 3/4 and full load to the unit. Decrease the GAIN pot if there is instability at any load point.
5.Under full load condition, increase the stability pot until the unit returns to 60 Hertz (or 50 Hertz in 50 Hertz applications).
6.Reduce load to 3/4, 1/2, 1/4 and no load. Decrease the stability pot if there is instability at any load point.
7.Adjust differential pot to make the recovery to load changes even faster and minimize load change undershoot and overshoot. If it is set too high, it may introduce oscillations at some load. It can be set to zero (full CCW) if a small amount causes oscillations at some load.
Figure 3.2 — Engine Governor Adjustment
•Let the generator engine run at
•On the generator console, set the Auto/Off/ Manual switch to Off. Wait for engine to come to a complete stop.
•For transfer to utility position, refer to the Owner’s Manual of the particular transfer switch.
•Turn on the utility power supply to the transfer switch, using whatever means provided (such as a utility main line circuit breaker). The utility power source now powers the loads.
3.6AUTOMATIC OPERATION
To set the system for fully automatic operation, pro- ceed as follows:
•Check that load circuits are connected to the utility power supply.
•Set the AUTO/OFF/MANUAL switch to its AUTO position.
•Set the generator main circuit breaker to its ON or CLOSED position.
3.7WEEKLY EXERCISE CYCLE
The engine control board will start and run the gen- erator once every seven days for approximately 12 minutes. If utility should fail during this exercise period, the engine control board will transfer the load to the generator output and continue to run until util- ity returns.
On the day, and at the time of day chosen for the gen- erator to exercise, set the weekly exercise cycle as fol- lows:
1.Place the AUTO/OFF/MANUAL switch in the auto position (Figure 3.3).
2.Press and hold the “Set Exercise” switch for five seconds, then release.
Figure 3.3 - “Set Exercise Time” Switch
3.5RETRANSFER AND SHUTDOWN
When utility power source voltage has been restored, electrical loads may be transferred back to that source and the generator can be shut down as fol- lows:
• Verify that utility power supply voltage to the trans- |
fer switch has been positively turned Off, using |
whatever means provided (such as utility main line |
AUTO
OFF
MANUAL
SYSTEM READY
LOW BATTERY
LOW OIL PRESSURE LOW COOLANT LEVEL
HI COOLANT TEMPERATURE 
OVER SPEED
OVER CRANK
LED INDICATORS:
0F0653
OFF
ON
SET
EXERCISE
TIME
TO SET EXERCISER TIME
1)PLACE AUTO/OFF/MANUAL SWITCH TO AUTO POSITION.
2)HOLD "SET EXERCISE TIME" SWITCH IN "ON" POSITION FOR
THREE SECONDS AND RELEASE. THE EXERCISER IS NOW SET. ALL FIVE RED LED'S WILL FLASH FOR
10 SECONDS. THEN THE UNIT WILL START, RUN THROUGH THE EXERCISE CYCLE AND SHUTDOWN.
RISK OF ELECTRICAL PARTS INSIDE. R
FOR
ATTENTION: POUR L' ICE A UN COM CAN
NAUTOMATICA INJURY REMO
circuit breaker). |
• Set the generator’s main circuit breaker to its Off |
or Open position. |
FLASHING GREEN LED = NO UTILITY SENSE
5 FLASHING RED LED'S = EXERCISER NOT SET
(IN AUTO MODE ONLY) SOLID GREEN LED = SYSTEM READY, UTILITY POWER ON RED LED'S = INDIVIDUAL FAULT
(SEE OWNER'S MANUAL FOR COMPLETE DETAILS)
THIS EMERGE
Generac® Power Systems, Inc. 15