Utility Restored - Generac Power Systems 7 kW NG Repair Manual

Section 1.7
Automatic Operating Parameters
Auto
• Transfer to standby will occur if Utility fails (below 65% of
nominal) for 10 consecutive seconds.
• A five (5) second engine warm-up timer will initialize.
• Transfer back to the "Utility" position if Utility subsequently
returns.
• Transfer to the "Standby" position if Utility is still not present.
• Transfer back to Utility once Utility returns (above 75% of
nominal) for 15 seconds.
• Transfer back to Utility, if present, if the Generator is shut
down for any reason (such as the switch turned to the OFF
position or a shutdown alarm 0.
• After transferring back to Utility the engine will shut down,
after a one (1) minute cool-down timer expires.
Exercise
• Exercise will not function if the Generator is already running
in either Auto or Manual mode.
• During exercise, the controller will only transfer if Utility fails
during exercise for 10 seconds, and will follow the steps
outlined above for Auto operation.

UTILITY RESTORED

The Generator is running, CONTACTOR in "Standby", running in
Utility failure. When the Utility returns (above 75% of nominal),
a 15 second return to Utility timer will start. At the completion
of this timer, if the Utility supply is still present and acceptable,
the control will transfer the load back to the Utility and run the
engine through a one (1) minute cool down period and then
shut down. If Utility fails for three (3) seconds during this cool
down period, the control will transfer load back to the Generator
and continue to run while monitoring for Utility to return.
Page 28
PART 1
GENERAL INFORMATION