Automatic Transfer Operation; Automatic Sequence Of Operation; Utility Failure; Cranking - Generac GH-410 Manual Del Propietário

Section 3: Operation

Automatic Transfer Operation

To select automatic operation:
Make sure the transfer switch main contacts are
1.
set to the UTILITY position (loads connected to the
utility power source).
Be sure that normal UTILITY power source voltage
2.
is available to transfer switch terminal lugs N1 and
N2.
Press the AUTO button on the control panel
3.
interface.
Set the main
4.
Disconnect) to the ON (Closed) position.
With these steps complete, the generator will start
automatically when utility source voltage drops below a
preset level. After the unit starts, loads are transferred to
the standby power source.

Automatic Sequence of Operation

Utility Failure

With the generator set to AUTO, when utility fails (below
65% of nominal) a 5 second (dealer programmable) line
interrupt delay time is started. If utility is still gone when
the timer expires, the engine will crank and start. Once
started, a 5 second engine warm-up timer will be
initiated. When the warm-up time expires, the controller
will transfer the load to the generator. If the utility power is
restored (above 80% nominal) at any time from the
initiation of the engine start until the generator is ready to
accept load (5 second warm-up time has not elapsed),
the controller will complete the start cycle and run the
generator through its normal cool down cycle, however,
the load will remain on the utility source.

Cranking

The system will control the cyclic cranking as follows:
•
8 kW Unit: 5 cranking cycles as follows: 15 second
crank, seven (7) second rest, followed by four (4)
additional cycles of seven (7) second cranks
followed by seven (7) second rests.
•
11 - 22 kW Units: 5 cranking cycles as follows: 16
second crank, seven (7) second rest, 16 second
crank, seven (7) second rest, followed by three (3)
additional cycles of seven (7) second cranks
followed by seven (7) second rests.

Cold Smart Start

The Cold Smart Start feature can be enabled in the EDIT
menu. With Cold Smart Start enabled, the generator will
monitor ambient temperature and the warm-up delay will
be adjusted based on prevailing conditions.
16
circuit breaker (Generator
On a startup in AUTO mode, if the ambient temperature
is below a fixed temperature (based on model) the
generator will warm-up for 30 seconds. This allows the
engine to warm before a load is applied. If the ambient
temperature is at or above the fixed temperature, the
generator will startup with the normal warm-up delay of 5
seconds.
When the generator engine is started, a check for proper
output voltage build up will be performed.
If some condition impedes normal voltage creation, such
as frost crystals or dust/dirt prevent a good electrical
connection, the start sequence will be interrupted so that
a cleaning cycle of the internal electrical connections can
be attempted.
The cleaning cycle is an extended "Warming Up" period
which lasts for several minutes while the normal
generator voltage output is determined to be low. During
this cycle, the generator controller will display the
"Warming Up" on the display screen.
If the cleaning cycle fails to clear the obstruction, the
generator controller display will show the "Under Voltage"
message.
After several minutes, the alarm message can be
cleared, and a restart of the generator attempted.
If the problem persists, make no further attempts to start.
Contact an independent authorized service dealer.

Load Transfer

The transfer of load when the generator is running is
dependent upon the operating mode:
Shutting Generator Down While
Under Load
IMPORTANT NOTE: To turn the generator off during
utility outages to perform maintenance, or conserve fuel,
follow these steps:
To turn the generator OFF (while running in
AUTO and online):
Turn the main utility disconnect OFF.
1.
Turn the main line circuit breaker (MLCB) on the
2.
generator to OFF (OPEN).
Turn the generator OFF.
3.

To turn the generator back ON:

Put the generator back into AUTO and allow to
1.
start and warm-up for a few minutes.
Set the MLCB on the generator to ON.
2.
The system will now be operating in automatic mode.
The main utility disconnect can be turned ON (CLOSED).
To shut the unit OFF, this complete process must be
repeated.
Owner's Manual for 60 Hz Air-cooled Generators