Automatic Transfer Operation; Sequence Of Automatic Operation - Home Depot 0H9681 El Manual Del Propietario

Operation
Set-up Procedure
1. Ensure Utility power is supplied to the Transfer Switch.
2. Remove the 7.5A Fuse from the Control Panel.
3. Wait ten (10) seconds.
4. Install the 7.5A Fuse.
5. Set the AUTO/OFF/MANUAL switch to AUTO.
6. All the LEDs on the Control Panel will begin to flash.
7. Press and hold the SET EXERCISE button for five (5) seconds.
8. Only the System Ready LED will remain on, the rest will stop
flashing.
9. The Generator will crank, start and run for twelve (12) min-
utes. It will NOT transfer during this time unless Utility is lost.
10. At the end of the Exercise period the Generator will shut down.
The exerciser will only work in the AUTO mode and will not work
unless this procedure is performed. The excercise time will
need to be reset every time the 12 volt battery is disconnected
and then reconnected, and/or when the fuse is removed.
3.2 AUTOMATIC TRANSFER
OPERATION
To select automatic operation, do the following:
1. Make sure the transfer switch main contacts are set to their
UTILITY position, i.e., loads connected to the utility power
source (Figure 3.1).
2. Be sure that normal UTILITY power source voltage is avail-
able to transfer switch terminal lugs N1 and N2 (Refer to the
Electrical Data section).
3. Set the generator's AUTO/OFF/MANUAL switch to AUTO.
4. Set the generator's main circuit breaker to its ON (or CLOSED)
position.
With the preceding steps complete, the generator will start auto-
matically when utility source voltage drops below a preset level.
After the unit starts, loads are transferred to the standby power
source. Refer to the Sequence of Automatic Operation section.
3.3 SEQUENCE OF AUTOMATIC
OPERATION
3.3.1 UTILITY FAILURE
Initial Conditions: Generator in Auto, ready to run, load being sup-
plied by utility source. When utility fails (below 65% of nominal),
a 10 second line interrupt delay time is started. If the utility is still
not present when the timer expires, the engine will crank and start.
Once started, a five (5) second engine warm-up timer will be initi-
ated. When the warm-up timer expires, the control will transfer the
load to the generator. If the utility power is restored (above 75% of
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.
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NOTE:
3.3.2 CRANKING
The system will control the cyclic cranking 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 three (3) second rests.
Choke Operation
The 432cc engines have a choke behind the air box that is auto-
matically controlled by the electronic control board.
Failure to Start
This is defined as any of the following occurrences during crank-
ing:
1. Not reaching starter dropout within the specified crank cycle.
Starter dropout is defined as four (4) cycles at 1,000 RPM.
2. Reaching starter dropout, but then not reaching 2200 RPM
within 15 seconds. In this case the control board will go into
a rest cycle for seven (7) seconds, then continue the rest of
the crank cycle.
During a rest cycle the start and fuel outputs are de-energized and
the magneto output is shorted to ground.
Cranking Conditions
The following notes apply during cranking cycle.
1. Starter motor will not engage within five (5) seconds of the
engine shutting down.
2. The fuel output will not be energized with the starter.
3. The starter and magneto outputs will be energized together.
4. Once the starter is energized the control board will begin look-
ing for engine rotation. If it does not see an RPM signal within
three (3) seconds it will shut down and latch out on RPM
sensor loss.
5. Once the control board sees an RPM signal, it will energize the
fuel solenoid and continue the crank sequence.
6. Starter motor will disengage when speed reaches starter
dropout.
7. If the generator does not reach 2200 RPM within 15 seconds,
re-crank cycle will occur.
8. If engine stops turning between starter dropout and 2200
RPM, the board will go into a rest cycle for seven (7) seconds
then re-crank (if additional crank cycles exist).
9. Once started, the generator will wait for a hold-off period
before starting to monitor oil pressure and oil temperature
(refer to the Alarm Messages section for hold-off times).
10. During Manual start cranking, if the Mode switch is moved
from the Manual position, the cranking stops immediately.
11. During Auto mode cranking, if the Utility returns, the cranking
cycle does NOT abort but continues until complete. Once the
engine starts, it will run for one (1) minute, then shut down.