Load Transfer; Shutting Generator Set Down While Under Load Or During A Mains Power (Utility) Outage - Generac Power Systems G007144 Owner's Manual

A check for proper output voltage buildup is performed
when the generator set engine is started.
If some condition impedes normal voltage creation, such
as frost crystals or dust/dirt preventing a good electrical
connection, the start sequence will be interrupted for a
cleaning cycle of the internal electrical connections.
The cleaning cycle is an extended warmup period which
lasts for several minutes as the normal generator set
voltage output is determined to be low. During this cycle,
the generator set controller will display "Warming Up" on
the display screen.
The generator set controller display will show "Under
Voltage" if the cleaning cycle fails to clear the obstruction.
After several minutes, the alarm message can be cleared
and the generator set restarted.
If the problem persists, make no further attempts to start.
Contact an IASD.

Load Transfer

Load transfer priorities when the generator set is running
depend upon the transfer switch design. Refer to the
transfer switch owner's manual.
Shutting Generator Set Down
While Under Load Or During A
Mains Power (Utility) Outage
Automatic start-up. Disconnect mains
power and render the equipment
inoperable before attempting repairs
or maintenance.
IMPORTANT NOTE: To avoid equipment damage, follow
these steps, in order, during mains power outages.
Shutdowns may be required during mains power outages
to perform routine maintenance or to conserve fuel.
To turn the generator set OFF:
1. Turn off the mains power supply to the transfer
switch using the means provided (such as a main
line utility breaker).
2. Set the main circuit breaker in the distribution panel
to Off (OPEN) to remove all loads from the
generator set.
3. To shut down the generator set:
– Allow the generator set to run for five minutes at
no load.
– After five minutes, use the emergency stop
button to shut down the generator set.
– Wait 15 minutes to allow the internal temperature
to stabilize.
Owner's Manual for 50 Hz Air-Cooled Generator Sets
NOTE: Failure to follow this procedure may expose
the user to hot surfaces. See
Section 1.
4. Open the lid and reset the emergency stop alarm
on the control panel.
5. Set the MLCB (generator disconnect) on the
generator set to OFF (OPEN).
6. Remove the 7.5A fuse from the control panel.
To turn the generator set back ON:
1. Install 7.5A fuse in control panel.
2. Verify the MLCB (generator disconnect) is OFF
(OPEN).
3. Press the AUTO mode button on the control panel.
4. Generator set will start and run. Allow generator
set to run and warm up for a few minutes.
5. Set the MLCB (generator disconnect) to ON
(CLOSED).
6. Close and lock the lid.
7. Set the main circuit breaker in the distribution panel
to ON (CLOSED).
8. Turn on the mains power supply to the transfer
switch using the means provided.
The system now operates in automatic mode.
ISO000191a
Operation
Hot Surfaces in
25