Guardian 4389 Repair Manual page 23

GENERAL INFORMATION
THE SET EXERCISE SWITCH:
The air-cooled, prepackaged automatic standby gen-
erator will start and exercise once every seven (7)
days, on a day and at a time of day selected by the
owner or operator. The set exercise time switch is
provided to select the day and time of day for system
exercise.
See Section 5.1 ("The 7-Day Exercise Cycle") for
instructions on how to set exercise time.
DANGER: THE GENERATOR WILL CRANK
!
AND START WHEN THE SET EXERCISE TIME
SWITCH IS SET TO "ON". DO NOT ACTUATE
THE SWITCH TO "ON" UNTIL AFTER YOU
HAVE READ THE INSTRUCTIONS IN PART 5.
120 VAC GFCI OUTLET:
Some generator models are equipped with an exter-
nal, 15 amp, 120 volt, GFCI convenience outlet that is
located in the right rear of the generator enclosure.
When the generator is running, in the absence of utili-
ty power, this outlet may be used to power items out-
side the home such as lights or power tools. This out-
let may also be used when utility power is present by
running the generator in MANUAL mode. This oultlet
does not provide power if the generator is not run-
ning. This outlet is protected by a 7.5 amp circuit
breaker located in the generator control panel.
(Figure 1).
7.5 AMP FUSE:
Equipped on some models only. This fuse protects
the 12 VDC accessory socket against overload. If the
fuse element has melted open due to an overload,
the 12 VDC socket will not provide power to acces-
sories. Should fuse replacement become necessary,
use only an identical 7.5 amp replacement fuse.
PROTECTION SYSTEMS:
Unlike an automobile engine, the generator may have
to run for long periods of time with no operator pre-
sent to monitor engine conditions. For that reason,
the engine is equipped with the following systems that
protect it against potentially damaging conditions:
• Low Oil Pressure Sensor
• High Temperature Sensor
• Overcrank
• Overspeed
There are LED readouts on the control panel to notify
you that one of these faults has occurred. There is
also a "System Set" LED that is lit when all of the fol-
lowing conditions are true:
1. The AUTO-OFF-MANUAL switch is set to the AUTO position.
2. The NOT IN AUTO dip switch is set to the OFF position
on the control board.
3. No alarms are present.
PART 1
OPERATING INSTRUCTIONS
TO SELECT AUTOMATIC OPERATION
The following procedure applies only to those installa-
tions in which the air-cooled, prepackaged automatic
standby generator is installed in conjunction with a
prepackaged transfer switch. Prepackaged transfer
switches do not have an intelligence circuit of their
own. Automatic operation on prepackaged transfer
switch and generator combinations is controlled by
circuit board action.
To select automatic operation when a prepackaged
transfer switch is installed along with a prepackaged
home standby generator, proceed as follows:
1. Check that the prepackaged transfer switch main con-
tacts are at their UTILITY position, i.e., the load is con-
nected to the power supply. If necessary, manually actu-
ate the switch main contacts to their UTILITY source
side. See Part 5 of this manual, as appropriate, for
instructions.
2. Check that utility source voltage is available to transfer
switch terminal lugs N1 and N2 (2-pole, 1-phase trans-
fer switches).
3. Set the generator AUTO-OFF-MANUAL switch to its
AUTO position.
4. Actuate the generator main line circuit breaker to its "On"
or "Closed" position. With the preceding Steps 1 through
4 completed, a dropout in utility supply voltage below a
preset level will result in automatic generator cranking
and start-up. Following startup, the prepackaged transfer
switch will be actuated to its "Standby" source side, i.e.,
loads powered by the standby generator.
MANUAL TRANSFER TO "STANDBY" AND
MANUAL STARTUP
To transfer electrical loads to the "Standby" (genera-
tor) source and start the generator manually, proceed
as follows:
1. On the generator panel, set the AUTO-OFF-MANUAL
switch to OFF.
2. On the generator, set the main line circuit breaker to it's
OFF or "Open" position.
3. Turn OFF the
power supply to the transfer switch, using whatever means
provided (such as a utility source line circuit breaker).
4. Manually actuate the transfer switch main contacts to
their "Standby" position, i.e., loads connected to the
"Standby" power source side.
NOTE: For instructions on manual operation of
prepackaged transfer switches, see Part 5.
5. On the generator panel, set the AUTO-OFF-MANUAL
switch to MANUAL. The engine should crank and start.
SECTION 1.6
Page 21