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Figure 2.5 – Voltage Adjustment Potentiometer
3.1
USING THE AUTO/OFF/
MANUAL SWITCH (FIGURE 3.1)
3.1.1
"AUTO" POSITION
Selecting this switch position activates fully automatic system
operation. It also allows the unit to automatically start and exercise
the engine every seven days with the setting of the exercise timer
(see the Setting the Exercise Timer section).
3.1.2
"OFF" POSITION
This switch position shuts down the engine. This position also
prevents automatic operation.
Figure 3.1 – Generator Control Panel
CONTROL AND INFORMATION CENTER
AUTO.
OFF
MAN.
SYSTEM FUSE
15A
SET
EXERCISE
ASSY: 0F8418/0F8419
TIME
Turn to
adjust voltage.
SYSTEM SET
LOW BATTERY
LOW OIL
HIGH TEMP
OVER SPEED
NO RPM SENSE IF FLASHING
OVER CRANK
FLASHING GREEN LED=
NO UTILITY SENSE
5 FLASHING RED LEDS=
EXERCISER NOT SET
3.1.3
"MANUAL" POSITION
Set the switch to MANUAL to crank and start the engine. Transfer
to standby power will not occur unless there is a utility failure.
With the switch set to AUTO, the engine may
crank and start at any time without warning.
Such automatic starting normally occurs
when utility power source voltage drops
below a preset level or during the normal
exercise cycle. To prevent possible injury
that might be caused by such sudden starts,
always set the switch to OFF and remove the
fuses before working on or around the gen-
erator or transfer switch. Then, place a "DO
NOT OPERATE" tag on the generator panel
and on the transfer switch.
3.1.4
CHOKE OPERATION
1.
990 engines have an electric choke in the air box that is auto-
matically controlled by the electronic control board.
2.
530 engines have an electric choke on the divider panel air
inlet hose that is automatically controlled by the electronic
control board.
3.
410 engines do not have a choke.
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 3.2).
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.
Operation
15
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