19
Failure to Start
This is defined as any of the following o ccurrences during cr an k-
ing.
1.
N
ot r eaching star ter dropout within the specified crank cycle.
S
tar ter dropout is defi ned as four
(
4
)
cycles at 1,000
R
PM .
2.
R
eaching star ter dropout, but then not reaching 2200
R
PM
withi n 15 seconds. In this case the control board will go into
a rest cycle f or seven
(
7
)
seconds, then continue the r est of
the crank cycle.
D
uring a rest cycle the star t and fuel outputs are de-energized and
the
m
agneto output is shor ted t o ground.
Cranking Conditions
The following notes apply during cranking cycle.
1.
S
tar ter
m
ot or will not engage within five
(
5
)
seconds of the
engine shutting down.
2. The fuel output will not be energized with the star ter.
3. The star ter and
m
agneto outputs will be energized together.
4.
O
nce the star ter is ene rgized the control board will begin look-
ing for engine ro tation. If it does not see an
R
PM signal within
three
(
3
)
seconds it will shut down and latch out on
R
PM
sensor loss.
5.
O
nce the control board sees an
R
PM signal it will energize the
fuel solenoid, drive the throttle open and continu e the crank
sequence.
6.
S
tar ter
m
ot or will disengage when speed reaches star ter
dropout.
7. If the generator does not reach 2200
R
PM within 15 seconds,
re-crank cycle will occur.
8. If engine stops turning between star ter dropout and 2200
R
PM , the boa rd will go into a rest cycle for seven
(
7
)
seconds
then re-crank
(
i f additional crank cycles exist
)
.
9.
O
nce star ted, the generator will wait for a hold-off period
bef ore star ting to
m
onitor oil pressure and oil te
m
perature
(
refer to the Alar
m
Messages section for hold-off t i
m
es
)
.
10.
D
uring Manual star t cranking, if the Mode switch i s
m
oved
fro
m
the Manual position, t he cranking stops i
mm
edi ately.
11.
D
uring Auto
m
ode cra nking, if t he
U
tility returns, t he cranking
cycle does
N
O
T abort but continue s until co
m
plete.
O
nce the
engine star ts, it will run for one
(
1
)
m
inute, then shut down.
3.3.3 LOAD TRANSFER
The transfer of load when the generator is running is dependent
upon the operating
m
ode as follows:
1. Manual
W
ill not transfer to generator if util ity is present.•
W
ill transfer to generator if utilit y fails
(
below 70% of no
m
inal •
for 20 or 50 consecuti ve seconds.
W
ill transfer back when utility return s for 10 consecutive •
seconds. The engine will continue to run until re
m
oved fro
m
the Manual
m
ode.
2. Auto
W
ill star t and run if
U
tility fails for 10 consecutive seconds.•
W
ill star t a 20 to 50 second selectable engine war
m
-up •
ti
m
er.
W
ill not transfer if utility subsequently returns.•
W
ill transfer to generator if utility is still not present.•
W
ill transfer back to utility once utility returns
(
above 80% of •
no
m
inal
)
for 10 seconds.
W
ill transfer back to utility
(
IF available
)
if the generator is shut •
down for any reason
(
such as the switch is in t he
O
FF posi-
tion
)
or a shutdown alar
m
and the utility source is available.
After transfer, will shut down engine after one
(
1
)
m
inute •
c ool-down ti
m
e.
3. Exercise
W
ill not exercise if generator is already running in either Auto •
or Manual
m
ode.
D
uring exercise, the controller will only transfer if utility fails •
duri ng exercise for 10 seconds, and will switch to Auto
m
ode.
3.3.4 UTILITY RESTORED
Initial Condi tion :
G
enerator supplying power to custo
m
er load.
W
hen the utili ty returns
(
above 80% of no
m
inal
)
, a 10 second
return to utility ti
m
er will star t. At the co
m
pletion of this ti
m
er, if
the utility sup ply is still present and acceptable, the control will
transfer the load back to the utility and run the engine through a
one
(
1
)
m
inute cool down period and then shut down. If utility fails
duri ng this cool down period, the control will transfer load back
to the generator and continue t o run while
m
onitoring for utility to
return.
3.4 MANUAL TRANSFER OPERATION
3.4.1 TRANSFER TO GENERATOR POWER SOURCE
To star t the generator and activate the transfer switch
m
anually,
pro ceed as follows:
1.
S
et the generator’s A
U
T
O
/
O
FF/MA
N
U
A
L
switch to
O
FF.
2.
S
et the generator’s
m
ain circuit bre aker to its
O
FF
(
or
O
PE
N
)
position.
3. Turn
O
FF the utility power supply to the transfer switch
using the
m
eans provided
(
such as a utility
m
ain line circuit
breaker
)
.
DANGER
Do not attempt to activate the transfer swi tch
manually until all power voltage supplies to the
switch have been positively turned off. Failure to
turn off all power voltage supplies may result in
extremely hazardous and possibly fatal electri-
cal shock.
4.
U
se the
m
anual transfer ha ndle inside the transfer switch to
m
ove the
m
ain contacts to their
S
TA
N
D
BY posit ion, i.e., loads
c onnected to the standby power source
(
Figur e 3.3
)
.
Section 3 — Operation
Air-cooled Generators
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