9.
The
equipment
that
is
attached
to
the
iSeries
system,
such
as
workstations
and
printers,
must
be
attached
to
the
power
distribution
network
for
the
system
when
possible.
10.
Each
unit
in
the
iSeries
system
must
have
a
circuit
breaker
that
controls
only
the
ac
voltage
to
that
unit.
No
other
equipment
may
get
its
ac
voltage
from
the
same
circuit
breaker.
11.
Check
all
circuit
breakers
in
the
network
that
supply
ac
power
to
the
iSeries
system
as
follows:
v
Ensure
that
the
circuit
breakers
are
installed
tightly
in
the
power
panel
and
are
not
loose.
v
Feel
the
front
surface
of
each
circuit
breaker
to
detect
if
it
is
warm.
A
warm
circuit
breaker
may
be
caused
by:
–
The
circuit
breaker
that
is
not
installed
tightly
in
the
power
panel
–
The
contacts
on
the
circuit
breaker
that
is
not
making
a
good
electrical
connection
with
the
contacts
in
the
power
panel.
–
A
defective
circuit
breaker.
–
A
circuit
breaker
of
a
smaller
current
rating
than
the
current
load
which
is
going
through
it.
–
Devices
on
the
branch
circuit
which
are
using
more
current
than
their
rating.
12.
Equipment
that
uses
a
large
amount
of
current,
such
as:
Air
conditioners,
copiers,
and
FAX
machines,
should
not
receive
power
from
the
same
branch
circuits
as
the
system
or
its
workstations.
Also,
the
wiring
that
provides
ac
voltage
for
this
equipment
should
not
be
placed
in
the
same
conduit
as
the
ac
voltage
wiring
for
the
iSeries
system.
The
reason
for
this
is
that
this
equipment
generates
ac
noise
pulses.
These
pulses
can
get
into
the
ac
voltage
for
the
iSeries
system
and
cause
intermittent
problems.
13.
Measure
the
ac
voltage
to
each
unit
to
ensure
that
it
is
in
the
normal
range.
Is
the
voltage
outside
the
normal
range?
v
No
:
Continue
with
the
next
step.
v
Yes
:
Contact
the
customer
to
have
the
voltage
source
returned
to
within
the
normal
voltage
range.
14.
The
remainder
of
this
procedure
is
only
for
an
iSeries
system
that
is
attached
to
a
separately
derived
source.
Some
examples
of
separately
derived
sources
are
an
uninterruptable
power
supply,
a
motor
generator,
a
service
entrance
transformer,
and
a
system
power
module.
The
ac
voltage
system
must
meet
all
the
requirements
that
are
stated
in
this
procedure
and
also
all
of
the
following:
Notes:
a.
The
following
applies
to
an
uninterruptable
power
supply,
but
it
can
be
used
for
any
separately
derived
source.
b.
System
upgrades
must
not
exceed
the
power
requirements
of
your
derived
source.
The
uninterruptable
power
supply
must
be
able
to
supply
the
peak
repetitive
current
that
is
used
by
the
system
and
the
devices
that
attach
to
it.
The
uninterruptable
power
supply
can
be
used
over
its
maximum
capacity
if
it
has
a
low
peak
repetitive
current
specification,
and
the
uninterruptable
power
supply
is
already
fully
loaded.
Therefore,
a
de-rating
factor
for
the
uninterruptable
power
supply
must
be
calculated
to
allow
for
the
peak-repetitive
current
of
the
complete
system.
To
help
you
determine
the
de-rating
factor
for
an
uninterruptable
power
supply,
use
the
following:
Note:
The
peak-repetitive
current
is
different
from
the
″
surge
″
current
that
occurs
when
the
iSeries
system
is
powered
on.
The
de-rating
factor
equals
the
crest
factor
multiplied
by
the
RMS
load
current
divided
by
the
peak
load
current
where
the:
v
Crest
factor
is
the
peak-repetitive
current
rating
of
the
uninterruptable
power
supply
that
is
divided
by
the
RMS
current
rating
of
the
uninterruptable
power
supply.
If
you
do
not
know
the
crest
factor
of
the
uninterruptable
power
supply,
assume
that
it
is
1.414.
v
RMS
load
current
is
the
steady
state
RMS
current
of
the
iSeries
system
as
determined
by
the
power
profile.
Analyze
hardware
problems
113
Содержание iSeries Series
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