Installation
and
Operation
Manual
(Rev
A)
PVI
50
‐
100KW
Series
Inverters
DOCR
‐
070233
Page
77
of
92
A
harsh
environment
is
defined
as
any
of
the
following
conditions:
Excessive
temperature
either
hot
or
cold
In
a
desert
area
with
sand
or
other
debris
constantly
in
contact
with
the
inverter
In
an
area
with
excessive
pollen
or
dust
Indoors
if
located
in
a
manufacturing
area
with
airborne
particles
Coastal
regions
exposed
to
salt
water
7.4
Intake
Louver
Vent
Cleaning
WARNING:
The
intake
louver
vent
can
be
cleaned
only
when
the
inverter
is
off,
both
DC
and
AC
Disconnect
switches
off
and
completely
locked
and
tagged
out.
Absence
of
dangerous
voltages
must
be
verified
by
qualified
personnel
before
performing
any
service.
Intake
louver
vent
cleaning
is
recommended
at
the
intervals
specified
in
Section
7.3.
Consider
cleaning
intake
louver
vent
during
the
early
morning
or
late
evening
so
little
or
no
energy
generation
is
lost.
Method
1:
Remove
the
shroud
by
removing
all
Philips
Pan
Head
#2
machine
screws
around
the
shroud
(sides
and
top
only,
do
not
remove
bottom
screws),
and
remove
the
shroud.
Without
removing
the
vent,
use
a
powerful
vacuum
and
clean
entire
louver
vent/screen.
Method
2:
Remove
the
shroud
by
removing
all
Philips
Pan
Head
#2
machine
screws
around
the
shroud
(sides
and
top),
and
remove
the
shroud.
Next
remove
the
remaining
bottom
screws
holding
the
louver
vent
onto
the
inverter.
Use
compressed
air
from
the
back
(insect
screen)
side
of
the
louver
vent/screen
unit
to
remove
all
debris.
Re
‐
assemble
putting
all
screws
in
LOOSELY
first
and
then
tighten
snug
(do
not
over
‐
tighten).
7.5
Opening
Main
Enclosure,
DC
Disconnect
Switch,
and
AC
Disconnect
Switch
Normally
the
main
enclosure,
DC,
or
AC
disconnect
switches
will
not
have
to
be
opened
for
any
reason
by
the
user.
If
opening
the
unit
is
necessary
follow
these
guidelines:
WARNING:
The
inverter,
DC,
and
AC
Disconnect
switches
should
only
be
opened
up
by
authorized
and
qualified
service
personnel.
WARNING:
If
the
inverter
is
outdoors,
only
open
the
inverter,
DC,
and
AC
disconnect
switches
when
it
is
clear
and
dry
outside.
As
with
any
electrical
system
do
not
work
on
it
if
there
is
a
potential
of
an
electrical
storm.
WARNING:
Both
DC
and
AC
disconnect
switches
must
be
in
the
off
position
and
wait
60
seconds
after
the
LED
indicators
are
off
before
opening
as
electrolytic
capacitors
on
the
internal
DC
“bus”
are
discharging
during
this
time.