PVI
23TL
&
PVI
28TL
Installation
and
Operation
Manual
PVI
Series
Inverters
DOCR
‐
070365
‐
E
Page
47
of
57
11.0
Product
Maintenance
Regular
maintenance
helps
extend
product
lifetime
and
performance.
11.1
Check
the
Electrical
Connection
Check
all
the
cable
connections
once
every
6
months,
by
performing
the
following
steps:
1.
Turn
off
inverter
DC
disconnect.
2.
Turn
off
inverter
AC
disconnect.
3.
Lock
out
all
DC
and
AC
sources
to
the
inverter.
4.
Verify
absence
of
DC
and
AC
voltages
at
the
wiring
box.
5.
Check
for
loose
or
untightened
cables;
follow
torque
and
safety
instructions
in
the
manual.
6.
Check
for
cable
damage,
especially
whether
the
cable
surface
is
scratched
or
smooth.
Repair
or
replace
the
cables
if
necessary.
11.2
Clean
the
Air
Vent
Filter
On
average,
it
is
recommended
to
check
the
air
vent
of
the
fans
once
every
6
months.
Do
so
by
performing
the
following
steps:
1.
Turn
off
inverter
DC
disconnect.
2.
Turn
off
inverter
AC
disconnect.
3.
Lock
out
all
DC
and
AC
sources
to
the
inverter.
4.
Verify
absence
of
DC
and
AC
voltages
at
the
wiring
box.
5.
Use
Philips
Screw
driver
to
remove
Vent
covers.
6.
Clean
vents
using
dry
cloth.
7.
Return
Screws
(torque
=
10in
‐
lbs).
Figure
11.1
–
Fan
Vent
Locations