Installation
and
Operation
Manual
(REV
H)
PVI
6500
/
PVI
7500
35
3
Commissioning
the
Inverter
and
PV
System
Ensure
that
the
inverter
is
mounted,
all
connections
are
made
and
you
are
ready
to
power
it
up
before
continuing
with
this
section.
NOTE:
Make
sure
all
tools,
parts,
etc.
are
removed
from
the
vicinity
of
the
inverter
before
turning
it
on.
WARNING:
Make
a
final
check
for
correctness
of
all
AC
and
DC
wiring
to
the
inverter
and
in
the
system.
NOTE:
With
the
PV
modules
connected
and
the
inverter
disconnect
still
in
the
off
position,
it
is
good
practice
to
check
PV
polarity
once
more
simply
by
carefully
using
a
600V,
DC
rated
CAT
III
digital
volt
meter
and
probing
the
positive
(+)
and
negative
(
‐
)
PV
connections
on
the
terminal
blocks
in
the
wiring
box.
Turning
on
the
inverter
for
the
first
time:
STOP!
CHECK
YOUR
WIRING:
WARNING!
EXTREME
SHOCK
AND
FIRE
HAZARD!
FAILURE
TO
FOLLOW
THE
FOLLOWING
PROCEDURE
CAN
RESULT
IN
SERIOUS
SHOCK,
FIRE
DAMAGE
AND
WILL
VOID
INVERTER
WARRANTY!
WARNING!
ARC
FLASH
HAZARD!
ALWAYS
WEAR
APPROPRIATE
PERSONAL
PROTECTIVE
GEAR
WHEN
WORKING
ON
ENERGIZED
CIRCUITS!
o
REMOVE
WIRING
BOX
COVER,
Watch
for
live
terminals
and
fuse
holders.
o
PV
STRING
FUSES
SHOULD
NOT
BE
INSTALLED
AT
THIS
POINT
(If
they
are
installed,
STOP!
and
see
the
section
“Replacing
PV
Fuses”
in
the
Maintenance
section
at
the
end
of
this
manual)
o
CHECK
DC
VOLTAGES
OF
ALL
STRINGS
USING
600V
DC
METER
MEASURED
VOLTAGES
SHOULD
BE
OPEN
CIRCUIT
VOLTAGE;
IF
THE
MEASURED
VOLTAGE
IS
AT
OR
CLOSE
TO
0.0V,
THEN
STOP!
AND
RECHECK
YOUR
WIRING
TO
ENSURE
THERE
IS
NOT
A
DEAD
SHORT.
o
CHECK
DC
POLARITY
OF
ALL
STRINGS
USING
600V
DC
METER
MEASURED
VOLTAGES
SHOULD
INDICATE
POSITIVE
READINGS
WHEN
THE
“RED”
PROBE
OF
YOUR
METER
IS
ON
THE
UNGROUNDED
TERMINAL
AND
THE
“BLACK”
PROBE
OF
YOUR
METER
IS
ON
THE
GROUNDED
TERMINAL
(except
for
positively
grounded
systems,
in
which
case
see
Appendix
D
at
the
end
of
this
manual).
IF
THE
MEASURED
VOLTAGES
INDICATE
A
NEGATIVE
POLARITY,
THEN
STOP!
AND
RECHECK
YOUR
WIRING
TO
ENSURE
THE
POLARITY
OF
THE
STRINGS
IS
CORRECT.
o
ONCE
THE
VOLTAGES
AND
POLARITIES
ARE
MEASURED
AND
CONFIRMED
TO
BE
CORRECT,
INSTALL
THE
PV
STRING
FUSES.
Unlock
and
turn
on
the
dedicated
2
‐
pole
circuit
240/208VAC
circuit
breaker
on
the
home/building
electrical
panel
(or
1
‐
pole
breaker
for
277VAC)
Unlock
and
turn
on
the
system
AC
disconnect
(if
the
system
is
equipped
with
additional
AC
disconnect)
Turn
on
the
DC/AC
disconnect
on
the
inverter.
Watch
the
LED
indicators
for
initialization
(all
three
LEDs
on)
and
LCD
messages.
