APsystems YC500-A Installation/User Manual
9
WARNING:
Do not mount the microinverter in a location that allows
exposure to direct sunlight. Allow a minimum of 3/4” (1.5 cm.) between
the roof and the bottom of the microinverter to allow proper air flow.
NOTE
:
Connecting cables (steps 3-5) can be done in any order but DO
NOT energize the utility power grid until all the steps are completed.
Step 3 – Connecting APsystems microinverters to
the PV module
Connect the DC cables from the PV modules to the microinverter per the
diagram below:
Note:
When plugging in the DC cables, the microinverter should
immediately blink red then green three times. This will happen as
soon as the cables are plugged in and will show that the microinverter
is functioning correctly. This entire check function will start and end
within 5 seconds of plugging in the unit, so pay careful attention to
these lights when connecting the DC cables. This only occurs when DC
voltage is first applied. The LED will not flash when the second panel
is connected.
9
Figure 6
Photovoltaic panels
and microinverter DC
input cable connection
MC4 Connectors
APsystems YC500A/I Installation/User Manual
11
Installation Procedures
Step 4 - Ground the System
If you
already use grounding washers (WEEB)
to
ground the Microinverter
chassis
to
the
PV
module racking as described in Step
2,
skip this step.
Figure 9
Each
AP
systems Microinverter comes with a ground clamp that can
accommodate a single
#6
awg strand and
#4
awg solid conductor. Check
your local electrical code for grounding conductor sizing requirements.
Connect the grounding electrode conductor
to
the microinverter ground
clamp.
NOTE:
The
AC
output neutral is not bonded
to
ground inside the
microinverter.
Step 5 - Connecting APsystems Microinverters to the PV
Module
Connect the
DC
cables from the
PV
Modules
to
the Microinverter per the
diagram below:
NOTE:
When plugging in the
DC
cables, the Microinverter should
immediately blink green three times. This will happen as soon as
the cables are plugged in and will show that the Microinverter is
functioning correctly. This entire check function will start and end
within 5 seconds
of
plugging in the unit,
so
pay careful attention
to
these lights when connecting the
DC
cables.
A
B
Figure 10