APS YC500A-MIW Installation/User Manual
15
WARNING:
The APS Microinverter is powered by PV module DC power.
AFTER disconnecting the DC power, when reconnecting the PV modules to
the Microinverter, be sure to watch for the three short LED flashes.
A non-operating APS Microinverter
There are two possible overall areas of trouble:
A.
The Microinverter itself may be having problems, or
B.
The Microinverter itself is working fine but it is having trouble
communicating with the ECU. The items below refer to Microinverter
issues, not communication issues (addressed in the ECU manual).
A quick way to tell whether the issue is the Microinverter or a
communication problem with the ECU:
1.
Diagnosing from the Micro-Inverter:
A red light – either blinking or
solid on the Microinverter, or no light at all. No light, or a red light,
means it is definitely a Microinverter problem.
2.
Diagnosing from the ECU:
a.
No-Data-Display:
This is probably a communication issue- not a
Microinverter problem.
b.
Problems with erratic display
: Data is displayed for some period
and then no data is displayed: most likely a communication issue.
c.
0 watts, or 2 watts
: Possibly a Microinverter problem
d.
Erratic data display
that is not coordinating with data displays
from other units: most likely a Microinverter problem.
TO TROUBLESHOOT A NON-OPERATING APS MICROINVERTER, FOLLOW
THE STEPS BELOW IN ORDER:
1
. Verify the utility voltage and frequency are within ranges shown in
the Technical Data section of this manual.
2.
Check the connection to the utility grid. Verify utility power is
present at the inverter in question by removing AC, then DC power.
Never disconnect the DC wires while the Microinverter is producing
power. Re-connect the DC module connectors and watch for three
short green LED flashes.
Troubleshoot a Non-operating APS Microinverter. . .
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