APsystems YC500A/I Installation/User Manual
21
Troubleshooting
Troubleshooting a non-operating APsystems Microinverter
There are two possible overall areas of trouble:
A. The Microinverter itself may be having problems.
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 Microinverter:
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 APsystems 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 LED flashes.
3.
Check the AC branch circuit interconnection between all the
microinverters. Verify each inverter is energized by the utility grid
as described in the previous step.
4.
Make sure that any AC breaker are functioning properly and are closed.
5.
Check the DC connections between the microinverter and the PV module.
6.
Verify the PV module DC voltage is within the allowable range shown
in the Technical Data of this manual.
7.
If the problem persists, please call APsystems Customer Support.
WARNING:
Do not attempt to repair the APsystems microinverter.
If troubleshooting methods fail, please return the microinverter to
your distributor for replacement.