APsystems YC500-A Installation/User Manual
14
Troubleshooting
Qualified personnel can use the following troubleshooting steps if the
PV system does not operate correctly:
Status indications and error reporting
Start up LED
One quick red light followed by three short green blinks when DC
power is first applied to the microinverter indicates a successful
microinverter startup
Operation LED
Flashing Slow Green
(10 sec. gap) – Producing power and
communicating with ECU
Flashing Fast Green
(2 sec. gap) – Producing power but not
communicating with ECU
Flashing Red
– Not producing power
GFDI Error
A solid red LED indicates the microinverter has detected a DC
Voltage Ground Fault Detector Interrupter (GFDI) error in the
PV system. Unless the GFDI error has been cleared, the LED will
remain red and the ECU will keep reporting the fault.
After the ground fault error is fixed, follow the instructions in the
ECU Installation and Operation Manual to clear this GFDI error
reporting.
Other Faults
All other faults are reported to the ECU. Refer to the ECU
Installation and Operation Manual for a list of additional faults
and troubleshooting procedures.
WARNING:
Only qualified personnel should directly handle the
APsystems microinverter.
WARNING:
Never disconnect the DC wire connectors under
load. Ensure that no current is flowing in the DC wires prior to
disconnecting.
WARNING:
Always disconnect AC power before disconnecting the PV
module wires from the APsystems microinverter. Either disconnecting
by the appropriate
AC circuit breaker or unplugging the first AC
connector of the first microinverter in a branch circuit is suitable as a
means of disconnection.