APsystems YC1000-3 Installation/User Manual
15
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
Three (3) short green blinks, when DC power is first applied to the microinverter, indicates
a successful microinverter start up. It is important to understand that this “start up”
sequence occurs once the first module is connected to the microinvert and is successfully
generating DC power. The“start up” sequence does NOT reoccur as additional modules are
connected to the same microinverter.
Operation LED
Flashing Slow Green (10 sec. gap) - Producing power and communicating with ECU
Flashing Fast Green (2 sec. gap) - Producing power and not communicating with ECU over
60 minutes
Flashing Red - Not producing power
Steady Red - Electrode assembly ground fault protection
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.
Only qualified personnel should directly handle the APsystems microinverter.
1
Never disconnect the DC wire connectors under load. Ensure that no current is
flowing in the DC wires prior to disconnecting. An opaque covering may be used
to cover the module prior to disconnecting the module.
2
Always disconnect AC power before disconnecting the PV module wires from the
APsystems microinverter.
3
The APsystems microinverter is powered by PV module DC power. Make sure you
disconnect and reconnect the DC connections to watch for the three short LED
flashes indicating start up.
