Troubleshoot An Inoperable Microinverter - enphase M215 Installation And Operation Manual

Troubleshoot an Inoperable Microinverter

To troubleshoot an inoperable microinverter, follow the steps in the order shown.
WARNING: Be aware that only qualified personnel should troubleshoot the PV array or the
Enphase 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
Enphase Microinverter. The AC connector of the microinverter is suitable as a disconnecting
means.
WARNING: The Enphase Microinverters are powered by DC power from the PV modules.
Make sure you disconnect the DC connections and reconnect DC power to watch for the six
short LED blinks two minutes after DC is applied.
1. Check the connection to the electricity network and verify the utility voltage and frequency are
within allowable ranges shown in the Technical Data section on page 24 of this manual.
2. Verify that AC line voltage at the electrical distribution board or consumer unit and at the AC
junction box for each AC branch circuit are within the ranges are shown in the following table:
Single-phase service
L1 to neutral
3. Verify that power from the electricity network is present at the microinverter in question by removing
AC, then DC power. Never disconnect the DC wires while the microinverter is producing
power.
4. Re-connect the DC PV module connectors. The Status LED of each microinverter will blink green
six times to indicate normal start-up operation two minutes after DC power is applied.
5. Check the AC branch circuit between all the microinverters. As described in the previous step,
verify that all microinverters are energised by the electricity network.
6. Make sure that any upstream AC disconnects (or isolators), as well as the dedicated circuit
breakers for each AC branch circuit, are functioning properly and are closed.
7. Verify the PV module DC voltage is within the allowable range shown in the Technical Data section
on page 24 of this manual.
8. Check the DC connections between the microinverter and the PV module.
9. If the problem persists, contact Customer Support at support@enphase.com.
WARNING: Do not attempt to repair the Enphase Microinverter; it contains no user-serviceable
parts. If it fails, please contact Enphase customer service to obtain an RMA (return
merchandise authorisation) number and start the replacement process.
21
207 to 253 Vac
Copyright © 2012 Enphase Energy
M215 Installation and Operation
Three-phase service
L1 to L2 to L3
L1, L2, L3 to neutral
360 to 440 Vac
207 to 253 Vac
141-00021 Rev 01