Troubleshooting An Inoperable Microinverter - enphase M215 Installation And Operation Manual

Troubleshooting 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. Use an opaque covering to cover the PV
module prior to disconnecting the PV module.
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 one minute after DC is applied.
1. Check the connection to the utility grid and verify the utility voltage and frequency are within
allowable ranges shown in the Technical Data section on page 25 of this manual.
2. Verify that AC line voltage at the electrical utility connection and at the AC junction box for each
AC branch circuit are within the ranges are shown in the following table:
240 Volt AC Split Phase
L1 to L2
L1, L2 to neutral
3. Verify utility power 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 one minute 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 energized by the utility grid.
6. Make sure that any upstream AC disconnects, 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 25 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.
22
211 to 264 VAC
106 to 132 VAC
Copyright  2012 Enphase Energy
M215 Installation and Operation
208 Volt AC 3 Phase
L1 to L2 to L3
L1, L2, L3 to neutral
183 to 229 VAC
106 to 132 VAC
141-00012 Rev 04