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.
Best Practice: Never disconnect the DC wire connectors under load. Ensure that no
current is flowing in the DC wires prior to disconnecting. If necessary, use an opaque
covering to cover the PV module prior to disconnecting the PV module. 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 AC and DC connectors on the cabling are rated as a disconnect only
when used with an Enphase Microinverter.
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. Make sure AC breakers and disconnects are closed.
2. Check the connection to the utility grid and verify that the utility voltage are within allowable
ranges shown in the Technical Data section on page 26 of this manual.
3. Verify that AC line voltage at all solar power circuit breakers at the load center and subpanels
is within the ranges shown in the following table.
4. Verify that AC line voltage at the 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
5. Using an Enphase disconnect tool, disconnect the AC cable for the microinverter in question
from the Engage Cable.
6. Verify that utility power is present at the microinverter by measuring line to line and line to
neutral at the Engage Cable connector.
7. Visually check that the AC branch circuit connections (Engage Cable and AC connections)
are properly seated. Reseat if necessary. Check also for damage, such as rodent damage.
8. 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.
9. Disconnect and re-connect the DC PV module connectors. The Status LED of each
microinverter will blink green six times to indicate normal start-up operation soon (less than
one minute) after DC power is applied. The LED subsequently resumes normal operation if
the Grid is present. See page 21 for normal LED operation.
10. Attach an ammeter clamp to one conductor of the DC cables from the PV module to measure
microinverter current. This will be under one Amp if AC is disconnected.
22
211 to 264 VAC
106 to 132 VAC L1, L2, L3 to neutral
 2013 Enphase Energy Inc.
M215 Installation and Operation
208 Volt AC, Three Phase
L1 to L2 to L3 183 to 229 VAC
106 to 132 VAC
141-00012 Rev 05