Enphase IQ8 Install and Operation Manual

IQ8 / IQ8+ / IQ8M / IQ8A / IQ8H Micro Installation and Operation

E. Using an Enphase disconnect tool, disconnect the AC cable for the microinverter in question from the Enphase

IQ Cable.

F. Verify that utility power is present at the microinverter by measuring line to line and line to ground at the

Enphase IQ Cable connector.

G. Visually check that the AC branch circuit connections (Enphase IQ Cable and AC connections) are properly

seated. Reseat if necessary. Check also for damage, such as rodent damage.

H. 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.

I. Disconnect and re-connect the DC PV module connectors. The status LED of each microinverter will light solid

green a few seconds after connection to DC power and then blink green six times to indicate normal start-up

operation about two minutes after connecting to DC power. The LED subsequently resumes normal operation if

the grid is present. See page 24 for normal LED operation.

J. 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.

K. Verify the PV module DC voltage is within the allowable range shown in “Specifications” on page 33 of this

manual.

L. Swap DC leads with a known good, adjacent PV module. If after checking Enphase Installer Platform

periodically (this may take up to 30 minutes), the problem moves to the adjacent module, this indicates that the

PV module isn’t functioning correctly. If it stays in place, the problem is with the original microinverter. Contact

Enphase Customer Support for help in reading the microinverter data and for help in obtaining a replacement

microinverter, if needed.

M. Check the DC connections between the microinverter and the PV module. The connection may need to be

tightened or reseated. If the connection is worn or damaged, it may need replacement.

N. Verify with your utility that line frequency is within range.

O. If the problem persists, contact Customer Support at enphase.com/en-us/support/contact.

Disconnect a Microinverter

If problems remain after following the troubleshooting steps listed previously, contact Enphase at enphase.com/en-

us/support/contact. If Enphase authorizes a replacement, follow the steps below. To ensure the microinverter is not

disconnected from the PV modules under load, follow the disconnection steps in the order shown:

A. De-energize the AC branch circuit breaker.

B. Enphase AC connectors are tool-removable only. To disconnect the microinverter from the Enphase IQ Cable

insert the disconnect tool and remove the connector.

C. Cover the PV module with an opaque cover.

Using a clamp-on meter, verify there is no current flowing in the DC wires between the PV

module and the

microinverter. If current is still flowing, check that you have completed steps one and two above.

NOTE: Take care when measuring DC current as most clamp-on meters must be zeroed first and tend to

drift with time.

E. Disconnect the PV module DC wire connectors from the microinverter using the Enphase disconnect tool.

F. If present, loosen and/or remove any bonding hardware.

G. Remove the microinverter from the PV racking.

WARNING: Risk of electric shock. Risk of fire. Do not leave any connectors on the PV system disconnected

for an extended period. If you do not plan to replace the microinverter immediately, you must cover any

unused connector with a sealing cap.