Disconnect A Microinverter - enphase IQ8 Installation And Operation Manual

D. Verify that utility power is present at the microinverter by measuring line to line and line to
ground at the IQ Cable connector.
E. Visually check that the AC branch circuit connections (IQ Cable and AC connections) are
properly seated. Reset if necessary. Check also for damage, such as rodent damage.
F. Ensure that any upstream AC disconnects, as well as the dedicated circuit breakers for each
AC branch circuit, are functioning properly and are closed.
G. 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 the
table on the previous page outlining LED indicators for normal operation.
H. Attach an ammeter clamp to one conductor of the DC cables from the PV module to measure
the microinverter current. This will be under one amp if the AC is disconnected.
I. Verify the PV module DC voltage is within the allowable range shown in the
this manual.
J. Swap DC leads with a known good, adjacent PV module. If, after checking the Enphase
Installer Platform periodically (this may take up to 30 minutes), the problem moves to the
adjacent module, this indicates that the PV module is not functioning correctly. If it stays in
place, the problem is with the original microinverter. Contact
reading the microinverter data and for help in obtaining a replacement microinverter, if
needed.
K. 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.
L. Verify with your utility that the line frequency is within range.
M. If the problem persists, contact Enphase Support at

Disconnect a microinverter

If problems remain after following the troubleshooting steps listed previously, contact Enphase
Support at enphase.com/en-us/support/contact.
these steps. 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. AC connectors are tool-removable only. To disconnect the microinverter from the IQ Cable,
insert the disconnect tool and remove the connector.
C. Cover the PV module with an opaque cover.
D. Using a clamp-on meter, verify there is no current flowing in the DC wires between the PV
module and the microinverter. If the 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.
28
Enphase IQ8, IQ8+, IQ8M, IQ8A, and IQ8H Microinverters
If Enphase authorizes a replacement, follow
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Enphase Support
enphase.com/en-us/support/contact.
Specifications in
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January 2024
IOM-00068-1.0