Disconnect A Microinverter; Install A Replacement Microinverter - enphase IQ8MC Installation And Operation Manual

I. Connect a clamp meter to one of the conductors of the DC cables from the PV module to measure the
microinverter current. This will be under 1 A if the AC is disconnected.
J. Verify the PV module DC voltage is within the allowable range shown in "Specifications". Refer to the Enphase
compatibility calculator at:
electrical compatibility with the microinverter.
K. 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 Enphase Support
microinverter, if needed.
L. 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.
M. Verify with your utility that the line frequency is within range.
N. If the problem persists, contact Enphase Support at https://enphase.com/contact/support.

Disconnect a microinverter

If problems remain after following the troubleshooting steps listed previously, contact
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.
A. De-energize the AC branch circuit breaker.
B. IQ Cable AC connectors are tool-removable only. To disconnect the microinverter from the IQ Cable, insert
the IQ Disconnect Tool and remove the connector.
C. Cover the PV module with an opaque cover.
D. Using a clamp 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 A, B, and C above.
NOTE: Take care when measuring DC current, as most clamp meters must be zeroed first, as these tend to
drift with time.
E. Disconnect the PV module DC wire connectors from the microinverter using the IQ 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 an IQ Sealing Cap.

Install a replacement microinverter

A. When the replacement microinverter is available, verify that the AC branch circuit breaker is de-energized.
B. Mount the microinverter horizontally bracketed side up or vertically:
•
Always mount the microinverter under the PV module, protected from direct exposure to rain, sun,
and other harmful weather events. Allow a minimum of 1.9 cm (3/4 in) between the roof and the
microinverter. Also, allow 1.3 cm (1/2 in) between the back of the PV module and the top of the
microinverter.
28
IQ8MC/IQ8AC/IQ8HC Microinverters Installation and Operation Manual
https://enphase.com/installers/microinverters/calculator
for help in reading the microinverter data and for help in obtaining a replacement
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to verify PV module
Enphase Support. If
October 2023
USM-00008-1.0