Disconnecting A Microinverter; Removing And Replacing A Microinverter - enphase IQ8MC Installation And Operation Manual

indicate normal start-up operation about two minutes after connecting to DC power. The LED
subsequently resumes normal operation if the grid is present. Refer to
J. Connect a clamp meter (set to DC mode) to one of the conductors of the DC cables from the PV
module to measure microinverter current. This will be under 1 A if the AC is disconnected.
K. Verify the PV module DC voltage is within the allowable range shown in "Specifications". Refer to the
Enphase compatibility calculator at
to verify PV module electrical compatibility with the microinverter.
L. Swap DC leads with a known good, adjacent PV module. After checking the Enphase Installer Portal
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
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 electricity network operator or with a multi-meter measuring frequency at the point
of supply that the line frequency is within range. If the problem persists, contact Enphase Support at
https:/ /enphase.com/contact/support

Disconnecting a microinverter

If problems remain after following the troubleshooting steps listed previously, contact Enphase Support
at https:/ /enphase.com/contact/support. 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. IQ Cable AC connectors are tool-removable only. To disconnect the microinverter from the IQ
Cable, insert an IQ Disconnect Tool and remove the connector.
C. Cover the PV module with an opaque cover.
D. Using a clamp meter set to DC mode, verify there is no current flowing in the DC cables 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. Most clamp meters must be zeroed first, as they tend
to drift with time.
E. Disconnect the PV module DC cable connectors from the microinverter using an 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.

Removing and replacing a microinverter

If problems remain after following the troubleshooting steps listed previously, contact Enphase Support at
https:/ /enphase.com/contact/support. If Enphase authorizes a replacement, make sure the microinverter is
not disconnected from the PV modules under load and follow the disconnection steps in the order shown:
23
IQ8MC, IQ8AC, and IQ8HC Installation and Operation Manual
https:/ /enphase.com/en-au/installers/microinverters/calculator
Enphase Support for help in reading the microinverter data and
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"LED operation".
November 2023
USM-00006-2.0