Other Faults; Troubleshoot An Inoperable Microinverter - enphase IQ7 Installation And Operation Manual

• Click the serial number of the affected microinverter.
• Click "Reset DC Resistance Low - Power Off Sensor".
• The system displays, "A DC Resistance Low-Power Off reset task was issued on [date and time] for
this microinverter and is still pending".
Method 2: Use Enphase Installer App to clear the condition
On the list of detected microinverters, a green dot or red square appears to the left of each microinverter
serial number. A green dot indicates that the status is OK. A red square indicates an event for that
microinverter.
• Tap the to the left of the serial number to view details for a microinverter event.
•
If the microinverter status shows that there is an active "DC Resistance Low – Power Off" condition,
tap the to send the clear message to the affected microinverter. The app then indicates that a
clear message was sent.

Other faults

All other faults are reported to the IQ
Manual at enphase.com/support

Troubleshoot an inoperable microinverter

Follow the steps to troubleshoot an inoperable microinverter:
WARNING: Risk of electric shock. Always de-energize the AC branch circuit before servicing. Never
disconnect the DC connectors under load.
WARNING: The Enphase microinverters are powered by DC power from the PV modules. Make sure
you disconnect the DC connections and reconnect the DC power and then watch for the solid green
about six seconds after connection to DC power.
A. Make sure AC breakers and disconnects are closed.
B. Check the connection to the utility grid and verify that the utility voltage is within allowable ranges.
C. Verify that AC line voltages at all solar power circuit breakers at the load centre and subpanels are
within the ranges shown in the following table.
D. Verify that the AC line voltage at the junction box for each AC branch circuit at the site is within
range:
23
IQ7+/IQ7X/IQ7A Microinverters Installation and Operation Manual
. Refer to the Enphase IQ
Gateway
for troubleshooting procedures.
© 2023 Enphase Energy Inc. All rights reserved.
Installation and Operation
Gateway
August 2023
USM-00003-1.0