Other Faults; Troubleshoot An Inoperable Microinverter - enphase IQ8 Installation And Operation Manual

•
Click Reset DC Resistance Low - Power Off Sensor.
•
The system displays that a DC Resistance Low-Power Off reset task was issued on [date and
time] for this microinverter and is still pending.
Method 2: Use the 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 the status OK. A red square indicates an event
for that microinverter.
• Tap
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
indicates that a clear message was sent.

Other faults

All other faults are reported to the gateway.

Troubleshoot an inoperable microinverter

To troubleshoot an inoperable microinverter, follow the steps in the order shown.
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.
Ensure you disconnect the DC connections, reconnect the DC power, and then watch for
the solid green about six seconds after connection to DC power.
A. Ensure AC breakers and disconnects are closed.
B. Check the connection to the utility grid and verify that the utility voltage is within allowable
ranges.
Verify that AC line voltages at all solar power circuit breakers at the load center and
subpanels are within the ranges shown in the following table:
C. Using an IQ Disconnect Tool, disconnect the AC cable for the microinverter in question from
the IQ Cable.
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Enphase IQ8, IQ8+, IQ8M, IQ8A, and IQ8H Microinverters
to send a clear message to the affected microinverter. The app then
240 VAC, single-phase
L1 to L2
L1, L2 to ground
208 VAC, single-phase
L1 to L2
L1, L2 to ground
© 2024 Enphase Energy Inc. All rights reserved.
211 to 264 VAC
106 to 132 VAC
183 to 229 VAC
106 to 132 VAC
January 2024
IOM-00068-1.0