Troubleshooting; Status Led Indications And Error Reporting; Led Operation; Dc Resistance Low - Power Off Condition - enphase IQ7 Installation And Operation Manual

NOTE: When the utility requires a profile other than the profile resident on the microinverter, you
must select an appropriate grid profile for your installation. You can set the grid profile through
the Enphase App, during system registration, or through the Enphase Installer App at any time.
You must have an Enphase IQ Gateway to set or change the grid profile. For more information on
setting or changing the grid profile, refer to the Enphase IQ Gateway Installation and Operation
Manual at enphase.com/support.

Troubleshooting

Follow all the safety measures described throughout this manual. Qualified personnel can use the following
troubleshooting steps if the PV system does not operate correctly.
WARNING: Risk of electric shock. Do not attempt to repair the Enphase microinverter; it contains
no user-serviceable parts. If it fails, contact Enphase customer service to obtain an RMA (return
merchandise authorization) number and start the replacement process.

Status LED indications and error reporting

The following section describes LED indications.

LED operation

LED color
Flashing green
Flashing orange
Flashing red
Solid red
The status LED on each microinverter lights green about six seconds after DC power is applied. It remains lit
solid for two minutes, followed by six green blinks. After that, red blinks indicate that no grid is present if the
system is not yet energized.
Any short red blinks after DC power are first applied to the microinverter indicate a failure during
microinverter startup.
DC Resistance Low – Power Off condition
For all IQ Microinverter AC Module models, a solid red status LED when DC power has been cycled indicates
the microinverter has detected a DC Resistance Low-Power Off event. The LED will remain red, and the fault
will continue to be reported by the IQ Gateway until the error has been cleared.
An insulation resistance (IR) sensor in the microinverter measures the resistance between the positive and
negative PV inputs to the ground. If either resistance drops below a threshold, the microinverter stops power
production and raises this condition. This may indicate defective module insulation, defective wiring or
connectors, moisture ingress, or a similar problem. Although the cause may be temporary, this microinverter
condition persists until the sensor is manually reset.
An IQ Gateway is required to clear this condition. The condition clears on operator command unless its cause
is still present.
21
Indicates
Normal operation. AC grid function is normal there is communication with the IQ
Gateway.
The AC grid is normal but there is no communication with the IQ Gateway.
The AC grid is either not present or not within specification.
There is an active "DC Resistance Low, Power Off" condition. To reset, see
Resistance Low–Power Off condition.
© 2023 Enphase Energy Inc. All rights reserved.
IQ Microinverters for AC Module applications
DC
June 2023
USM-00001-1.0