Status Led Indications And Error Reporting; Led Operation; Dc Resistance Low - Power Off Condition - enphase IQ8 Installation And Operation Manual

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 is first applied to the microinverter indicate a failure during
microinverter start-up.
DC Resistance Low – Power off condition
For all IQ Series 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 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.
If a microinverter registers a "DC Resistance Low - Power Off" condition, you can attempt to
clear this condition. If the condition does not clear after you perform the following procedure,
contact Enphase Support at enphase.com/en-us/support/contact.
There are two ways to send a clear message to the microinverter. Note that the condition will not
clear after the sensor reset if the cause of the failure is still present. If the condition persists, contact
your installer.
Method 1: Clear this error using the Enphase Installer Platform
•
Log in to the Enphase Installer Platform and access the system.
•
Click the Events tab. The next screen shows a current "DC Resistance Low - Power Off"
condition for the system.
•
Click DC Resistance Low - Power Off.
•
Where "n" is the number of affected devices, click n devices (show details).
•
Click the serial number of the affected microinverter.
26
Enphase IQ8, IQ8+, IQ8M, IQ8A, and IQ8H Microinverters
Indicates
Normal operation. AC grid function is normal, and 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 the specification.
There is an active "DC Resistance Low, Power Off Condition". To
reset, see "DC Resistance Low – Power Off Condition" below.
© 2024 Enphase Energy Inc. All rights reserved. January 2024
IOM-00068-1.0