Installation manual

Safety, Installation, and Operations Manual

Power Unlocked by Design

Troubleshooting

Follow all the safety measures described throughout this manual. Qualied 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 Solaria® PowerXT

-R-AC Module; 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 INDICATES

Flashing green

Normal operation. AC grid function is normal there is communication with the Envoy.

Flashing orange

The AC grid is normal but there is no communication with the Envoy.

Flashing red

The AC grid is either not present or not within specication.

SOLID RED

There is an active “DC Resistance Low, Power Off” condition or “GFDI” fault. To reset, refer to “DC

Resistance Low – Power Off Condition” below.

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 rst applied to the microinverter indicate a failure during microinverter startup.

DC Resistance Low – Power Off Condition

For all IQ Microinverter for ACM 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 Envoy 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 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 Envoy 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 Energy customer 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 sensor

reset if the cause of the failure is still present. If the condition persists, contact your installer.