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INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO BLK-G6+ / AC – Q CELLS
INSTALLATION AND OPERATION MANUAL SOLAR MODULES Q.PEAK DUO BLK-G6+ / AC – Q CELLS
Installation and Operation Manual
2020 Enphase Energy Inc. All rights reserved.
21
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 LED indications are described in Step 9, see page 38.
LED Operation
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 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.
Method 1: Clear this Error Using Enlighten
A. Log in to Enlighten and access the system.
B. Click the
Events
tab. The next screen shows a current “DC Resistance Low - Power Off”
condition for the system.
C. Click
DC Resistance Low - Power Off
.
D. Where “n” is the number of affected devices, click
n devices (show details).
E. Click the serial number of the affected microinverter.
F. Click
Reset DC Resistance Low - Power Off Sensor
.
Installation and Operation Manual
2020 Enphase Energy Inc. All rights reserved.
22
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 Installer Toolkit to Clear the Condition
Follow the instructions in the
Enphase IQ Envoy
Installation and Operation Manual
at
enphase.com/support
to clear this condition.
Other Faults
All other faults are reported to the Envoy. Refer to the
Enphase IQ Envoy Installation and Operation
Manual
at
enphase.com/support
for troubleshooting procedures.
