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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.
23
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. Make sure you disconnect the DC connections and reconnect DC power and
then watch for the solid green about six seconds after connection to DC power.
A. Make sure AC breakers and disconnects are closed.
B. Check the connection to the utility grid and verify that the utility voltage is within allowable
ranges.
C. 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.
D. Verify that AC line voltage at the junction box for each AC branch circuit is within the ranges
shown in the following table:
240 Volt AC, Single Phase
L1 to L2
211 to 264 VAC
L1, L2 to ground
106 to 132 VAC
208 Volt AC, Single Phase
L1 to L2
183 to 229 VAC
L1, L2 to ground
106 to 132 VAC
E. Using an Enphase disconnect tool, disconnect the AC cable for the microinverter in question
from the Enphase Q Cable.
F. Verify that utility power is present at the microinverter by measuring line to line and line to
ground at the Enphase Q Cable connector.
G. Visually check that the AC branch circuit connections (Enphase Q Cable and AC
connections) are properly seated. Reseat if necessary. Check also for damage, such as
rodent damage.
H. Make sure that any upstream AC disconnects, as well as the dedicated circuit breakers for
each AC branch circuit, are functioning properly and are closed.
I. Disconnect and re-connect the Enphase DC connectors. The status LED of each
microinverter will light solid green a few seconds after connection to DC power and then blink
green six times to indicate normal start-up operation about two minutes after connecting to
DC power. The LED subsequently resumes normal operation if the grid is present. See page
38 for normal LED operation.
J. Attach an ammeter clamp to one conductor of the DC cables from the PV module to measure
microinverter current. This will be under one amp if AC is disconnected.
K. Verify the PV module DC voltage is within the allowable range shown in “Specifications” on
page 6 of this manual.
Installation and Operation Manual
2020 Enphase Energy Inc. All rights reserved.
24
L. Following the steps in
Remove and Replace a Microinverter
, remove the PV panel from the
roof, and swap out the microinverter with one from a known good, adjacent AC module. If
after checking Enlighten periodically (this may take up to 30 minutes), the problem moves to
the adjacent module, this indicates that the PV module isn’t functioning correctly. If it stays in
place, the problem is with the original microinverter. Contact
Enphase Customer Support
for
help in reading the microinverter data and for help in obtaining a replacement microinverter, if
needed.
M. Check the DC connections between the microinverter and the PV module. The connection
may need to be tightened or reseated. If the connection is worn or damaged, it may need
replacement.
N. Verify with your utility that line frequency is within range.
O. If the problem persists, contact Customer Support at
enphase.com/en-us/support/contact.
Remove and Replace a Microinverter
If problems remain after following the troubleshooting steps listed previously, contact Enphase at
enphase.com/en-us/support/contact.
If Enphase authorizes a replacement, follow the steps below. To
ensure the microinverter is not disconnected from the PV modules under load, follow the disconnection
steps in the order shown:
A. De-energize the AC branch circuit breaker.
B. Enphase AC connectors are tool-removable only. To disconnect the microinverter from the
Enphase Q Cable, insert the disconnect tool and remove the connector.
C. Remove the AC Module from the roof per manufacturer instructions.
D. Once on the ground, disconnect the PV module DC connector from the microinverter using the
Enphase disconnect tool.
E. Press each of the four clips to free the microinverter.
F. Snap new replacement microinverter into place.
G. Connect the PV Module DC connectors to the microinverter.
H. Scan the new serial number.
NOTE:
The serial number of the replacement microinverter will different from the serial
number on the AC Module frame.
I. Bring the AC Module back onto the roof or other mounting location.
J. Connect the AC Module AC connector and DC Connector to the Q Cable.
K. Energize the AC branch circuit breaker and verify operation of the replacement microinverter by
checking the Status LED on the connector side of the microinverter.
