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b
Device detection issues
If the Device Communications LED
of low light levels. If there isn't enough sunlight to power up the microin-
verters, they can't communicate with the IQ Gateway.
If there is sufficient daylight for the microinverters to power up, the issue
may be that the IQ Gateway is having difficulty communicating over the
power lines. To troubleshoot this issue:
• Check the Enphase Installer App mobile app to see the
non-communicating devices.
• Check that the circuit breaker(s) in the IQ Combiner 4C for the PV
array are in the "ON" position.
• Verify that the PV modules are connected to the microinverters.
• Verify the PV module DC voltage is within the allowable range for the
microinverter.
• For connection issues related to IQ Battery/IQ System Controller,
ensure you have performed Range test to ensure that all the devices
are in the communication range.
c
Power production issues
If the Power Production LED
App mobile app to see the non-producing microinverters:
• If no microinverters are producing power, there may be a grid or wiring
issue. First, verify that there is correct input voltage and frequency from
the utility. Next, check the breaker and wiring, starting at the load center.
• If all of the non-productive microinverters are on the same branch,
check the breaker and wiring starting at the junction box for the affected
branch.
• If only one or scattered microinverters are not producing power, first
check to see that the AC connectors are fully seated. Next, check that
each module is providing the required startup voltage for the
microinverter (22 V). A PV module that is failing or that is undersized
may not generate enough power for AC conversion.
Mounting Rail and Rivets
8
lights solid red, it may be a result
lights solid red, check the Enphase Installer
d
Internet connection issues
If you are using Wi-Fi and the Network Communications LED
or solid red:
• The WPS connection window may have timed out. Retry the connection steps.
• Ensure the broadband router is connected and operational by checking that
other devices at the site can access the network.
• Check for metal enclosures or obstructions that may be impeding wireless
communication.
• If you don't see your router/access point in the list on the IQ Gateway, or
cannot maintain a connection, you may need to add a wireless repeater to
extend the network range.
If you are using the Enphase Mobile Connect modem and the Network Com-
munications LED remains OFF or lights solid red, see Troubleshooting in the
Enphase Mobile Connect Installation Guide.
If you replace your router, configure the IQ Gateway Wi-Fi settings for the new
Wireless Network Name (SSID) and password, or use the WPS function de-
scribed in Installation Step 10.
e
Loss of AC to a single branch of microinverters
If a single branch of microinverters is not producing, it may indicate loss of AC
to the branch.
Use a multi-meter set to AC to test the breaker lugs. The result should be
around 240 VAC. If not, switch the breaker OFF and ON to reset.
f
Inoperable IQ Gateway (all LEDs off)
If the IQ Gateway is not receiving power, all LEDs will be OFF.
Use a multimeter set to AC to test line 1 on the IQ Gateway breaker to the AC
neutral busbar. The result should be around 120 VAC.
g
Inoperable IQ Gateway and no AC to branch
If a branch of microinverters is not producing and the IQ Gateway LEDs are
OFF. Test at the main lugs for L-L and L-N voltages. The results should be
around 240 VAC and 120 VAC respectively. If not, there may be a problem
with the wiring from the panel.
Enphase Mobile Connect Dimensions
remains OFF
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