Troubleshooting; Power Line Communication Troubleshooting; Issue: The Microinverter Count Is Lower Than The Number Of Installed Units - enphase Envoy Installation And Operation Manual

Troubleshooting

The following sections describe possible problems and solutions. For information on system status and event
messages, see "Event Messages" on page 54. For more extensive information, refer to the Installer's
Guide to Troubleshooting an Enphase Installation at http://www.enphase.com/support.
WARNING: Do not attempt to repair the Enphase Envoy; it contains no user-serviceable
parts. Tampering with or opening the Envoy will void the warranty. If the Envoy fails, contact
Enphase customer support to obtain an RMA (return merchandise authorization) number
and start the replacement process.

Power Line Communication Troubleshooting

At power-up, the Envoy performs a "Communications
check". After a few minutes, it will display a number of
bars in the LCD screen. This value, from zero to five,
indicates the signal strength of the power line
communication between the Envoy and the
microinverters.
Any time the Envoy is restarted, it automatically performs a communications check. However, there may be
times when you need to manually initiate a check. To do this:
 Press and hold the Envoy menu button. Release it when the LCD window displays Enable
Communication Check. The check will run for 20 minutes.
 Note the number of bars shown in the Communications check.
A level of three to five bars is good. A number between one and two is not ideal. Zero bars means that you
need to run another device scan, the Envoy needs to be relocated, or that one or more electrical appliances
are causing interference. Troubleshoot power line communication issues as follows.

Issue: The Microinverter Count is Lower than the Number of Installed Units

The microinverter count is an indication of the number of online microinverters producing power, reporting in
to the Envoy, and not having any error conditions. If this number is lower than expected, it may indicate that
the Envoy is not done scanning/discovering the entire array. Alternatively, it may indicate that the Envoy is
having difficulty communicating over the power lines. It could also be a result of low light levels or that the PV
module voltage is too low for the microinverter to power up. To troubleshoot the issue:
 Check the Inventory screen on the Envoy local interface to view any microinverters not reporting
in to the Envoy or having any error conditions.
 Make sure that the Envoy is plugged directly into the wall and not into a power strip or surge
protector.
 Relocate your Envoy as close to the electrical service panel (load center) as possible. This ensures
that the Envoy receives the strongest possible signal from each microinverter.
 Unplug any other device that is sharing the outlet with the Envoy. Or, as an alternative, plug the
Envoy into a circuit that supports fewer electronic appliances. Appliances sharing a receptacle
with the Envoy may interfere with power line communication.
 If this problem occurs when light levels are low, try again during daylight hours.
29  2014 Enphase Energy Inc.
Envoy Installation and Operation
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