Technical data

Envoy Installation and Operation

Troubleshooting

The following sections describe possible problems and solutions. For information on system status and

event messages, see “Event Messages” on page 43. For more extensive information, refer to

Troubleshooting an Enphase Installation at http://www.enphase.com/downloads.

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.

Signal strength is acceptable if three to five bars are displayed and all devices are accounted for. One to

two bars may not be sufficient for consistent communication. Zero bars means that the Envoy needs to

be relocated, or it means that one or more electrical appliances are causing interference. Troubleshoot

power line communication issues as described in the following.

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

This 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 and the PV module voltage being too low for the microinverter to power up. To

troubleshoot the issue:

 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 (AC mains) as possible. This

ensures that the Envoy receives the strongest possible signal from each microinverter.

 Try unplugging any other device that may be 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.

Issue: Envoy Displays Fewer than Three Bars

Follow the procedure (previous) for “Issue: The Microinverter Count is Lower than the Number of

Installed Units”.

Level: [ ]

Devices: 25