enphase M250 Troubleshooting Guide

Troubleshooting an Enphase System
 2014 Enphase Energy Inc. August 2014
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Microinverter and PV Module Issues .......................................................................................................... 27
Microinverter LEDs ......................................................................................................................... 27
Startup LED Operation .............................................................................................................................. 27
Post-Startup LED Indications..................................................................................................................... 27
The Microinverter LEDs are flashing red ................................................................................................... 28
The Microinverter LEDs are flashing orange ............................................................................................. 28
The Microinverter LEDs are not lit ............................................................................................................. 28
Power Production ........................................................................................................................... 28
The unit under review shows low production. ............................................................................................ 28
One unit shows 0W of production but adjacent units are productive ......................................................... 29
About Open-Circuit Voltage ....................................................................................................................... 30
Other Checks............................................................................................................................................. 30
The PV modules are dark and no production displays in Enlighten ........................................................... 31
Enlighten does not allow me to select the PV module ............................................................................... 31
View the PV module production history ..................................................................................................... 31
Run a report to view production history ..................................................................................................... 31
View module production history ................................................................................................................. 32
There is an event or alert message on the system .................................................................................... 32
Messages and Alerts ................................................................................................................................... 33
ACFOOR (AC Frequency Out of Range) ....................................................................................... 33
ACVOOR (AC Voltage Out of Range) ........................................................................................... 34
ACVOOR in an entire branch or multiple branches ................................................................................... 34
ACVOOR in only a few microinverters ....................................................................................................... 36
Critical Temperature ....................................................................................................................... 37
DC Resistance Low – Power Off ................................................................................................... 37
DC Too Low ................................................................................................................................... 39
DC Too High .................................................................................................................................. 40
Device Produced No Power ........................................................................................................... 40
Envoy not Reporting ....................................................................................................................... 40
Gateway Failure ............................................................................................................................. 40
GFI Tripped .................................................................................................................................... 41
Grid Gone ....................................................................................................................................... 42
Microinverter Failed to Report ........................................................................................................ 43
Over Temperature .......................................................................................................................... 43
Zigbee Device Failed to Report ..................................................................................................... 43
Zigbee USB Stick Removed .......................................................................................................... 43
Best Practices ............................................................................................................................................. 44
Installation sequence ..................................................................................................................... 44
Care of the solar array ................................................................................................................... 44
How do I clean the solar array? ................................................................................................................. 44
How do I maintain the solar array? ............................................................................................................ 44
Will a grid-tied solar array provide power during a power outage? ............................................................ 44
Will the array provide power during when it is snowing or hailing? ............................................................ 45
Can I add solar panels to the solar power system later? ........................................................................... 45
Other Questions? ...................................................................................................................................... 45

enphase M250 Specifications

General

Model	M250
Manufacturer	Enphase Energy
Efficiency	96.5%
Output Voltage	240 V
Operating Temperature Range	-40°C to +65°C
Maximum Output Current	1.04 A
CEC Efficiency	96.0%
Start-up Voltage	22 V
Output Frequency	60 Hz
Enclosure Rating	IP67
Weight	1.6 kg