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Troubleshooting an Enphase System 

 

 2014 Enphase Energy Inc. 

August 2014 

44 

Best Practices 

Installation sequence 

Enphase considers following sequence of steps to be a best practice that reduces installation delays. 

1.  Register the System 

2.  Connect the Envoy Communications Gateway 

3.  Position the Enphase Engage Cable 

4.  Attach the Microinverters to the PV Racking 

5.  Dress the Cable 

6.  Connect the Microinverters 

7.  Terminate the Unused End of the Cable 

8.  Connect the Cable to the AC Junction Box 

9.  Complete the Installation Map 

10.  Connect the PV Modules 

11.  Energize the System 

12.  Use the Envoy to Complete System Setup 

13.  Build Array in Enlighten 

 

Care of the solar array 

How do I clean the solar array?  

Visually inspect the array to check for dust, debris, leaves, and other soiling. If cleaning is needed, follow 

the module manufacturer’s i

nstructions for cleaning or contact a local professional to schedule a cleaning. 

  

How do I maintain the solar array?  

Installers may want to conduct an annual check of the integrity of mechanical and electrical connections. 
An electrician can verify that the electrical connections are intact and working efficiently. 

Many installers suggest that homeowners visually inspect the modules (panels), especially after storms 
and in areas prone to hail and high winds. An inspection from the ground (use binoculars, if needed) is 
usually sufficient. 

At the array, get voltage readings from individual modules to confirm maximum performance and check 
for problems not visible from the ground. For example, inspect the seals around the individual module 
frames. 

Installers can also check mechanical connections, perform a re-torque of all electrical connections, 
confirm proper voltage and performance, and log cumulative data from the microinverters to keep and 
compare performance records for the system. 

 

Will a grid-tied solar array provide power during a power outage?  

Grid-tied arrays cannot provide electrical power during electrical power outages. Safety requirements 
dictate that grid-tied microinverters stop exporting power in the event of grid power loss.  

 

Содержание D380

Страница 1: ...Troubleshooting an Enphase System 2014 Enphase Energy Inc August 2014 1 Installer s Guide to Troubleshooting an Enphase System ...

Страница 2: ...vision reception which can be determined by turning the equipment off and on you are encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and the receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the deale...

Страница 3: ...e 17 LCD shows a valid IP but also shows Web 17 The router or DSL modem at the site has only one Ethernet port 17 Internet service is not available on site 18 Are my power line communication bridges working 19 Issue Internet Traffic is Slower After Installing a Bridge 19 Asoka PL9650 19 Asoka PL9660 Q1 19 ReadyNet EN200 19 Tenda P200 20 The Envoy cannot get a Web even though all premises networkin...

Страница 4: ...ule 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 Gate...

Страница 5: ... Use extreme caution and follow instructions carefully WARNING This indicates a situation where failure to follow instructions may result in burn injury NOTE This indicates information particularly important for optimal system operation Follow instructions closely Safety Instructions General Safety CAUTION Before installing or using the Enphase Microinverter read all instructions and cautionary ma...

Страница 6: ... prior to installing the PV modules Microinverter Safety WARNING Risk of Skin Burn The body of the Enphase Microinverter is the heat sink Under normal operating conditions the temperature is 15 C above ambient but under extreme conditions the microinverter can reach a temperature of 80 C To reduce risk of burns use caution when working with microinverters WARNING Risk of electric shock Risk of fir...

Страница 7: ...n the Engage Cable drop connectors to be sure that the cable matches the electrical utility service at the site Use 208 VAC Engage Cable at sites with three phase service or use 240 VAC Engage Cable at sites with single phase service NOTE There are two release holes in the drop connector on the cable These are not for mounting but are used to disconnect the connector Keep these release holes clear...

Страница 8: ...mation refer to http www enphase com support Troubleshooting areas covered in this document include Envoy and Communications Issues Microinverter PV Module Issues Messages and Alerts Best Practices Use the troubleshooting table on page 9 to find information on a problem according to category Production issues Envoy not reporting Microinverter not reporting General troubleshooting ...

Страница 9: ... 30 Other Things to Check 30 Envoy not reporting Envoy not Reporting 40 Gateway Failure 40 LCD displays Envoy Failure 12 LCD periodically shows Web for minutes or hours at a time 17 LCD shows a good IP but also shows Web 17 LCD shows a non routable self assigned IP address and also shows Web 15 The Envoy cannot get a Web even though all premises networking is intact 20 The Envoy is using a static ...

Страница 10: ... one Ethernet port and it is being used 17 The Envoy is in a circuit on the primary load center the solar circuits are on a downstream subpanel 24 The Envoy is slowing down other Internet traffic 19 The Microinverter LEDs are flashing orange 28 The Microinverter LEDs are flashing red 28 The Microinverter LEDs are not lit 28 There is an event or alert message on the system 32 This is a Line side Ta...

Страница 11: ...A return merchandise authorization number and start the replacement process Envoy Issues A physical Ethernet connection is not practical at the site The location for the Envoy yields a good signal strength between the Envoy and the Microinverters over the power lines but it is remote from the router An Ethernet cable from the broadband router to this spot is not practical Try these solutions Use a...

Страница 12: ... initiate the upgrade LCD displays Envoy Failure This message displays after the Envoy has tried unsuccessfully three times to initialize This may happen when the Envoy has been moved and its initialization process interrupted 1 Unplug the Envoy from the electrical outlet and then plug it in again Leave the Envoy in place for at least 15 minutes 2 If it continues to display Envoy Failure or if it ...

Страница 13: ...nclosures impede wireless communication Stucco and plaster wall construction may contain metal mesh which can affect wireless range If you cannot see your router or access point in the list on the Envoy or cannot maintain a connection relocate the Envoy to be closer to your router or access point If you remove the wireless adapter wait about 15 seconds before re inserting it Issue How Set Up Wi Fi...

Страница 14: ...cast may be blocked If so enter the SSID name and password If your network is not blocked and not listed click Re Scan to refresh the list of networks Status messages appear during the connection process including Connection Test and Confirmation h Click Join Network when displayed After joining the network displays in bold in the list of available networks i Disconnect the Ethernet cable Within t...

Страница 15: ...e rear of Envoy next to the LAN port is the Envoy network port light lit If so the Envoy is waiting for a response from Enlighten and will show Web soon If not reseat connections or try another CAT5 cable 2 Did the Envoy previously have an Internet connection at this site a If so what has changed Is it a new router or ISP Was there a power outage b If yes to any of these remove power from all unit...

Страница 16: ... rule of Allow all outbound traffic but disallow all inbound traffic This allows you to view any website but prevents unsolicited Internet traffic from coming into the premises via the router The Envoy initiates outbound connections to Internet servers Such connections may be restricted by firewall rules set up on the site s broadband router Broadband routers typically allow all outbound connectio...

Страница 17: ...the router instructions Failure to reserve the static IP address on the router will result in duplicate IP addresses and intermittent Internet connection problems with the Envoy For more information on how to use the Envoy Interface refer to the Envoy Installation and Operation Manual at http www enphase com support LCD periodically shows Web for minutes or hours at a time If the Envoy LCD intermi...

Страница 18: ...lation and Operation Manual at http www enphase com support Internet service is not available on site Consider buying an air card or hot spot There are some cases where this is the only Internet connectivity option for the site Air cards are also called EVDO or CDMA cards and typically provided by Sprint Verizon or AT T Purchase an air card compatible router e g Cradlepoint MBR 95 Plug the air car...

Страница 19: ...f bridge you have Asoka PL9650 1 Verify that both adapters are plugged in to an outlet and that one adapter is connected via Ethernet cable to the router while the other is connected via Ethernet cable to the Envoy 2 Change the password for your pair of bridges so that neighboring devices can no longer gain access to the Internet through your bridge Use Asoka s free Windows only configuration soft...

Страница 20: ...pter one press and hold the Reset Pair button on adapter two for two to three seconds then release it The power LED starts flashing 4 The Power and PLC LEDs on both adapters display a solid light to indicate that an encrypted private network is successfully created The Envoy cannot get a Web even though all premises networking is intact If you have gone through all appropriate troubleshooting exer...

Страница 21: ...ide of the Envoy communicates with the Internet using a standard Ethernet network cable plugged into your broadband router At power up the Envoy performs a power line communication check to determine the strength of the signal between the microinverters and the Envoy This check does not assess Internet communications During power up the Envoy performs a communication check A few minutes after powe...

Страница 22: ...AC adapters laptop power cord heavy rotating motors e g fans refrigerators freezers water pumps workshop equipment e g drill press table saw wood routers planers CFLs Compact fluorescent lights with failed ballasts anywhere in the home electronic pest deterrents GFI outlets some brands of arc fault protected outlets arc fault breaker Determine the source of the interfering load by isolating the En...

Страница 23: ...rs Check for the following conditions Are the solar circuit breakers in the ON position For the Envoy to communicate with the microinverters the circuit breakers for the solar wiring must be in the ON position at the load center Are the PV modules installed and connected PV modules power the microinverters and microinverters cannot communicate unless powered 6 Not all the microinverters are detect...

Страница 24: ...o identify which circuit has the interfering load or loads 1 Turn off all circuit breakers except those for the PV array and for the Envoy 2 Verify that the Envoy and microinverters are communicating 3 Turn on one additional circuit breaker and wait 10 minutes to see if there is any interference 4 If not turn on another circuit breaker and check again After completing these steps to find out which...

Страница 25: ...olate each Envoy into a separate communication domain especially for large scale projects Use transformers or aftermarket filters to isolate communication domains In a large scale project each sub system or communication domain consists of modules microinverters cables branch circuit breakers a microinverter subpanel and a filter A filter prevents power line communication signals from one Envoy co...

Страница 26: ... of ratings available allows maximum flexibility in your design choices Refer to the commercial planning tools at http www enphase com support for more information For assistance with large system commercial design requiring multiple Envoy devices contact Enphase Field Applications Engineering for a design review How to Get Training on Enphase Power Line Communication For training on Enphase power...

Страница 27: ...t AC breaker is not turned on Solid Failed microinverter start up Post Startup LED Indications Use a handheld mirror to view indicator lights on the undersides of the microinverters LED states are LED color State Meaning Green Flashing Normal operation The microinverter is receiving messages from the Envoy and senses that the utility grid is within voltage frequency specifications Orange Flashing ...

Страница 28: ...e flashing lights indicate that the microinverters are producing power but not communicating with the Envoy 1 Is there an Envoy plugged in and operating at the site If so what does the Communication Check show This is likely a communications issue See Power Line Communication Issues between the Envoy Microinverters on page 21 If not the microinverters will continue to flash orange until an Envoy i...

Страница 29: ... icon Use the controls at the base of the screen to pause replay and change the speed of the animation playback If the periods of low production are consistent and happen at the same time of day then shading is likely the cause 2 Refer to Messages and Alerts on page 33 for other possible causes of low production One unit shows 0W of production but adjacent units are productive The microinverter is...

Страница 30: ...our array configuration If the problem moves with the PV module then you can conclude that the PV module is faulty About Open Circuit Voltage Measuring open circuit voltage on the PV module does not conclusively confirm a PV module fault For example excessive resistance limits current flow and is not be apparent until the PV module is connected since there is no current flow at open circuit In thi...

Страница 31: ...al number has not yet been detected see Microinverters are not detected or power line communication level is low or poor on page 22 View the PV module production history To view production history for a PV module refer to Run a report to view production history on page 31 or View module production history on page 32 Run a report to view production history The following system wide reports are avai...

Страница 32: ...r production of a module in 5 minute increments View module production history 1 In the View tab click the module A status message displays 2 Click the graph icon 1 Click an Energy or Power range from the drop down menu It is useful to select the history of DC Voltage and DC Current for the module in question because this can show a date when one or the other varied from historical patterns There ...

Страница 33: ...quency Out of Range events persist troubleshoot as follows Although ACFOOR events can happen because of an actual frequency out of spec condition these events more likely to occur because of either a poorly shaped AC waveform or excessive THD Total Harmonic Distortion emanating from the utility service This type of error rarely affects just one unit and usually indicates an AC service issue Along ...

Страница 34: ... 183 to 229 VAC L1 L2 to neutral 106 to 132 VAC L1 L2 L3 to neutral 106 to 132 VAC An ACVOOR condition should correct itself as there are often periodic variations in Utility voltage If the condition persists troubleshoot as follows ACVOOR in an entire branch or multiple branches Checks 1 Measure voltages for L L and L N for all phase conductors at the service entrance PCC at each Enphase branch c...

Страница 35: ...e breaker is undersized the branch may experience nuisance tripping at peak production times If the breaker is oversized the branch may have been damaged with too much current flow through the microinverters 6 Verify that the service entrance power is not coming from a 240 VAC DELTA or 240 VAC STINGER secondary transformer 7 Make sure that the site does not have undersized conductors either to the...

Страница 36: ...ed Enphase branch circuits Something as simple as a wire terminated on a circuit breaker that is not screwed down tightly can cause ACVOOR on a given branch circuit An AC pigtail is defective or its AC connector or one of the microinverters on the branch s AC connector is damaged or defective If for example on a branch circuit the first three units are fine but the remaining 8 or 9 units on the br...

Страница 37: ...sor inside the microinverter not the ambient temperature For more information see the Enphase Technical Brief on temperature at http www enphase com support DC Resistance Low Power Off A DC Resistance Low Power Off event occurs only with the M250 Microinverter and some models of the M215 Microinverter and is indicated with a solid red status LED on the microinverter The LED remains red and the Env...

Страница 38: ...rols NOTE Do not check the box in the Select column 2 Click the serial number of the unit displaying DC Resistance Low Power Off The Control Flags screen displays CAUTION Do not select the reboot and cmd alert control flags unless recommended by Enphase The functions are reboot reboots the inverter cmd alert clears a condition flag for a command sent 3 In the clear dc resistance low menu click the...

Страница 39: ...inverter To check DC input measurements to a microinverter see Check DC measurements under One unit shows 0W of production but adjacent units are productive on page 29 The polarity is reversed If the unit shows zero production does the site use adaptors or jumpers between the PV module and the microinverter Verify by measuring the PV modules VOC Open Circuit Voltage and inspect the positive and ne...

Страница 40: ...sistance Low If the solar installer verifies that the connected PV module is working this event can indicate that the microinverter needs to be replaced Envoy not Reporting An Envoy not Reporting event is raised when the Internet connection is experiencing a problem If the Envoy LCD displays Web then the Envoy is not currently communicating with the Enlighten servers The Internet service may be do...

Страница 41: ...Envoy is required to send the clear gfi message to clear the condition If the condition does not clear after you perform the following procedure contact Enphase Energy customer support at support enphaseenergy com To send the clear gfi message to a microinverter 1 From the Administration menu choose Device Conditions and Controls NOTE Do not check the box in the Select column 2 Click on the serial...

Страница 42: ...d require a connection to the utility Verify that the solar circuit breakers are on at the load center If all breakers are on the condition should clear itself If Grid Gone events repeatedly occur on one microinverter or only on portions of a branch call Enphase Customer Support for assistance What is a Utility Interactive inverter The NEC National Electric Code defines this as An inverter intende...

Страница 43: ...ce interfering noise on the power lines If several microinverters are reporting this condition you may need to relocate the Envoy to another electrical outlet to improve communication signal strength For further troubleshooting steps see Microinverters are not detected or power line communication level is low or poor on page 22 Over Temperature See Critical Temperature on page 37 Zigbee Device Fai...

Страница 44: ...olar array Installers may want to conduct an annual check of the integrity of mechanical and electrical connections An electrician can verify that the electrical connections are intact and working efficiently Many installers suggest that homeowners visually inspect the modules panels especially after storms and in areas prone to hail and high winds An inspection from the ground use binoculars if n...

Страница 45: ...than other roof surfaces and the modules are usually installed in a south facing direction If snow days are likely then factor snow days into the system s projected production Solar modules can tolerate rough weather Most are designed to withstand inch hail at 120 miles per hour and they are also built to stand up to direct lightning strikes Can I add solar panels to the solar power system later Y...

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