enphase M250 Troubleshooting Manual
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- Installation and operation manual (42 pages) ,
- Quick install manual (7 pages) ,
- Manual (52 pages)
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Summary of Contents for enphase M250
- Page 1 Troubleshooting an Enphase System Installer’s Guide to Troubleshooting an Enphase System 2014 Enphase Energy Inc. August 2014...
- Page 2 Other Information Product information is subject to change without notice. All trademarks are recognized as the property of their respective owners. User documentation is updated frequently; Check the Enphase website (http://www.enphase.com/support) for the latest information. For warranty text, refer to http://www.enphase.com/warranty.
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Page 3: Table Of Contents
Multiple Envoys and Filtering ........................25 Using a Transformer to Isolate Communication Domains ................. 25 Using an Aftermarket Filter to Isolate Communication Domains..............26 How to Get Training on Enphase Power Line Communication ..............26 2014 Enphase Energy Inc. August 2014... - Page 4 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 2014 Enphase Energy Inc. August 2014...
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Page 5: Important Safety Information
Refer to product instructions. Safety and Advisory Symbols To reduce the risk of electric shock, and to ensure the safe installation and operation of the Enphase® Microinverter, the following safety symbols appear throughout this document to indicate dangerous conditions and important safety instructions. -
Page 6: Microinverter Safety
(return merchandise authorization) number and start the replacement process. Tampering with or opening the Enphase Microinverter will void the warranty. WARNING: Risk of Equipment Damage. The M215 and M250 may be paired only with 60-cell PV modules. WARNING: When pairing with M250 (M250-60-2LL-S22, S23, or S24) or M215 (M215-60-2LL-S22- IG, S23-IG, or S24-IG), the PV module DC conductors must be labeled “PV Wire”... -
Page 7: Engage Cable And Accessory Safety
NOTE: When looping the Engage Cable, do not form loops smaller than 4.75 in. (12 cm) in diameter. NOTE: If you need to remove a sealing cap, you must use the Enphase disconnect tool or a screwdriver. Sealing caps may not be reused. -
Page 8: Overview
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 2014 Enphase Energy Inc. August 2014... -
Page 9: Troubleshooting Topics
A physical Ethernet connection is not practical at this site Are my power line communication bridges working? Can I use a dial-up Internet connection with the Envoy? Enlighten will not allow me to select the panel 2014 Enphase Energy Inc. August 2014... - Page 10 Troubleshooting an Enphase System Topic Page How to get further training on Enphase power line communication How to identify an interfering load I would like to see my panel’s production history Internet service is not available on site LCD displays "Scanning Inhibited"...
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Page 11: Envoy And Communications Issues
Power Line Communication Issues between the Envoy & Microinverters 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... -
Page 12: Lcd Is Completely Blank
LCD displays "Scanning Inhibited" This message displays after an installer has used the Installer's Toolkit to provision the Envoy. Leave the Envoy in this condition for normal operation. If you need to re-enable scanning, contact Enphase Customer Support (support@enphaseenergy.com). 2014 Enphase Energy Inc. -
Page 13: Networking And Internet Issues
Troubleshooting an Enphase System Networking and Internet Issues The Enphase Envoy Communications Gateway operates much as another computer does. As such, many of the troubleshooting steps for the Envoy are the same as those for other computers at the site. - Page 14 Within two minutes, an updated IP address displays on the Envoy LCD screen, indicating that a wireless connection is established. Within a minute, the Envoy LCD screen displays +Web, indicating a successful connection to Enphase. 2014 Enphase Energy Inc. August 2014...
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Page 15: Lcd Shows A Non-Routable/Self-Assigned Ip Address And Shows "-Web
Verify connection. The Envoy requires connection to a router, with the CAT5 cable that came with the Envoy or by installing an Enphase Wireless Adapter (order WF-01 separately). b. Verify that the Envoy is connected to a broadband router. A switch or hub cannot be substituted for the router. - Page 16 Is there an “Envoy not Reporting” event in Enlighten? If so, see page 40. 3. If Enphase power line communication bridges are in use, check that all LEDs are either on or flashing as described in “Are my power line communication bridges working?” Try the following: a.
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Page 17: The Envoy Is Using A Static Ip And Cannot Get A Web Connection
The Envoy connects to these servers using their DNS names. If you add firewall rules for Envoy reporting, Enphase recommends using the DNS names rather than the underlying IP addresses as the IP addresses are subject to change without notice. -
Page 18: Internet Service Is Not Available On Site
LAN at the site. See Setup 2 below. After installing the air card, you can then install the Envoy as described in the Envoy Installation and Operation Manual at http://www.enphase.com/support. 2014 Enphase Energy Inc. August 2014... -
Page 19: Are My Power Line Communication Bridges Working
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. 2014 Enphase Energy Inc. August 2014... -
Page 20: Tenda P200
“+Web” condition and other computers in the LAN are able to get to the Internet, then it may be that the Envoy has a hardware or networking problem. Contact Enphase Customer Support. Can I use a dial-up Internet connection with the Envoy? No. -
Page 21: Power Line Communication Issues Between The Envoy & Microinverters
Power Line Communication Issues between the Envoy & Microinverters Enphase Microinverters use a power line transmission protocol at the site for communication with the Envoy. All electrical loads at the premises share this common collection of power lines and circuits, and terminate at the load center, the location of the circuit breakers. -
Page 22: Microinverters Are Not Detected, Or, Power Line Communication Level Is Low Or Poor
some brands of arc-fault protected outlets (arc-fault breaker) Determine the source of the interfering load by isolating the Enphase signal from other systems. The Enphase system transmits at 144kHz, and adequately filters X10 and other signals. but not all other systems adequately filter the Enphase signal. - Page 23 Press and hold the Envoy Menu button; after two seconds the Envoy menu displays. Continue to hold the Menu button; until the LCD window displays “Enable New Device Scan”, then release. 2014 Enphase Energy Inc. August 2014...
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Page 24: How To Identify An Interfering Load
In these cases, it is best to add an additional 5-Amp circuit breaker and then run an outlet off of that subpanel. Plug the Envoy into that outlet, so that it is close to the PV circuit breakers. 2014 Enphase Energy Inc. August 2014... -
Page 25: Power Line Communications With A Line-Side Tap (Or Supply-Side, Or Plc) Installation
Using a Transformer to Isolate Communication Domains Transformers provide excellent filtering between Enphase communication domains. A 480 V, 600 V, or medium voltage interconnection requires a transformer to step the voltage down to 208/120 Wye. If the project does not require transformers, or if a single, central transformer is selected, then you can filter Envoy communication domains with commercially available power line filters. -
Page 26: Using An Aftermarket Filter To Isolate Communication Domains
Applications Engineering for a design review. How to Get Training on Enphase Power Line Communication For training on Enphase power line communication, attend a free, one-hour training webinar on the Envoy. Find out more at http://enphase.com/support-north-america/webinars/. 2014 Enphase Energy Inc. -
Page 27: Microinverter And Pv Module Issues
. Troubleshoot as described in the following sections. Solid Fault requiring intervention. For M215-60-2LL-S22-IG, S23-IG, or S24-IG this indicates a “DC Resistance Low – Power Off” fault. (continued on next page) 2014 Enphase Energy Inc. August 2014... -
Page 28: The Microinverter Leds Are Flashing Red
PV module is connected to the appropriate DC lead on the microinverter. Power Production This section describes how to troubleshoot power production issues by using Enlighten Manager The unit under review shows low production. 1. Eliminate shading as a possible cause. 2014 Enphase Energy Inc. August 2014... -
Page 29: One Unit Shows 0W Of Production But Adjacent Units Are Productive
The microinverter is communicating, but not producing. Communication with no production may indicate a DC-side failure. Use Enlighten to view AC measurements for analysis. To view the AC measurements: 1. In the View tab, click the module. A status message displays. 2. Click the graph icon. 2014 Enphase Energy Inc. August 2014... -
Page 30: About Open-Circuit Voltage
Sometimes a microinverter reports zero DC voltage. In this case, measuring the open circuit voltage of the PV module will help identify a PV module that has failed. If the problem does not appear to be with the PV module, Enphase Energy Customer Support will assist you in further diagnosing the issue. -
Page 31: The Pv Modules Are Dark And No Production Displays In Enlighten
Per Module One Month Energy Production – Lists the monthly energy production by module (microinverter serial number) as well as total system production for the selected month. 2014 Enphase Energy Inc. August 2014... -
Page 32: View Module Production History
There is an event or alert message on the system There may be an event or alert associated with one, several or all of the devices in your system. If so, see “Messages and Alerts” on page 33. 2014 Enphase Energy Inc. August 2014... -
Page 33: Messages And Alerts
If power from the utility is disconnected, the utility-interactive inverter ceases to export power within two seconds. Anti-Islanding protects utility line workers and loads. 2014 Enphase Energy Inc. August 2014... -
Page 34: Acvoor (Ac Voltage Out Of Range)
1. Measure voltages for L-L and L-N for all phase conductors at the service entrance (PCC), at each Enphase branch circuit breaker, at each Enphase branch circuit junction box, at each Enphase branch circuit AC pigtail (if used in this installation), and at the last microinverter of each Enphase branch circuit. - Page 35 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 Enphase branch circuit or between the primary load center and the subpanel if a subpanel is installed.
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Page 36: Acvoor In Only A Few Microinverters
An incompatible AC disconnect between the circuit breaker and the AC pigtail of the PCU branch circuit. Faulty wiring, terminations, or circuit breakers only for those affected 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. -
Page 37: Critical Temperature
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 Envoy continues to report the fault until the error clears. - Page 38 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 set box. 2014 Enphase Energy Inc. August 2014...
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Page 39: Dc Too Low
PV module is not functioning correctly. If the problem stays in place, then the problem is with the microinverter. Contact Enphase Customer Support for help in reading the microinverter data and for help in obtaining a replacement microinverter if needed. -
Page 40: Dc Too High
Gateway Failure The Envoy has detected a software problem. To clear this message, unplug the Envoy from the electrical outlet and then plug it back in. Do this only once. If it returns to failure mode, contact Enphase Customer Support. -
Page 41: Gfi Tripped
If a microinverter registers a GFI Tripped condition, you can attempt to clear this condition through the Envoy Interface. An 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. -
Page 42: Grid Gone
The microinverter reports that power from the utility is no longer present or is out of voltage or frequency specification. In most cases, no action is required. Solar production resumes when conditions normalize. Enphase microinverters are utility interactive and require a connection to the utility. What is a “Utility Interactive” inverter? The NEC (National Electric Code) defines this as, “An inverter intended for use in parallel with an... -
Page 43: Microinverter Failed To Report
Zigbee USB Stick Removed The Envoy Communication Gateway no longer detects the presence of the ZigBee USB stick. Make sure that the ZigBee USB stick is fully seated in the Envoy USB port. 2014 Enphase Energy Inc. August 2014... -
Page 44: Best Practices
Troubleshooting an Enphase System 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. -
Page 45: Will The Array Provide Power During When It Is Snowing Or Hailing
Can I add solar panels to the solar power system later? Yes. Unlike arrays built with traditional string inverters, adding to the array is a simple procedure without a lot of design constraints. Other Questions? Contact Enphase Customer Support at support@enphaseenergy.com. 2014 Enphase Energy Inc. August 2014...
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Questions and answers
Yesterday, I noticed that all (10) of my Enphase microinverters are blinking with a yellow/red light. Upon checking my electricity production, I noticed that the system started generating less and less power over the last three months and today they are producing zero wattage. The system shows 240 V but 0.3 Amps. I would appreciate your assistance. Thank you.
When all Enphase M250 microinverters are blinking yellow/red and producing zero wattage, it indicates that the microinverters are not operating normally and cannot produce power because they do not detect the utility grid within the required voltage/frequency specifications. This is a solid fault that requires intervention. Possible causes include a "DC Resistance Low – Power Off" fault or a GFDI fault. Troubleshooting steps involve checking DC and AC voltages, ensuring the PV modules are correctly connected, and confirming that all circuit breakers are in the "ON" position.
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