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Troubleshooting
Follow all the safety measures described throughout this manual. Follow the troubleshooting procedures
in this section if the PV system does not operate correctly.
WARNING: Risk of electric shock. Do not attempt to repair the Enphase Microinverter; it
contains no user-serviceable parts. If it fails, contact Enphase customer support to obtain
an RMA (return merchandise authorisation) number and start the replacement process.
Status LED Indications and Error Reporting
Startup LED Operation
LED color
State
Green
Solid
Flashing Transition to post start up state
Red
Flashing No grid present (AC breaker is not turned on)
Solid
The status LED on the underside of each microinverter lights green about six
seconds after DC power is applied. It remains lit solid for two minutes,
followed by six green blinks. After that, red blinks indicate that no grid is
present if the system is not yet energized.
Six short red blinks after DC power is first applied to the microinverter
indicate a failure during microinverter startup.
Post-Startup LED Indications
Use a handheld mirror to view indicator lights on the undersides of the microinverters. LED states are:
LED
State
color
Green
Flashing Normal operation. The microinverter is receiving messages from the Envoy
Orange
Flashing Not receiving messages from the Envoy, but is otherwise operating normally.
Red
Flashing Failed to produce power and not operating normally. The microinverter does
Solid
27
Normal startup
Failed microinverter start up
and senses that the utility grid is within voltage/frequency specifications.
The microinverter senses that the utility grid is within voltage/frequency
specifications.
not sense that the utility grid is within voltage/frequency specifications. The
microinverter cannot produce power until this is resolved. See "Troubleshoot
an Inoperable Microinverter" on page 28.
Fault requiring intervention. For C250, this indicates a "DC Resistance Low –
Power Off" fault. Troubleshoot as described in the following sections.
2015 Enphase Energy Inc. All rights reserved.
C250 System Installation and Operation
Meaning
Meaning
LED on
underside
of micro-
inverter
141-00025 Rev 03
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