Troubleshooting And Maintenance; Led Status Indications And Error Reporting; Troubleshoot An Inoperable Microinverter; Disconnect Microinverters From Pv Modules - Envertech EVT560 User Manual

8.Troubleshooting and Maintenance

Adhere to all the safety measures described throughout this manual. If the PV
system does not operate correctly, the following troubleshooting measures
can be applied by qualified personnel.
WARNING
Do not attempt to repair the Envertech microinverter.It contains
!
no user-serviceable parts. If the microinverter fails, contact your
direct supplier or Envertech customer service to obtain an RMA
(return merchandise authorization) number and start the
replacement process.
8.1 LED Status Indications and Error Report
LED Startup:
The LED of each microinverter blinks red for a while at the beginning, and then blinks green
to indicate normal start-up approximately 10 seconds after DC power is applied. If the LED
blinks red after DC power is on , it indicates a failure during the start-up.
Post-Startup LED Indications:
Check LED status to confirm the present situation.
Flashing Green: It indicates normal operation.
Flashing Red:
1. If red light flashes every 2 or 3 seconds, it indicates that the microinverter is waiting for sun
or prepare to produce energy.
2. If red light flashes continuously, it indicates that the microinverter is not operating normally.
The microinverter does not detect that the utility grid is within operable voltage/frequency
range. The microinverter cannot produce power until this is solved.

8.2 Troubleshoot an Inoperable Microinverter

To troubleshoot an inoperable microinverter, follow the steps in the order shown below.
WARNING: Be aware that only qualified personnel should troubleshoot the PV array or the
Envertech microinverter.
Best Practice: Please do not disconnect DC connection while the system is working. Ensure
that no current is flowing in the DC wires prior to disconnecting. If necessary, use an opaqueto
cover the PV module prior to disconnecting the PV module. Always disconnect AC power
before disconnecting the PV module from the Envertech microinverter. Disconnecting AC
connectors of the microinverters is also a means of cutting off AC power.
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WARNING: The AC and DC connectors on the cabling are rated as a disconnecting point only
when used with an Envertech microinverter.
WARNING: Envertech microinverters are powered by DC power from the PV modules.
Please disconnect and reconnect DC power to check the LED blinks 1 minute after DC is
applied.
1. Make sure AC breakers are on.
2. Check the connection to the utility grid and verify that the grid voltage is within allowable
ranges shown in the Technical Data section.
3. Verify that AC voltage at all solar power circuit breakers of the load centers are within the
ranges shown in the following table.
4. Verify that AC line voltage at the junction box for each AC branch circuit is within the ranges
required by local grid standards.
Single-Phase 230 VAC
L to N 180 to 265VAC
5. Confirm if the microinverter side is connected to the grid by measuring the voltage from AC
line to line and line to neutral.
6. Visually check if AC branch circuit connection is correctly done. Reinstall if
necessary.Check also for damage, such as rodent damage.
7. Make sure that all circuit breakers are off.
8. Disconnect and re-connect the PV modules' DC connectors with microinverters. The LED
status of each microinverter will blink green to indicate normal start-up operation soon after
DC power is applied (less than one minute).
9. Attach an ammeter clamp to one conducting wire of the DC cables from the PV module to
measure the microinverter's current. This will be under 1 Amp if AC is disconnected.
10. Check the DC connection between the microinverter and the PV module. The connection
may need to be tightened or reseated. If the connection is worn out or damaged, it needs
replacement.
11. Verify with your utility company that grid frequency is within the regulated range.
8.3

Disconnect Microinverters from PV Modules

If your problems are still unsolved with the steps above, please contact Envertech tech
support through www.envertec.com. If Envertech approves the replacement, please take off
the microinverter according to the following instructions. In order to ensure the disconnection
between the microinverter and the PV Module will not be done while the microinverter is at
working status, , please strictly follow the steps below.
1. Turn off AC branch circuit breaker.
2. Disconnect the microinverters in the following procedure:
Pull the AC connectors of both sides of the microinverters in the opposite direction with
appropriate force.
Three-Phase 230 VAC
L1 to L2 to L3 310 to 460VAC
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