Envertech EVT1200 - Disconnect Microinverters from PV Modules; LED Status Indications and Error Reporting; Troubleshoot an Inoperable Microinverter; 8 Troubleshooting and Maintenance

LED Start-up：
The LED of each microinverter blinks red 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 rstly, it indicates a failure during the start-up.
Post Start-up LED Indications:
Check LED status to conrm the present situation.
Flashing Green：It indicates normal operation.
Flashing Red:
1.If red light ashes every 2 or 3 seconds, it indicates that the microinverter is waiting for sun or
prepare to produce energy.
2.If red light ashes 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 qualied 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 owing in the DC wires prior to disconnecting. If necessary, use an opaque 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 microinvert-
ers is also a means of cutting o AC power.
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
qualied personnel.
8.Troubleshooting and Maintenance
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.
!
WARNING
8.1 LED Status Indications and Error Report
16
15
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 on the page 5 of the manual.
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.
5. Conrm 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 on-grid circuit breakers are o.
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 o the microin-
verter 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 o 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 appropri-
ate force.
Single-Phase 230 VAC
L to N 180 to 265 VAC L1 to L2 to L3 310 to 460 VAC
Three-Phase 230 VAC