Installation guide

Meikai ENERGY
Page 16 Copyright MeiKai ENERGY 2012 REV 1.0
 Grounding Fault
WARNING: Be aware that only qualified personnel should troubleshoot the
Micro-inverter.
WARNING: DO NOT disconnect the PV module from the Meikai Micro-inverter without
disconnecting AC power.
WARNING: Never disconnect the DC wire connectors under load. Make sure that no
current is flowing in the DC wires prior to disconnecting.
WARNING: N220/N300micro-inverter is powered by DC power, when you reconnect the
DC wire after disconnect make sure the RED LED is on.
Trouble shooting Procedure
When PV module is operating normally and the power output is 40W or more,if the RED LED stays on,
indicates the micro-inverter is not operating correctly.
To troubleshoot an inoperable micro-inverter,please follow the steps in the order shown:
1. Check and verify the utility voltage and frequency are within allowable ranges shown in the
Technical Data section on page 16 of this manual.
2. Check the connection to the utility grid.disconnect the AC wire prior to didconnect DC
wires. Never disconnect the DC wires while the Micro-inverter is producing power.check if
the RED lED is on after reconnect the DC wires,check if the micro-inverter is attempting to
connect to the utility geid after reconnect the AC wires.
3. Check the connection between the micro-inverters in the AC branch, verify the utility grid
is operating normally.
4. Verify all the AC circuit breakers are functiong normally and closed.
5. Check the DC connection between the micro-inverters and the PV modules.
6. Verify the PV module DC voltage is within the allowable range shown in the Technical
Data section on page 16 of this manual.
7. Please call customer support at Meikai if the problem persists.
WARNING: DO NOT attempt to repair the Meikai Micro-inverter, it is unrepairable. If it
fails, please return the unit to your distributor or Meikai Customer Service for
maintenance or replacement.
Disconnect the micro-inverter from the PV module
1. Disconnect the micro-inverter from the PV module follow the steps in the order shown
2. open the AC circuit breaker.
3. Disconnect the First connector in the AC branch．