MI2S-600D/700D/800D 19
In case of a fault,the following steps can eliminate the inverter fault：
① Check whether the voltage and frequency of the grid are in the normal range .
② Check each connection . First cut off the main circuit breaker of the confluence box, and then disconnect the
circuit breaker of each branch .
③ Check whether the DC terminal connection of the faulty inverter is abnormal . Cut off the DC terminal and
check whether the open circuit voltage of the PV module is within the normal starting range of the inverter. If it
is normal, reconnect . After the inverter is powered on, you can observe the indicator status. If the indicator
blinks red, green and yellow one by one, the power-on initialization is complete and the inverter enters the
normal working state. Check the AC connection then . .
④ Check connection between the junction box of the branch to see if the faulty inverter is abnormal . Please do
not operate while connected to the grid . Turn on the branch circuit breaker and the main circuit breaker.
⑤ Reclose the branch circuit breaker and the main circuit breaker.
⑥ You can contact us if the fault still appears .
The AC end of the inverter and the connector of the AC bus are firm and waterproof, must use
special tools to remove, brute force disassembly will cause damage.
CA UT IO N
7.3 Remove the micro inverter from system
Follow these steps to remove the inverter installed in the system：
①Cut off the main circuit breaker of the confluence box and the circuit breaker of each branch .
②Cut off the connector between the AC bus and the AC cable connecting the junction box to ensure that the
system is off the AC grid .
③Remove the AC terminals of the inverter from the AC bus using a special tool .
④Cover the PV module to which the inverter is connected with an opaque object .
⑤Measure the DC terminal with the DC current clamp to ensure no current between the PV module and the
inverter.
⑥Cut off the DC terminal between the PV module and the inverter.
⑦ Remove the inverter from the bracket .
⑧If you do not install a new micro inverter, use the AC bus node seal cover to seal the open node .
7.4 Replace the micro inverter
Follow below steps to replace new inverter：
①Remove the fault inverter from the bracket .
②Install new inverter.
③Mark the serie no of the two inverters .
④Connect the AC bus and the AC cable connecting the junction box with a dedicated connector.
⑤Turn on the circuit breaker and main circuit breaker of each branch of the confluence box.
⑥Replace the inverter sequence number on the server, and the new inverter will be input the system to replace
the original inverter.
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