Three-phase Grid-tied Solar Inverter Running
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6.3 Inverter stop
When it is necessary to perform power failure maintenance, overhaul, and troubleshooting of the
inverter, please strictly follows the steps below to shut down the inverter:
(1) Disconnect the AC side circuit breaker of the inverter public grid;
(2) Disconnect the DC switch integrated in the inverter;
(3) Disconnect the line switch on the DC input side of the photovoltaic string;
(4) Wait at least 3 minutes until the internal components of the inverter are discharged, and the
inverter shutdown operation is completed.
6.4 Daily maintenance and inspection
In the PV grid-connected system, even if the day and night change and the season changes, the PV
grid-connected inverter can automatically complete grid-connected power generation, shutdown and
start-up operations without human control. In order to ensure and prolong the service life of the inverter,
in addition to using the inverter in strict accordance with the content specified in this manual, it is also
necessary to carry out the necessary daily maintenance and inspection of the inverter.
6.4.1 Periodic maintenance on the inverter
Save inverter
operating data
The monitoring software is used to read the data
of the inverter in real time, and the data recorded
by the monitoring software is regularly backed up.
Save the inverter's operating data, parameters
and logs recorded in the monitoring software to a
file. Check the monitoring software and check the
inverter parameter settings through the handheld
keyboard.
Observe whether the inverter is installed firmly
and whether it is damaged or deformed. To listen
whether there’s any abnormal sound during
inverter running. When the system is connected
to the grid, check various variables. Check
whether the heating of the inverter shell is normal,
and use a thermal imager to monitor the heating
of the system.
Check the RH and dust around the inverter, and
clean the inverter when necessary. Refer to
section 6.4.2.
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