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STOPPING
When it is necessary to carry out power-off maintenance, inspection and fault elimination
on the inverter, stop the inverter according to the following steps:
(1) Disconnect the breaker on inverter public grid AC side;
(2) Disconnect the integrated DC switch of the inverter;
(3) Disconnect the circuit switch on PV string DC input side;
(4) Wait for at least 5 minutes until the internal parts of the inverter are fully discharged,
and complete the stop operation.
DAILY MAINTENANCE
In solar PV grid-connected power generation system, the series grid-connected solar
inverter can realize grid-connected power generation and stop/start operations automati-
cally day and light in whatever seasons. In order to safeguard and prolong the service life
of the inverter, it is necessary to carry out daily maintenance and inspection on the
inverter besides using the inverter strictly according to this manual.
REGULAR MAINTENANCE
Maintenance
contents
Store the operation
data
Check inverter
operation status
Clean the inverter
Check electrical
connection
Check the security
features
Maintenance methods
Use real-time monitoring software to read
inverter running data, regularly back up all
inverter running data and stats. Check the
monitoring software and inverter LCD
screen to make sure the parameters are set
correctly.
Check to make sure the inverter installation
is solid, no damage or def ormation. When
inverter running, check to make sure the
sound and variables are normal. When
inverter running, use thermal imager to
check whether the case cooling is normal.
Check the ambient humidity and dust
around inverter, clean the inverter when
necessary.
Check whether system cable connection
and inverter terminal block are loosened, if
yes, secure them again in the manner
specified in installation. Che ck whether the
cable is damaged, and whether the cable
skin touched by the metal surface is cut.
Check the inverter LCD and stop function of
the system. Simulate stop operation and
check the stop signal communi cation. Check
the warning marks and replace them if
necessary.
Maintenance
cycle
Once each quarter
Every six months
Every six months
Every six months
Every six months
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