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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 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.
PERIODIC MAINTENANCE ON THE INVERTER
Ite m
Adopt monitoring software to read the inverter data in
real time, and bac kup the data rec orded by monitoring
Save the inverter
software periodic ally. Save the inverter running data,
running data
parameters and logs into the file, c hec k the monitoring
software and various parameter setup of the inverter.
Observe whether the inverter is installed firmly, damaged
or deformed. Listen for abnormal noise during inverter
Inverter running
operation. Chec k the variables during system grid-
state
c onnec ted running. Chec k whether the temperature of
inverter enc losure is normal and monitor the heating
c ondition with thermal imager.
Check the RH and dust around the inverter, and clean
Clean the inverter
the inverter when necessary.
Check whether system c able c onnec tion and inverter
terminal bloc k are loosened, if yes, sec ure them again in
Electric al
the manner specified in sec tion "Installation". Check
c onnec tion
whether the c able is damaged, and whether the cable
skin touc hed by the metal surfac e is c ut.
Observe whether the air inlet/outlet is normal; chec k
Maintenance and
whether there are cracks on the fan leaf. Listen for
replacement of
abnormal noise during fan rotation. Clean the air
c ooling fan
inlet/outlet if nec essary; If any abnormity occ urred to the
fan, replac e the fan immediately.
Check the inverter LCD and stop func tion of the system.
Simulate stop operation and chec k the stop signal
Safety func tion
c ommunic ation. Check the warning marks and replace
them if nec essary.
Inspe c tion mode
Ma inte na nc e pe riod
Onc e per quarter
Onc e per half a year
Onc e per half a year
Onc e per half a year
Onc e per half a year
Onc e per half a year
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