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P a g e
“Warn” or “Fault” (middle and right, respectively) LED indicator is on or flickers: inverter is powered on, but system
fault occurred. Refer to section 7.3 to check the fault code in LCD display, stop the inverter as per section 6.3, and rule
out faults according to chapter 9. After all the faults are removed, repeat the operations in chapter 6.
Stopping Operation
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 breaker switch on PV string DC input side.
4.
Wait for at least 5 minutes until the internal components of the inverter are fully discharged. The inverter has
now stopped operation.
Maintenance
In a solar PV grid-connected power generation system, PSW-G series grid-connected solar inverters can realize grid-
connected power generation and stop/start operations automatically day and night in all seasons. In order to
safeguard and prolong the service life of the inverter, it is necessary to carry out maintenance and inspection on the
inverter besides using the inverter strictly according to this manual.
Regular Maintenance
Task
Method
Maintenance Cycle
Store the
operation
data
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.
Once each quarter
Check
inverter
operation
status
Check to make sure the inverter installation is solid, no damage or
deformation. 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.
Every six months
Clean the
inverter
Check the ambient humidity and dust around inverter, clean the inverter
when necessary. See Section “6.4 Maintenance”
“Cleaning”.
Every six months
Check
electrical
connection
Check whether system cable connection and inverter terminal block are
loosened, if yes, secure them again in the manner specified in section 4.
Check whether the cable is damaged, and whether the cable skin touched by
the metal surface is cut.
Every six months
Check the
security
features
Check the inverter LCD and stop function of the system. Simulate stop
operation and check the stop signal communication. Check the warning
marks and replace them if necessary.
Every six months
Cleaning
The cleaning procedure is as follows:
1.
Disconnect the input and output switches.
2.
Wait ten minutes.
3.
Use a soft brush or a vacuum cleaner to clean the surface and the inlet and outlet of the inverter.
4.
Repeat Section “6.1 Inspection before Operation”.
5.
Restart the inverter.
