User Manual
9 Troubleshooting and Maintenance
45
9.2 Maintenance
9.2.1 Routine Maintenance
Items
Methods
Period
System
clean
Check the temperature and dust of the inverter.
Clean the inverter enclosure.
Check the humidity and dust of the
environment. Meanwhile check whether the
filter function of the air inlet is ok. Clean the air
inlet and outlet, when necessary.
Six months to a
year (it depends
on
the
dust
contents in air.)
Fans
Check whether there is crack of the fan blade
Check whether there is any abnormal noise of
the fan.
Clean or replace the fans.
Once a year
Devices
check
Check the fuses and the DC SPD.
Replace the fuse.
Contact Sungrow to order new DC SPDs.
Every 6 months
9.2.2 Maintenance Instruction
Fans’ Maintenance
There are four fans at the side of the inverter for active cooling during running
operation. If the fans are dirty or out of work, the inverter may not be well cooled
down and its efficiency may accordingly decrease. Therefore it is necessary to
clean the dirty fans or replace the broken fans.
Disconnect the inverter from the grid first and then PV arrays before
any maintenance work.
Lethal voltage still exists in the inverter. Please wait for at least ten
minutes and then perform maintenance work.
Fans’ maintenance work may only be performed by qualified
electricians.
Step 1
Disconnect the AC circuit breaker.
Step 2
Rotate DC switch to the “OFF” position and then turn off the upstream
DC circuit break or pull off the MC4 terminal.
Step 3
Wait for at least ten minutes.
Step 4
Disconnect all electrical connection in the reverse procedures in the “6
Electrical Connection”.
Step 5
Lift up the inverter over the backplate with the help of others and then
remove it from the wall.
Step 6
Place the inverter onto the platform.
Step 7
Loosen the screws as shown in the
right diagram.
Step 8
Disassemble the metal plate slightly.
