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13.
Replacing the inverter
DANGER
Electric shock
Potentially fatal voltages are present in the
inverter during operation. When the inverter
is disconnected from all power sources, this
voltage remains in the inverter for up to 60
seconds.
You should therefore always carry out the fol-
lowing steps before working on the inverter:
1. Turn both DC disconnectores to the OFF
position.
2. Disconnect the inverter from all AC and DC
voltage sources and make sure that none
of the connections can be restored acciden-
tally.
3. Wait at least 60 seconds for the internal
capacitors to discharge.
DANGER
Electric shock
Potentially fatal voltages are present at the DC
connections of the inverter. When light falls on
the solar modules, they immediately start to
generate electricity. This also happens when
light does not fall directly on the solar modules.
► Never disconnect the inverter from the solar
modules when it is under load.
► Turn both DC disconnectores to the OFF
position.
► Disconnect the connection to the grid so that
the inverter cannot feed energy into the grid.
► Disconnect the inverter from all AC and DC
voltage sources. Make sure that none of the
connections can be restored accidentally.
► Ensure that the DC cables cannot be
touched accidentally.
DANGER
Electric shock
The inverter has a high leakage current value.
► Always connect the ground cable first, then
the AC and DC cables.
WARNING
Electric shock
The IP65 protection degree is no longer guaran-
teed when the door is open.
► Only open the door when absolutely
necessary.
► Do not open the door if water or dirt might
enter the inverter.
► After work is completed, ensure that the
door is properly shut and tightened again.
Check that the door is properly sealed.
Installation and Operation Manual M50A_260 RPI503M260000 Product version L and M EU V1.3 EN 2023-08-14
13 Replacing the inverter
WARNING
Heavy weight
The inverter is heavy.
► Lift and carry the inverter with at least 2
people.
WARNING
Hot surfaces
The surface of the inverter can get very hot dur-
ing operation.
●
Always wear safety gloves when touching
the inverter.
It is best to wait before removing the old inverter
until you have received the replacement device
from Delta Electronics.
There is normally an isolating switch (for example
in an equipment wiring box) between the inverter
and the grid connection box and between the
inverter and the solar modules. This isolates the
inverter from all the AC and DC voltage sources
and renders it de-energized.
147
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