9
2 Basic safety instructions
2.
Basic safety instructions
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 isolating switches 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 isolating switches 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.
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
during operation.
●
Always wear safety gloves when touching
the inverter.
●
To comply with IEC 62109-5.3.3 safety requirements and
avoid injury or material damage, the inverter must be in-
stalled and operated in accordance with the safety and op-
erating instructions set out in this manual. Delta Electronics
is not responsible for damage resulting from failure to follow
the safety and operating instructions set out in this manual.
●
The inverter may only be installed and commissioned by
installers who have been trained and approved for the in-
stallation and operation of grid-connected solar inverters.
●
All repair work on the inverter must be carried out by Delta
Electronics. Otherwise the warranty will be void.
●
Warning notices, warning symbols and other markings
attached to the inverter by Delta Electronics must not be
removed.
●
To avoid the risk of arcing, do not disconnect cables when
the inverter is under load.
●
To prevent damage due to lightning strikes, follow the appli-
cable regulations in your country.
● All external connections must be sufficiently sealed in order
to ensure an IP65 protection degree. Seal any unused con-
nections with the cover caps supplied.
●
The covers inside the inverter do
not
have to be removed
for the standard installation. All connections required for
the standard installation are also accessible with the covers
attached.
●
Only equipment in accordance with SELV (EN 60950) may
be connected to the RS485 interfaces.
Installation and Operation Manual for Solar Power Inverter M70A EU V2.0 EN 2020-08-03
