Delta M70A User Manual

10 Maintenance
Safety Instructions
Installation and Operation Manual for Solar Power Inverter M70A EU V1.1 EN 2020-02-20
104
10. Maintenance
10.1 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.
WARNING
Electric shock
The IP65 protection rating 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 doors are properly sealed.
WARNING
Heavy weight
The inverter is heavy.
► The inverter must be lifted and carried by at
least two people.
WARNING
Hot surfaces
The surface of the inverter can get very hot dur-
ing operation.
● Always wear safety gloves when touching
the inverter.
Always start all maintenance and replacement
work with “10.4 Making preparations for mainte-
nance work - disconnecting the inverter from the
grid (AC) and solar modules (DC)”, page 106!
Always complete all maintenance and replace-
ment work with “10.12 Finishing the maintenance
work - connecting the inverter to the grid (AC)
and solar modules (DC)”, page 139!
All work described in this section must only be
carried out by electrical installers who are trained
and approved for work on grid-connected solar
inverters.

Delta M70A Specifications

General

Brand	Delta
Model	M70A
Category	Inverter
Language	English