153
Installation and Operating Manual for RPI M15A M20A Solar Inverter V1.0 2016-03-18
12 Maintenance
12. Maintenance
DANGER
Electric shock
During operation there is a potentially lethal volt-
age present inside the inverter. Even after the
inverter has been disconnected from all power
sources, this voltage is present in the inverter for
up to a further 80 seconds.
Therefore always perform the following work
steps before working on the inverter
1.
Turn the DC disconnector to the
OFF
posi-
tion.
2.
Disconnect the inverter from all AC and DC
sources and make sure that none of the con-
nections can be inadvertently re-established.
3.
Wait at least 80 seconds to allow the internal
capacitors to discharge.
DANGER
Electric shock
There is a potentially lethal voltage present
on the DC terminals of the inverter. The solar
modules start to produce current as soon as light
falls on them. This occurs even if the light is not
shining directly on the solar modules.
► Never disconnect the inverter from the solar
modules when it is under load.
► Turn the DC disconnector to the
OFF
posi-
tion.
► Disconnect the connection to the grid so that
the inverter cannot supply any energy to it.
► Disconnect the inverter from all AC and DC
sources. Make sure that none of the connec-
tions can be inadvertently re-established.
► Protect the DC cables from being inadver-
tently touched.
Repair work and the replacement of components
in the inverter may only be undertaken by Delta
customer service.
Exceptions:
► Replacing fans.
► Cleaning air inlets/outlets.
Failure to comply with these requirements will
result in the guarantee being voided.
You will find the contact data for Delta customer
service in your country on the last page of this
document.
12.1 Regular checks
To ensure proper operation, carry out the following
visual
inspections
every 6 months:
► Check that all visible connectors, screws and cables are cor-
rectly seated. Do not touch the components.
► Check for damaged components. Do not touch the damaged
components.
► Check the fans, air inlets and air outlets for contamination
and clean if necessary.