Routine maintenance
Routine maintenance operations should not be considered obligatory,
but rather as recommended in order to maintain the efciency of the PV
system.
It is recommended that maintenance operations are only performed by qualied personnel or
ABB personnel (under a servicing contract). The maintenance schedule may vary depending
on the environmental conditions of the installation premises.
Table: routine maintenance
Annual visual inspections
• Check that the inverter is operating properly, without any alarm signals
• Ensure all labels and safety symbols are visible
• Check the integrity of the cables, connectors and cable glands outside
the inverter
• Check that the environmental conditions have not changed
dramatically from those on installation.
• Check there are no obstacles (animals, insects, leaves or anything
which could reduce the heat exchanging capacity of the heat sink) at
the top, at the bottom and between the ns.
Annual operations
• Check the tightening of the cable glands and the screw terminal blocks
• Check the front cover is secured to the wiring boxes
• If there is no monitoring system, check the record of alarms and errors
using the indications provided in the manual in order to check recent
notication of recent malfunctions.
• For the models with AC+DC disconnect switch, it is recommended
that once a year the disconnect switch is operated a number of times
(at least 10) to keep the contacts clean and prevent oxidation. This
operation must be carried out in periods with low input power or at
night.
Annual cleaning • Clean the equipment; verify, in particular, clean the lower array of the
cooling fan assembly and the heat sink.
Alarm Messages and troubleshooting
The equipment can notify errors/warnings through the LEDs only if the input
voltage is greater than the Vdcmin voltage (POWER Led ashing or lit).
The messages and the corresponding codes can only be veried using
the designated Aurora Manager LITE software.
Operations on the inverter to identify and address any faults may only be performed by the
installer or by qualied personnel.
In order to understand and resolve the warning (Wxxx) or error (Exxx)
signals, refer to the table provided in the following paragraph.
Some error/warning codes may not be used depending on the inverter model installed.
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