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000334BG
8 - Maintenance
Routine maintenance
Scheduled maintenance operations are not mandatory, but are recom-
mended to preserve the efciency of the PV plant.
We recommend that maintenance operations be carried out by qualied personnel or by the
personnel of ABB (as set forth in a maintenance contract).
The periodicity of the maintenance operations may vary in accordance with local environmen-
tal conditions and the installation
Table: routine maintenance
Annual visual inspection
• Check that the inverter is operating correctly, and that no fault alarms are present
• Ensure all the labels and safety symbols are visible
• Test the integrity of the cables, connectors, and plugs external to the inverter
• Check that the environmental conditions have not changed drastically since
the installation of the system
Annual operations • Check that cable glands and connection block screws are tight
• Check that the wiring box cover is properly closed
• If no monitoring system is present, check the history log of alarms and errors
using the instructions given in the manual in order to look for recent malfunction
warnings
Annual cleaning • Clean the equipment; in particular the bottom grille of the wiring box and the
heat sink
Troubleshooting
Follow the table shown in the following paragraph in order to understand
and resolve warning (Wxxx) and error (Exxx) messages displayed by the
inverter
The operations carried out on the inverter in order to identify and resolve malfunctions may be
carried out only by the organization that carried out the installation or by qualied personnel
Alarm Messages
The equipment is able to indicate errors/warnings on the display only if
the input voltage is higher than the Vdcmin voltage (POWER LED ash-
ing or on; see operation chapter).
The messages and their codes are indicated on the highlighted part b10
of the display
01
.
The following table gives the complete list of errors/warnings relating to string inverters. Some
error/warning codes may not be used depending on the inverter model installed.
DC
AC
b2 b3 b4 b5 b6 b7b1
b11 b12 b13
b10
01
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