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R
outine maintenance
It is recommended that maintenance operations are only performed by qualified personnel or
ABB personnel (under a servicing contract).
The maintenance schedule may vary depending on the environmental conditions of the in-
stallation premises.
Annual visual
inspections
Annual operations
Annual cleaning
T
roubleshooting
Operations on the inverter to identify and address any faults may only be performed by the
installer or by qualified personnel.
A
larm Messages
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.
Routine maintenance operations should not be considered obligatory,
but rather as recommended in order to maintain the efficiency of the PV
system.
Table: routine maintenance
• Check that the inverter is operating properly, without any alarm signals
• Ensure that all the safety labels and 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 the tightening of the cable glands and of the screw terminal blocks
• Check the front cover is fixed
• If there is no monitoring system, check the record of alarms and errors using
the indications given in the manual in order to check recent malfunction signals
• Clean the equipment; in particular the heat sink
In order to understand and resolve warning (Wxxx) or error (Exxx) sig-
nals that appear on the inverter's display, follow the table given in the
following paragraph.
The equipment can notify errors/warnings on the display only if the input
voltage is greater than the Vdcmin voltage (POWER Led flashing or lit;
see chapter on operation)
The messages and related codes are shown on the display.
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