Recommended system maintenance
If not performed more often, ABB recommends having the systems checked after about ve years of activity to
maintain the correct working performance.
Clean the photovoltaic modules every six months, at the change of season or as necessary.
The performance of the system depends on the condition of the PV modules. To clean, follow
the specications of the PV module supplier.
Preventative maintenance
These maintenance operations MUST be carried out by the installer or trained maintenance personnel.
If repairs to the inverter are required for any reason, recheck all items after repairs are completed.
Interval Inverter maintenance item
Annually Check the cooling air path and heatsink for blockages
Annually Check the DC OV surge arresters 15 (W019 via RS-485 or fault log)
Annually Check the AC OV surge arresters 18 (W018 via RS-485 or fault log)
Annually Check internal cooling fan operation (monitor start-up for warning)
Annually Check all electrical connections using an infrared (IR) camera or equivalent to determine
hot spots. Check torque value for any connection indicated*
Annually Check AC pressure connectors of the inverter output circuit
Annually Check DC pressure connectors of the inverter input circuit
Annually Check torque of screws on chassis access covers to insure NEMA4X compatibility*
Annually Check all connections terminals for discoloration or signs of high temp/current*
3 years Remove and replace the memory back-up battery, see instructions in this section.
*ABB recommends checking this item after the rst six months of operation, and then annually.
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