ABB Solar Inverter UNO-8.6-TL-OUTD-S-US-A

Remove and replace the memory back-up battery.;

- Clean the equipment at least annually; in particular, the lower grill on the wiring box through which the air for cooling the heatsink passes and the heatsink itself. If possible, use an extractor or suitable pipe cleaners.

- Once a year or in the event of malfunction, check that the environmental conditions have not changed drastically (exposure to weather conditions); also check that the inverter or PV panels have not been shaded or isolated by foreign bodies.

- Once a year or in the event of malfunction, check the tightness of the cable openings, the fitting of the connectors, and front covers. Loose fittings can allow water seepage into the cabinet which may result in short circuits due to high humidity. - Check internal cooling fan operation (monitor start-up for warning).

- Check DC pressure connectors.

- Check AC pressure connectors.

- Re torque chassis access covers to insure NEMA4X compatibility.

- Check all connections terminals for discoloration or signs of high temp/current.

- Clean the photovoltaic panels every six months, at the change of season or as necessary. The performance of the system depends on the condition of the PV panels. To clean, follow the specifications of the PV panel supplier.

- Check the cooling air path and heatsink for blockages.;