ABB Solar Inverter PVS-166/175-TL-US

- 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 on the external arrays of cooling fan.

- Check the tightening of the cable glands and the screw terminal blocks.

- Check the front covers is secured.

- 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 notification of recent malfunctions.

- For the models with AC 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.

- Replace Internal Fan section.;

- Replace External Fan section.;