Cleaning And Maintenance; Cleaning And Checking The Sunny Island Inverter Enclosure; Checking The Function; Checking The Connections - SMA SUNNY ISLAND 4.4M Operating Manual

SMA Solar Technology AG

14 Cleaning and Maintenance

14.1 Cleaning and Checking the Sunny Island Inverter Enclosure
Damage to the inverter due to the use of cleaning agents
• If the inverter is dirty, clean the enclosure, the enclosure lid, the type label and the LEDs using only clean water
and a cloth.
• Ensure that the inverter is free of dust, foliage and other dirt. Carefully remove heavy dirt with a soft brush.
14.2

Checking the Function

Testing period
• For new systems, check every week during the six months following commissioning whether error messages have
been logged. This will reveal any hidden errors in the installation or configuration.
• For all other systems, check every six months whether error messages have been logged.
Procedure:
1. Activate the user interface of the inverter (see Section 8.1, page 110).
2. Log in as User (see Section 8.2, page 112).
3. Select the menu Events.
4. Set filter:
• Activate Warning and Error.
• Deactivate Information.
5. Set the desired time period and select [Apply time filter].
6. If error messages have been logged, eliminate the cause (see Section 15.2, page 145).
14.3

Checking the Connections

Danger to life from electric shock due to high voltages
High voltages are present inside the inverter. When the enclosure lid is removed, live components can be touched
that can result in death or serious injury due to electric shock.
• Disconnect the inverter from all voltage sources (see Section 13, page 132).
• After switching off the inverter, wait at least 15 minutes before opening the inverter to allow the capacitors to
discharge completely.
1. Make sure the Sunny Island is dead. (see Section 13, page 132).
2. Ensure that the cables on the DC+ and DC‒ connections are securely fastened (torque: 12 Nm).
3. Ensure that the connections are free of corrosion.
4. Ensure that the cables in the AC1 and AC2 connections are securely fastened.
5. Close the Sunny Island (see the Sunny Island inverter installation manual).
6. Switch on all load-break switches and circuit breakers (see Section 14.12, page 143).
Operating Manual
14 Cleaning and Maintenance
SI44M-80H-12-BE-en-10 133