Recommissioning The Inverter - SMA SUNNY ISLAND 4.4M Operating Manual

SMA Solar Technology AG
Damage to seals on the enclosure lids in subfreezing conditions
If you open the enclosure lid when temperatures are below freezing, the enclosure lid seal could be damaged. This
can lead to moisture entering the inverter.
• Only open the enclosure lid if the ambient temperature is not below -5°C
• If a layer of ice has formed on the seal of the lid when temperatures are below freezing, remove it prior to
opening the enclosure lid (e.g. by melting the ice with warm air). Observe the applicable safety regulations.
Damage to the inverter due to electrostatic discharge
Touching electronic components can cause damage to or destroy the inverter through electrostatic discharge.
• Ground yourself before touching any component.
Procedure:
1. To prevent water or dust entering the interior of the inverter, clean and dry the lid prior to removal.
2. On the Sunny Island, remove all screws of the lower enclosure lid using an Allen key (AF 5) and remove the
enclosure lid. Retain the screws and conical spring washers for later use.
3. Carefully remove the enclosure lid.
4. Perform the repair or replacement.
5. Replace the enclosure lid with the screws onto the enclosure and hold in place.
6. Attach one conical spring washer to each screw. The grooved side of the conical spring washer must point to the
screw head. Tip: The scope of delivery of the Sunny Island inverter includes one additional replacement screw
with a conical spring washer.
7. On the Sunny Island, fasten the enclosure lid following the
sequence 1 to 6 using an Allen key (AF 5) (torque: 6 Nm). The
teeth of the serrated conical spring washer must press into the
enclosure lid. This ensures that the enclosure lid is grounded.
8. Recommission the inverter (see Section 14.12, page 143).

14.12 Recommissioning the Inverter

If you have disconnected the inverter from all voltage sources and want to recommission it, proceed as follows.
Requirements:
☐ All circuit breakers in the AC distribution board must be open.
Operating Manual
14 Cleaning and Maintenance
SI44M-80H-12-BE-en-10 143