Opening And Closing The Inverter - SMA SUNNY ISLAND 4.4M Operating Manual

13 Cleaning and Maintenance

13.10 Opening and Closing the Inverter

If you have to open the inverter enclosure lid for repairs or replacement, proceed as described in the following.
Danger to life due to electric shock when live components or cables are touched
High voltages are present in the conductive components or cables of the product. Touching live parts and cables
results in death or lethal injuries due to electric shock.
• Do not touch non-insulated parts or cables.
• Disconnect the product from voltage sources and ensure it cannot be reconnected before working on the
device.
• After disconnection, wait 15 minutes until the capacitors have discharged.
• Observe all safety information on components associated with the product.
• Wear suitable personal protective equipment for all work on the product.
Damage to the enclosure seal in subfreezing conditions
If you open the product when temperatures are below freezing, the enclosure seals can be damaged. Moisture can
penetrate the product and damage it.
• Only open the product if the ambient temperature is not below -5°C.
• If a layer of ice has formed on the enclosure seal when temperatures are below freezing, remove it prior to
opening the product (e.g. by melting the ice with warm air).
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.
138 SI44M-80H-13-BE-en-15
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SMA Solar Technology AG
Operating manual