Opening the Inverter
Qualified person
If you have to open the inverter enclosure lid for repairs or replacement, proceed as described in the following.
DANGER
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 ( > Disconnecting the Sunny Island from Voltage Sources).
- After switching off the inverter, wait at least 15 minutes before opening the inverter to allow the capacitors to discharge completely.
NOTICE
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). Observe the applicable safety regulations.
NOTICE
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:
- To prevent water or dust entering the interior of the inverter, clean and dry the lid prior to removal.
- 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.
- Carefully remove the enclosure lid.
- Perform the repair or replacement.
- Replace the enclosure lid with the screws onto the enclosure and hold in place.
- 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.
- 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.
- Recommission the inverter ( > Recommissioning the Inverter).
