13 Cleaning and Maintenance
SMA Solar Technology AG
Operating manual
SI44M-80H-13-BE-en-15
128
13.4
Cleaning the Fans
If the user interface displays the warning
Derating due to temp.
unusually often, it is likely that one of the fans is
defective or blocked.
Procedure:
• Clean the ventilation grids.
• Clean the fans.
Cleaning the Ventilation Grids
Proceed as follows to clean each ventilation grid.
Procedure:
1. Remove the ventilation grid laterally.
2.
NOTICE
Damage to the inverter due to foreign bodies
• Do not remove the ventilation grid permanently, otherwise foreign bodies could penetrate the enclosure.
3. Clean the ventilation grid with a soft brush, a paint brush, or compressed air.
4. Close the recessed grips with the ventilation grids. Ensure that the assignment is correct. The correct assignment is
marked on the inside of each ventilation grid:
links/left
for the left-hand side and
rechts/right
for the right-hand
side.
Cleaning the Fans
Proceed as follows to clean each fan.
DANGER
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.
1. Disconnect the Sunny Island from voltage sources (see Section 12, page 126).
2. Wait for the fans to stop rotating.
3. Check whether the fan guard is dusty or badly clogged.
4. If the fan guard is dusty, clean it with a vacuum cleaner or a soft brush.
5. If the fan guard is heavily soiled, remove it and clean it.
