SMA SI 3.0-11 - Manual (Page 77)

SMA Solar Technology AG 10 Cleaning and Maintenance
Operating Manual SI30M-44M-60H-80H-BE-en-30 77
10.7 Cleaning the Fans
If the Sunny Remote Control shows the warning W137 Derate exceptionally often, one of the fans is probably defective
or blocked.
Procedure
2. Wait for the fans to stop rotating.
3. Check whether the fan guard is dusty or badly clogged.
If the fan guard is dusty, clean it with a vacuum cleaner or a soft brush.
If the fan guard is heavily soiled, remove it and clean it:
• Use a screwdriver to push the two locking tabs at the right-hand
edge of the fan guard to the right and remove them from the
retainer.
• Carefully remove the fan guard.
• Clean the fan guard with a soft brush, a paint brush, a cloth or compressed air.
4. Check whether the fan is soiled.
If the fan is soiled, remove the fan:
• If a fan guard is fitted, remove the fan guard (see step 3).
• Push the front locking tabs of the fan backwards and the rear
locking tabs of the fan forwards.
• Slowly remove the fan from the Sunny Island.
1. :$51,1*
Danger to life from electric shock due to live voltage
High voltages are present inside the Sunny Island. When the enclosure lid is removed, live components can be
touched which can result in death or serious injury due to electric shock.
• Disconnect the Sunny Island from voltage sources (see Section 8, page 40).