11 Troubleshooting
SMA Solar Technology AG
82
STP5-9TL-IA-en-10
Installation Manual
4. Insert the new varistor into the terminals of the
terminal block. The labels of the varistor must face
to the right in the inside of the inverter.
5. Remove the insertion tool from the contacts of the terminal block.
6. Recommission the inverter (see Section 8).
11.8 Cleaning the Fans
Proceed as follows to clean each fan.
1. Disconnect the inverter from voltage sources (see Section 10).
2. Wait for the fans to stop rotating.
3. Check whether the fan guard is dusty or heavily soiled.
If the fan guard is dusty, clean the fan guard with a vacuum cleaner.
If the fan guard is heavily soiled, remove the fan guard and clean it:
• Use a screwdriver to push the two locking tabs
at the right 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.
