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Maintenance and Cleaning
SMA Solar Technology AG
9.1.4 Testing the Fans
Testing the fans
To test the fans you will need a special data capture device (e.g. Sunny WebBox) or a PC
with appropriate software (e.g. Sunny Explorer) in order to be able to change the
parameters of the inverter.
You will also need the installer password to access the installer mode.
1. Enter the installer password.
2. Set the parameters "CoolSys.FanTst" and/or "Fan test" to "On" in the installer mode.
3. Check the air flow in both fans.
The inverter takes cooling air in from underneath and the left side and blows it out again above
through the ventilation grids. Listen for any unusual noise, which could indicate incorrect
installation or that the fans are faulty.
4. After the test, set the parameter "CoolSys.FanTst" and/or "Fan test" back to the "Off" position.
☑ The test of the fans has been completed.
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Installation Manual