Maintenance and Cleaning SMA Solar Technology AG
66 SB20_25_30HF-IEN102911 Installation Guide
9.1.2 Checking the Fans
1. Request the installer password from the SMAServiceline (contact: see Page 93).
2. Set the "CoolSys.FanTst" or "Fan test" parameter to "On" in the installer mode.
3. Check the air-flow of the fan.
The inverter sucks air in from underneath and then blows it back out on the upper left side. Listen
for any unusual noise, which could indicate incorrect installation or that the fan is faulty.
4. After checking the fan, set the "CoolSys.FanTst" or "Fan test" parameter back to "Off".
☑ You have finished checking the fan.
Checking the Fan
To test the fan you will need a special data logging device (e.g. Sunny WebBox) or a PC
with appropriate software (e.g. Sunny Explorer) in order to change the parameters of the
inverter.
You will also need the installer password to access the installer mode.
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