SMA SC 500HE-US Maintenance Manual - Manual (Page 39)

SMA America, LLC 4 Maintenance
Maintenance Manual SC500HEUS-eng-WH-IUS120411 39
Figure 12: Location of the heating element, hygrostat and fan.
Requirement:
☐ Control voltage is present.
☐ There are no problems.
1. Switch the Sunny Central to "Stop."
2. Open the doors of the connection cabinet.
3. Disassemble the heating element's protective cover.
4. Adjust the hygrostat in the connection cabinet to the minimum value so that the heating element
switches on. Tip: the hygrostat is adjusted correctly if the relay clicks audibly.
5. Check whether the heating element begins to radiate heat after approximately 5 minutes.
If the heating element is not switched on, contact the SMA Service Line.
Position Designation
A Fan
B Hygrostat
C Heating element