SMA SUNNY CENTRAL 900CP XT - Checking the Heating Elements and Hygrostat

6 Maintenance
SMA Solar Technology AG
Maintenance ManualSCCPXT-E7-WA-en-3746
Procedure:
1. Switch the inverter to Stop.
2. Connect the supply voltage (see Section4.3.1, page28).
☑ The fans start to run for a few moments.
✖ The fans do not start up?
• Please contact (see Section9, page68).
6.4.1.2 Checking the Heating Elements and Hygrostat
Figure 11: Position of the heating element and the hygrostat
Position Designation
A Hygrostat
B Heating element
DANGER
Danger to life due to electric shock or electric arc if live components are touched
• Switch off the inverter and wait at least 15minutes before opening it to allow the capacitors to discharge
completely.
• Disconnect the inverter (see Section4, page26).
CAUTION
Risk of burns due to hot components
Some components of the product can get very hot during operation. Touching these components can cause burns.
• Observe the warnings on all components.
• During operation, do not touch any components marked with such warnings.
• After switching off the product, wait until any hot components have cooled down sufficiently.
• Wear suitable personal protective equipment for all work on the product.
Procedure:
1. Switch the inverter to Stop.
2. Connect the supply voltage (see Section4.3.1, page28).
3. Set the hygrostat to the minimum value. To do this, pull the selector switch out slightly.
Tip: the hygrostat is adjusted correctly if the relay of the hygrostat emits an audible click.