SMA SUNNY CENTRAL Maintenance manual - Manual (Page 50)

Checking protective devices SMA Solar Technology AG
50 SCWAR-WEN094020 Maintenance Manual
6.5.2 Checking the Blitzductor
Measurements
An exact statement about the state of the arrester can only be made with an appropriate test device.
The DEHNrecorder LC M3 from Dehn + Söhne GmbH & Co. KG is the suitable test device for this
purpose. The measurement procedure is described in the user manual of the device and has to be
carried out by an electrically skilled person.
6.6 Maintaining the GFDI
The GFDI is subject to aging caused by wear of the contacts every time they are tripped. Due to aging,
sensitivity is reduced. Check the insulation of the PV generator in regular maintenance intervals in
order to ensure the functionality of the GFDI.
1. Visual inspection of the GFDI. Remove possible dirt or dust deposits by using a vacuum cleaner
or with compressed air.
Functional test of the GFDI
Switching the GFDI, in deactivated status of the inverter, for mechanically checking the function and
for checking the signaling.
2. Switch off F71
☑ Failure 201 appears in Sunny Central Control.
3. Switch on F71
☑ Failure 201 is confirmed.
1. Visual inspection of the arrestor for optical signs of
wear.
2. A visual inspection is not possible for this arrestor.
Determine whether the inverter is ready for
operation by means of a measuring device.
DANGER!
Death resulting from electric shock and burning upon touching the medium-
voltage grid's live components.
• Do not touch parts other than those described in the instructions.
Insulation test of the PV generator and of the connected Sunny Central.
The plant operator determines the insulation test of the entire plant.