SMA SUNNY CENTRAL Maintenance manual - Manual (Page 37)

SMA Solar Technology AG Covers and lockings
Maintenance Manual SCWAR-WEN094020 37
4.3 Checking the seals
Seals are at the doors of the switch cabinets as well as at the Sunny Centrals which consist of two
switch cabinet units at the connecting point between the two units.
1. Visually check the switch cabinet's seals for cracks or other damages.
☑ Seals in the sealing area must be completely replaced when damaged.
– In case the seals are damaged outside this area, a sufficient sealing effect is usually still
available.
2. In order to prevent damage due to freezing of the seals caused by the weather, use talcum,
vaseline or wax.
4.4 Checking of lockings and hinges
1. Check the correct operation of the inverter cabinet lockings and the concrete substations by
opening and closing the doors.
☑ A locking which cannot be moved smoothly indicates corrosion and thus leakage.
2. Check which part of the locking is damaged and take corrective measures.
3. Make sure that the door's hinges move easily.
4. Check the function of the door stay. Replace defective door stays.
5. Spray all moveable locking elements and movement points with a suitable lubricant which is
free of water.
DANGER!
Death resulting from electric shock and burning upon touching the medium-
voltage grid's live components.
• Only work on the device when it is switched off and voltage-free.
DANGER!
Death resulting from electric shock and burning upon touching the medium-
voltage grid's live components.
• Only work on the device when it is switched off and voltage-free.