Disassembling The Defective Power Unit - SMA SBS3.7-10 Manuel De Service

SMA Solar Technology AG
5

Disassembling the Defective Power Unit

Prior to disassembling the defective Power Unit, all connections between the Power Unit and the
Connection Unit must be severed. Only then can the Power Unit be removed from the Connection
Unit. All cables connected to the communication assembly can remain plugged in and do not need
to be removed to disassemble the Power Unit.
Procedure:
1.
Danger to life due to high voltages
• Disconnect the inverter from voltage sources (see inverter manual).
2. Remove the terminal block with the connected DC
conductors from slot DC-in. To do this, unscrew the
screws using a flat-blade screwdriver (blade width:
4 mm (5⁄32 in)) and pull the terminal block out of
the slot. While doing so, only touch the terminal
block on the black enclosure.
3. Remove the terminal block with the connected AC
conductors from slot AC-out. To do this, unscrew the
screws using a flat-blade screwdriver (blade width:
4 mm (5⁄32 in)) and pull the terminal block out of
the slot.
4. If there is a switch and an outlet for secure power
supply operation connected, remove the terminal
block with the connected cable from the SPS slot. To
do this, unscrew the screws using a flat-blade
screwdriver (blade width: 3.5 mm) and pull the
terminal block out of the slot.
Service Manual
5 Disassembling the Defective Power Unit
DANGER
SBSxx-10-AT-PU-SG-xx-10 9