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 conductors connected to the communication assembly can remain plugged in and do not
need to be removed to disassemble the Power Unit.
Damage to the enclosure parts due to frost
• Do not disassemble the Power Unit unless the ambient temperature is at least 0°C (32°F)
and conditions are frost-free.
Damage to the Connection Unit due to moisture ingress
If no new Power Unit is immediately available, do not disassemble the Power Unit. As soon as the
Power Unit is disassembled, moisture can penetrate the Connection Unit.
• Only disassemble the defective Power Unit once the new Power Unit is ready and
available.
Procedure:
1.
Danger to life due to high voltages
• Disconnect the inverter from all voltage sources (see Section 4, page 6).
2. Remove the connecting terminal plate with the
connected DC conductors from slot
DC-in
. To do
this, unscrew the screws using a flat-blade
screwdriver (blade width: 3.5 mm (0.14 in)) and
pull the connecting terminal plate out of the slot.
During this operation, only touch the connecting
terminal plate on the black enclosure.
5 Disassembling the Defective Power Unit
SMA Solar Technology America LLC
Service Manual
SB30-77-1SP-US-40-AT-PU-SG-xx-11
8
ENGLISH
Summary of Contents for SB3.0-1SP-US-40
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