Potential Hazards - SMA Sunny Island 5048 Installation Instructions Manual

Safety Instructions

3.2 Potential Hazards

Like any other power converter, the Sunny Island 5048 is an electrical device that
presents certain hazards when operated.
The Sunny Island 5048 employs life-threatening voltages and currents.
Complete protection against accidental contact is only provided when the
following points are followed according to the handbook:
• the device is mounted correctly,
• the device is properly grounded,
• all connections to the device are made correctly,
• and the housing cover is subsequently securely closed.
If this is ignored, a significant danger of injury and death arises and
damage to the device may also result.
Before performing any maintenance work or installation work on the
Sunny Island 5048, you must make absolutely sure that all devices built in
or connected to the system are completely isolated from all voltage
sources (battery, (stand-alone) grid, generator). Ensure that the system
cannot be accidentally switched on again. Proceed in the order given
below:
• Switch off all loads.
• Press and hold <ENTER> until the "Hold key to stop" message
appears.
• Press and hold ENTER until the Sunny Island 5048 stops and
"STANDBY–To start press <ENTER>" appears on the display.
• Switch off the Sunny Island 5048 using the DC circuit breaker and
also disconnect the device from the battery (e.g. using the optional SI-
BattCase load disconnecting switch).
• Then disconnect the Sunny Island 5048 from the grid/generator and
stand-alone grid (AC1 and AC2).
• Make sure that the Sunny Island 5048 has been disconnected from
all voltage sources.
• Wait at least five minutes to let the capacitors discharge and allow
the voltage inside the device to drop to a safe level. In order to fully
discharge, the capacitors require approximately 30 minutes. Make
sure to avoid causing a short circuit on the DC side.
• Open the housing cover to ensure the device is not under voltage.
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SMA
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Technical Description