SMA Sunny Island 4248U, Installation & Operating Instructions Manual

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SI4248U Manual User Manual
85
Start Up
Powering Up
WARNING:
This step in the User’s Manual assumes that the Sunny Island 4248U
has already been checked for proper connections, voltages, polarities and has
been commissioned by your installer. If this is the first time the inverter will be
powered up, refer to the Commissioning instructions in the Installation part of this
manual. If you are not qualified to perform the commissioning of the inverter,
secure the services of qualified personnel.
To turn on the Sunny Island 4248U, switch the DC disconnect on the front of the inverter to the
ON position. This will cause the inverter to come on and enter the INIT phase of start up. During
this phase the inverter performs a series of self tests to determine that there are no faults present
in the system before beginning operation.
Once the INIT phase is complete, the inverter will display “Press <Enter>”. Pressing the ENTER
key will start the inverter.
If the AUTOSTART parameter is set to ON, once the DC disconnect is switched to the ON
position, the inverter will begin operating automatically after a short delay.
Once the inverter begins operating, it displays the home screen which shows the current
operating mode and power throughput.
As described previously, use the User Interface to navigate and view parameter settings. If in
doubt, refer to the User Interface section of this manual.
Shutting Down
To turn off the inverter press and hold the ESC key. When prompted to turn off the inverter,
press ENTER. The inverter will then remain in standby mode.
To power down the inverter, switch the DC disconnect on the front of the inverter to the OFF
position.
CAUTION: Even then the inverter may start, if any voltage source is accidentally
applied to the AC side. To be sure the inverter will remain off, also disconnect it
on the AC side.