SMA Sunny Boy Storage 3.8-US Instrucciones De Instalación página 65

SMA Solar Technology AG
8 Disconnecting the Inverter from Voltage Sources
Prior to performing any work on the product, always disconnect it from all voltage sources as
described in this section. Always adhere to the prescribed sequence.
Danger to life due to electric shock from destruction of the measuring device
due to overvoltage
Overvoltage can damage a measuring device and result in voltage being present in the
enclosure of the measuring device. Touching the live enclosure of the measuring device results in
death or lethal injuries due to electric shock.
• Only use measuring devices with a DC input voltage range of 600 V or higher.
Procedure:
1. Disconnect the AC miniature circuit breaker and secure against reconnection.
2. Switch off the battery or the load-break switch of the battery (see documentation of the battery
manufacturer).
3. If the multifunction relay is used, switch off any supply voltage to the load.
4. Wait 5 minutes. This will ensure that the capacitors are discharged.
5. Unscrew all 6 screws of the enclosure lid of the Connection Unit and carefully remove the
enclosure lid toward the front (TX25). When doing so, note that the LED assembly in the
enclosure lid and the communication assembly in the inverter are connected via a ribbon
cable.
6. Pull the ribbon cable connecting the LED assembly in
the enclosure lid to the communication assembly out
of the jack located on the communication assembly.
7. Ensure that no voltage is present at the fuses of the DC inputs between A+ and A- and
between B+ and B- as well as between C+ and C-. To do so, insert the test probe into the
screw points of the respective fuse.
8. Ensure there is no voltage on the AC-out terminal block between L1 and N and L2 and N
using a suitable measuring device. To do this, stick the test probe in each rectangular opening
of the terminal.
9. Ensure there is no voltage on the AC-out terminal block between L1 and the equipment
grounding conductor and L2 and the equipment grounding conductor using a suitable
measuring device. To do this, stick the test probe in each rectangular opening of the terminal.
Installation Manual
8 Disconnecting the Inverter from Voltage Sources
WARNING
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