System Decommissioning; Disconnecting The Inverter; Dismantling The Inverter - Sungrow SG33CX User Manual

8 System Decommissioning

8.1 Disconnecting the Inverter

For maintenance or other service work, the inverter must be switched off.
Proceed as follows to disconnect the inverter from the AC and DC power
sources. Lethal voltages or damage to the inverter will follow if otherwise.
Disconnect the external AC circuit breaker or disconnect to prevent it
Step 1
from accidentally reconnecting to the utility grid.
Rotate the DC switch to the "OFF" position for disconnecting all of the PV
Step 2
string inputs
Wait about 5 minutes until the capacitors inside the inverter have been
Step 3
discharged.
Ensure that the DC cable is current-free via a current clamp.
Step 4
Insert a MC4 wrench into the notch and press the wrench with an
Step 5
appropriate force to remove the DC connector.
Remove the AC junction box, ensure that the AC wiring terminals are
Step 6
voltage-free via a multimeter, and remove the AC wires.
Install the MC4 waterproof plugs and AC waterproof cover.
Step 7
For further disconnection and reconnection instructions, please visit the
webpage of respective component manufacturer.

8.2 Dismantling the Inverter

Refer to Chapter 5 and Chapter 6 to dismantle the inverter in reverse steps.
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