Sungrow SG320HX, User Manual

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8
System Decommissioning
8.1 Disconnecting the Inverter
Danger of burns!
Even if the inverter is shut down, it may still be hot and cause burns. Wear protec-
tive gloves before operating the inverter after it cools down.
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.
step 1 Disconnect the external AC circuit breaker and secure it against reconnection.
step 2 Rotate the DC switch to the "OFF" position for disconnecting all of the PV string inputs.
step 3 Wait about 25 minutes until the capacitors inside the inverter completely discharge.
step 4 Ensure that the DC cable is current-free via a current clamp.
- - End
8.2 Dismantling the Inverter
Risk of burn injuries and electric shock!
After the inverter is powered off for 25 minutes, measure the voltage and current
with professional instrument. Only when there is no voltage nor current can opera-
tors who wear protective equipment operate and maintain the inverter.
Before dismantling the inverter, disconnect both AC and DC connections.
If there are more than two layers of inverter DC terminals, dismantle the outer DC
connectors before dismantling the inner ones.
step 1 Refer to " 5 Electrical Connection " , for the inverter disconnection of all cables in reverse
steps. In particular, when removing the DC connector, use an MC4-Evo2 wrench to loosen
the locking parts and install waterproof plugs.