When LED2 is steady green (meaning that the inverter is grid-tied), do not turn on
any DC switch. Otherwise, the inverter may be damaged because the insulation
resistance is not detected.
● Before the equipment is put into operation for the rst time, ensure that the
parameters are set correctly by professional personnel. Incorrect parameter
settings may result in noncompliance with local grid connection requirements
and aect the normal operations of the equipment.
● Before turning on the AC switch between the inverter and the power grid,
check that the AC voltage is within the specied range using a multimeter.
● If the solar inverter has not been running for more than half a year after being
mounted, it must be checked and tested by professionals before being put into
operation.
●
Do not turn the DC switch to the unloaded position
.
● When the system is powered on or running, do not place obstacles (such as
cables) to block the rotation of the handle or manually hold the handle.
Otherwise, the DC switch cannot be automatically disconnected.
Procedure
Step 1 Turn on the AC switch between the inverter and the grid.
If you perform Step 2 before Step 1, the inverter reports a fault about abnormal
shutdown. The inverter can start normally after the fault is automatically cleared.
Step 2 Set DC SWITCH 1 (MAIN SWITCH) at the bottom of the SUN2000 chassis to ON.
When you hear a click sound, the switch is ON.
Step 3 Check the status of LED 1. If it is steady green, set DC SWITCH 2 and DC SWITCH
3 to ON.
----End
SUN2000-(175KTL-H0, 185KTL-INH0, 185KTL-H1)
User Manual 6 System Commissioning
Issue 19 (2023-12-20) Copyright © Huawei Technologies Co., Ltd. 65
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