Huawei SUN2000-40KTL-M3 - System Power-On

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System Power-On
Before turning on the AC switch between the solar inverter and the power grid, check that the
AC voltage is within the specified range using a multimeter set to the AC position.
1. Turn on the AC switch between the solar inverter and the power grid.
2. (Optional) Remove the locking screw beside the DC switch. Store the screws properly for
future power-off maintenance.
3. Turn on the DC switch at the bottom of the solar inverter.
4. Observe the LED indicators to check the operating status of the solar inverter.
Category
Status (Blinking Slowly: On for 1s and then
Off for 1s; Blinking Fast: On for 0.2s and
then Off for 0.2s)
Description
Running indicator
–
Steady green
Steady green
The solar inverter is operating in
grid
-tied mode.
Blinking green
slowly
Off
The DC is on and the AC is off.
Blinking green
slowly
Blinking green slowly
Both the DC and AC are on, and
the solar inverter is not supplying
power to the power grid.
Off
Blinking green slowly
The DC is off and the AC is on.
Off
Off
Both the DC and AC are off.
Blinking red fast
–
DC environment alarm
–
Blinking red fast
AC environment alarm
Steady red
Steady red
Fault
Communications
indicator
–
Blinking green fast
Communication is in progress.
Blinking green slowly
Mobile phone access
Off
No communication
Note: If LED1, LED2, and LED3 are steady red, the solar inverter is faulty and needs to be replaced.