User Manual
2 Product Introduction
9
Fig. 2-4
LCD Display Panel
No.
Name
Description
1
LED indicators
“RUN” and “FAULT”. The current state can be known from
the two indicators. Detailed definition is shown in Tab. 2-2.
2
Buttons
User can operate the LCD menu of the inverter via the two
buttons. Detailed function is shown in Tab. 10-1.
3
LCD Screen
LCD screen can display the current state, current running
information, historical information, and parameters to be
set.
Tab. 2-2
Description of LED Indicators
Name
State
Description
“RUN”
On
The inverter is feeding power to the utility grid or in derating
operation.
Blinking
The inverter is in the process of startup.
Off Other
states.
“FAULT”
On
Communication error, permanent fault, or upgrade failure.
Blinking Other
faults (alarms excluded).
Off
No fault occurs.
2.3
Technical Description
2.3.1 Circuit Description
Fig. 2-5 shows the main circuit of inverter.
The boost circuits raise the input DC voltage. Two string MPP trackers can be utilized
to ensure the maximum power from PV arrays. Then the inverter circuit converts DC
power to AC power. Three-level inverter circuit converts the DC power into AC power,
which will be fed into the utility grid via AC terminal. Meanwhile inverter is
equipped with protective circuit to guarantee its safety operation which can trigger
the AC relay if required.
Additionally, a DC switch is integrated for safe disconnection of DC current. The
inverter provides RS485 ports and NET ports for communication. Users can look up
running data and set parameters through LCD display panel.
