20
6
Powering On the System
1. Turn on the AC switch between the SUN2000 and the power grid.
2. Set DC SWITCH 1 at the bottom of the SUN2000 chassis to ON. When you hear a click sound,
the switch is ON.
3. Check the status of LED 1. If it is steady green, set DC SWITCH 2 and DC SWITCH 3 to ON.
4. Observe the LED indicators to check the SUN2000 operating status.
•
Before turning on the AC switch between the SUN2000 and the power grid, use a multimeter
to check that the AC voltage is within the specified range.
•
When the handle of the DC switch points to the icon, the spring of the DC switch is in
released state and the switch is not completely connected. In this case, automatic
disconnection may fail. You need to set the DC switch to the ON position.
•
Blinking at short intervals (on for 0.2s and then off for 0.2s).
•
Blinking at long intervals (on for 1s and then off for 1s).
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.
Display Category
Indicator Status
Description
PV indication
LED1
LED4
-
Steady green
-
At least one PV string is properly connected, and
the DC input voltage of the corresponding MPPT
circuit is higher than or equal to 500 V.
Blinking green
at short
intervals
Steady
red
An environmental fault occurs at DC side.
Off
-
The SUN2000 disconnects from all PV strings, or
the DC input voltage of each MPPT circuit is less
than 500 V.
Grid connection
indication
LED2
LED4
-
Steady green
-
The SUN2000 has connected to the power grid.
Blinking green
at short
intervals
Steady
red
An environmental fault occurs at AC side.
Off
-
The SUN2000 does not connect to the power grid.
Communications
indication
LED3
-
Blinking green at short
intervals
The SUN2000 receives data over RS485 or MBUS
communication.
Off
The SUN2000 has not received data over RS485 or
MBUS communication for 10 seconds.
