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6
Powering On the System
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 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
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.
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.
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).
Display Category
PV indication
Grid connection
indication
Communications
indication
Indicator Status
LED1
LED4
Steady green
-
Blinking green
Steady
at short
red
intervals
Off
-
LED2
LED4
Steady green
-
Blinking green
Steady
at short
red
intervals
Off
-
LED3
Blinking green at short
intervals
Off
icon, the spring of the DC switch is in
Description
-
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.
An environmental fault occurs at DC side.
The SUN2000 disconnects from all PV strings, or
the DC input voltage of each MPPT circuit is less
than 500 V.
-
The SUN2000 has connected to the power grid.
An environmental fault occurs at AC side.
The SUN2000 does not connect to the power grid.
-
The SUN2000 receives data over RS485 or MBUS
communication.
The SUN2000 has not received data over RS485 or
MBUS communication for 10 seconds.
20
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