
4
COM Port Pin Definitions
ALARM Port Pin Definition
4 Verifying the Installation
1. Turn on the AC switch between the SUN2000L and the power grid.
2. Turn on the DC switch between the PV string and the SUN2000L if there is any.
3. Turn on the DC switch at the bottom of the SUN2000L.
4. If a battery connects to the battery terminals, turn on the power switch on the battery, and
then turn on the battery switch.
5. Perform quicksetting overthe app by referring to the SUN2000LAppQuickGuide.
6. (Optional) Measure the temperatures at the joints between the DC terminals and the
connectors using a point-test thermometer.
7. Observe the LEDs to check the SUN2000L operating status.
Before turning on the AC switch between the SUN2000L and the power grid, check that
the AC voltage on the power grid side of the AC switch is within the specified range.
5 Powering On the System
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Status (Blinking at Long
Intervals: On for 1s and then Off
for 1s; Blinking at Short
Intervals: On for 0.2s and then
Off for 0.2s)
The SUN2000L is
exporting power to the power grid.
Blinking green
at long
intervals
The DC is on and the AC is off.
Blinking green at
long intervals
The DC is off and the AC is on.
Blinking green
at long
intervals
Blinking green at
long intervals
Both the DC and AC are on, and the
SUN2000L is not exporting power to
the power grid.
Both the DC and AC are off, or the
SUN2000L is in low power
consumption mode.
Blinking green at short intervals
The SUN2000L is in communication.
Blinking green at long intervals
The SUN2000L has connected to the
mobile phone.
RS485B, RS485 differential
signal–(reserved)
RS485B, RS485 differential
signal–(reserved)
Negative of the 12 V power
supply (reserved, power ≤ 3 W)
Positive of the 12 V power
supply (reserved, power ≤ 3 W)
Grounding the shield layer
RS485B, RS485 differential
signal–
RS485A, RS485 differential
signal+
RS485B, RS485 differential
signal–
RS485A, RS485 differential
signal+
Grounding the shield layer
Under normal operation conditions of the SUN2000L, the temperature rise at DC
connectors should remain below 30°C at all time.
The SUN2000L is installed correctly and securely.
The WiFi antenna is installed correctly and securely.
Cables are routed properly as required by the customer.
Cable ties are secured evenly and no burr exists.
The ground cable is connected correctly and securely.
The DC switch and all the switches connecting to the SUN2000L
are OFF.
The AC output power cable, DC input power cable, battery
cable, and signal cable are connected correctly and securely.
Unused terminals and ports are locked by watertight caps.
The installation space is proper, and the installation environment
is clean and tidy, without foreign matter.
Customer Service Contact Information
The United
States and
Canada
The Middle
East and
Africa
mea_inverter_support@huawei.com