Important Notes

Before the equipment is put into operation for the first time, ensure that the parameters are set correctly by professional personnel. Incorrect parameter settings may result in noncompliance with local grid connection requirements and affect the normal operations of the equipment.

Before turning on the AC switch between the SUN2000 and the power grid, check that the AC voltage is within the specified range using a multimeter.

Procedure

1. If a battery is connected, turn on the battery switch.
2. Turn on the AC switch between the SUN2000 and the power grid.

   If the DC is on and the AC is off, the SUN2000 reports a Grid Failure alarm. The SUN2000 starts normally only after the fault is automatically rectified.

3. (Optional) Remove the locking screw from the DC switch.
   Figure 6-1 Removing the locking screw from a DC switch
   

4. Turn on the DC switch (if any) between the PV string and the SUN2000.
5. Turn on the DC switch at the bottom of the SUN2000.
6. Wait for about 1 minute and observe the LED indicators on the SUN2000 to check its running status.
   Table 6-2 LED indicator description

   Category	Status			Meaning
   Running indication	LED1	LED2		N/A
   	Steady green	Steady green		The SUN2000 is operating in grid-tied mode.
   	Blinking green at long intervals (on for 1s and then off for 1s)	Off		The DC is on and the AC is off.
   	Blinking green at long intervals (on for 1s and then off for 1s)	Blinking green at long intervals (on for 1s and then off for 1s)		The DC is on, the AC is on, and the SUN2000 is not exporting power to the power grid.
   	Off	Blinking green at long intervals (on for 1s and then off for 1s)		The DC is off and the AC is on.
   	Steady orange	Steady orange		The SUN2000 is operating in the off-grid mode.
   	Blinking orange slowly	Off		The DC is on, and the SUN2000 has no output in the off-grid mode.
   	Blinking orange slowly	Blinking orange slowly		The SUN2000 is operating in the overload in backup mode.
   	Off	Off		Both the DC and AC are off.
   	Blinking red at short intervals (on for 0.2s and then off for 0.2s)	N/A		There is a DC environmental alarm, such as an alarm indicating that High String Input Voltage, String Reverse Connection, or Low Insulation Resistance.
   	N/A	Blinking red at short intervals (on for 0.2s and then off for 0.2s)		There is an AC environmental alarm, such as an alarm indicating Grid Undervoltage, Grid Overvoltage, Grid Overfrequency, or Grid Underfrequency.
   	Steady red	Steady red		Fault
   Communication indication	LED3			N/A
   	Blinking green at short intervals (on for 0.2s and then off for 0.2s)			Communication is in progress. (When a mobile phone is connected to the SUN2000, the indicator first indicates that the phone is connected to the SUN2000): blinks green at long intervals.)
   	Blinking green at long intervals (on for 1s and then off for 1s)			The mobile phone is connected to the SUN2000.
   	Off			There is no communication.
   Device replacement indication	LED1	LED2	LED3	N/A
   	Steady red	Steady red	Steady red	The SUN2000 hardware is faulty. The SUN2000 needs to be replaced.

   If the off-grid load is overloaded, indicators LED1 and LED2 on the inverter blink orange slowly. Reduce the off-grid load power and manually clear the alarm or until the inverter is recovered. The inverter attempts to restart at an interval of 5 minutes. If the inverter fails to restart for three times, the interval changes to 2 hours. If the inverter is standby in off-grid mode, check the inverter alarms and rectify the fault.

7. (Optional) Observe the LED indicator on the Smart Dongle to check its running status.
   • WLAN-FE Smart Dongle
     Figure 6-2 WLAN-FE Smart Dongle
     
     Table 6-3 Indicator description

     Indicators	Status	Remarks	Description
     -	Off	Normal	The Smart Dongle is not secured or not powered on.
     Yellow (blinking green and red simultaneously)	Steady on		The Smart Dongle is secured and powered on.
     Red	Blinking at short intervals (on for 0.2s and then off for 0.2s)		The parameters for connecting to the router are not set.
     Red	Steady on	Abnormal	The Smart Dongle is faulty. Replace the Smart Dongle.
     Blinking red and green alternatively	Blinking at long intervals (on for 1s and then off for 1s)	Abnormal	No communication with the SUN2000 Remove and then insert the Smart Dongle. Check whether the SUN2000 matches the Smart Dongle. Connect the Smart Dongle to another SUN2000. Check whether the Smart Dongle is faulty or the USB port of the SUN2000 is faulty.
     Green	Blinking at long intervals (on for 0.5s on and then off for 0.5s)	Normal	Connecting to the router.
     Green	Steady on		Connected to the management system.
     Green	Blinking at short intervals (on for 0.2s and then off for 0.2s)		The SUN2000 communicates with the management system through the Smart Dongle.

   • 4G Smart Dongle
     Table 6-4 Indicator description

     Indicators	Status	Remarks	Description
     -	Off	Normal	The Smart Dongle is not secured or not powered on.
     Yellow (blinking green and red simultaneously)	Steady on	Normal	The Smart Dongle is secured and powered on.
     Green	The blinking interval is 2s. The indicator is on for 0.1s and then off for 1.9s alternately.	Normal	Dialing (lasting for less than 1 minute)
     		Abnormal	If the duration is longer than 1 minute, the 4G parameter settings are incorrect. Reset the parameters.
     	Blinking at long intervals (on for 1s and then off for 1s)	Normal	The dialup is successful (lasting for less than 30s).
     		Abnormal	If the duration is longer than 30s, the management system parameters are incorrectly set. Reset the parameters.
     	Steady on	Normal	Connected to the management system.
     	Blinking at short intervals (on for 0.2s and then off for 0.2s)		The SUN2000 communicates with the management system through the Smart Dongle.
     Red	Steady on	Abnormal	The Smart Dongle is faulty. Replace the Smart Dongle.
     	Blinking at short intervals (on for 0.2s and then off for 0.2s)		The Smart Dongle has no SIM card or the SIM card is in poor contact. Check whether the SIM card has been installed or is in good contact. If not, install the SIM card or remove and insert the SIM card.
     	Blinking at long intervals (on for 1s and then off for 1s)		The Smart Dongle fails to be connected to a management system because the SIM card has no signals, weak signal strength, or no traffic. If the Smart Dongle is reliably connected, check the SIM card signal through the SUN2000 app. If no signal is received or the signal strength is weak, contact the carrier. Check whether the tariff and traffic of the SIM card are normal. If not, recharge the SIM card or buy traffic.
     Blinking red and green alternatively	Blinking at long intervals (on for 1s and then off for 1s)		No communication with the SUN2000 Remove and then insert the Smart Dongle. Check whether the SUN2000 matches the Smart Dongle. Connect the Smart Dongle to another SUN2000. Check whether the Smart Dongle is faulty or the USB port of the SUN2000 is faulty.