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- User Manual
Ldsolar LD2420C User Manual
Summary of LD2420C
Page 1
0 instruction of solar charge controller user’s manual 12v/24v 10a/20a dear users: thank you for selecting our product. Please read this manual carefully before you use this product..
Page 2: Major Functions
1 major functions the controller is for off-grid solar system and control the charging and discharging of the battery. Main function is protecting battery. The intelligent charging process has been optimized for long battery life and improved system performance. The features are listed below: automa...
Page 3
2 important safety information charging and discharging voltage automatically, improving the battery lifetime. Roundly reverse connected protection. Solar panels, battery, solar charge controller positive poles are all connected together, adopting negative mosfet in series control circuit. It is bet...
Page 4: The Suggestion Of Using
3 the suggestion of using short circuit the positive and negative pole of battery. Suggest to adding a fuse between battery and controller. (slow motion type, the action current of the fuse should be 1.5 times rated current of controller.) the controller could detect the temperature of environment t...
Page 5
4 the feature of lcd graphic symbol 1. The default night display of controller: when the solar panel input voltage have been detected by controller less than sensor identification point voltage, this graphic symbol will be light. 2. The default daytime display of controller: when the solar panel inp...
Page 6
5 4. The indicator of battery parameter: when the battery parameter was displaying, this graphic symbol will be light. For example the voltage of battery, temperature of battery. 5. The indicator of load parameter: when the load parameter was displaying, this graphic symbol will be light. 6. System ...
Page 7: Installation Instructions
6 installation instructions have output, this graphic symbol will be light. 14. The indicator of capacity of battery: when the battery was in different capacity, the strip-type will show. 15. The indicator of charge status: when the controller is charging, the symbol will be light, float charge will...
Page 8: Controller Connection
7 controller connection 1) all terminals are in tight status after factory, in order to well connected, please loose all terminals at first. 2) the following order of connection please do not free change, or cause system voltage recognition fault. 3) as figure, first connected the battery to control...
Page 9
8 connection is correct, the lcd displaying will show battery voltage and other technical data. If lcd no indicate, please check the fault. The length of cable between battery and controller as shorter as possible. Suggest to 30cm -100cm. If short circuit happened on the terminals of controller, it ...
Page 10
9 not connect any load with controller at that time, or the load and controller will be destroyed. 4) as figure, connected solar panels with controller correctly, if the connection is successful and sunshine is full, the lcd will show solar panel and an arrow from solar panel to battery will be ligh...
Page 11: Operation And Indication
10 operation and indication positive combined together. If your solar system needs ground connection, please let positive ground connection. Warning: for some force to ground connected system, such as solar communication system, portable solar system, they are negative ground connected, at this time...
Page 12: “
11 “ ” more than 5s at main interface, it will speed auto exchange. Loose button will stop speed. Press “ ” under main interface could open or close the load output 。 press “ ”button could join into next menu under main interface.
Page 13: Float Voltage Set Up
12 a) float voltage set up this parameter is high voltage disconnection (hvd) voltage.(boost state voltage will be increase 0.6v base on hvd) the controller will be started pwm function at this point(hvd), limited voltage rising. Press “ ” join in float voltage menu. Long press.
Page 14: “
13 “ ” button≥5s, the parameter on the interface will be flash, here is set up state. Loose the button, press “ ” button again could operate plus data, press “ ” button could operate minus data. After finish the needed technical data, long press “ ” button again ≥5s, the parameter save and come out ...
Page 15: Above A
14 working. At the same time, the status of controller is in lock. Users have to charge the battery, when the battery voltage is higher than lvd voltage or press“ ”button force to release. The load output will be back. The procedure is same with (a). Above a 、 b 、 c three parameter default data was ...
Page 16: System Voltage Select
15 time set to ≤23h, it means the load start timer or sensor function. If the battery capacity is enough, the load will be started at sunset. The load will work under timer setting hours or stop working till sunrise. When the load join into timer or sensor mode, if the reset working time more than a...
Page 17: “
16 when battery voltage is more than 18v, the controller will be auto change to 24v system with 24v control data.When battery voltage is less than 18v, the controller will be auto change to 12v system with 12v control data. If the system voltage is set to “ 1 ” , the controller will be work under 12...
Page 18
17 come back or press “ ”button force to unlock at main interface. Battery over voltage disconnection (ovd) when the voltage of battery more than 16.5v, the over voltage protection will be started. The load cut off, at the same time the load and warning symbol flash. When the voltage of battery was ...
Page 19: (Hvd)
18 high voltage disconnection protection (hvd) when the battery was charged to 13.8v, the pwm function will be started, the charge symbol will be flash, and the voltage of battery has been limited. Common fault and handling fault phenomen on possible reason solution lcd no display after connected wi...
Page 20: Technical Data
19 technical data full of sunshine vertical on solar panel, no solar symbol and no charge symbol on lcd. The solar panel connection open circuit, short circuit, or reverse connected please check the cable of solar panels if they are correct connection and firmly. The controller displaying lvd the ba...
Page 21
20 max. Charge current 10a 20a max. Discharge current 10a 20a lvd 11.0v adj 9v….12v ； ×2 24v lvr 12.6v adj 11v….13.5v ； ×2 24v float voltage 13.8v adj 13v….15v ； ×2 24v boost charging 14.4v ； ×2 24v battery voltage less than 12vstart boost charging 2 hours battery over voltage protection 16.5v ； ×2 ...