YSMART CM20D - Common Fault and Handling; Undervoltage Protection and Treatment; Overload Protection and Treatment; Input Overvoltage Handling

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4. Common Fault and Handling
Under-voltage protection and treatment:
Shows up and flash on the screen means the battery voltage is lower than the under-voltage
protection voltage. The controller has enter the under-voltage protection state and the output has been
stopped.
Solution: Using solar panel or battery charger to charge battery, when the battery voltage reaches the
recovery value, the load will be on power again and enter normal working state.
Overload protection and treatment:
Shows up and flash on the screen, it means the occurrence of over current or short circuit. The
controller will stop output and enter overload protection state.
Solution: After solving the problem of output short circuit and reducing the load, press the button to
restore power to the load.
Input over voltage and handling:
shows up and flash on the screen means the battery input voltage of the controller is higher than
rated input voltage, controller will stop output and enter overvoltage protection state.
Solution: 1. please choose battery with appropriate voltage grade to connect with controller; 2. other charger
for the battery to be removed.
5. Quality Assurance
1. Quality assurance should be carried out according to the following rules: