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6.2 Symptoms of Warning and Fault
If a warning occurs in the product, this is displayed in the screen.
The product displays a system fault and stops the operation.
The product displays a grid fault and stops the operation.
When a fault occurs, red color is displayed at the display window Fault LED.
When a fault occurs, fault detail is displayed in the keypad window of the display window LCD.
If the inverter is damaged and becomes out of control, the machine may be neglected as a
dangerous state. In order to prevent such circumstance, safety devices such as over-current
breaker should be installed additionally.
6.3 Types of Main Faults
Input over-voltage protection
If a solar cell voltage exceeds the regulated voltage, the system is stopped to protect the
inverter.
Input under-voltage protection
If a solar cell voltage is below the regulated voltage, the system is stopped to protect the
inverter.
Output over-current protection
If over-current occurs due to the fault condition of the output current in the inverter, the
system is stopped to protect the inverter.
Inverter overheat protection
If an internal temperature in the inverter exceeds the standard value, the system operation is
stopped to prevent overheating. If an internal temperature in the inverter is returned to a
normal temperature, the system is operated normally after reset.
