Changzhou Lima Automation Co

Model series Fuji inverter fault code
Fault code display content Protection action content
Overcurrent during acceleration The motor has overcurrent, the output circuit is short-circuited between phases or to ground, and the instantaneous value of the inverter output current is greater than the overcurrent detection value , the overcurrent protection function operates.
Overcurrent during deceleration
Overcurrent during constant speed
Short circuit to ground fault detection The inverter output circuit operates when the output circuit is short circuited to ground
Overvoltage during acceleration due to the increase in the regenerative current of the motor, causing When the DC voltage of the main circuit reaches the overvoltage detection value, the protection will operate. However, if an excessively high voltage is mistakenly input to the input side of the inverter, the protection will not operate.
Overvoltage during deceleration
Overvoltage during constant speed
Undervoltage When the power supply voltage decreases and the DC voltage of the main circuit drops below the undervoltage detection value, the protection function operates
Power supply shortage If the power supply loses a phase, the frequency converter will operate in a voltage unbalanced state, which may cause damage to the main circuit rectifier diode and filter capacitor. In this case, the frequency converter will alarm and stop running
The heat sink is overheated, such as the cooling fan. If a fault occurs, the internal temperature of the inverter will rise and the protection will operate. External alarm When the control circuit terminal is connected to the normally closed contact of external equipment such as the braking resistor of the braking unit, it will act according to the signals of these contacts.
Overheating in the inverter
If the ventilation and heat dissipation in the inverter is poor, the internal temperature of the inverter will rise and the protection will operate
Overheating of the braking resistor. If the braking resistor is used frequently, its temperature will rise. To prevent The braking resistor is burned out and the protection operates.
Frequency converter overheating
This is the temperature protection of the semiconductor components of the main circuit of the frequency converter. It operates when the output current of the frequency converter exceeds the overload rating.
Fuse breakage When the internal fuse is damaged due to internal circuit short circuit or other reasons, the protection will operate.
Memory exception When a data writing error occurs in the memory, protection will take place.
Panel communication abnormality When there is an error in the transmission between the keyboard panel and the control part, the protection will take action.
When an abnormality occurs due to interference or other reasons or an error occurs, the protection operates.
Option communication abnormality When the option card is used incorrectly, the protection will operate.
Option exception
Operation error forced stop The inverter stops running by the forced stop command.
When the output circuit self-tuning is poor, if the wiring between the inverter and the motor is open or wrong, the protection will take action.
Communication abnormality An error occurred when using communication, and protection action occurred.