Cause： Input voltage phase loss.
Wiring terminals of input voltage are loosened.
Input voltage drops too much.
Solution： Lower the voltage to the specified range.
Cause： Input power phase loss.
Solution： Check input power supply.
Check wiring of input power supply.
. Check if wiring terminal is loose.
Cause： Acceleration/deceleration time is too short.
In V/F control mode, the setting value of torque boost is too
Load is too heavy.
Inverter is in stall status for a long time.
Solution： Prolong acceleration/deceleration time.
Reduce setting value of torque boost.
Replace with the inverter which is applicable to the load.
Check if the motor cannot stop by other load.Replace air cooling fan.
Cause： Ambient temperature is too high.
Cooling fans are broken down.
Solution： The service environment of inverter should meet the requirements
Improve environmental ventilation,and check if the vent of inverter
Replace air cooling fan.
Cause : External device fault terminal is on.
Solution: Check external device.
makes EEPROM read-write mistakes.
EEPROM is damaged.
Solution： Press to reset, and then retry.
Technical support is required.
Cause： Motor is not connected to the output terminals of inverter.
Motor is on load.
Solution： Check connection between inverter and motor.
Motor is offloaded.
Cause： PID feedback loses.
Analog terminal of PID feedback is broken down.
PID feedback detection time is too short, fault is caused by interference.
SPI communication fault.
CI communication fault.
Solution: Check the cable between PID feedback sensor and analog terminal.
Check if the analog terminal is broken.
Increase the value of F4-31.
Power-on the inverter again after power failure.
Adjust F1-30 communication overtime .
Cause: The motor is not connected to the output terminal of inverter.
Motor vibrates severely, and 3-phase current is in serious
Solution: Check connection between inverter and motor.
Check if the motor is damaged.