Information name

Level

Possible causes

Hardware protection

Protection

Ø Overvoltage

Ø Over-current

Ø IGBT fault

Overvoltage

Protection

Ø When multiple frequency converters run, they may be temporarily in a power generation

Ø The deceleration time is too short.

Ø Input voltage is abnormal

Ø Have energy feedback load

Ø Alarm limit parameters are set too low.

Over-speed

Protection

Ø Position cannot be identified when starting

Ø Software fault

Software over-current

Protection

Ø The over-current setting value is too low.

Under-voltage

Protection

Ø Alarm limit parameters are set too large.

Ø Input voltage is abnormal

Ø Other heavy loads start in the grid, causing the input voltage to fall

Overtemperature protection

Protection

Ø The radiator is high at front and low at back, and the heat pipe radiator doesn't work properly

Ø Overload running for long time

Ø Deficiency in draft

Ø The environment temperature is too high