90
The universal motor runs at low
speed for a long time with high load
For long-time low-speed running, a specialized
motor should be used
The grid voltage is too low.
The V/F curve is improper.
Set the V/F curve and torque boost correctly
The read/write error of the control
parameters occurs.
Reset by pressing the STOP/RESET key, and seek
for technical support
The grid voltage is too low.
The contactor is damaged.
Change the main circuit contactor, and seek for
technical support
The power-on buffering resistor is
damaged.
Change the buffering resistor, and seek for
technical support
The control circuit is damaged.
Seek for technical support
The AI signal is disconnected or too
weak (lower than 2 mA) when AI
current is set as the main frequency
reference or the torque reference
Check the wiring or adjust the input source of
reference signals
Short circuit of
control board
24 V power
Check the wiring between P24 and COM
The interface board is damaged.
Change the interface board and seek for
technical support