ToughTek: P20, P30, P30ht, P30X, P40
Lv : Low Voltage
Incoming voltage low
Check whether the input voltage falls within the AC motor drive rated input voltage range.
Poor motor load
Check for abnormal load in motor.
Loss of power to 1 leg of power
Check for correct wiring of input power to R-S-T (for 3-phase models) without phase loss.