1 Frequency inverter for fan and pump 2 With ISO,CE,CCC ... communication interface 4 PID control function ZY-P800F Fan and pump series(0.75-450KW)With advanced ... -P800F series are effectively applied on the field of fan and pump loads. Main function. Single-pump mode: ... current, AC drives over-load, motor over-load, over-heat, motor detection fault, external equipment fault, external disturbance, water ...