Quanzhou Ausenist Technology Co., Ltd

Resolve YS820 E-29 by verifying nameplate data, motor wiring, control method, tuning procedure and whether safe rotation is permitted.

Diagnose YS820 E-26 sensor failure by checking signal continuity, sensor type, range, supply, wiring and pressure comparison.

Investigate YS820 E-21 overheating by checking load, airflow, ambient temperature, fan condition, carrier settings and installation environment.

Diagnose YS820 E-16 by checking motor data, pump blockage, operating point, acceleration, voltage, rotation and overload settings.

Compare variable-frequency drives and soft starters for starting current, continuous speed control, pressure regulation, cost and maintenance.

Understand how pump speed changes, check valves, valve closure and multi-pump staging affect water hammer and pressure surges.

Build distributor expertise with selection forms, application training, fault evidence, OEM options and accurate YS620/YS820 claims.

Evaluate a pump VFD factory by the quality of its selection, documentation, commissioning, troubleshooting, training and OEM change support.