Quanzhou Ausenist Technology Co., Ltd YS620 vs YS820: Which Ausenist Water Pump VFD Should You Choose?
Choose between YS620 and YS820 from the exact motor, supply, sensor, communication and pump-system requirements. Both are pump-focused constant-pressure drives, but their documented model tables, terminals and configuration details are not identical. The safest purchasing method is to submit a motor and application matrix for factory confirmation.
Shared Pump-Control Capabilities
Both series are designed around pressure-controlled water pumping and support core functions such as:
- Built-in PID constant-pressure control
- Sleep and wake behavior
- Water-shortage protection
- Multi-pump coordination
- Pressure-sensor feedback
- Master/auxiliary operation
- Protection and fault monitoring
They are therefore considered for booster systems, industrial water supply, irrigation, pump OEM packages and distribution projects.
Where the Documentation Emphasizes Different Strengths
| Decision area | YS620 | YS820 |
|---|---|---|
| Standard model table | Clearly lists 220V 0.75-2.2kW and 380V 0.75-7.5kW choices | Manual size table identifies 220V 0.75-2.2kW and 380V 4-7.5kW groups |
| Multi-pump architecture | Documents one master controlling up to four auxiliary drives through RS485 | Documents up to four auxiliaries, single/double master settings and linkage terminals |
| Motor-control emphasis | V/F control is specified in the technical table | Parameter set explicitly covers asynchronous V/F and synchronous vector control |
| Environmental function | Water-shortage, pressure and energy-saving functions are emphasized | Anti-freeze and automatic alarm recovery settings are explicitly listed |
Ausenist's internal business notes also identify communication-configuration differences between some low-power YS620 and YS820 models. Because terminals may vary with voltage and power, the ordered model should be confirmed rather than inferred from the series name.
Five Questions That Decide the Series
- What are the motor voltage, current, power and motor type?
- Is the supply single-phase 220V, three-phase 380V or a custom requirement?
- How many pumps must communicate?
- Is PMSM control required?
- Which sensor and external communication interfaces are needed?
OEM and Distributor Selection
For a private-label project, compare not only drive price but also model coverage, repeatable parameters, packaging, documentation and technical support. Ausenist can evaluate OEM/ODM requirements for either series after the electrical and control specification is clear.
Send motor plates, pump curves, sensor details, pump quantity, target countries and customization requirements for a series and model recommendation.
A Decision Tree for Overseas Buyers
First identify motor type. If the project requires explicit PMSM vector-control parameters, the YS820 documentation provides that path. Next confirm voltage, power and current against the exact model table. Then list required sensor inputs, pump-link communication and any external serial connection. Finally, review environmental and protection functions.
Low-Power Communication Requirements
Ausenist's business comparison notes distinguish the communication configuration of some low-power YS620 and YS820 units. Buyers that need both pump linkage and external monitoring should state this clearly. The factory should confirm the terminals on the precise voltage and power model rather than relying on a general series brochure.
Standardization Across a Pump Catalog
A manufacturer may choose one series for small pumps and another for PMSM or special control packages. That can be more practical than forcing one series across every motor. The OEM matrix should control drive selection by pump model and keep spare-parts implications visible.
Compare Commissioning Work
Review which motor data, sensor settings and multi-pump parameters are required for each series. A technically capable distributor should be able to explain the difference and provide a repeatable startup checklist, not only quote model numbers.
Confirm Current Documentation
Manuals can be revised and configurations may differ by market. Request the manual, wiring information and model-specific rating table with the quotation. If internal sales notes and a formal manual appear inconsistent, use factory confirmation for the ordered model.
Buyer FAQ
Is YS820 automatically better because it has a higher series number? No. Choose by application and exact specifications.
Can YS620 and YS820 be mixed in one pump group? Do not assume interoperability. Ask Ausenist to review the communication and control design.
From VFD Manufacturer to Water-Control Specialist
A credible inverter expert explains the complete control loop. Electrical power is converted into controlled motor speed; the pump converts that speed into flow and head; the sensor reports pressure; and PID adjusts the next command. A problem in any link can appear to the user as a “VFD problem.”
Ausenist uses the YS620 and YS820 to address this complete chain. Model selection checks voltage and current, while application review covers pump capability, sensor quality, sleep behavior, water-shortage response and multi-pump roles. The objective is stable operation that can be commissioned and serviced logically.
This expertise is particularly useful to distributors. Instead of competing only on price, they can collect the right project data, explain functions accurately and send the factory a structured support case. That improves buyer confidence and protects the reputation of the pump package.
Compare Complete Solutions, Not Series Names Alone
A meaningful comparison uses the exact ordered models. Check input and output voltage, rated current, motor-control method, sensor inputs, communication terminals, multi-pump roles and environmental installation requirements. A feature shown for one power range should not automatically be assumed for every unit in the series.
Buyers should also compare the support process. A pump-VFD specialist asks for motor plates, pump curves, pressure requirements and a system diagram before confirming selection. For OEM supply, it should be possible to define a repeatable parameter and documentation package.
The best choice is the model that meets the application with clear assumptions and an approved commissioning plan. Price matters, but an incorrectly selected drive can create much larger costs in service visits, production delays and damaged confidence.
Create a Technical RFQ, Not Only a Price Request
A useful request for quotation states the problem the pump system must solve. Include minimum and peak flow, pressure or head, water source, motor data, grid, sensor and control sequence. If replacing an existing drive, add its model, fault history and photographs of the installation.
International buyers should identify destination, voltage tolerance, frequency, language and required certification. For private label, provide the product matrix and forecast rather than one logo. Ausenist can then evaluate whether the requirement is standard YS620/YS820 supply, parameter preparation or engineering customization.
Review the answer for technical completeness. It should identify the proposed model and rating, assumptions, required accessories, commissioning responsibilities and unresolved questions. This makes quotations comparable and reduces later scope disputes.
Evidence of Specialist Support
Look for a logical selection form, model-specific wiring information, parameter records and a fault-data checklist. These tools show that the supplier understands how pumps, motors and VFD control interact after the sale.
Turn Each Project Into Reusable Engineering Knowledge
After commissioning, document what was selected and why. Store the pump curve, motor data, sensor, pressure target, key protection values and observed results. Note any site condition that changed the original plan. This project record supports faster and safer selection when a similar request arrives.
For distributors, a small library of verified applications is more valuable than broad unsupported claims. It allows sales teams to discuss real engineering conditions while protecting confidential customer information. It also shows where a new project requires factory review.
Ausenist's YS620 and YS820 content should follow the same principle: explain operating conditions, avoid invented performance numbers and invite buyers to submit the data needed for a confirmed solution.