Service & Support
2-hour response, on site within 48 hours, with service centers in Beijing and Xi'an. From selection and commissioning to spare-part replacement years later, AOYI's in-house NSA series box transformer monitoring units are supported directly by the manufacturer throughout their life — plants in service for more than ten years can still obtain original-model spare parts.
Service centers in Beijing and Xi'an
Covering the renewable energy bases of North and Northwest China, with factory engineers responding from nearby.
- 2hresponse
- 48hon site
- Factory serviceDesigned and built in-house — issues go straight to our R&D team
- Remote diagnosisEngineers troubleshoot remotely; where a board swap will fix it, we ship the part directly
- Long-term spare partsContinued supply for all three generations, replaced with the original model
Selection support
We recommend configurations based on the project's number of box-type transformers, communication network and monitoring requirements. Every configuration can be customized for the project.
Compare the three products ›Documentation and commissioning
Technical manuals, Modbus communication protocols and PC configuration software are provided; MODBUS-RTU, IEC 60870-5-103/104 and IEC 61850 are supported for easy integration with the plant SCADA system.
Downloads ›Warranty and repair
Free repair or replacement within 12 months of energization or 18 months of shipment, whichever comes first; 2-hour response, on site within 48 hours.
Warranty terms ›Long-term spare-part supply
All three generations — NSA6000, NSA2 and NSA3 — are developed and manufactured in-house, and spare parts remain available; plants in service for many years can still replace boards with the same model.
Troubleshooting ›
Warranty Terms
- Warranty period
- Twelve (12) months from the date of energization or eighteen (18) months from the date of shipment, whichever occurs first, unless otherwise specified in the contract.
- Warranty coverage
- Should the product fail under normal use during the warranty period, AOYI shall repair or replace it free of charge and, where necessary, dispatch qualified personnel to provide on-site service at the project location.
- Paid repair
- Repairs shall be chargeable in the following cases: (1) faults or damage caused by human factors, or by storage or use in abnormal natural environments; (2) faults or damage caused by improper installation or use; (3) faults or damage caused by modification, disassembly or reassembly by the user.
- Response time
- AOYI shall respond within 2 hours of receiving a service request and, where on-site service is required, arrive on site within 48 hours.
- Service centers
- Beijing and Xi'an.
- After the warranty period
- AOYI shall continue to provide repair, spare parts and technical support services.
Service Request Process
- 1Initial diagnosisUse the troubleshooting table to identify which board to check from the symptoms, and rule out external causes such as wiring errors or loose terminals.
- 2Contact usBy phone, email or online chat, tell us the project name, product model and fault symptoms; site photos are welcome.
- 3Remote diagnosisWe respond within 2 hours and our engineers troubleshoot remotely; where a board can be replaced on site, we ship the spare part directly.
- 4Repair or replacementRepair or replacement under the warranty terms; where on-site service is required, we arrive within 48 hours.
FAQ
What is the warranty period for AOYI box transformer monitoring units?
12 months from energization or 18 months from shipment, whichever comes first.
What happens if a unit fails during the warranty period?
If the product fails under normal use during the warranty period, AOYI repairs or replaces it free of charge and, where necessary, sends engineers to the project site.
How quickly do you respond and reach the site?
We respond within 2 hours of a service request and, where on-site service is needed, arrive within 48 hours. AOYI has service centers in Beijing and Xi'an.
Which cases require paid repair?
Faults or damage caused by human factors or by storage or use in abnormal natural environments; faults or damage caused by improper installation or use; and faults or damage caused by modification, disassembly or reassembly by the user.
Are spare parts still available for older models?
Yes. All three generations — NSA6000, NSA2 and NSA3 — are developed and manufactured in-house, with continued spare-part supply and after-sales service; plants in service for many years can still replace boards with the same model.
Where can I download manuals, protocols and configuration software?
On our Downloads page: technical manuals for all three products, Modbus communication protocols, PC configuration software, and a troubleshooting table that maps fault symptoms to boards.
Contact Us
- Phone+86 10 8646 1328
- Emailsales@aoyipower.com
- Online chatWeCom customer service
- Address3B12-2, Yinhe Port Sci-Tech Innovation Center, No. 9 Jinghai 6th Road, Beijing Economic-Technological Development Area, Beijing 100176, China