1) exceed warranty period
2) damages caused by unauthorized disassembly or maintenance
3) dropping and breaking of the device, burning of PCB, and soaking of whole device.
4) damages caused by improper installation, usage, maintenance and storage
5) SN. tag or warranty tag of the device gets torn up or blurs up
6) the warranty voucher is inconsistent with the product model or the warranty voucher is altered
7) damages caused by force majeure
VIII Maintenance Records
Maintenance Records
Maintenance Unit
Repair Date
SN
Repair Engineer
Failures
Repair Situations