Why are maintenance records important for cooking fume purifiers?

Maintenance records demonstrate normal operation, cleaning intervals and fault handling, making responsibility clear during complaints or inspections. Records should include the date, cleaned parts, replaced components, responsible person and operating status. Checklist: Define capacity, accuracy, materials and operating environment before requesting quotes on a uniform basis. Request specification sheets, test reports, certificates, maintenance manuals and spare-part lists. During acceptance, verify appearance, dimensions, functions, safety protection and packaging, and keep test records. Do not compare unit price alone; include customization, freight, spare parts, after-sales support and downtime risk. Keep written records of inquiries, confirmations, FAT, acceptance and warranty commitments.