... air conditioning Maintenance Manual DCU80? ? ?100 UDCU02. 01GB B:24 UDCU02. 01GB Maintenance Manual DCU80? ? ?100 C:1 C Preventive maintenance Contents C Preventive maintenance Preventive maintenance ... Lubrication 1000 hours C:16 Checking for cracks C:18 Maintenance Manual DCU80? ? ?100 UDCU02. 01GB C:2 UDCU02. 01GB Maintenance Manual DCU80? ? ?100 C Preventive maintenance – Preventive maintenance. .. Feedback A:9 Maintenance Manual DCU80? ? ?100 UDCU02. 01GB A:2 UDCU02. 01GB Maintenance Manual DCU80? ? ?100 A Foreword – Foreword A:3 A Foreword About the maintenance manual General Thank you