Daikin VRV IV W+ Series Installer And User Reference Manual

Also see for RWEYQ10T9Y1B: Installer and user guide Installation and operation manual Installation and operation manual

11 | TroubleshootingInstaller and user reference guide38RWEYQ8~14T9Y1BVRV IV water-cooled system air conditioner4P452191-1B – 2020.1011 TroubleshootingIf one of the following malfunctions occur, take the measures shown below andcontact your dealer.WARNINGStop operation and shut off the power if anything unusual occurs (burning smellsetc.).Leaving the unit running under such circumstances may cause breakage, electricshock or fire. Contact your dealer.The system MUST be repaired by a qualified service person.If the system does NOT operate properly except for the above mentioned casesand none of the above mentioned malfunctions is evident, investigate the systemin accordance with the following procedures.Malfunction MeasureIf the system does notoperate at all.▪ Check if there is no power failure. Wait untilpower is restored. If power failure occurs duringoperation, the system automatically restartsimmediately after power is restored.▪ Check if no fuse has blown or breaker is activated.Change the fuse or reset the breaker if necessary.If the system goes into fanonly operation, but as soonas it goes into heating orcooling operation, thesystem stops.▪ Check if air inlet or outlet of outdoor or indoorunit is not blocked by obstacles. Remove anyobstacles and make sure the air can flow freely.▪ Check if the user interface display shows (timeto clean the air filter). (Refer to "10 Maintenanceand service" [4 34] and "Maintenance" in theindoor unit manual.)The system operates butcooling or heating isinsufficient.▪ Check if air inlet or outlet of outdoor or indoorunit is not blocked by obstacles. Remove anyobstacles and make sure the air can flow freely.▪ Check if the air filter is not clogged (refer to"Maintenance" in the indoor unit manual).▪ Check the temperature setting.▪ Check the fan speed setting on your userinterface.▪ Check for open doors or windows. Close doors andwindows to prevent wind from coming in.▪ Check if there are too many occupants in the roomduring cooling operation. Check if the heat sourceof the room is excessive.▪ Check if direct sunlight enters the room. Usecurtains or blinds.▪ Check if the air flow angle is proper.If after checking all above items, it is impossible to fix the problem yourself, contactyour installer and state the symptoms, the complete model name of the unit (withmanufacturing number if possible) and the installation date (possibly listed on thewarranty card).