Daikin VRV IV Q+ Series Installer And User Reference Manual

Also see for RXYQQ10U7Y1B: Installation and operation manual

11 | TroubleshootingInstaller and user reference guide40RXYQQ8~20U7Y1BVRV IV Q+ series heat pump4P546229-1A – 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.Malfunction MeasureIf a safety device such as a fuse, a breaker or anearth leakage breaker frequently actuates or theON/OFF switch does NOT properly work.Turn OFF the main powerswitch.If water leaks from the unit. Stop the operation.The operation switch does NOT work well. Turn OFF the power supply.If the user interface display indicates the unitnumber, the operation lamp flashes and themalfunction code appears.Notify your installer and reportthe malfunction code.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 36] and "Maintenance" in theindoor unit manual.)