Daikin RZAG71L7V1B Reference Manual

Also see for RZAG100L7V1B: Service manual

Daikin RZAG71L7V1B Reference Manual Manual pdf 23 page image

8 Hand-over to the userInstaller reference guide23RZAG71~140L7V1BSplit system air conditioners4P418663-1 – 2016.02Error code Possible causeU2 ▪ There is a voltage imbalance.▪ There is a missing phase in case ofthree-phase power supply units. Note:Operation will be impossible. Turn OFFthe power, recheck the wiring, and switchtwo of the three electrical wires.U4 or UF The inter-unit branch wiring is not correct.UA The outdoor and indoor unit areincompatible.8 Hand-over to the userOnce the test run is finished and the unit operates properly, pleasemake sure the following is clear for the user:▪ Make sure that the user has the printed documentation and askhim/her to keep it for future reference. Inform the user that he canfind the complete documentation on the url as earlier described inthis manual.▪ Explain the user how to properly operate the system and what todo in case of problems.▪ Show the user what to do in relation to maintaining the unit.9 Maintenance and serviceNOTICEMaintenance must be done by an authorised installer orservice agent.We recommend to do maintenance at least once a year.However, applicable legislation might require shortermaintenance intervals.NOTICEIn Europe, the greenhouse gas emissions of the totalrefrigerant charge in the system (expressed as tonnesCO2-equivalent) is used to determine the maintenanceintervals. Follow the applicable legislation.Formula to calculate the greenhouse gas emissions:GWP value of the refrigerant × Total refrigerant charge [inkg] / 10009.1 Overview: Maintenance andserviceThis chapter contains information about:▪ The yearly maintenance of the outdoor unit9.2 Maintenance safety precautionsDANGER: RISK OF ELECTROCUTIONDANGER: RISK OF BURNINGNOTICE: Risk of electrostatic dischargeBefore performing any maintenance or service work, toucha metal part of the unit in order to eliminate static electricityand to protect the PCB.9.3 Checklist for yearly maintenanceof the outdoor unitCheck the following at least once a year:▪ Outdoor unit heat exchanger.The heat exchanger of the outdoor unit can get blocked up due todust, dirt, leaves, etc. It is recommended to clean the heatexchanger yearly. A blocked heat exchanger can lead to too lowpressure or too high pressure leading to worse performance.10 Troubleshooting10.1 Overview: TroubleshootingIn case of problems:▪ See "7.5 Error codes when performing a test run" on page 22.▪ See the service manual.Before troubleshootingCarry out a thorough visual inspection of the unit and look forobvious defects such as loose connections or defective wiring.10.2 Precautions when troubleshootingWARNING▪ When carrying out an inspection on the switch box ofthe unit, always make sure that the unit is disconnectedfrom the mains. Turn off the respective circuit breaker.▪ When a safety device was activated, stop the unit andfind out why the safety device was activated beforeresetting it. NEVER bridge safety devices or changetheir values to a value other than the factory defaultsetting. If you are unable to find the cause of theproblem, call your dealer.DANGER: RISK OF ELECTROCUTIONWARNINGPrevent hazard due to the inadvertent resetting of thethermal cut-out: this appliance must NOT be suppliedthrough an external switching device, such as a timer, orconnected to a circuit that is regularly turned ON and OFFby the utility.DANGER: RISK OF BURNING11 Disposal11.1 Overview: DisposalTypical workflowDisposing of the system typically consists of the following stages:1 Pumping down the system.2 Dismantling the system according to the applicable legislation.3 Treating the refrigerant, oil and other parts according to theapplicable legislation.INFORMATIONFor more details, see the service manual.