Daikin RWEYQ72PCYD Installation Manual

Contents

18 English〈Cautions for check operation〉• If the system is started within about 12 minutes after the outside/indoor units are turned ON, the compressor will not run and H2Plights up. Before starting an operation, always verify that the LED dis-play shows the contents of the table in 11-3 Check operation (6).• The system may require up to 10 minutes until it can start the com-pressor after an operation start. This is a normal operation to equal-ize the refrigerant distribution.• The check operation does not provide any means of checking theindoor units individually. For that purpose, perform normal operationusing the remote controller after the check operation.• Check operation is not possible in other modes such as collection mode.• If the setting of indoor remote controller is changed before the checkoperation, it may not be performed correctly and malfunction code“UF” may be displayed.Remote controller displays malfunction code11-4 Check of normal operationAfter the check operation is completed, operate the unit normally.Check the below items.• Make sure the indoor and outside units are operating normally (If aknocking sound can be heard in the liquid compression of the com-pressor, stop the unit immediately and then energize the heater for asufficient length of time before restarting the operation.)• Run each indoor unit one at a time and make sure the corre-sponding outside unit is also running.• Check to see if cold (or hot) air is coming out of the indoor unit.• Press the fan direction and fan strength buttons on the indoor unitto check if they operate properly.NOTE〈Cautions for normal operation check〉• Once stopped, the compressor will not restart in about 5 minuteseven if the On/Off button of an indoor unit in the same system ispressed.• When the system operation is stopped by the remote controller, the out-side units may continue operating for further 5 minutes at maximum.• If the system has not undergone any check operation by the testoperation button since it was first installed, an malfunction code“U3” is displayed. In this case, perform check operation referringto 11-3 Check operation.• After the test operation, when handing the unit over to the cus-tomer, make sure the control box cover, the inspection door, andthe unit casing are all attached.12. ONSITE SETTINGS12-1 Energy saving and optimum operationThis VRV pump system is equipped with advanced energy saving func-tionality. Depending on the priority, emphasizes can be put on energysaving or comfort level. Several parameters can be selected, resulting inthe optimal balance between energy consumption and comfort for theparticular application.[2-8]= Te target temperature during cooling operationDefault value=5Change [2-8]=2-7 in function of required operation method dur-ing cooling.[2-9]= Tc target temperature during heating operationDefault value=3Change [2-9]=1, 3 or 6 in function of required operation methodduring heating.Malfunc-tion code Installation error Remedial actionE3E4F3F6UFU2The stop valve of an out-side unit is left closed.Open the stop valve.Check referring to the table in9-9 Additional refrigerantcharge.U1The phases of the powersupply to the outsideunits are reversed.Exchange two of the threephases (L1, L2, L3) to make apositive phase connection.U1U2U4No power is supplied to anoutside, Branch Selectoror indoor unit (includingphase interruption).Check if the power supply wiring for theoutside units are connected correctly.(If the power supply wire is not con-nected to L2 phase, no malfunctiondisplay will appear and the com-pressor will not work.)Check if the ground fault circuitinterrupter in the outside unit is ON.U7UA• A model which cannot beconnected in a multi-out-side-unit system hasbeen connected in amulti-outside-unit system.• DIP switch setting ofBranch Selector unit isincorrect.• Combination with Ttype (BSQ-TVJ, BS-Q54TVJ) and Ptype(BSVQ-PVJU,BSV-Q36PVJU) causeerror.• Change to individual piping, anddisconnect the wiring from themulti-outside-unit terminals (Q1,Q2).• Set up a DIP switch referring toservice precautions of BranchSelector unit.• Configure the system with only Ttype, or only P type.UF Incorrect transmissionbetween unitsCheck if the refrigerant pipingand the unit transmission wiringare consistent with each other.E3F6UFU2Refrigerant overchargeRecalculate the requiredamount of refrigerant from thepiping length and correct therefrigerant charge level byrecovering any excessive refrig-erant with a refrigerant recoverymachine.E4F3 Insufficient refrigerant• Check if the additional refrig-erant charge has been fin-ished correctly.• Recalculate the requiredamount of refrigerant from thepiping length and add an ade-quate amount of refrigerant.U7UFIf the multi-outside-unit termi-nal is connected when thereis one outside unit installed.Remove the wiring from themulti-outside-unit terminals (Q1,Q2).UFE4The operation mode onthe remote controller waschanged before the checkoperation.Set the operation mode on allindoor unit remote controllers to“cooling.”HJ The heat source water isnot circulating.Make sure that the water pumpis running.U3 The check operation hasnot been performed. Perform the check operation.E2E3E3 is activated, so On/Off but-ton is pressed on the remotecontroller, but this does notturn E3 off. Or E2 is activated.In case of above, there is amalfunction of the compres-sor in the outside unit.Measure the insulation resis-tance of the compressor tocheck the condition of the com-pressor.Te setting (cooling operation)k h h k h h h2. 43°F (6°C) k h h h h k h3. 45°F (7°C) k h h h h k k4. 46°F (8°C) k h h h k h h5. 48°F (9°C)(default) k h h h k h k ∗6. 50°F (10°C) k h h h k k h7. 52°F (11°C) k h h h k k kTc setting (heating operation)k h h k h h h1. 106°F (41°C) k h h h h h k3. 109°F (43°C)(default) k h h h h k k ∗6. 115°F (46°C) k h h h k k h