Panasonic U-4LE1R8 Service Manual

Also see for S-106ME1E5: Installation instructions Instruction manual Service manual Service manual Service manual

Panasonic U-4LE1R8 Service Manual Manual pdf 42 page image

Mini VRF SYSTEMTrouble Diagnosis33-21. Contents of Remote Controller Switch Alarm DisplayRemote controller isdetecting error signal fromindoor unit.Indoor unit is detecting errorsignal from outdoor unit.Improper setting of indoor unitor remote controller .During auto address setting,number of connected unitsdoes not correspond tonumber set.When turning on the powersupply, number of connectedunits does not correspond tonumber set.(Except R.C. address is “0.”)Indoor unit communicationerror of group control wiringImproper setting<>E04E08<>E12E15E16E24E26E29E30E25E18L04L05L06L07L08<>Indoor unit is detecting error signal from remote controller (and system controller).Error in receiving serial communication signal(Signal from main indoor unit in case of group control)Ex: Auto address is not completed.Error in transmitting serial communication signalError in receiving serial communication signalWhen turning on the power supply, the number of connectedindoor units does not correspond to the number set. (Except R.C.address is “0.”)Indoor unit address setting is duplicated.Remote controller address connector (RCU. ADR) is duplicated.(Duplication of main remote controller)Starting auto address setting is prohibited.This alarm message shows that the auto address connectorCN-A.ADD is shorted while other RC line is executing autoaddress operation.Error in auto address setting (Number of connected indoor unitsis less than the number set.)Error in auto address setting (Number of connected indoor unitsis more than the number set.)Error of outdoor unit address settingThe number of connected main and sub outdoor units do notcorrespond to the number set at main outdoor unit PCB.Error of sub outdoor unit in receiving serial communicationsignal from main outdoor unitOutdoor unit serial communications failure.Error of main indoor unit in receiving serial communication signalfrom sub indoor unitsDuplication of main indoor unit address setting in group controlDuplication of outdoor R.C. address settingGroup control wiring is connected to individual control indoor unit.Indoor unit address is not set.Capacity code of indoor unit is not set.There are 2 or more indoor unitscontrollers which have operationmode priority in 1 refrigerant circuit.Priority set remote controllerNon-priority set remote controllerError of the outdoor unit in receiving serial communication signalfrom the indoor unitNo indoor unit is connected during auto address setting.Main outdoor unit is detecting error signal from sub outdoor unit.SerialcommunicationerrorsMissettingProtective device in indoorunit is activated.<><><><>Thermal protector in indoor unit fan motor is activated.Improper wiring connections of ceiling panelFloat switch is activated.Operation of protective function of fan inverterActivation ofprotectivedeviceContinuedThis alarm message shows when the indoor unit for multiple-use isnot connected to the outdoor unit.Capacity code of outdoor unit is not set.L02L10L184-way valve operation failureON:OperationStandbyfor heatingBlinking: OFF:Possible cause of malfunctionWirelessremote controllerreceiver displayWiredremotecontroldisplayTimerE20Operating lampblinkingOperating lampblinkingHeating readylamp blinkingHeating readylamp blinkingOperating andheating readylamps blinkingsimultaneouslyOperating andheating readylamps blinkingsimultaneouslyTimer and heatready lampblinkingaltematelyP14Operation of O 2 sensor