Daikin LX10F11B3 Service Manual

Contents

Daikin LX10F11B3 Service Manual Manual pdf 74 page image

2.7 General DiagnosisIf the unit does not work properly, refer to the following table for diagnosis to repair procedure and repairaction need.Symptom Cause Checkpoint RemedyUnit does not operate A. Compressor,Evaporator fan,Condenser fandose not run.Faulty powersupplyVoltage on primary side of circuit breakerIt should be within the voltage rangeshown in paragraph 1-1.Check the power supplyCheck the power supply plugCheck for disconnection of cableDevice malfunction Mega test check on secondary sideof magnetic contactor (Evaporator fanmotor, condenser fan motor, compressor)Replace faulty device.Controller Unit switch ON/OFF check Turn the switch ON.Alarm presence (F code) See the instructions foralarm code of controllerin paragraph 2.5.Secondary sideof power supplytransformerCheck for disconnection of F2U (fuse)Check for malfunction in componentsshown in paragraph 1.2.Replace Fuse.Replace faulty device.Check for disconnection on secondaryside of transformer (Tr)Check if there is AC24V between No.3and 4 pins of connector X30A (I/O board).Replace the transformer.B. Evaporator fanruns, but condenserfan and compressordo not run.Normal operation(Cooling OFFstatus)Display of controller (ALARM display) See the alarm codewhen ALARM isgeneratedC. Evaporatorfan andcompressorrun, butcondenser fandoes not run.Normal operationneeded>Check of operation of HPT (E101)by controller displayCheck if the condenser fan hasstopped during high-pressure control.(Check that the condenser fanoperates at low speed at over 800kPaand at high speed at over 1000kPa.)Refer to paragraph 2.6.Depend on alarmdiagnosis 001Normal if it operates atlow speed at over 800kPa and at high speedat over 1000 kPa.External factor Visual check debris and damage(including relevant parts such ascontrollers)repair as neededD. Condenserfan andcompressorrun, butevaporator fandoes not run.Faulty electrical systemof evaporator fanCTP activationMotor burnt out(disconnection)Disconnected coil ofmagnetic contactorMotor coil resistanceEnsure that the magnetic contactoris turned ONVoltage on secondary side ofmagnetic contactor (three-phase)Replace the fan motorReplace the magneticcontactorExternal factor Visual check debris and damage(including relevant parts such ascontrollers)repair as neededE. Compressor runs,but evaporator fanand condenserfan do not run.Normal operationneeded>Does "DEFROST" display on theLCD panel?Is the Defrost LED (orange)illuminated?2-45https://daikin-p.ru