Fujitsu Troubleshooting Water Leaking in Air Conditioners

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Trouble shooting 23

Abnormal Noise

Forecast of Cause :

1.Abnormal installation (Indoor/ Outdoor)

2.Fan failure (Indoor/ Outdoor)

3.Compressor failure (Outdoor)

Diagnosis method when abnormal noise is occurred

Abnormal noise is coming from Indoor unit. (Check and correct followings)

Is Main unit installed in stable condition? Is the installation of air suction grille and front panel normal?

OK

Is Fan broken or deformed?

Is the screw of Fan loose?

Is there any object which obstruct the Fan rotation?

Abnormal noise is coming from Outdoor unit. (Check and correct followings)

Is Main unit installed in stable condition? Is Fan guard installed normally?

OK

Is Fan broken or deformed?

Is the screw of Fan loose?

Is there any object which obstruct the Fan rotation?

OK

Check if vibration noise by loose bolt or contact noise of piping is happening.

OK

Is Compressor locked?

>> Check Compressor (PARTS INFORMATION 1,2)

Trouble shooting 24

Water Leaking

Forecast of Cause:

1. Erroneous installation 2. Drain hose failure

Diagnosis method when water leak occurs

Diagnosis method when water is spitting out.

Is Main unit installed in stable condition?

Is Main unit broken or deformed at the time of transportation or maintenance?

OK

Is Drain hose connection loose?

Is there a trap in Drain hose?

Is Drain hose clogged?

OK

Is Fan rotating?

Is the filter clogged?

OK

Check Gas pressure and correct it if there was a gas leak.

MPa MPa

02-25

Image 48

Contents Service Instruction Contents Appending Data Page Wall Mounted type Cooling Operation Heating Operation DRY OperationAuto Changeover Operation 01-03Indoor FAN Control Fan speedFAN Operation Cooling OperationCool AIR Prevention Control Heating mode Moisture Return Prevention Control Cooling mode& Dry modeHeating Operation Outdoor FAN Control Outdoor Fan MotorAdjust the RIGHT-LEFT Louvers Louver ControlVertical Louver Control Function RangeLimitation of Compressor Frequency by Outdoor Temperature Compressor ControlOpeartion Frequency Range Opeartion Frequency Control AT Normal Start UPTimer Opeartion Control Program TimerSleep Timer Cooling operation modeHeating operation mode Prevent to Restart for 3 Minutes 3 Minutes ST FOUR-WAY Valve Extension SelectAuto Restart 24C 75FPowerful Operation Forced Cooling Operation Test OperationCompressor Preheating Economy OperationDefrost Operation Control Condition of Starting the Defrost OperationCondition of the Defrost Operation Completion Release ConditionDefrost Flow Chart Normal defrost Integrating defrost01-14 OFF Defrost Opeartion Control Defrost end 01-15Discharge GAS Temperature Overrise Prevension Control Various ProtectionsCurrent Release Control 01-16Antifreezing Control Cooling and Dry mode High Temperature Release Control Heating ModeCooling Pressure Overrise Protection Trouble Shooting Troubleshooting Error DisplayTrouble Shooting with Error Code Check Point 4 Check Serial Signal Reverse Transfer SignalOutdoor unit Main PCB Indoor unit Controller PCB Indoor unit Fan motor Indoor unit Controller PCB Check Point Check Indoor unit electric componentsCheck Point Check external cause such as noise Check Point 3 Replace Controller PCBIndoor unit Controller PCB Indicator PCB Manual auto switch Check Point 2 Replace Controller PCBIndoor unit Controller PCB Room temperature thermistor Indoor unit Controller PCB Heat Ex. temperature thermistor Check Point 2 Check ambient temp. around motor Check Point 3 Check Indoor unit fan motorCheck Point 2 Replace Main PCB Check Point 1-2 Check external causeCheck Point 2 Check connection of Connector Check Point 3 Replace Main PCB02-11 Outdoor unit Main PCB Discharge pipe temperature thermistor CN71 CN70Outdoor unit Main PCB Heat exchanger temperature thermistor Resistance Value k 606 759 213 8531Outdoor unit Main PCB Outdoor temperature thermistor Check Point 4 Replace Main PCB Outdoor unit Main PCB Compressor Check Point 2 Check Heat exchangerCheck Point 3 Check Compressor Check Point 3 Replace Main PCB Outdoor unit Main PCB Outdoor unit Fan motor Check Point 3 Check Outdoor unit fan motorCheck Point 4 Check Output Voltage of Main PCB Check Point 2 Check each thermistor Check Point 3 Check the solenoid coil and 4-way valveForecast of Cause Trouble Shooting with no Error Code Indoor Unit No PowerCheck Point 3 Check Electrical Components Outdoor Unit No Power 02-23 Check Point Check Indoor/ Outdoor installation condition No Cooling / No HeatingCheck Point 2 Check Outdoor unit operation Check Point 3 Check Site conditionAbnormal Noise Water LeakingService Parts Information CompressorReplace Compressor Inverter Compressor Outdoor unit Electronic Expansion Valve EEV Blue RedCheck Point 5 Check Opening and Closing Operation of Valve Indoor unit fan motor Outdoor unit fan motorPage Appending Data Function Setting Setting the Filter SignCooling Room Temperature Correction Heating Room Temperature CorrectionSetting the Auto Restart Remote controller signal codeYes Procedures to change the Function Setting for wireless RC Selecting the Function Number and Setting Value Remote Controller Signal Code Setting Room temperature thermistor Discharge thermistorPage 1116,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan