Daikin 2MKS40FV1B Service Manual Download Page 1

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SiEN12-710A

Service

Manual

Inverter Multi

F-Series

[Applied Models]

Inverter Multi: Cooling only

Inverter Multi: Heat Pump

Summary of Contents for 2MKS40FV1B

Page 1: ...SiEN12 710A Service Manual Inverter Multi F Series Applied Models Inverter Multi Cooling only Inverter Multi Heat Pump ...

Page 2: ...ulti F Series Cooling Only Outdoor Unit Indoor Unit 2MKS40FV1B FTKS25DVM FDKS25CAVMB FTKS35DVM FDKS35CAVMB FDKS25EAVMB FDKS35EAVMB Heat Pump Outdoor Unit Indoor Unit 2MXS50FV1B FTXS25EVMA FDXS25CVMA FTXS35EVMA FDXS35CVMA CDXS25EAVMA CDXS35EAVMA ...

Page 3: ...r Airflow Dual Flaps Wide Angle Louvers and Auto Swing 26 1 3 Fan Speed Control for Indoor Units 27 1 4 Programme Dry Function 28 1 5 Automatic Operation 29 1 6 Thermostat Control 30 1 7 Night Set Mode 31 1 8 ECONO Mode 32 1 9 INTELLIGENT EYE 33 1 10 HOME LEAVE Operation 35 1 11 Inverter POWERFUL Operation 36 1 12 Other Functions 37 1 13 Function of Thermistor 39 2 Control Specification 42 2 1 Mod...

Page 4: ...iagnosis 101 1 Caution for Diagnosis 102 2 Problem Symptoms and Measures 104 3 Service Check Function 105 3 1 Check Method 1 105 3 2 Check Method 2 106 4 Troubleshooting 108 4 1 Error Codes and Description 108 4 2 Indoor Unit PCB Abnormality 109 4 3 Freeze up Protection Control or High Pressure Control 110 4 4 Fan Motor or Related Abnormality 112 4 5 Thermistor or Related Abnormality Indoor Unit 1...

Page 5: ...f the Panels and Plates 156 1 2 Removal of the Electrical Box 158 1 3 Removal of the PCB 163 1 4 Removal of the Sound Blanket 168 1 5 Removal of the Propeller Fan Fan Motor 170 1 6 Removal of the Thermistors 173 1 7 Removal of the Compressor 175 1 8 Removal of the Four Way Valve Electronic Expansion Valve 177 Part 8 Others 179 1 Others 180 1 1 Test Run from the Remote Control 180 1 2 Jumper Settin...

Page 6: ...wer cable plug from the plug socket before disassembling the equipment for repair Working on the equipment that is connected to the power supply may cause an electrical shook If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits do not touch any electrically charged sections of the equipment If the refrigerant gas is discharged during the repair work ...

Page 7: ...ctrical shock Do not clean the air conditioner by splashing water Washing the unit with water may cause an electrical shock Be sure to provide the grounding when repairing the equipment in a humid or wet place to avoid electrical shocks Be sure to turn off the power switch and unplug the power cable when cleaning the equipment The internal fan rotates at a high speed and cause injury Be sure to co...

Page 8: ... heat generation or fire When wiring between the indoor and outdoor units make sure that the terminal cover does not lift off or dismount because of the cable If the cover is not mounted properly the terminal connection section may cause an electrical shock excessive heat generation or fire Do not damage or modify the power cable Damaged or modified power cable may cause an electrical shock or fir...

Page 9: ...vent children from swallowing it If a child swallows the coin battery see a doctor immediately Warning Caution Installation of a leakage breaker is necessary in some cases depending on the conditions of the installation site to prevent electrical shocks Do not install the equipment in a place where there is a possibility of combustible gas leaks If the combustible gas leaks and remains around the ...

Page 10: ...re to install the packing and seal on the installation frame properly If the packing and seal are not installed properly water may enter the room and wet the furniture and floor For unitary type only Caution Icon Type of Information Description Note Note A note provides information that is not indispensable but may nevertheless be valuable to the reader such as tips and tricks Caution Caution A ca...

Page 11: ...Introduction SiEN12 710A x ...

Page 12: ...SiEN12 710A List of Functions 1 Part 1 List of Functions 1 Cooling Only 2 2 Heat Pump 4 ...

Page 13: ...Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check Comfort Airflow Mode Anticorrosion Treatment of Outdoor Heat Exchanger 3 Step Airflow H P Only Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Quiet Operation Night Quiet Mode Automatic Flexible Voltage Correspondence Outdoor Unit Quiet Operation Manual H...

Page 14: ...ilure Comfort Airflow Mode Self Diagnosis Digital LED Display H 3 Step Airflow H P Only Wiring Error Check Comfort Control Auto Fan Speed Anticorrosion Treatment of Outdoor Heat Exchanger Indoor Unit Quiet Operation Night Quiet Mode Automatic Flexibility Multi Split Split Type Compatible Indoor Unit Outdoor Unit Quiet Operation Manual INTELLIGENT EYE Flexible Voltage Correspondence Quick Warming F...

Page 15: ...o Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check Comfort Airflow Mode Anticorrosion Treatment of Outdoor Heat Exchanger 3 Step Airflow H P Only Comfort Control Auto Fan Speed Flexibility Multi Split Split Type Compatible Indoor Unit Indoor Unit Quiet Operation Night Quiet Mode Automatic Flexible Voltage Correspondence Outdoor Unit Quiet Operation Manual High...

Page 16: ... Failure Comfort Airflow Mode Self Diagnosis Digital LED Display H 3 Step Airflow H P Only Wiring Error Check Comfort Control Auto Fan Speed Anticorrosion Treatment of Outdoor Heat Exchanger Indoor Unit Quiet Operation Night Quiet Mode Automatic Flexibility Multi Split Split Type Compatible Indoor Unit Outdoor Unit Quiet Operation Manual INTELLIGENT EYE Flexible Voltage Correspondence Quick Warmin...

Page 17: ...Heat Pump SiEN12 710A 6 List of Functions ...

Page 18: ...SiEN12 710A Specifications 7 Part 2 Specifications 1 Cooling Only 8 1 1 Indoor Units 8 1 2 Outdoor Units 10 2 Heat Pump 11 2 1 Indoor Units 11 2 2 Outdoor Units 13 ...

Page 19: ... mm 265 855 340 265 855 340 Weight kg 9 9 Gross Weight kg 12 12 Operation Sound H L SL dBA 37 25 22 39 26 23 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ 9 5 Drain mm φ18 0 φ18 0 Drawing No 3D049321 3D049322 Model FDKS25CAVMB FDKS35CAVMB Rated Capacity 2 5kW Class 3 5kW Class Front Panel Color Air Flow Rates m min cfm H ...

Page 20: ... Speed Steps 5 Steps Quiet Auto 5 Steps Quiet Auto Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 48 0 48 Power Consumption Rated W 71 71 Power Factor 64 3 64 3 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 200 700 620 200 700 620 Packaged Dimensions H W D mm 274 906 751 274 906 751 Weight kg 21 21 Gross We...

Page 21: ...mension H W D mm 550 765 285 Packaged Dimension H W D mm 612 906 362 Weight kg 38 Gross Weight kg 43 Operation Sound Sound pressure dBA 47 Quiet Mode dBA 43 Sound Power dBA 62 Piping Connection Liquid mm φ 6 4 2 Gas mm φ 9 5 2 Drain mm φ18 Heat Insulation Both Liquid Gas Pipes No of Wiring Connection 3 for Power Supply 4 for Interunit Wiring Max Piping Length m 30 for Total of Each Room 20 for One...

Page 22: ... 265 855 340 Weight kg 9 9 Gross Weight kg 12 12 Operation Sound H M L SL dBA 37 31 25 22 37 33 28 25 38 32 26 23 38 34 29 26 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid mm φ 6 4 φ 6 4 Gas mm φ 9 5 φ 9 5 Drain mm φ18 0 φ18 0 Drawing No 3D054406A 3D054407A Model FDXS25CVMA FDXS35CVMA Cooling Heating Cooling Heating Rated Capacity 2 5kW Class 3 5kW Cl...

Page 23: ...t W 62 62 Speed Steps 5 Steps Quiet Auto 5 Steps Quiet Auto Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 47 0 48 0 49 0 47 0 48 0 49 0 47 0 48 0 49 0 47 0 48 0 49 Power Consumption Rated W 70 71 72 70 71 72 70 71 72 70 71 72 Power Factor 67 7 64 3 61 2 67 7 64 3 61 2 67 7 64 3 61 2 67 7 64 3 61 2 Temperature Control Microcomputer Control Micr...

Page 24: ...65 285 Packaged Dimensions H W D mm 612 906 364 Weight kg 42 Gross Weight kg 47 Operation Sound Sound Pressure dBA 48 50 Quiet Mode dBA 44 46 Sound Power dBA 63 Piping Connection Liquid mm φ 6 4 2 Gas mm φ 9 5 1 φ12 7 1 Drain mm φ18 0 Heat Insulation Both Liquid and Gas Pipes No of Wiring Connection 3 for Power Supply 4 for Interunit Wiring Max Interunit Piping Length m 30 for Total of Each Room m...

Page 25: ...Heat Pump SiEN12 710A 14 Specifications ...

Page 26: ... Circuit Board Connector Wiring Diagram 15 Part 3 Printed Circuit Board Connector Wiring Diagram 1 Printed Circuit Board Connector Wiring Diagram 16 1 1 Wall Mounted Type 16 1 2 Duct Connected Type 18 1 3 Outdoor Unit 20 ...

Page 27: ...4 S26 Connector for display PCB 5 S28 Connector for signal receiver PCB 6 S32 Connector for heat exchanger thermistor 7 S35 Connector for INTELLIGENT EYE sensor PCB 1 S29 Connector for control PCB 1 S27 Connector for control PCB 1 S36 Connector for control PCB 1 V1 Varistor 2 JA Address setting jumper JB Fan speed setting when compressor is OFF on thermostat JC Power failure recovery function auto...

Page 28: ...t Board Connector Wiring Diagram 17 PCB Detail PCB 1 Control PCB indoor unit PCB 4 INTELLIGENT EYE sensor PCB V1 S1 FU1 S6 L2 S26 S28 S32 JC JB JA LED A S35 S21 R6039 12V 5V GND PCB 2 Signal Receiver PCB PCB 3 Display PCB S29 R5234 RTH1 SW1 S27 LED3 LED2 LED1 R4290 S36 R4291 ...

Page 29: ...zed control to 5 rooms 4 S26 Connector for display PCB 5 S32 Connector for heat exchanger thermistor 1 S1 Connector for control PCB 1 V1 Varistor 2 JA Address setting jumper JB Fan speed setting when compressor is OFF on thermostat JC Power failure recovery function Refer to page 181 for more detail 3 LED A LED for service monitor green 4 FU1 Fuse 3 15A 1 SW1 S1W Forced operation ON OFF switch 2 L...

Page 30: ...Connector Wiring Diagram Printed Circuit Board Connector Wiring Diagram 19 PCB Detail PCB 1 Control PCB indoor unit PCB 2 Display PCB S1 V1 S7 S26 S32 JC JB JA S21 2P131149 LED A FU1 S1 LED3 LED2 RTH1 LED1 SW1 C1 C3 C2 WLU PbF 2P084375 ...

Page 31: ...or for terminal strip 5 S70 Connector for fan motor 6 S80 Connector for four way valve coil 7 S90 Connector for thermistor outdoor air condenser and discharge pipe 8 S91 Connector for thermistor gas pipe 9 S92 Connector for thermistor liquid pipe 1 LED A Service Monitor LED Green 2 FU1 FU2 Fuse 3 15A 250V 3 FU3 Fuse 20A 250V 4 DB1 DB2 Diode bridge 5 J3 Jumper for ECONO mode prohibition setting Ref...

Page 32: ...A Printed Circuit Board Connector Wiring Diagram Printed Circuit Board Connector Wiring Diagram 21 PCB 1 Control PCB 50 class DB2 DB1 J4 J3 S70 S45 S40 S92 S90 S91 S20 S21 S80 LED A V1 V3 V4 FU3 FU1 FU2 2P197402 ...

Page 33: ...Printed Circuit Board Connector Wiring Diagram SiEN12 710A 22 Printed Circuit Board Connector Wiring Diagram ...

Page 34: ...EAVE Operation 35 1 11 Inverter POWERFUL Operation 36 1 12 Other Functions 37 1 13 Function of Thermistor 39 2 Control Specification 42 2 1 Mode Hierarchy 42 2 2 Frequency Control 43 2 3 Controls at Mode Changing Start up 46 2 4 Discharge Pipe Temperature Control 48 2 5 Input Current Control 48 2 6 Freeze up Protection Control 49 2 7 Heating Peak cut Control 49 2 8 Fan Control 50 2 9 Liquid Compre...

Page 35: ...ns the conversion principle Drawing of Inverter The following drawing shows a schematic view of the inverter principle Phase Description 1 The supplied AC power source is converted into the DC power source for the present 2 The DC power source is reconverted into the three phase AC power source with variable frequency When the frequency increases the rotation speed of the compressor increases resu...

Page 36: ...o air condition with a small room temperature variation Energy saving heating and cooling Once the set temperature is reached the energy saving operation enables to maintain the room temperature at low power Frequency Limits The following table shows the functions that define the minimum and maximum frequency Forced Cooling Operation For more information refer to Forced operation mode on page 57 6...

Page 37: ...de Angle Louvers The louvers made of elastic synthetic resin provide a wide range of airflow that guarantees a comfortable air distribution Auto Swing In case of FTKS25 35D FTXS25 35E The following table explains the auto swing process for heating cooling dry and fan COMFORT AIRFLOW Mode FTKS25 35D FTXS25 35E The vertical swing flap is controlled not to blow the air directly on the person in the r...

Page 38: ...ote 1 Fan stops during defrost operation 2 In time of thermostat OFF the fan rotates at the following speed Cooling The fan keeps rotating at the set tap Heating The fan stops Automatic Air Flow Control for Heating On heating mode the indoor fan speed will be regulated according to the indoor heat exchanger temperature and the difference between the room temperature and the required set point Auto...

Page 39: ...he room temperature at startup and the temperature set by the microcomputer is divided into two zones Then the unit operates in the dry mode with an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level Room temperature at startup Set temperature X Thermostat OFF point Y Thermostat ON point Z 24ºC or more Room temperature at startup X 2 5ºC X 0 5ºC or Y...

Page 40: ... C 2 Main unit setting temperature equals remote control setting temperature 3 Operation ON OFF point and mode switching point are as follows 1 Heating Cooling switching point Room temperature Main unit setting temperature 2 5 deg 2 Cooling Heating switching point Room temperature Main unit setting temperature 2 5 deg 3 Thermostat ON OFF point is the same as the ON OFF point of cooling or heating ...

Page 41: ... turns on in any zones except A The monitoring time has passed while the temperature difference is in the zone B Cooling Dry 10 minutes Heating 10 seconds Cooling Dry Wall Mounted Type Duct Connected Type Heating Wall Mounted Type Duct Connected Type B A OFF OFF ON ON C Room temperature setpoint R4668 Cooling 2 0 C Dry 2 5 2 0 C Cooling 0 5 C Dry 0 5 C B B A A OFF OFF ON ON C C 1 5 C Room temperat...

Page 42: ...e sleeping conditions and also conserves electricity Cooling Operation In case of FTKS25 35D FTXS25 35E the temperature rises once Heating Operation Operation stops at the set hours Timer operation Night Set Circuit ON 0 5 C temperature shift 0 5 C temperature shift Temperature setting remains the same When outside temperature is normal and room temperature is at set temperature When outside tempe...

Page 43: ...s remote control by pushing the ECONO button When this function is ON the maximum capacity is also down Approx 20 This function can only be set when the unit is running Pressing the operation stop button causes the settings to be canceled This function and POWERFUL operation cannot be used at the same time The latest command has the priority Details ECONO mode can be activated while the unit is ru...

Page 44: ...omputer doesn t have a signal from the sensor in 20 minutes it judges that nobody is in the room and operating the unit in temperature shifted 2 C from the set temperature Cooling Dry 2 C higher Heating 2 C lower and Auto according to the operation mode at that time H1 In case of Fan mode the fan speed reduces by 50 rpm 1sec sampling 20msec High Low ON OFF R2821 If the sensor detects the outputs 1...

Page 45: ...nutes so as to prevent this phenomena After this 40 minutes the prohibition of the thermostat off is cancelled and it can realize the conditions to conduct thermostat off depending on the room temperature In or after this 40 minutes if the sensor detects human motion detection signal it let the set temperature and the fan speed return to the original set point keeping a normal operation Others The...

Page 46: ...on becomes effective The HOME LEAVE button is ineffective in dry mode and fan mode 2 Details of Function A mark representing HOME LEAVE is indicated on the liquid crystal display of the remote control The indoor unit is operated according to the set temperature and air volume for HOME LEAVE which were pre set in the memory of the remote control The LED Red of indoor unit representing HOME LEAVE li...

Page 47: ... POWERFUL operation in cooling mode Refer to Fan Speed control on page 27 for detail Operation mode Fan speed Target set temperature COOL H tap 50 rpm 18 C DRY Dry rotating speed 50 rpm Normally targeted temperature in dry operation Approx 2 C HEAT H tap 50 rpm 30 C FAN H tap 50 rpm AUTO Same as cooling heating in POWERFUL operation The target is kept unchanged R7118 Target temp Fan 50rpm Set temp...

Page 48: ...emote control is missing The operation mode refers to the following table In the case of multi system operation there are times when the unit does not activate with this button Forced operation mode Forced operation mode will be set by pressing the ON OFF button for between 5 to 9 sec while the unit is not operating Note When the ON OFF button is pressed for 10 sec or more the operation will be st...

Page 49: ...ormality occur the LCD remote control displays error code These indications allow prompt maintenance operations 1 12 7 Auto restart Function Even if a power failure including one for just a moment occurs during the operation the operation restarts in the condition before power failure automatically when power is restored Note It takes 3 minutes to restart the operation because the 3 minute standby...

Page 50: ...at exchanger temperature the discharge pipe thermistor is judged as disconnected 3 The outdoor heat exchanger thermistor is used for high pressure protection during cooling operation B Discharge Pipe Thermistor 1 The discharge pipe thermistor is used for controlling temperature of the discharge pipe If the temperature of discharge pipe used in place of the inner temperature of the compressor rises...

Page 51: ...ng disconnection of the discharge pipe thermistor When the discharge pipe temperature become lower than an indoor heat exchanger temperature a disconnected discharge pipe thermistor can be detected The indoor heat exchanger thermistors are also used for preventing abnormal high pressure 5 When only one indoor unit is operating the indoor heat exchanger thermistor is used for sub cooling control Th...

Page 52: ...equency drops or the operation halts 2 The discharge pipe thermistor is used for detecting disconnection of the discharge thermistor C Gas Pipe Thermistor 1 In cooling the gas pipe thermistors are used for gas pipe isothermal control The system controls electronic expansion valve opening so that gas pipe temperature in each room becomes equal D Indoor Heat Exchanger Thermistor 1 The indoor heat ex...

Page 53: ... conflict with each other The system will follow the mode determined first First push first set For the rooms set with different mode select stand by mode Operation lamp flashes Air conditioner control mode Forced operating mode Forced cooling for Pump Down Operation Normal operating mode Cooling Heating Defrosting Stop mode except for cooling heating modes by indoor command Preheat operation Duri...

Page 54: ...thermistor temperature 1 2 Limiting defrost control time 1 3 Forced cooling 1 4 Indoor frequency command 2 Determine upper limit frequency Set a minimum value as an upper limit frequency among the frequency upper limits of the following functions Compressor protection input current discharge pipes Low Hz high pressure peak cutting freeze prevention defrost 3 Determine lower limit frequency Set a m...

Page 55: ...ndoor Unit Capacity S value The capacity of the indoor unit is a S value and is used for frequency command Frequency Initial Setting Outline When starting the compressor or when conditions are varied due to the change of the operating room the frequency must be initialized according to the total of a maximum ΔD value of each room and a total value of Q ΣQ of the operating room the room in which th...

Page 56: ...oping Frequency management is carried out only when the frequency droops For limiting lower limit Frequency management is carried out only when the frequency rises 5 Upper and lower limit of frequency by PI control The frequency upper and lower limits are set depending on the total of S values of operating room When low noise commands come from the indoor unit more than one room or when outdoor un...

Page 57: ...s stopped the delay switch of the four way valve must be carried out after the operation stopped Detail The OFF delay of four way valve Energize the coil for 150 sec after unit operation is stopped 2 3 3 Four Way Valve Operation Compensation Outline Heat Pump Only At the beginning of the operation as the four way valve is switched acquire the differential pressure required for activating the four ...

Page 58: ... the compressor from OFF to ON the upper limit of frequency must be set as follows The function must not be used when defrosting only for heat pump model 40 class 50 class FCG 3 90 85 FCG 2 72 70 FCG 1 62 55 TCG 1 140 150 TCG 2 180 180 TCG 3 300 300 Frequency FCG3 FCG2 FCG1 TCG1sec TCG2sec TCG3sec Time R2949 ...

Page 59: ...requency will be 2 Hz drooping Repeating the above drooping continues until the current rushes on the drooping zone without change In the keep zone the frequency limit will remain In the return reset zone the frequency limit will be cancelled Limitation of current drooping and stop value according to the outdoor air temperature 1 In case the operation mode is cooling The current droops when outdoo...

Page 60: ...ump Only During heating operation the signals being sent from the indoor unit allow the operating frequency limitation and prevent abnormal high pressure The signal from the indoor unit must be divided as follows Detail Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 min from operation start and sec from changing number of operation r...

Page 61: ...utdoor air temperature is 18 37 C the fan tap must be set to M When the outdoor air temperature is lower than 18 C the fan tap must be set to L 2 When Heating Operation Only for heat pump model When the outdoor air temperature is lower than 4 C the fan tap must be set to H When the outdoor air temperature is 4 12 C the fan tap must be set to M When the outdoor air temperature is higher than 12 C t...

Page 62: ...eating operation 6 minutes after the compressor is started and more than 30 minutes of accumulated fine pass since the start of the operation or ending the defrosting Conditions for Canceling Defrost The judgment must be made with heat exchanger temperature 40 class 4 C 12 C 50 class 4 C 15 C Frequency Compressor Four way valve Fan ON OFF ON OFF ON OFF 0Hz 5sec 450pls 350pls 450pls Initial opening...

Page 63: ...y for Heat Pump Model Open Control 1 Electronic expansion valve control when starting operation 2 Control when frequency changed 3 Control for defrosting only for heat pump model 4 Oil recover control 5 Control when a discharge pipe temperature is abnormally high 6 Control when the discharge pipe thermistor is disconnected 7 Control for indoor unit freeze up protection Feedback Control 1 Discharge...

Page 64: ...re Defrost control FD 1 Pressure equalizing control Open control when starting Continue Pressure equalizing control Gas pipe isothermal control SC control only for heat pump model Control when frequency changed Control for abnormally high discharge pipe temperature Dew buildup prevention control for indoor rotor Oil recovery control Indoor freeze prevention control Liquid pipe temperature control ...

Page 65: ...d heat exchanger of the rooms and compensate the electronic expansion valve opening so that the SC of each room becomes the target SC When the actual SC is target SC open the electronic expansion valve of the room When the actual SC is target SC close the electronic expansion valve of the room Detail Start Functioning Conditions After finishing the open control 810 seconds after the beginning of t...

Page 66: ... the Discharge Pipe When the compressor is operating if the discharge pipe temperature exceeds a certain value open the electronic expansion valve and remove the refrigerant to the low pressure side and lower discharge temperature 2 11 10 Oil Recovery Function Outline The electronic expansion valve opening in the cooling stopped room must be set as to open for a certain time at a specified interva...

Page 67: ... interrupted too 2 12 3 Insufficient Gas Control Outline If a power consumption is below the specified value in which the frequency is higher than the specified frequency it must be regarded as gas insufficient In addition to such conventional function if the discharge temperature is higher than the target discharge pipe temperature and the electronic expansion valve is fully open 450 pulses more ...

Page 68: ...ine Forced operating mode includes only forced cooling Detail Forced Cooling Item Forced Cooling Forced operation allowing conditions 1 The indoor unit is not abnormal but the indoor unit which is not in the freezing prohibiting zone is present in more than 1 room 2 The outdoor unit is not abnormal and not in the 3 minute stand by mode The forced operation is allowed when the above and conditions ...

Page 69: ... and Control 2 14 Additional Function 2 14 1 POWERFUL Operation Mode Compressor operating frequency and outdoor unit airflow rate are increased 2 14 2 Voltage Detection Function Power supply voltage is detected each time equipment operation starts ...

Page 70: ...of Parts 64 2 4 Preparation Before Operation 70 2 5 AUTO DRY COOL HEAT FAN Operation 73 2 6 Adjusting the Air Flow Direction 75 2 7 POWERFUL Operation 77 2 8 OUTDOOR UNIT QUIET Operation 78 2 9 ECONO Operation 79 2 10 HOME LEAVE Operation 80 2 11 MOLD PROOF Operation 82 2 12 INTELLIGENT EYE Operation 83 2 13 TIMER Operation 85 2 14 Note for Multi System 87 2 15 Care and Cleaning 89 2 16 Troublesho...

Page 71: ...to know a clever method of using it In order to meet this expectation of the users giving sufficient explanations taking enough time can be said to reduce about 80 of the requests for servicing However good the installation work is and however good the functions are the customer may blame either the room air conditioner or its installation work because of improper handling The installation work an...

Page 72: ...IMER Operation H 85 85 Note for Multi System 87 87 Care Care and Cleaning 89 89 Trouble Shooting Trouble Shooting 96 96 Drawing No 3P194550 4C 3P194539 3 Model Series Duct Connected Type FDKS25 35C FDKS25 35E FDXS25 35C CDXS25 35E Read Before Operation Safety Precautions 62 62 62 Names of Parts 67 67 67 Preparation Before Operation H 70 70 70 Operation AUTO DRY COOL HEAT FAN Operation H 73 73 73 A...

Page 73: ... yourself Incorrect work will cause electric shocks fire etc For repairs and reinstallation consult your Daikin dealer for advice and information The refrigerant used in the air conditioner is safe Although leaks should not occur if for some reason any refrigerant happens to leak into the room make sure it does not come in contact with any flame as of gas heaters kerosene heaters or gas range If t...

Page 74: ...it to avoid injury do not remove the fan guard Do not place anything under the indoor or outdoor unit that must be kept away from moisture In certain conditions moisture in the air may condense and drip After a long use check the unit stand and fittings for damage Do not touch the air inlet and aluminum fins of outdoor unit It may cause injury The appliance is not intended for use by young childre...

Page 75: ...Instruction SiEN12 710A 64 Operation Manual 2 3 Names of Parts FTKS 25 35 D FTXS 25 35 E Indoor unit ...

Page 76: ...rs are inside of the air outlet 12 Indoor Unit ON OFF switch Push this switch once to start operation Push once again to stop it The operation mode refers to the following table This switch is useful when the remote control is missing 13 Operation lamp green 14 TIMER lamp yellow 15 INTELLIGENT EYE lamp green 16 Signal receiver It receives signals from the remote control When the unit receives a si...

Page 77: ...ion 5 TEMPERATURE adjustment buttons It changes the temperature setting 6 ON OFF button Press this button once to start operation Press once again to stop it 7 MODE selector button It selects the operation mode AUTO DRY COOL HEAT FAN 8 QUIET button OUTDOOR UNIT QUIET OPERATION 9 FAN setting button It selects the air flow rate setting 10 SWING button 11 MOLD PROOF button MOLD PROOF operation 12 SEN...

Page 78: ...SiEN12 710A Instruction Operation Manual 67 FDK X S 25 35 C FDKS 25 35 E CDXS 25 35 E Indoor unit 3 6 8 9 10 7 1 4 5 2 ...

Page 79: ... Air inlet 6 Room temperature sensor It senses the air temperature around the unit 7 Operation lamp green 8 TIMER lamp yellow 9 HOME LEAVE lamp red Lights up when you use HOME LEAVE operation 10 Indoor Unit ON OFF switch Push this switch once to start operation Push once again to stop it This switch is useful when the remote control is missing The operation mode refers to the following table 11 Ai...

Page 80: ...anges the temperature setting 6 ON OFF button Press this button once to start operation Press once again to stop it 7 MODE selector button It selects the operation mode AUTO DRY COOL HEAT FAN 8 QUIET button OUTDOOR UNIT QUIET operation 9 FAN setting button It selects the air flow rate setting 10 ON TIMER button 11 OFF TIMER button 12 TIMER Setting button It changes the time setting 13 TIMER CANCEL...

Page 81: ...lace the two old batteries together When the system is not used for a long time take the batteries out We recommend replacing once a year although if the remote control display begins to fade or if reception deteriorates please replace with new alkali batteries Do not use manganese batteries The attached batteries are provided for the initial use of the system The usable period of the batteries ma...

Page 82: ...e unit 2 Fix the holder to a wall a pillar etc with the screws supplied with the holder 3 Place the remote control in the remote control holder Receiver Remote control holder To remove pull it upwards Set About remote control Never expose the remote control to direct sunlight Dust on the signal transmitter or receiver will reduce the sensitivity Wipe off dust with soft cloth Signal communication m...

Page 83: ...ditioner always consumes 15 35 watts of electricity even while it is not operating If you are not going to use the air conditioner for a long period for example in spring or autumn turn the breaker OFF Use the air conditioner in the following conditions Operation outside this humidity or temperature range may cause a safety device to disable the system Recommended temperature setting For cooling 2...

Page 84: ...vances the mode setting in sequence AUTO DRY COOL HEAT FAN FTK FTX 2 Press ON OFF button The OPERATION lamp lights up To stop operation 3 Press ON OFF button again Then OPERATION lamp goes off To change the temperature setting 4 Press TEMPERATURE adjustment button TEMP ON OFF POWERFUL MODE FAN SWING SENSOR ECONO MOLDPROOF TIMER ON CANCEL OFF QUIET 2 3 1 4 5 DRY or FAN mode AUTO or COOL or HEAT mod...

Page 85: ...re the room gets warmer In heating operation frost may occur on the outdoor unit and lower the heating capacity In that case the system switches into defrosting operation to take away the frost During defrosting operation hot air does not flow out of indoor unit Note on COOL operation This air conditioner cools the room by blowing the hot air in the room outside so if the outside temperature is hi...

Page 86: ...ase your comfort To adjust the horizontal blades flaps 1 Press SWING button is displayed on the LCD and the flaps will begin to swing 2 When the flaps have reached the desired position press SWING button once more The display will stop moving disappears from the LCD TEMP ON OFF POWERFUL MODE FAN SWING SENSOR ECONO MOLDPROOF TIMER ON CANCEL OFF QUIET 1 2 ...

Page 87: ... operation mode See the figure If the unit is operated after being stopped with the flaps pointed down in cooling or dry operation the flaps will automatically move to a hor izontal position after about one hour to prevent condensation from forming on them ATTENTION Always use a remote control to adjust the flaps angle If you attempt to move it forcibly with hand when it is swinging the mechanism ...

Page 88: ...ion cannot be used together with ECONO or QUIET Operation Priority is given to the function of whichever button is pressed last POWERFUL Operation can only be set when the unit is running Pressing the operation stop button causes the settings to be canceled and the disappears from the LCD In COOL and HEAT mode To maximize the cooling heating effect the capacity of outdoor unit must be increased an...

Page 89: ...T operation 2 Press QUIET button again disappears from the LCD Note on OUTDOOR UNIT QUIET operation If using a multi system this function will work only when the OUTDOOR UNIT QUIET operation is set on all operated indoor units This function is available in COOL HEAT and AUTO modes This is not available in FAN and DRY mode POWERFUL operation and OUTDOOR UNIT QUIET operation cannot be used at the sa...

Page 90: ... button causes the settings to be canceled and the disappears from the LCD ECONO operation is a function which enables efficient operation by limiting the power consumption of the outdoor unit operating frequency ECONO operation functions in AUTO COOL DRY and HEAT modes POWERFUL operation and ECONO operation cannot be used at the same time Priority is given to the function of whichever button is p...

Page 91: ...w rate for HOME LEAVE operation When using HOME LEAVE operation for the first time please set the temperature and air flow rate for HOME LEAVE operation Record your preferred temperature and air flow rate 1 Press HOME LEAVE button Make sure is displayed in the remote control display 2 Adjust the set temperature with or as you like 3 Adjust the air flow rate with FAN setting button as you like Home...

Page 92: ... will be welcomed by a comfortably air conditioned room Push the HOME LEAVE Operation button again and the air conditioner will adjust capacity to the set temperature for normal operation Set the unit to HOME LEAVE Operation before leaving the living room when going to bed The unit will maintain the temperature in the room at a comfortable level while you sleep When you enter the living room in th...

Page 93: ...nds is displayed on the LCD To cancel MOLD PROOF operation 2 Press and hold the MOLD PROOF button for two seconds one more time disappears from the LCD MOLD PROOF operation will operate for approximately one hour after dry or cooling mode is turned off This function is not designed to remove existing dust or mold MOLD PROOF operation is not available when the unit is turned off using the OFF TIMER...

Page 94: ...ress SENSOR button is displayed on the LCD To cancel the INTELLIGENT EYE operation 2 Press SENSOR button again disappears from the LCD TEMP ON OFF POWERFUL MODE FAN SWING SENSOR ECONO MOLDPROOF TIMER ON CANCEL OFF QUIET 1 2 EX When somebody in the room When nobody in the room Somebody back in the room Normal operation 20 min after start energy saving operation Back to normal operation ...

Page 95: ...ndoor unit location the speed of passersby temperature range etc The sensor also mistakenly detects pets sunlight fluttering curtains and light reflected off of mirrors as passersby INTELLIGENT EYE operation will not go on during powerful operation Night set mode will not go on during you use INTELLIGENT EYE operation Vertical angle 90 Side View Horizontal angle 110 Top View Do not place large obj...

Page 96: ...ges the setting rapidly 3 Press OFF TIMER button again The TIMER lamp lights up To cancel the OFF TIMER operation 4 Press CANCEL button The TIMER lamp goes off TEMP ON OFF POWERFUL MODE FAN SWING SENSOR ECONO MOLDPROOF TIMER ON CANCEL OFF QUIET 4 2 1 3 When TIMER is set the present time is not displayed Once you set ON OFF TIMER the time setting is kept in the memory The memory is canceled when re...

Page 97: ... changes the setting rapidly 3 Press ON TIMER button again The TIMER lamp lights up To cancel the ON TIMER operation 4 Press CANCEL button The TIMER lamp goes off To combine ON TIMER and OFF TIMER A sample setting for combining the two timers is shown below TEMP ON OFF POWERFUL MODE FAN SWING SENSOR ECONO MOLDPROOF TIMER ON CANCEL OFF QUIET 2 1 3 4 Example Present time 11 00 p m The unit operating...

Page 98: ...IGHT QUIET Mode requires initial programming during installation Please consult your retailer or dealer for assistance NIGHT QUIET Mode reduces the operation noise of the outdoor unit during the night time hours to prevent annoyance to neighbors The NIGHT QUIET Mode is activated when the temperature drops 5 C or more below the highest temperature recorded that day Therefore when the temperature di...

Page 99: ...nd D are all operating If the unit in Room A enters POWERFUL operation operation capacity will be concentrated in Room A In such a case the cooling heating efficiency of the units in Rooms B C and D may be slightly reduced 3 Priority when using OUTDOOR UNIT QUIET operation Example Room A is the Priority Room in the examples Just by setting the unit in Room A to QUIET operation the air conditioner ...

Page 100: ... front panel with water dry it with cloth dry it up in the shade after washing 4 Attach the front panel Set the 2 keys of the front panel into the slots and push them in all the way Close the panel slowly and push the panel at the 3 points 1 on each side and 1 in the middle Fit the key into the slot Don t touch the metal parts of the indoor unit If you touch those parts this may cause an injury Wh...

Page 101: ...ith neutral detergent thinned with lukewarm water then dry them up in the shade It is recommended to clean the air filters every two weeks Titanium Apatite Photocatalytic Air Purifying Filter The Titanium Apatite Photocatalytic Air Purifying Filter can be renewed by washing it with water once every 6 months We recommend replacing it once every 3 years Maintenance 1 Remove dust with a vacuum cleane...

Page 102: ...smoothly out of the drain hose during COOL or DRY operation If no drain water is seen water may be leaking from the indoor unit Stop operation and consult the service shop if this is the case Before a long idle period 1 Operate the FAN only for several hours on a fine day to dry out the inside Press MODE selector button and select FAN operation Press ON OFF button and start operation 2 After opera...

Page 103: ...ng the air filter Remove dust from the air filter using a vacuum cleaner and gently rinse them in cool water Do not use detergent or hot water to avoid filter shrinking or deformation After cleaning dry them in the shade 3 Replacing the air filter Rear suction Hook the filter behind the flap situated at the top of the unit and push the other side gently over the 3 bends Bottom suction Hook the fil...

Page 104: ...wastes energy The suction grille is option Do not use water or air of 50 C or higher for cleaning air filters and outside panels Check that the base stand and other fittings of the outdoor unit are not decayed or corroded Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit Check that the drain comes smoothly out of the drain hose during COOL or DRY oper...

Page 105: ...ir filter Remove dust from the air filter using a vacuum cleaner and gently rinse them in cool water Do not use detergent or hot water to avoid filter shrinking or deformation After cleaning dry them in the shade 3 Replacing the air filter Rear suction Hook the filter behind the flap situated at the top of the unit and push the other side gently over the bends Bottom suction Hook the filter behind...

Page 106: ...ction grille is option Do not use water or air of 50 C or higher for cleaning air filters and outside panels Ask your DAIKIN dealer how to clean it Check that the base stand and other fittings of the outdoor unit are not decayed or corroded Check that nothing blocks the air inlets and the outlets of the indoor unit and the outdoor unit Check that the drain comes smoothly out of the drain hose duri...

Page 107: ...when the air conditioner is in defrost operation In COOL or DRY mode Moisture in the air condenses into water on the cool surface of outdoor unit piping and drips Mists come out of the indoor unit This happens when the air in the room is cooled into mist by the cold air flow during cooling operation The indoor unit gives out odour This happens when smells of the room furniture or cigarettes are ab...

Page 108: ...block the air inlet or the outlet of the indoor and the outdoor units Clean the air filters or take all obstacles away and turn the breaker OFF Then turn it ON again and try operating the air conditioner with the remote control If the lamp still flashes call the service shop where you bought the air conditioner Are operation modes all the same for indoor units connected to outdoor units in the mul...

Page 109: ...u bought the air conditioner The maintenance cost must be born by the user This product contains fluorinated greenhouse gases covered by the Kyoto Protocol Refrigerant type R410A GWP 1 value 1975 1 GWP global warming potential Periodical inspections for refrigerant leaks may be required depending on European or local legislation Please contact your local dealer for more information Call the servic...

Page 110: ...OTOR FAULT C4 FAULTY HEAT EXCHANGER TEMPERATURE SENSOR C9 FAULTY SUCTION AIR TEMPERATURE SENSOR OUTDOOR UNIT EA COOLING HEATING SWITCHING ERROR E5 OL STARTED E6 FAULTY COMPRESSOR START UP E7 DC FAN MOTOR FAULT E8 OVERCURRENT INPUT F3 HIGH TEMPERATURE DISCHARGE PIPE CONTROL F6 HIGH PRESSURE CONTROL IN COOLING H6 OPERATION HALT DUE TO FAULTY POSITION DETECTION SENSOR H8 DC CURRENT SENSOR FAULT H9 FA...

Page 111: ...Instruction SiEN12 710A 100 Operation Manual ...

Page 112: ... 9 Compressor Lock 120 4 10 DC Fan Lock 121 4 11 Input Over Current Detection 122 4 12 Discharge Pipe Temperature Control 124 4 13 High Pressure Control in Cooling 125 4 14 Compressor Sensor System Abnormality 127 4 15 Position Sensor Abnormality 128 4 16 DC Voltage DC Current Sensor Abnormality 130 4 17 Thermistor or Related Abnormality Outdoor Unit 131 4 18 Electrical Box Temperature Rise 133 4 ...

Page 113: ...ks Cause of above trouble could be Operation mode butting Check followings Are the operation modes all the same for indoor units connected to Multi system outdoor unit If not set all indoor units to the same operation mode and confirm that the operation lamp is not blinking Moreover when the operation mode is in Auto set all indoor unit operation mode to Cool or Heat and check again if the operati...

Page 114: ...en LED on the PCB The flashing green LED indicates normal equipment condition Troubleshooting with the green LED The LED A of the outdoor unit indicate microcomputer operation condition Even after the error is cancelled and the equipment operates in normal condition the LED indication remains See page 21 for detail of LED A ...

Page 115: ... heat pump model and cooling operation cannot be used when the outdoor air temperature is below 10 C Diagnosis with remote control indication 108 Equipment operates but does not cool or does not heat only for heat pump model Check for wiring and piping errors in the indoor and outdoor units connection wires and pipes Conduct the wiring piping error check described on the product diagnosis nameplat...

Page 116: ... beep and two consecutive beeps indicate non corresponding codes 2 To cancel the code display hold the timer cancel button down for 5 seconds The code display also cancels itself if the button is not pressed for 1 minute No Code No Code No Code 1 00 12 C7 23 H0 2 U4 13 H8 24 E1 3 F3 14 J3 25 P4 4 E6 15 A3 26 L3 5 L5 16 A1 27 L4 6 A6 17 C4 28 H6 7 E5 18 C5 29 H7 8 F6 19 H9 30 U2 9 C9 20 J6 31 UH 10...

Page 117: ...nk 2 Press the TEMP button Press TEMPs or TEMPt and change the digit until you hear the sound of beep or pi pi 3 Diagnose by the sound H pi The number of tens does not accord with the error code H pi pi The number of tens accords with the error code H beep The both numbers of tens and units accord with the error code See 7 4 Enter the diagnosis mode again Press the MODE button The digit of the num...

Page 118: ...both numbers of tens and units do not accord with the error code H pi pi The number of tens accords with the error code H beep The both numbers of tens and units accord with the error code 7 Determine the error code The digits indicated when you hear the beep sound are error code Error codes and description Refer to page 108 8 Exit from the diagnosis mode Press the MODE button R4277 R4278 ...

Page 119: ...Close Fault 116 C9 Room temperature thermistor abnormality 115 Outdoor Unit A5 Anti icing function 117 E5H OL activation compressor overload 119 E6H Compressor lock 120 E7 DC fan lock 121 E8 Input over current detection 122 F3 Discharge pipe temperature control 124 F6 High pressure control in cooling 125 H0 Compressor sensor system abnormality 127 H6 Position sensor abnormality 128 H8 DC voltage D...

Page 120: ...approximately 10 continuous seconds Supposed Causes Faulty indoor unit PCB Faulty connector connection Troubleshooting Note Connector Nos vary depending on models Is it normal Connector connection check note YES NO R7130 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Correct connections Replace PCBs Model Type Connector No Wall Mount...

Page 121: ...n according to the temperature detected by the indoor unit heat exchanger thermistor Malfunction Decision Conditions High pressure control During heating operations the temperature detected by the indoor heat exchanger thermistor is above 65 C Freeze up protection When the indoor unit heat exchanger temperature is below 0 C during cooling operation Supposed Causes Operation halt due to clogged air...

Page 122: ... or disconnect connector or parts damage may be occurred Provide sufficient air passage Clean the air filter Clean the heat exchanger Replace the indoor unit PCB Replace the thermistor replace the indoor unit PCB Is there any short circuit Check the intake air filter Is it very dirty Check the dust accumulation on the indoor unit heat exchanger Is it very dirty Does it conform to the thermistor ch...

Page 123: ... of the fan motor Detection error due to faulty control PCB Troubleshooting Check No 16 Refer to P 154 NO NO NO Check No 16 Check Hall IC NO NO NO YES YES YES YES YES YES R7132 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Replace the fan motor or control PCB Replace the fan motor Replace control PCB Measure the voltage between the ...

Page 124: ...Conditions When the detected rotation speed does not reach the demanded rotation speed of the target tap and is less than 50 of the maximum fan motor rotation speed Supposed Causes Operation halt due to short circuit inside the fan motor winding Operation halt due to breaking of wire inside the fan motor Operation halt due to breaking of the fan motor lead wires Operation halt due to faulty capaci...

Page 125: ...f power supply and rotate fan by hand Turn power ON and operate fan Turn off power supply and disconnect fan motor connector then turn power ON Stop fan motor Turn off power supply and disconnect fan motor connector then turn power ON again Does it rotate Check No 01 Check output of fan motor connector Check No 01 Check output of fan motor connector Check No 01 Check output of fan motor connector ...

Page 126: ...ohms or below about 50 C more than 1 860 kohms Note The values vary slightly in some models Supposed Causes Faulty connector connection Faulty thermistor Faulty PCB Troubleshooting Check No 06 Refer to P 149 C4 Heat exchanger temperature thermistor C9 Room temperature thermistor YES R7134 NO YES NO Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may ...

Page 127: ...the breaker off 2 Remove the decorative plate 3 Remove the slot in panel 4 Put the plug in or turn the breaker on Wait until the initialization finishes 5 Operate the unit by the indoor unit ON OFF switch YES YES YES YES NO NO NO NO R7135 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Restart and check the movement Does it move Does ...

Page 128: ...n Conditions In the cooling mode the following conditions A and B are kept together for 5 minutes A Indoor unit heat exchanger temperature 1 C B Indoor unit heat exchanger temperature Room temperature 10 C If the freeze up protection control is activated 4 times continuously the system will be shut down The 4 time counter will reset itself if any of the following errors does not occur for 60 minut...

Page 129: ...r unit heat exchanger thermistor Check No 06 Check the room temperature thermistor Thermistor as specified in its characteristic chart Change the gas to let moisture out of the unit after drawing a vacuum Thermistor as specified in its characteristic chart Correct the wiring or piping error Replace the defective EV or coil Replace the heat exchanger thermistor Replace the room temperature thermist...

Page 130: ...shooting Check No 04 Refer to P 146 Check No 05 Refer to P 148 Check No 06 Refer to P 149 Check No 11 Refer to P 152 R7137 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred YES NO Check No 06 Check the thermistors Check No 05 Check the four way valve Check No 04 Check the electronic expansion valve Insert the thermistor in position Repl...

Page 131: ... Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred NO YES YES NO NO YES Inverter checker Part No 1225477 Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Replace the compressor Normal Emergency stop without compressor running System shut down after errors repeated several times Turn o...

Page 132: ... for about 11 minutes normal Supposed Causes Fan motor breakdown Harness or connector disconnected between fan motor and PCB or in poor contact Foreign matters stuck in the fan Troubleshooting Check No 15 Refer to P 154 R7139 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred YES YES NO YES NO NO Turn off the power and reconnect the conn...

Page 133: ...n Decision Conditions The following input value calculated from power consumption of outdoor unit with the compressor running continues for 2 5 seconds Input value Above 15 A Supposed Causes Over current due to compressor failure Over current due to defective power transistor Over current due to defective inverter main circuit electrolytic capacitor Over current due to defective outdoor unit PCB E...

Page 134: ...or Input current flowing above its stop level Check No 14 Check the main circuit electrolytic capacitor Check No 08 Check the discharge pressure Check No 07 Check the installation condition Inverter checker Part No 1225477 An input over current may result from wrong internal wiring If the wires have been disconnected and reconnected for part replacement for example and the system is interrupted by...

Page 135: ... error does not occur during the following 60 minute compressor running time total time Supposed Causes Refrigerant shortage Four way valve malfunctioning Discharge pipe thermistor defective heat exchanger or outdoor temperature thermistor defective Outdoor unit PCB defective Water mixed in the local piping Electronic expansion valve defective Stop valve defective Troubleshooting Check No 04 Refer...

Page 136: ...ed by the heat exchanger thermistor exceeds the limit Malfunction Decision Conditions Activated when the temperature being sensed by the heat exchanger thermistor rises above 65 C Deactivated when the temperature drops below 53 C Supposed Causes The installation space is not large enough Faulty outdoor unit fan Faulty electronic expansion valve Faulty outdoor unit heat exchanger thermistor Faulty ...

Page 137: ...onnector or fan motor lead wires Replace the heat exchanger thermistor Replace PCB Replace the electronic expansion valve or coil Replace the PCB Change the air outlet grille position Clean the heat exchanger Change the installation location Abnormal Normal Normal Normal Normal Abnormal Abnormal Abnormal Check No 09 Check the outdoor fan Check No 07 Check the installation condition Judgment Judgme...

Page 138: ...e DC current before compressor startup is other than 0 5 to 4 5 V detected by converting the sensor output to voltage or the DC voltage is 50 V or less Supposed Causes Defective PCB Harness disconnection defective connection Troubleshooting Caution Replace the wire harness Replace the outdoor unit PCB R7143 Be sure to turn off power switch before connect or disconnect connector or parts damage may...

Page 139: ...e position detection circuit Malfunction Decision Conditions The compressor is not running in about 15 seconds after the compressor run command signal is sent Clearing condition Continuous run for about 11 minutes normal The system will be shut down if the error occurs 16 times Supposed Causes Compressor relay cable disconnected Compressor itself defective Outdoor unit PCB defective Stop valve clo...

Page 140: ...lace the compressor Correct the power supply or replace the outdoor unit PCB Reconnect as specified Replace the outdoor unit PCB outdoor unit fan Replace the four way valve coil Inverter checker Part No 1225477 Check No 08 Check the discharge pressure Check No 13 Check for short circuit Normal Check the electrolytic capacitor voltage Judgement Check the power supply Electricals or compressor harne...

Page 141: ... is more than 52 Hz and when the DC current is less than 0 3 A or DC voltage is less than 50V If this error repeats 4 times the system will be shut down The error counter will reset itself if this or any other error does not occur during the following 60 minute compressor running time total time Supposed Causes Power transistor defective Internal wiring broken or in poor contact Reactor defective ...

Page 142: ...put is above 4 98 V or below 0 02 V with the power on for 5 seconds Error J3 is judged if the discharge pipe thermistor temperature is smaller than the condenser thermistor temperature In case of J8 or J9 the system will be shut down when the error is detected at all of operating units Supposed Causes Connector in poor contact Thermistor defective Outdoor unit PCB defective Indoor unit PCB defecti...

Page 143: ...lace defective one s of the following thermistors Radiation fin thermistor Discharge pipe thermistor Outdoor unit heat exchanger thermistor Liquid pipe thermistor Gas pipe thermistor Outdoor temperature thermistor Indoor unit heat exchanger thermistor Replace the following thermistor Replace the outdoor unit PCB Replace the indoor unit PCB Normal Connector or thermistor disconnected Error displaye...

Page 144: ...g the radiation fin thermistor with the compressor off Malfunction Decision Conditions With the compressor off the radiation fin temperature is above 80 C The error is cleared when the temperature drops below 70 C Supposed Causes Fin temperature rise due to defective outdoor unit fan Fin temperature rise due to short circuit Fin thermistor defective Connector in poor contact Outdoor unit PCB defec...

Page 145: ...conditioning is not operated and stops itself when it drops below 70 C Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Replace the fin thermistor Replace the outdoor unit PCB Replace the outdoor unit PCB Replace the fan motor Correct the connectors and fan motor leads Clean up the radiation fin Radiation fin dirty Above 80 C Thermistor as speci...

Page 146: ... above 93 C If a radiation fin temperature rise takes place 255 times successively the system will be shut down The error counter will reset itself if this or any other error does not occur during the following 60 minute compressor running time total time Supposed Causes Fin temperature rise due to defective outdoor unit fan Fin temperature rise due to short circuit Fin thermistor defective Connec...

Page 147: ...rated and stops itself when it drops below 70 C Precaution before turning on the power again NO YES YES Replace the fin thermistor Check if the silicon grease applied properly on the radiation fin If not apply it Note 1 Check the power transistor and fin for looseness If they are found to be fit tightly replace the PCB or the power transistor Replace the outdoor unit PCB Replace the fan motor Corr...

Page 148: ...is running An output over current input is fed from the output over current detection circuit to the microcomputer The system will be shut down if the error occurs 8 times Clearing condition Continuous run for about 11 minutes normal Supposed Causes Over current due to defective power transistor Over current due to wrong internal wiring Over current due to abnormal supply voltage Over current due ...

Page 149: ... the system is interrupted by an input over current check the wires again Normal Error again Stop valve fully open Voltage as rated Any LED off Short circuit or breakage between compressor s coil phases Check No 08 Check the discharge pressure Check No 13 Check the power transistor Turn off the power and reconnect the harnesses Turn on the power again and get restarted Turn off the power and turn ...

Page 150: ...onsumption 4578 256 W Hz Compressor running frequency 638 W However when the status of running frequency 48 Hz is kept on for a certain time If a gas shortage error takes place 4 times successively the system will be shut down The error counter will reset itself if this or any other error does not occur during the following 60 minute compressor running time total time Supposed Causes Refrigerant s...

Page 151: ...k the power transistor harness for looseness Correct it as required Also replace cracked pipe if any Check the pipes for improper contact Correct as required Also replace cracked pipe if any Replace the electronic expansion valve Replace the room temperature or outdoor air thermistor or the indoor unit or outdoor unit heat exchanger thermistor 1 Replace the PCB 2 Replace the compressor Procedure c...

Page 152: ...upposed Causes Supply voltage not as specified Over voltage detector or DC voltage detection circuit defective PAM control part s defective Short circuit inside the fan motor winding Troubleshooting Correct the power supply Replace the outdoor unit PCB Check for such factors for a long term Try to get restarted a couple of times R7150 Caution Be sure to turn off power switch before connect or disc...

Page 153: ...s Operation halt due to unspecified voltage between indoor and outdoor units Supposed Causes Operation halt due to the anti icing function in other rooms Wrong connections at the indoor unit PCB wrongly connected Troubleshooting R7151 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred NO YES NO YES NO YES Error displaying air conditioner...

Page 154: ... presence or absence of zero cross signal Malfunction Decision Conditions 1 When the programme of the microcomputer is in bad running order 2 When indoor outdoor unit signal transmission can not be performed for more than 15 sec 3 When zero cross signal can not be detected for more than 10 sec Supposed Causes Display disabled due to power supply fault Communication circuit fault in outdoor unit PC...

Page 155: ...YES NO Check supply voltage Power on again Check terminal board connecting wire for proper connection Is it damaged Does it have conductivity Does it have conductivity 5 V 0 5 V Rated voltage Firmly connected Check varistor V1 on the outdoor unit PCB Check fuse FU1 on the outdoor unit PCB Check thermal fuse on the terminal board Check 5V and GND on the outdoor unit PCB Rectify the power supply Rep...

Page 156: ... indoor unit PCB The cause seems to be an external factor other than failure of the outdoor unit PCB Investigate source of noise and take measures Investigate the cause of disturbance and take remedial action Check No 10 Check the power supply waveform Does LED A flashing more than 10 times Turn off the power supply Disconnect No 3 terminal and turn on the power supply again Check relay wire betwe...

Page 157: ...ain and check to see if all the EVs generate latching sound 3 If any of the EVs does not generate latching noise in the above step 2 disconnect that connector and check the continuity using a tester Check the continuity between pins 1 3 and 6 and between pins 2 4 and 5 If there is no conductivity between the pins the EV coil is faulty 4 If no EV generates latching sound in the above step 2 the out...

Page 158: ...mal discharge pipe temperature Heating Insufficient gas due to liquid refrigerant stagnation inside the faulty indoor unit Only for heat pump model The unit does not heat the room OL is activated Abnormal discharge pipe temperature Reset power supply and conduct cooling operation unit by unit 3 Valve does not open fully Symptom The unit does not cool nor heat only for heat pump model OL is actuate...

Page 159: ...oil Cooling dry No continuity Heating Continuity Four way valve coil resistance at 1500 ohms S80 voltage at DC 220 240 V with compressor on Fig 1 Turn off the power and turn it on again Start the heating mode run Disconnect the four way valve coil from the connector and check the continuity Replace the outdoor unit PCB Replace the four way valve coil Replace the four way valve ...

Page 160: ...measure the resistance of each thermistor using tester The relationship between normal temperature and resistance is shown in the graph and the table below Thermistor R25 C 20kΩ B 3950 Temperature C 20 211 0 kΩ 15 150 10 116 5 5 88 0 67 2 5 51 9 10 40 15 31 8 20 25 25 20 30 16 35 13 40 10 6 45 8 7 50 7 2 Tester Resistance range R25 20k B 3950 ...

Page 161: ...stallation location or direction Check the outside air temperature temperature of air taken in by the outdoor unit The outside air temperature shall be 46 C or lower Clean the heat exchanger Is the heat exchanger very dirty Check the allowable dimensions of the air suction and discharge area Is the air flow blocked by obstacles or winds blowing in the opposite direction Does the discharged air fro...

Page 162: ... Check to see if there is waveform disturbance near the zero cross sections circled in Fig 2 R7158 Not dirty YES YES Dirty NO NO NO YES Replace compessor Open the stop valve Replace the pipe installed at the site Clean Replace the compressor Discharge pressure check Are the heat exchanger and air filter dirty Is the connection pipe deformed Is the stop valve open High R7159 YES YES NO NO Reconnect...

Page 163: ...s Is the discharge thermister disconnected from the ho Is the temperature of the four way valve suction pipe abnormaly high Refrigerant system check Check for gas leaks See the section on insufficient gas detection Conduct the check after operating the equipment for a sufficient length of time R7160 YES YES YES NO NO NO Correct the problem Conduct vacuum drying Replace the refrigerant Four way val...

Page 164: ...acitor Never touch any live parts for at least 10 minutes after turning off the circuit breaker If unavoidably necessary to touch a live part make sure there is no DC voltage using the tester Check the continuity with the tester Reverse the pins and make sure there is continuity Tester s negative terminal Power transistor UVW Power transistor UVW Tester s positive terminal UVW Power transistor UVW...

Page 165: ...an too If the voltage in Step 2 is not applied it means the PCB is defective Replace the PCB If the pulse in Step 4 is not available it means the Hall IC is defective Replace the DC fan motor If there are both the voltage 2 and the pulse 4 replace the PCB Propeller fan motor S70 5 1 15 Hall IC Check Check No 16 1 Check the connector connection 2 With the power ON operation OFF and the connector co...

Page 166: ...els and Plates 156 1 2 Removal of the Electrical Box 158 1 3 Removal of the PCB 163 1 4 Removal of the Sound Blanket 168 1 5 Removal of the Propeller Fan Fan Motor 170 1 6 Removal of the Thermistors 173 1 7 Removal of the Compressor 175 1 8 Removal of the Four Way Valve Electronic Expansion Valve 177 ...

Page 167: ...mbling work Step Procedure Points 1 External appearance 2 Loosen the 2 screws right left of the top panel and 8 screws to remove the front panel The front panel has 4 hooks The bell mouth can not be removed R7570 Manufacturer s label Handle Room A Room B R7571 φ6 4 Flare connection Liquid side Gas side φ9 5 Flare connection Outdoor air thermistor R7572 Top panel Hooks Discharge grille Front panel ...

Page 168: ...harge grille When reassembling make sure to fit the 4 hooks 4 Loosen the 2 screws of the stop valve cover and remove it The stop valve cover is united with the shelter When assembling the stop valve cover make sure to fit the 4 hooks Step Procedure Points R7700 R7699 Stop valve cover R7701 ...

Page 169: ...n the terminal board The terminal board is united resin formation 1 Loosen the 2 grounding screws Loosen the 2 screws to remove the wiring fixture Then loosen the all screws for the connectors to disconnect the power supply cable and the connecting wires 2 Remove the electrical box 1 Detach the outdoor air thermistor from the holder 2 Lift up the guard net to remove 4 4 P Room A Room B Power suppl...

Page 170: ...moval of the PCB 4 Detach the lead wire for the fan motor 5 Disconnect the connector for the gas pipe thermistor S91 and for the liquid pipe thermistor S92 S91 Gas pipe thermistor white S92 Liquid pipe thermistor red 6 Disconnect the connector for the overheating protector S40 S40 Overheating protector Step Procedure Points S70 R7578 R7579 S92 S91 R7580 S40 R7581 ...

Page 171: ...EVA S21 Electronic expansion valve EVB S80 Four way valve 8 Undo the wire clip from the electrical box The clip is push mount type 9 Disconnect the connector for the relay harness of compressor 10 Disconnect the 2 connectors for the reactor Step Procedure Points S20 S21 S80 R7582 R7583 R7584 Discharge pipe thermistor R7585 ...

Page 172: ...pe thermistor 12 Disconnect the connector for the thermistor ASSY S90 S90 Thermistor ASSY Outdoor air Heat exchanger Discharge pipe 13 Undo the wire clamp for the thermistor ASSY under the electrical box 14 Loosen the screw on the right side of the electrical box Step Procedure Points R7586 Clip for discharge pipe thermistor Discharge pipe thermistor S90 R7587 R7588 Wire clamp R7589 ...

Page 173: ...Outdoor Unit SiEN12 710A 162 Removal Procedure 15 Loosen the screw in front of the electrical box 16 Lift up the electrical box to remove Step Procedure Points R7590 R7591 ...

Page 174: ...ding to the removal procedure The control PCB is adopted upside down The lead free solder PbF is used on PCB When exchange use exclusive solder and soldering gun 1 Remove the PCB 1 Loosen the screw of the cover of the Electrical box 2 Detach the insulation sheet The trimmed part goes front 3 Loosen the 2 screws of the terminal boards to remove The terminal board is united with temperature fuse 4 U...

Page 175: ...ws and detach the 1 clip to remove the radiation shield plate The clip is push mount type 6 Cut off the clamp and disconnect the wire harnesses Step Procedure Points R7600 Temperature fuse harness Radiation shield plate 2 Clip Hole R7596 Compressor harness R7601 R7597 ...

Page 176: ...move the PCB 8 Lift up the back side slightly and undo the hooks of the front Make sure that the hooks of the electrical box are placed on the PCB 9 Undo the lead wires from the hook and remove the terminal board on the side Step Procedure Points R7598 R7602 R7603 R7604 Terminal board ...

Page 177: ...e temperature fuse and each terminal board See page 20 for detail S20 Electronic expansion valve EVA S21 Electronic expansion valve EVB S70 Fan motor S80 Four way valve S90 Discharge pipe Heat exchanger Outdoor air thermistor S40 Overheating protector Step Procedure Points R7605 R7606 S70 S40 S92 S91 S20 S21 S90 S80 R7607 ...

Page 178: ...SiEN12 710A Outdoor Unit Removal Procedure 167 12 Loosen the 2 screws of the radiation fin Step Procedure Points R7608 R7609 ...

Page 179: ...ve the electrical box 1 Remove the right side panel 1 Loosen the 6 screws to remove the right side panel 2 Remove the partition plate When assembling make sure to catch the lower hook of the partition plate 1 Loosen the 2 screws to remove the partition plate 2 Since there are hooks on the partition plate lift up once and pull out toward yourself to remove it R7610 R7611 R7612 Loosen the screw of t...

Page 180: ...ngs open the sound blanket body and pull it out 2 Lift up the sound blanket top upper to remove Since the piping ports are torn easily remove the blanket carefully 3 Open the sound blanket inner and pull it out 4 Pull out the sound blanket bottom Step Procedure Points R7613 R7614 R7617 R7615 R7616 ...

Page 181: ... supplies before disassembling work Step Procedure Points 1 Remove the propeller fan 1 Loosen the washer fitted nut M10 by an open ended spanner to remove the propeller fan When assembling align mark of the propeller fan with D cut section of the motor shaft 2 Remove the fan motor 1 Disconnect the connector S70 for the fan motor from the PCB R7618 R7619 R7620 S70 R7621 ...

Page 182: ...hows the arrangement of the fan motor lead wire 3 Loosen the 1 screw to remove the fan motor fixing plate When assembling make sure mark of the fan motor goes down 4 Take out the fan motor fixing plate toward yourself Step Procedure Points R7622 R7623 R7624 R7625 ...

Page 183: ... of the lead wire 6 Release the fan motor lead wire When assembling put the lead wire through the back of the motor so as not to be entangled with the propeller fan 7 Loosen the 4 screws and 4 rubber vibration isolators to remove the fun motor Step Procedure Points R7626 R7627 Lead wire Propeller fan R3249 R7628 R7629 ...

Page 184: ... clip and remove the discharge pipe thermistor 2 Cut off the clamp to remove the heat exchanger thermistor The clamp is always reserved Be careful not to lose the clips for each thermistor 3 The outdoor air discharge pipe heat exchanger thermistors are united as one assembly 4 The figure shows the arrangement of the assembly of thermistor S90 2 Remove the liquid gas pipe thermistor 1 Remove the li...

Page 185: ...or Room A Black Room B Gray S92 Liquid pipe thermistor Room A Black Room B Gray 4 The figure shows the arrangement of the assembly of the liquid gas thermistor Meet the edge of the thermistor and the clip Step Procedure Points R7634 R7635 Thermistor Liquid Room A Thermistor Gas Room A Thermistor Liquid Room B Thermistor Gas Room B R7636 ...

Page 186: ...dure Points 1 Remove the terminal cover Be careful so as not to burn the compressor terminals or the name plate Make a note 2 Disconnect the flag shaped terminals 3 Detach the terminals by long nose pliers Undo the hooks by a flat screwdriver to remove the overheating protector 4 Detach the overload protector R7637 Terminal cover Red U Yellow V Blue W R7638 Protection bushing for lead wires R7639 ...

Page 187: ...y valve pipes and so on which were heated up by a gas brazing machine so as not to get burnt your hands Caution From the viewpoint of global environment protection do not discharge the refrigerant gas in the atmosphere Make sure to recover the refrigerant gas with the recovery system Before working make sure that the refrigerant is empty in the circuit Be sure to apply nitrogen replacement when he...

Page 188: ... Caution From the viewpoint of global environment protection do not discharge the refrigerant gas in the atmosphere Make sure to recover the refrigerant gas with the recovery system Detach the four way valve coil and the 2 clamps and then detach the wire harnesses 1 Removed the peripheries Remove Terminal cover of compressor Four way valve coil Electronic expansion valve coil not to burn them by a...

Page 189: ...ore 2 Cut pipes on the main unit by a miniature copper tube cutter in order to make it easy to disconnect Note Do not use a metal saw for cutting pipes by all means because the sawdust come into the circuit The brazed parts are heated after being disconnected To avoid a burn make sure that the compressor is cooled down before removing 4 Provide a protective sheet or a steel plate so that the brazi...

Page 190: ...SiEN12 710A Others 179 Part 8 Others 1 Others 180 1 1 Test Run from the Remote Control 180 1 2 Jumper Settings 181 1 3 Application of Silicon Grease to a Power Transistor and a Diode Bridge 182 ...

Page 191: ... and Testing 1 Measure the supply voltage and make sure that it falls in the specified range 2 Trial operation should be carried out in either cooling or heating mode 3 Carry out the test operation in accordance with the Operation Manual to ensure that all functions and parts such as louver movement are working properly The air conditioner requires a small amount of power in its standby mode If th...

Page 192: ...aws on the electric parts box 4 Cut the jumper JA on PCB Infrared remote control 1 Slide the front cover and take it off 2 Cut the address jumper J4 1 2 2 Jumper Setting R4417 ADDRESS JA ADDRESS JA EXIST 1 CUT 2 ADDRESS J4 EXIST CUT 1 2 J4 R4418 Jumper On indoor control PCB Function When connected factory set When cut JC Power failure recovery function Auto restart Unit does not resume operation a...

Page 193: ...transistor and the diode bridge Applying the paste should be implemented in accordance with the following instruction Remark There is the possibility of failure with smoke in case of bad heat radiation To completely wipe off the old silicon grease on a heat radiation fin To evenly apply the silicon grease to the whole Do not have any foreign object such as solder or paper waste between the power t...

Page 194: ...SiEN12 710A Appendix 183 Part 9 Appendix 1 Piping Diagrams 184 1 1 Indoor Units 184 1 2 Outdoor Units 185 2 Wiring Diagrams 186 2 1 Indoor Units 186 2 2 Outdoor Units 187 ...

Page 195: ...ssy 4D047912G M CDKS35CVMB CDXS25CVMA CDXS35CVMA FDXS25CVMB FDXS35CVMB FDXS25EAVMB FDXS35EAVMB CDKS25CVMA CDKS50CVMA CDKS60CVMA CDXS50DVMT CDXS60DVMT CDKS50DVMT CDKS60DVMT CDKS35CVMA CDXS25DVMT CDXS35DVMT CDKS25DVMT CDKS35DVMT CDXS35CVMB CDKS25CVMB CDXS25CVMB CDKS60CVMB CDXS50CVMA CDXS60CVMA CDXS60CVMB CDKS50CVMB CDXS50CVMB FDKS25CVMB FDKS35CVMB FDXS25CAVMB FDXS35CAVMB FDKS25CAVMB FDKS35CAVMB FDKS...

Page 196: ...ED VALVE MOTOR OPERATED VALVE LIQUID LINE STOP VALVE LIQUID LINE STOP VALVE BRANCH PIPE BRANCH PIPE MUFFLER MUFFLER MUFFLER HEAT EXCHANGER THERMISTOR COMPRESSOR MUFFLER MUFFLER EVA 7 9CuT M 9 5CuT EVB 6 4CuT 6 4CuT 9 5CuT 9 5CuT 6 4CuT 9 5CuT 4 8CuT 9 5CuT 9 5CuT 6 4CuT 4 8CuT 7 9CuT 9 5CuT 7 9CuT 9 5CuT 9 5CuT 6 4CuT 3D057467B REFRIGERANT FLOW COOLING HEATING OUTDOOR UNIT OUTDOOR TEMPERATURE THER...

Page 197: ...STOR S1 S38 CONNECTOR S1W OPERATION SWITCH X1M TERMINAL STRIP PROTECTIVE EARTH INFRARED REMOTE CONTROL SIGNAL RECEIVER INDOOR INTELLIGENT EYE SENSOR 3D046453B PCB2 H1P H2P S1W H3P 2RTH1 R1T t 10 1 S1 1 C1 BRN F1U S26 2 PCB1 S32 R2T t 1 10 BRN S21 1 3 1 S7 BLU GRY PPL S1 RED 6 V1TR 1 M1F M 3 BLK Q1M 130 C 1 WHT YLW C1 3 15A F1U Q1M M1F V1TR S1W X1M Z1C H1P H3P R1T R2T PCB1 PCB2 S1 S32 RTH1 GND H2 H...

Page 198: ...B LIQUID PIPE ROOM A ROOM B GAS PIPE Y1E ROOM A Y2E ROOM B RT1 R2T R3T OUTDOOR DISCHARGE CONDENSER 3D055671B DB1 DB2 MRM20 MRM10 6 BLK BLK BLK 1 S90 BLK R1T BLK R2T R3T BLK N L FIELD WIRING L1 R7T 6 BRN BLU ORG 1 BLK Y2E R8T WHT BLK S20 WHT R5T YLW YLW 1 GRY WHT 4 4 S91 WHT GRY M 1 Y1E ORG GRY BRN 6 1 BLU BLK BLK M RED RED S21 RED GRY R6T S92 RED V1 ORG L1R BRN HR2 1 Z2C Q1L GRN M1C 3 S45 7 TFU 10...

Page 199: ...Wiring Diagrams SiEN12 710A 188 Appendix ...

Page 200: ...erload 119 compressor protection function 47 compressor sensor system abnormality 127 connectors 16 18 20 control PCB 40 class 21 control PCB 50 class 21 control PCB indoor unit 17 19 control PCB outdoor unit 143 D DB1 20 DB2 20 DC fan lock 121 DC voltage DC current sensor abnormality 130 defrost control 51 diagnosis mode 106 diode bridge 182 discharge pipe 55 discharge pipe temperature 55 dischar...

Page 201: ... 109 input current control 48 input over current detection 122 installation condition check 150 instruction 61 insufficient gas 139 insufficient gas control 56 INTELLIGENT EYE 33 INTELLIGENT EYE operation 83 INTELLIGENT EYE sensor PCB 17 inverter POWERFUL operation 36 inverter units refrigerant system check 152 J J3 20 131 J4 20 181 J6 131 J8 131 J9 131 JA 16 18 181 JB 16 18 181 JC 16 18 181 jumpe...

Page 202: ...6 16 S40 20 S45 20 S6 16 S7 18 S70 20 S80 20 S90 20 S91 20 S92 20 safety precautions 62 SC control 54 self diagnosis digital display 38 sensor malfunction detection 56 service check function 105 signal receiver PCB 17 signal receiving sign 37 signal transmission circuit abnormality 143 silicon grease 182 specification 8 starting operation 54 SW1 16 18 T test run 180 thermistor discharge pipe therm...

Page 203: ...SiEN12 710A iv Index ...

Page 204: ...k 146 fan motor or related abnormality AC motor 112 DC motor 113 four way valve performance check 148 freeze up protection control 49 117 freeze up protection control or high pressure control 110 frequency control 43 frequency principle 24 front panel open close fault 116 function of thermistor cooling only model 41 heat pump model 39 H Hall IC check 154 heating peak cut control 49 high pressure c...

Page 205: ...n 28 R radiation fin temperature rise 135 S signal receiver PCB 17 silicon grease 182 T target discharge pipe temperature control 55 thermistor or related abnormality indoor unit 115 thermistor or related abnormality outdoor unit 131 thermistor resistance check 149 thermostat control 30 trial operation from remote control 180 turning speed pulse input on the outdoor unit PCB check 154 W wiring dia...

Page 206: ...ication to the best of its knowledge No express or implied warranty is given for the completeness accuracy reliability or fitness for particular purpose of its content and the products and services presented therein Specifications are subject to change without prior notice Daikin Europe N V explicitly rejects any liability for any direct or indirect damage In the broadest sense arising from or rel...

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