Daikin FTKS25BVMB, Service Manual

Page 1: ...SiBE04 302 Inverter Pair Wall Mounted Type B Series Applied Models z z z zInverter Pair Cooling Only z z z zInverter Pair Heat Pump Service Manual...

Page 2: ...VMB FTS20BVMB FTKS35BVMB ATKS35BVMB FTK35BVMB ATK35BVMB FTS25BVMB FTS35BVMB Outdoor Unit RKS25BVMB ARKS25BVMB RK25BVMB ARK25BVMB RS20BVMB RKS35BVMB ARKS35BVMB RK35BVMB ARK35BVMB RS25BVMB RS35BVMB zHea...

Page 3: ...ction 34 1 5 Automatic Operation 35 1 6 Night Set Mode 36 1 7 Intelligent Eye 37 1 8 Home Leave Operation 39 1 9 Inverter Powerful Operation 40 1 10 Other Functions 41 2 Function of Main Structural Pa...

Page 4: ...4 2 Indoor Unit PCB Abnormality 92 4 3 Freeze up Protection Control or High Pressure Control 93 4 4 Fan Motor AC Motor or Related Abnormality 95 4 5 Thermistor or Related Abnormality Indoor Unit 96 4...

Page 5: ...mouth and Left Side Plate 155 2 3 Removal of PCB and Electrical Box 156 2 4 Removal of Propeller Fan and Fan Motor 162 2 5 Removal of Compressor Noise Absorption Pad 164 2 6 Removal of Partition Plat...

Page 6: ...lug socket before disassembling the equipment for a repair Working on the equipment that is connected to a power supply can cause an electrical shook If it is necessary to supply power to the equipmen...

Page 7: ...he applicable model and appropriate tools to conduct repair work Never attempt to modify the equipment The use of inappropriate parts or tools can cause an electrical shock excessive heat generation o...

Page 8: ...ce valve to prevent the refrigerant gas from leaking into the room The refrigerant gas itself is harmless but it can generate toxic gases when it contacts flames such as fan and other heaters stoves a...

Page 9: ...al shock Be sure to measure the insulation resistance after the repair and make sure that the resistance is 1 Mohm or higher Faulty insulation can cause an electrical shock Be sure to check the draina...

Page 10: ...SiBE04 302 List of Function 1 Part 1 List of Function 1 Functions 2 1 1 Cooling Only 2 1 2 Heat Pump 5...

Page 11: ...Swing Right and Left Worry Free Reliability Durability Auto Restart after Power Failure 3 D Airflow Self Diagnosis Digital LED Display 3 Step Airflow H P Only Wiring Error Check Comfort Control Auto F...

Page 12: ...t Worry Free Reliability Durability Auto Restart after Power Failure 3 D Airflow Self Diagnosis Digital LED Display 3 Step Airflow H P Only Wiring Error Check Comfort Control Auto Fan Speed Anticorros...

Page 13: ...ity Durability Auto Restart after Power Failure 3 D Airflow Self Diagnosis Digital LED Display 3 Step Airflow H P Only Wiring Error Check Comfort Control Auto Fan Speed Anticorrosion Treatment of Outd...

Page 14: ...Swing Right and Left Worry Free Reliability Durability Auto Restart after Power Failure 3 D Airflow Self Diagnosis Digital LED Display 3 Step Airflow H P Only Wiring Error Check Comfort Control Auto F...

Page 15: ...and Left Worry Free Reliability Durability Auto Restart after Power Failure 3 D Airflow Self Diagnosis Digital LED Display 3 Step Airflow H P Only Wiring Error Check Comfort Control Auto Fan Speed An...

Page 16: ...liability Durability Auto Restart after Power Failure 3 D Airflow Self Diagnosis Digital LED Display 3 Step Airflow H P Only Wiring Error Check Comfort Control Auto Fan Speed Anticorrosion Treatment o...

Page 17: ...Functions SiBE04 302 8 List of Function...

Page 18: ...SiBE04 302 Specifications 9 Part 2 Part 2 Part 2 Part 2 Specifications Specifications Specifications Specifications 1 Specifications 10 1 1 Cooling Only 10 1 2 Heat Pump 16...

Page 19: ...ght Left Horizontal and Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 Power Consumption Rated W 40 40 Power Factor 96 6 96 6 Tem...

Page 20: ...al and Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 Power Consumption Rated W 40 40 Power Factor 96 6 96 6 Temperature Control...

Page 21: ...ntal and Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 Power Consumption Rated W 40 40 Power Factor 96 6 96 6 Temperature Contro...

Page 22: ...ntal and Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 Power Consumption Rated W 40 40 Power Factor 96 6 96 6 Temperature Contro...

Page 23: ...Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 Power Consumption Rated W 40 40 Power Factor 96 6 96 6 Temperature Control Microcomputer Control Microcomputer Control Dimensio...

Page 24: ...ward Air Filter Removable Washable Mildew Proof Running Current Rated A 0 18 Power Consumption Rated W 40 Power Factor 96 6 Temperature Control Microcomputer Control Dimensions H W D mm 273 784 185 Pa...

Page 25: ...eft Horizontal and Downward Right Left Horizontal and Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 0 18 0 18 Power Consumption...

Page 26: ...izontal and Downward Right Left Horizontal and Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 0 18 0 18 Power Consumption Rated W...

Page 27: ...ght Left Horizontal and Downward Right Left Horizontal and Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 0 18 0 18 Power Consump...

Page 28: ...ght Left Horizontal and Downward Right Left Horizontal and Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 0 18 0 18 Power Consump...

Page 29: ...e Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 0 18 0 18 Power Consumption Rated W 40 40 40 40 Power Factor 96 6 96 6 96 6 96 6 Temperature Control Microcomp...

Page 30: ...Downward Air Filter Removable Washable Mildew Proof Running Current Rated A 0 18 0 18 Power Consumption Rated W 40 40 Power Factor 96 6 96 6 Temperature Control Microcomputer Control Dimensions H W D...

Page 31: ...Specifications SiBE04 302 22 Specifications...

Page 32: ...rt 3 Printed Circuit Board Printed Circuit Board Printed Circuit Board Printed Circuit Board Connector Wiring Diagram Connector Wiring Diagram Connector Wiring Diagram Connector Wiring Diagram 1 Print...

Page 33: ...ED3 1 S1 Connector for fan motor 2 S6 Connector for swing motor Horizontal Flap 3 S7 Connector for fan motor 4 S21 Connector for centralized control to 5 rooms 5 S27 S36 Connector for control PCB 6 S2...

Page 34: ...nted Circuit Board Connector Wiring Diagram 25 Outline of PCB GRN YLW RED LED1 LED2 LED3 Signal receiver PCB 2 S27 SW7 Control PCB 1 S1 S7 S6 S26 S32 S35 S21 S36 Intelligent eye sensor PCB 3 5V check...

Page 35: ...Printed Circuit Board Connector Wiring Diagram SiBE04 302 26 Printed Circuit Board Connector Wiring Diagram Detail of PCB S1 SW7 PCB 2 S27 S7 S6 S26 S32 JC JB JA S35 S36 PCB 3 PCB 1 S21 2P084366H...

Page 36: ...it board 1 Printed circuit board 2 Name of Connector Outline of PCB 1 S10 Connector for PCB 2 2 S11 Connector for PCB 1 3 S30 Connector for compressor motor 4 S70 Connector for fan motor 5 S80 Connect...

Page 37: ...Printed Circuit Board Connector Wiring Diagram SiBE04 302 28 Printed Circuit Board Connector Wiring Diagram Detail of PCB 1 Detail of PCB 2 Connect to S11 on PCB 2 3P100242 1B...

Page 38: ...1 10 Other Functions 41 2 Function of Main Structural Parts 42 2 1 Main Structural Parts 42 2 2 Function of Thermistor 43 3 Control Specification 45 3 1 Mode Hierarchy 45 3 2 Frequency Control 46 3 3...

Page 39: ...plains 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 pow...

Page 40: ...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...

Page 41: ...sses the warm air above the floor to reach the entire room Cooling Mode During cooling mode the flap retracts into the indoor unit Then cool air can be blown far and pervaded all over the room Wide An...

Page 42: ...e 1 During powerful operation fan operate H tap 50 90 rpm 2 Fan stops during defrost operation Automatic Air Flow Control for Heating The following drawing explains the principle for fan speed control...

Page 43: ...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 Roo...

Page 44: ...er setting temperature plus correction value correction value cooling 0 deg heating 2 deg 3 Operation ON OFF point and mode switching point are as follows Heating Cooling switching point Room temperat...

Page 45: ...ght Set circuit continues heating or cooling the room at the set temperature for the first one hour then automatically lowers the temperature setting slightly in the case of cooling or raises it sligh...

Page 46: ...microcomputer doesn t have a signal from the sensor in 20 minutes it judges that nobody is in the room and operates the unit in temperature sifted 2 C from the set temperature Cooling 2 C higher Dry 1...

Page 47: ...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...

Page 48: ...d the function becomes effective when the operation is started If this button is pressed in powerful operation the powerful operation is reset and this function becomes effective The HOME LEAVE button...

Page 49: ...eriod of twenty minutes Ex Powerful operation in cooling mode Operation mode Fan speed Target set temperature Cooling H tap 90 rpm 18 C Dry Dry rotating speed 50 rpm Normally targeted temperature in d...

Page 50: ...tocatalytic Deodorizing Filter Photocatalytic Deodorizing Filter demonstrates powerful oxidation characteristics when subjected to harmless ultraviolet light Photocatalytic deodorizing power is recove...

Page 51: ...iBE04 302 42 Function and Control 2 Function of Main Structural Parts 2 1 Main Structural Parts Heat Pump Model Cooling Only Model Four way valve Compressor Electrontic expansion valve R2825 Electront...

Page 52: ...s abnormally the operating frequency drops or the operation must be halted 2 The discharge pipe thermistor is used for detecting the discharge thermistor disconnected C Indoor Heat Exchanger Thermisto...

Page 53: ...ontrol the discharge pipe If the temperature of discharge pipe used in place of the inner temperature of the compressor rises abnormally the operating frequency drops or the operation must be halted 2...

Page 54: ...cooling including drying Note Unless specified otherwise an indoor dry operation command must be regarded as cooling operation Air conditioner control mode Forced operating mode Forced cooling for Pu...

Page 55: ...eeze up protection defrost 3 Determine lower limit frequency Set a maximum value as an lower limit frequency among the frequency lower limits of the following functions Four way valve operating compen...

Page 56: ...requency previously calculated 2 I control If the operating frequency is not change more than a certain fixed time adjust the frequency up and down according to the D value obtaining the fixed D value...

Page 57: ...e operation stopped Detail The OFF delay of four way valve Energize the coil for 150 sec after unit operation is stopped 3 3 3 Four Way Valve Operation Compensation Outline Heat Pump Only At the begin...

Page 58: ...operation stops If a drooping current is continues for 1 0 second after rushing on the drooping zone the frequency will be 2 Hz drooping Repeating the above drooping continues until the current rushe...

Page 59: ...start with the indoor heat exchanger temperature after 2 sec from operation start Control in Each Zone 3 7 Heating Peak cut Control Outline Heat Pump Only During heating operation the signals being s...

Page 60: ...ich is the primary purpose of the compressor the lower limit of the output frequency is limited to two stages under the condition of outside air temperature This time in addition to this purpose this...

Page 61: ...s of the temperature of the outdoor air and outdoor heat exchanger Detail Operation stop depending on the outdoor air temperature Compressor operation turns OFF under the conditions that the system is...

Page 62: ...tdoor air temperature and heat exchanger temperature Under the conditions that the system is in heating operation 6 minutes after the compressor is started and more than 44 minutes of accumulated time...

Page 63: ...scharge pipe temperature control Detail The followings are the examples of control which function in each mode by the electronic expansion valve control R2833 Fully closed when power is turned ON Open...

Page 64: ...3 12 6 Disconnection of the Discharge Pipe Thermistor Outline Detect a disconnected discharge pipe thermistor by comparing the discharge pipe temperature with the condensation temperature If any is d...

Page 65: ...ft 3 12 8 Target Discharge Pipe Temperature Control Obtain the target discharge pipe temperature from the indoor and outdoor heat exchanger temperature and adjust the electronic expansion valve openin...

Page 66: ...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 55 pul...

Page 67: ...t abnormal and not in the 3 minute stand by mode 2 The operating mode of the outdoor unit is the stop mode 3 The forced operation is ON The forced operation is allowed when the above and conditions ar...

Page 68: ...ecautions 61 2 2 Names of Parts 63 2 3 Preparation before Operation 66 2 4 AUTO DRY COOL HEAT FAN Operation 69 2 5 Adjusting the Air Flow Direction 71 2 6 POWERFUL Operation 73 2 7 OUTDOOR UNIT SILENT...

Page 69: ...ver 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 in...

Page 70: ...out repairs accompanying adding refrigerant check the content of the repairs with our service staff Do not attempt to install the air conditioner by your self Incorrect work will result in water leaka...

Page 71: ...re smooth drainage Incomplete draining may cause wetting of the building furniture etc Do not operate the air conditioner with wet hands Do not wash the indoor unit with excessive water only use a sli...

Page 72: ...SiBE04 302 Instruction In case of FTK X S 25 35 BVMB System Configuration 63 2 2 Names of Parts 4 Names of parts Indoor Unit ON OFF 1 3 4 5 6 7 9 10 11 14 15 16 8 12 13 2...

Page 73: ...page 10 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 controller is missing 13 Operation l...

Page 74: ...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 page 10 8 SILENT button for OUTDOOR UNIT SILENT...

Page 75: ...teries of the same type and replace 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 controll...

Page 76: ...the sig nals reach the unit 2 Fix the holder to a wall a pillar etc with the screws supplied with the holder 3 Place the remote controller in the remote controller holder ATTENTION About remote contro...

Page 77: ...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 disabl...

Page 78: ...Each pressing of the button advances the mode setting in sequence AUTO DRY COOL HEAT FAN 2 Press ON OFF button The OPERATION lamp lights up To stop operation 3 Press ON OFF button again Then OPERATION...

Page 79: ...m by circulating hot air around all parts of the room After the start of heating operation it takes some time before the room gets warmer In heating operation frost may occur on the outdoor unit and l...

Page 80: ...direction to increase your com fort To adjust the horizontal blades flaps 1 Press SWING button The display will light up and the flaps will begin to swing 2 When the flaps have reached the desired pos...

Page 81: ...ing range depends on the operation mode See the figure ATTENTION Always use a remote controller to adjust the flaps angle If you attempt to move it forcibly with hand when it is swinging the mechanism...

Page 82: ...are some functions which are not available To cancel POWERFUL operation 2 Press POWERFUL button again NOTE Notes on POWERFUL operation In COOL and HEAT mode To maximize the cooling heating effect the...

Page 83: ...ation If using a multi system this function will work only when the OUTDOOR UNIT SILENT operation is set on all operated indoor units However if using priority room setting see Note for multi system p...

Page 84: ...on 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...

Page 85: ...u return you will be wel comed by a comfortably air condi tioned room Push the HOME LEAVE Operation button again and the air conditioner will adjust capacity to the set tem perature for normal operati...

Page 86: ...human movement To start INTELLIGENT EYE operation 1 Press SENSOR button To cancel the INTELLIGENT EYE operation 2 Press SENSOR button again EX C TEMP ON OFF POWERFUL HOME LEAVE MODE TIMER FAN SWING S...

Page 87: ...r may not detect moving objects further than 5m away Check the application range Sensor detection sensitivity changes according to indoor unit location the speed of pass ersby temperature range etc Th...

Page 88: ...either button changes 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 Notes When TIMER is se...

Page 89: ...on changes the setting rapidly 3 Press ON TIMER button again The TIMER lamp lights up To cancel ON TIMER operation 4 Press CANCEL button The TIMER lamp goes off To combine ON TIMER and OFF TIMER A sam...

Page 90: ...ach the front grille Set the 3 keys of the front grille into the slots and push them in all the way Close the front grille slowly and push the grille at the 3 points 1 on each side and 1 in the middle...

Page 91: ...e off easily wash them with neutral detergent thinned with lukewarm water then dry them up in the shade It is recommended to clean the air filters every two weeks Air Purifying Filter green Replace ap...

Page 92: ...in water is seen water may be leaking from the indoor unit Stop operation and consult the ser vice shop if this is the case Operation with dirty filters 1 cannot deodorize the air 2 cannot clean the a...

Page 93: ...melts into water or steam 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...

Page 94: ...re anything to 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 t...

Page 95: ...ditions the inside of the air conditioner may get foul after several seasons of use resulting in poor performance It is recommended to have periodical maintenance by a specialist aside from regular cl...

Page 96: ...ormality Indoor Unit 96 4 6 Signal Transmission Error between Indoor and Outdoor Units 97 4 7 OL Activation Compressor Overload 98 4 8 Compressor Lock 99 4 9 Input Over Current Detection 100 4 10 Four...

Page 97: ...ment operation 2 When a signal transmission error occurs between the indoor and outdoor units In either case conduct the diagnostic procedure described in the following pages Location of Operation Lam...

Page 98: ...C or higher only for heat pump model and cooling operation cannot be used when the outdoor air temperature is below 10 C Note Diagnosis with remote controller indication 91 Equipment operates but does...

Page 99: ...uous beep is produced The code indication changes in the sequence shown below and notifies with a long beep Note 1 A short beep and two consecutive beeps indicate non corresponding codes 2 To cancel t...

Page 100: ...ity 96 C9 Room temperature thermistor abnormality 96 Outdoor Unit E5 OL activation compressor overload 98 E6 Compressor lock 99 E8 Input over current detection 100 EA Four way valve abnormality 101 F3...

Page 101: ...s detection in approximately 10 continuous seconds Supposed Causes Faulty indoor unit PCB Faulty connector connection Troubleshooting Note Connector Nos vary depending on models Connector connection c...

Page 102: ...ccording 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...

Page 103: ...nger thermistor check Check the intake air filter Check the air passage YES YES R1401 Check the dust accumulation on the indoor unit heat exchanger YES YES Is there any short circuit Is it very dirty...

Page 104: ...ue to faulty indoor unit PCB Troubleshooting Check No 16 Refer to P 127 Rotate the fan by hand Check No 16 Check hall IC Operate the fan Does it rotate NO Does it rotate smoothly Is there an output Is...

Page 105: ...n 120 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 6 Re...

Page 106: ...al transmission error due to breaking of wire in the connection wires between the indoor and outdoor units wire No 2 Troubleshooting Check No 10 Refer to P 125 Check the outdoor unit s LED A Check the...

Page 107: ...bleshooting Check No 4 Refer to P 120 Check No 5 Refer to P 121 Check No 6 Refer to P 122 Check No 11 Refer to P 125 Insert the thermistor in position Replace the discharge pipe thermistor Replace the...

Page 108: ...nutes normal Supposed Causes Compressor locked Troubleshooting Note If the model doesn t have SPM replace the outdoor unit PCB Turn off the power Disconnect the harnesses U V and W Inverter checker Pa...

Page 109: ...model doesn t have SPM replace the outdoor unit PCB Replace the outdoor unit PCB Inverter checker Part No 1225477 Correct the power supply or replace the SPM Replace the outdoor unit PCB R2952 Caution...

Page 110: ...ked to see if they function within their normal ranges in the operating mode Malfunction Decision Conditions A following condition continues over 10 minute after operating 5 minutes Cooling dry operat...

Page 111: ...ower switch before connect or disconnect connector or parts damage may be occurred Four way valve coil disconnected loose YES YES NO Functioning NO Check No 11 Check the refrigerant line Malfunctionin...

Page 112: ...tdoor air temperature thermistor defective Outdoor unit PCB defective Water mixed in the local piping Electronic expansion valve defective Stop valve defective Troubleshooting Check No 4 Refer to P 12...

Page 113: ...onnected Compressor relay cable disconnected Compressor itself defective Outdoor unit PCB defective Stop valve closed Input voltage out of specification Troubleshooting Check No 13 Refer to P 126 Repl...

Page 114: ...sion Conditions The compressor running frequency is below 62 Hz and the CT input is below 0 1 V The input current is also below 0 5 A If this error repeats 4 times the system will be shut down The err...

Page 115: ...on Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Running current as shown at right with relay cable 1 or 2 YES Current guideline 2 sec Time Ri...

Page 116: ...ature Malfunction Decision Conditions The thermistor input is above 4 96 V or below 0 04 V with the power on Error J3 is judged if the discharge pipe thermistor temperature is smaller than the condens...

Page 117: ...unit heat exchanger temperature thermistor l Outdoor air thermistor Replace the following thermistor l Indoor unit heat exchanger thermistor Replace the outdoor unit PCB Replace the indoor unit PCB R2...

Page 118: ...ing the radiation fin thermistor with the compressor off Malfunction Decision Conditions With the compressor off the radiation fin temperature is above 122 C Reset is made when the temperature drops b...

Page 119: ...ion Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Error again or outdoor unit fan activated YES l Fin thermistor NO Slightly dirty Check No 9...

Page 120: ...adiation fin temperature with the compressor on is above 81 C If a radiation fin temperature rise takes place 4 times successively the system will be shut down The error counter will reset itself if t...

Page 121: ...or the power transistor Replace the fan motor Correct the connectors and fan motor leads Replace the outdoor unit PCB Clean up the radiation fin R2954 Caution Be sure to turn off power switch before c...

Page 122: ...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 16 times Clearing condition Continuo...

Page 123: ...ave been disconnected and reconnected for part replacement for example and the system is interrupted by an output over current take the following procedure Error again NO YES NO YES Voltage as rated Y...

Page 124: ...ssor running frequency Voltage However when the status of running frequency Hz is kept on for a certain time Note The values are different from model to model Gas shortage detection II If a gas shorta...

Page 125: ...exchanger thermistor 1 Replace the PCB 2 Replace the compressor Procedure complete R2853 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred...

Page 126: ...Continuous run for about 60 minutes normal Supposed Causes Supply voltage not as specified Over voltage detection circuit defective PAM control part s defective Troubleshooting Note If the model doesn...

Page 127: ...ing sensed by the heat exchanger thermistor exceeds the limit Malfunction Decision Conditions Activated when the temperature being sensed by the heat exchanger thermistor rises above 60 C Deactivated...

Page 128: ...the connector 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 Change the...

Page 129: ...y using a tester Check the conductivity 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...

Page 130: ...nit PCB Replace the four way valve coil Replace the four way valve R3047 NO Four way valve coil Cooling dry No continuity Heating Continuity YES YES Four way valve coil resistance at 3k 0 5k NO S80 vo...

Page 131: ...rs on the PCB and 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 20k B 395...

Page 132: ...er Change the installation location or direction Check the outside air temperature temperature of air taken in by the outdoor unit The outside air temperature shall be 43 C or lower Check the allowabl...

Page 133: ...ilter dirty Is the stop valve open Is the connection pipe deformed YES High Check the fan motor lead wire connector for secure connection Abnormal YES NO NO Continuity Are the resistance at connector...

Page 134: ...eform disturbance near the zero cross sections circled in Fig 2 5 1 8 Inverter Units Refrigerant System Check Check No 11 Fig 1 Fig 2 Refrigerant system check Check for gas leaks See the section on in...

Page 135: ...and capacitor voltage can be measured at the power transistor and terminals 5 1 10 Power Transistor Check Check No 13 Note Check to make sure that the voltage between the terminal of Power transistor...

Page 136: ...age of about 5 V between pins 1 and 3 Generation of 3 pulses between pins 2 and 3 when the fan motor is operating Failure of 1 faulty PCB Replace the PCB Failure of 2 faulty hall IC Replace the fan mo...

Page 137: ...Check SiBE04 302 128 Service Diagnosis...

Page 138: ...rd and Swing Motor 138 1 5 Removal of Heat Exchanger 144 1 6 Install of Drain Plug 147 1 7 Removal of Fan Rotor and Fan Motor 148 2 Outdoor Unit 152 2 1 Removal of External Casing 152 2 2 Removal of B...

Page 139: ...l features If ON OFF button is kept pushing for 5 seconds a forced cooling operation will be carried out for approx 15 minutes 2 Removing air filters 1 Pull protrusions on left and right sides of pane...

Page 140: ...provided on the both sides of the unit s panel and open up the panel to the position higher than it will stop Support the front panel by one hand while remove the rotation axis at the upper center by...

Page 141: ...Indoor Unit SiBE04 302 132 Removal Procedure 3 When restoring the air filter make sure that the projection parts on the panel are in the guide groove and then shut the panel Step Procedure Points...

Page 142: ...ning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Opening and closing of service cover 1 Remove a service cover mounting sc...

Page 143: ...pped in the existing models are not provided 2 Disengage the two hooks on the upper part In case that the hooks are not pressed from above remove the front panel and then remove the grille while pushi...

Page 144: ...Removal Procedure 135 3 The front grille can be removed in a manner to pull out the upper part forward and lift up the lower part When restoring the grille Make sure whether each hook is set as it was...

Page 145: ...fter turning off all power supplies before disassembling work Step Procedure Points 1 Remove horizontal blade 1 Lift horizontal blade to open position Screw stoppers inside the flap which were equippe...

Page 146: ...the blade to the tip while rotating it 2 Restore the two fixed parts of the horizontal blade onto the hook 2 Removal of vertical blade 1 Disengage the vertical blade s joint from the fixed plate 2 Rem...

Page 147: ...efore disassembling work Step Procedure Points Remove front grill 1 Remove switch box 1 Disconnect the connection wires 2 Disconnect connectors S1 and S7 of fan motor Pay attention to the direction of...

Page 148: ...302 Indoor Unit Removal Procedure 139 5 Remove a screw on the terminal strip The switch box can be removed instead of disengaging the terminal strip 6 Remove a screw on the switch box Step Procedure...

Page 149: ...Indoor Unit SiBE04 302 140 Removal Procedure 7 Pull up the switch box forward to remove A hook is provided on the behind Step Procedure Points...

Page 150: ...Removal of PCB 1 Remove the shelter 2 Disengage the front plate of the switch box Disengage the knobs by pushing the two hooks at the top and the bottom 3 Sliding to the left the front part of the sw...

Page 151: ...Indoor Unit SiBE04 302 142 Removal Procedure 4 Disengage the four knobs on the back of the display PCB 5 Display PCB Step Procedure Points...

Page 152: ...To remove swing motor assembly remove two screws Manual adjusting for the vertical blades Provide a supporter so that the joint link will not drop off in case the horizontal blade assembly is removed...

Page 153: ...into refrigerating cycle Mixing of air or other gas causes abnormal temperature rise in refrigerating cycle and this results in pipe rupture or personal injuries Pay attention so that the residual dr...

Page 154: ...o an angle of 10 to 20 degrees Be careful to prevent pipe deformation 6 Disengage hooks located right and left side and pull heat exchanger forward The hooks are symmetrically placed in the right and...

Page 155: ...146 Removal Procedure 7 Lift and remove heat exchanger Caution When removing or re installing heat exchanger be sure to wear protective gloves or wrap heat exchanger with cloths Fins can cut fingers...

Page 156: ...power supplies before disassembling work Step Procedure Points 1 Disconnect drain hose The drain pan is integrated with the bottom plate 2 Pull out the drain plug in the left on the drain pan by hand...

Page 157: ...7 Removal of Fan Rotor and Fan Motor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points Remove heat exchanger 1...

Page 158: ...SiBE04 302 Indoor Unit Removal Procedure 149 2 Disengage hook 3 Loosen the hexagon head set screw on the fan rotor Step Procedure Points...

Page 159: ...Indoor Unit SiBE04 302 150 Removal Procedure 4 Remove the motor and fan rotor 5 Remove a screw on the left side panel Step Procedure Points...

Page 160: ...val Procedure 151 6 Disengage a hook from the backward 7 Since the fan bearing is made of rubber push it strongly off from the inside The bearing can be removed just as the left side plate is attached...

Page 161: ...n be removed when the fixed screw is removed As three hooks are provided slide the cover downward to remove The forced cooling operation in the pumping down mode can be carried out by pushing the oper...

Page 162: ...the two screws on the front plate 3 Remove the three screws on the left side 4 Remove the one fixed screw in the rear of the top plate Once lift the top plate and then remove it forward The left side...

Page 163: ...l Procedure 5 The front plate and the left side plate can be removed when the one fixed screw is removed Sectional view at the front Step Procedure Points Top plate Left side plate The edge of the top...

Page 164: ...n before disassembling work Step Procedure Points 1 The bell mouth is attached to the front plate with two screws and four hooks Remove the bell mouth from the front plate after removing the two screw...

Page 165: ...rn off all power supplies at least 10 min before disassembling work Step Procedure Points 1 Remove the shelter The shelter has five hooks Be sure to avoid forgetting to restore the shelter and to avoi...

Page 166: ...SiBE04 302 Outdoor Unit Removal Procedure 157 2 Remove the four screws fixing the PCB 3 Disconnect the wire harness 4 Disconnect the two connectors of the reactor Step Procedure Points...

Page 167: ...Outdoor Unit SiBE04 302 158 Removal Procedure 5 Undo the eight hooks and the PCB can be disengaged The PCB has eight hooks 6 Disconnect the three wires from the PCB Step Procedure Points...

Page 168: ...SiBE04 302 Outdoor Unit Removal Procedure 159 7 The PCB can completely be released 3 Remove the electrical box 1 Remove the two screws fixing the electrical box Step Procedure Points...

Page 169: ...Outdoor Unit SiBE04 302 160 Removal Procedure 2 Lift and remove the electrical box 4 Remove the molded interconnect device MID 1 Remove the one screw fixing the MID Step Procedure Points...

Page 170: ...SiBE04 302 Outdoor Unit Removal Procedure 161 2 Slide the MID upward and release Step Procedure Points...

Page 171: ...Be sure to avoid forgetting to restore the shelter and to avoid loosing or damaging it When restoring match the mark of the propeller fan with the D cut of the motor shaft The fan should be restored s...

Page 172: ...SiBE04 302 Outdoor Unit Removal Procedure 163 4 Remove the fan motor Step Procedure Points...

Page 173: ...e screws for removing the right side plate 2 Lift the right side plate to disengage the hooks Insert the three hooks for the restoration 2 Remove the noise absorber Since the slit prepared for the pip...

Page 174: ...Pull out the top pad of the noise absorption a Since the slit prepared for the piping on the noise absorption pad is torn easily remove the pad carefully 4 Pull out the noise absorption pad b When res...

Page 175: ...Partition Plate and Reactor Procedure Warning Besuretoturnoffallpowersuppliesatleast10min beforedisassemblingwork Step Procedure Points 1 Remove the partition plate 1 Remove the two screws fixing the...

Page 176: ...ng the partition plate fit the hook into the bottom frame 2 Remove the reactor 1 The reactor can be released by removing the fixed screw 3 Remove the reactor assembly 1 Remove the one screw fixing the...

Page 177: ...Outdoor Unit SiBE04 302 168 Removal Procedure 2 Slide the reactor assembly this side and release Step Procedure Points...

Page 178: ...he compressor so as not to be burnt out by a gas brazing machine 2 Remove the thermistor for the heat exchanger The thermistor for the heat exchanger is fixed by a clamp material at one portion Be sur...

Page 179: ...red to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat For the sake of this wrap the four way valve with wet cloth and make up wate...

Page 180: ...er tube cutter in order to make it easy to remove NOTE Don t use a metal saw for cutting pipes by all means because the chips come into the circuit 8 Heat up the two portions of brazing parts on the m...

Page 181: ...fallpowersuppliesatleast10min beforedisassemblingwork Step Procedure Points 1 Remove the parts around the compressor Be careful so as not to burn the compressor terminals or the name plate 1 Remove th...

Page 182: ...nit Removal Procedure 173 2 The mounting nut for the compressor is only one piece Remove the four way valve and the motor valve also so as not to be burnt out 3 Remove the nut by an open end wrench St...

Page 183: ...If the refrigerant is exposed to the fire it will cause toxic gas Caution Be careful about pipes and so on which were heated up by a gas brazing machine so as not to get burnt on your hands Pay atten...

Page 184: ...SiBE04 302 Others 175 Part 8 Others 1 Others 176 1 1 Explanation 176 1 2 Jumper Settings 177...

Page 185: ...ribed below Trial operation from Remote Controller 1 Press ON OFF button to turn on the system 2 Simultaneously press center of TEMP button and MODE buttons 3 Press MODE button twice T will appear on...

Page 186: ...ectric parts box Cut the jumper JA on PCB Wireless remote controller Cut the jumper J4 1 2 2 Jumper Setting Wireless remote controller Address J4 CUT EXIST 1 2 JA ADDRESS J4 ADDRESS CUT EXIST 1 2 JA J...

Page 187: ...ush and slide the sensor to adjust the angle Aim so that the sensor is pointing to the center of the room or to the part of the room that is most frequently used After adjusting the angle gently wipe...

Page 188: ...2 Appendix 179 Part 9 Part 9 Part 9 Part 9 Appendix Appendix Appendix Appendix 1 Piping Diagrams 180 1 1 Indoor Units 180 1 2 Outdoor Units 181 2 Wiring Diagrams 183 2 1 Indoor Units 183 2 2 Outdoor U...

Page 189: ...35BVMB ATK25 35BVMB FTS20 25 35BVMB FTXS25 35BVMB ATXS25 35BVMB FTX25 35BVMB ATX25 35BVMB FTYS20 25 35BVMB FIELD PIPING FIELD PIPING 6 4CuT 9 5CuT 7 9CuT CROSS FLOW FAN REFRIGERANT FLOW FAN MOTOR ON H...

Page 190: ...FLER 9 5CuT 6 4CuT MUFFLER MUFFLER 6 4CuT 6 4CuT FILTER FILTER WITH WITH VALVE LIQUID STOP VALVE GAS STOP FIELD PIPING FIELD PIPING 6 4CuT 9 5CuT 3D039304 OUTDOOR UNIT MUFFLER 7 9CuT THERMISTOR DISCHA...

Page 191: ...uT MUFFLER 6 4CuT 6 4CuT FILTER FILTER LIQUID RECEIVER WITH WITH VALVE LIQUID STOP VALVE GAS STOP FIELD PIPING FIELD PIPING 6 4CuT 9 5CuT 3D039302 9 5CuT 7 9CuT 7 9CuT THERMISTOR DISCHARGE PIPE MUFFLE...

Page 192: ...R CONNECTOR PRINTED CIRCUIT BOARD PILOT LAMP WHT RED BLK YLW X1M 2 3 1 NOTE THAT OPERATION WILL THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK RESTART AUTOMATICALLY IF ON AGAIN CAUTION FIELD WIRING...

Page 193: ...T 6 DB2 GRY S20 IC3 X30A OL2 1 BLK 6 2 C12 C13 t BLK Q1L R4T BLK S91 FIN BLK OL1 C15 C14 GRY GRY N BRN BRN W N W 3D038018B M1C W TRM1 BLU BLU V U V YLW V YLW U U Z1C RED RED 1 NOTE N L 1 REFER TO THE...

Page 194: ...RY S20 IC3 X30A OL2 1 BLK 6 2 C12 C13 t BLK Q1L R4T BLK S91 FIN BLK OL1 C14 C15 GRY GRY N BRN BRN W N W 3D038015B M1C W TRM1 BLU BLU V U V YLW V YLW U U Z1C RED RED 1 NOTE N L 1 REFER TO THE NAMEPLATE...

Page 195: ...Wiring Diagrams SiBE04 302 186 Appendix...

Page 196: ...ult 91 External Casing 152 F F3 103 F6 118 Fan Control 51 Fan Motor 148 162 Fan Motor AC Motor or Related Abnormality 95 Fan Rotor 148 Fan Speed Control for Indoor Units 33 Forced Operation Mode 58 Fo...

Page 197: ...or Check 126 Power Airflow Dual Flaps 32 POWERFUL Operation 73 Powerful Operation Mode 58 Preheating Operation 48 Preparation before Operation 66 Printed Circuit Board Connector Wiring Diagram 24 Prob...

Page 198: ...SiBE04 302 Index iii V V1 24 vertical blade 137 Voltage Detection Function 58 W Wide Angle Louvres 32 Wiring Diagrams 183...

Page 199: ...SiBE04 302 iv Index...

Page 200: ...ssure Control in Cooling 118 Home Leave Operation 39 I Indoor Unit PCB Abnormality 92 Input Current Control 49 Input Over Current Detection 100 Installation Condition Check 123 Insufficient Gas 115 In...

Page 201: ...323 Japan Tokyo office Shinjuku Sumitomo Bldg 6 1 Nishi Shinjuku 2 chome Shinjuku ku Tokyo 163 0235 Japan Zandvoordestraat 300 B 8400 Oostende Belgium z For further improvement specifications or desig...