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Daikin ARK25BVMB, Service Manual

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Daikin ARK25BVMB Service Manual Download Page 131

Check

SiBE04-302

122

Service Diagnosis

5.1.3

Thermistor Resistance Check

Check No.6

Remove the connectors of the thermistors 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

Ω

 B=3950

Temperature (°C)

-20

211.0 (k

Ω

)

-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

Summary of Contents for ARK25BVMB

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: ...BVMB FTS20BVMB FTKS35BVMB ATKS35BVMB FTK35BVMB ATK35BVMB FTS25BVMB FTS35BVMB Outdoor Unit RKS25BVMB ARKS25BVMB RK25BVMB ARK25BVMB RS20BVMB RKS35BVMB ARKS35BVMB RK35BVMB ARK35BVMB RS25BVMB RS35BVMB zHeat Pump Indoor Unit FTXS25BVMB ARXS25BVMB FTX25BVMB ATX25BVMB FTYS20BVMB FTXS35BVMB ARXS35BVMB FTX35BVMB ATX35BVMB FTYS25BVMB FTYS35BVMB Outdoor Unit RXS25BVMB ARXS25BVMB RX25BVMB ARX25BVMB RYS20BVMB ...

Page 3: ...nction 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 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 Controls at Mode Changing Start up 48 3 4 Discharge Pip...

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 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 Way Valve Abnormality 10...

Page 5: ...l 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 Plate and Reactor 166 2 7 Removal of Four Way Valve and Motor Valve 169 2 8 Removal of Compressor 172 Part 8 Others 175 1 Others 176 1 1 Explanation 176 1 2 Jumper Settings 177 Part 9 Appendix 179 1 Pipi...

Page 6: ...plug 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 equipment to conduct the repair or inspecting the circuits do not touch any electrically charged sections of the equipment If the refrigerant gas discharges during the repair work do not touch the dischargin...

Page 7: ...the 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 or fire When relocating the equipment make sure that the new installation site has sufficient strength to withstand the weight of the equipment If the installation site does not have sufficient streng...

Page 8: ...ice 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 and ranges When replacing the coin battery in the remote controller be sure to disposed of the old battery to prevent children from swallowing it If a child swallows the coin battery see a doctor imme...

Page 9: ...cal 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 drainage of the indoor unit after the repair Faulty drainage can cause the water to enter the room and wet the furniture and floor Icon Type of Information Description Note Note A note provides information...

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 Fan Speed Anticorrosion Treatment of Outdoor Heat Exchanger Indoor Unit Silent Operation Night Quiet Mode Automatic Flexibility Multi Split Split Type Compatible Indoor Unit Outdoor Unit Silent Operat...

Page 12: ...ft 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 Anticorrosion Treatment of Outdoor Heat Exchanger Indoor Unit Silent Operation Night Quiet Mode Automatic Flexibility Multi Split Split Type Compatible Indoor Unit Outdoor Unit Silent Operation Manual Intellig...

Page 13: ...lity 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 Outdoor Heat Exchanger Indoor Unit Silent Operation Night Quiet Mode Automatic Flexibility Multi Split Split Type Compatible Indoor Unit Outdoor Unit Silent Operation Manual Intelligent Eye Flexible Volt...

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 Fan Speed Anticorrosion Treatment of Outdoor Heat Exchanger Indoor Unit Silent Operation Night Quiet Mode Automatic Flexibility Multi Split Split Type Compatible Indoor Unit Outdoor Unit Silent Operat...

Page 15: ...t 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 Anticorrosion Treatment of Outdoor Heat Exchanger Indoor Unit Silent Operation Night Quiet Mode Automatic Flexibility Multi Split Split Type Compatible Indoor Unit Outdoor Unit Silent Operation Manual ...

Page 16: ...eliability 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 Outdoor Heat Exchanger Indoor Unit Silent Operation Night Quiet Mode Automatic Flexibility Multi Split Split Type Compatible Indoor Unit Outdoor Unit Silent Operation Manual Intelligent Eye Flexibl...

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: ...ard Right 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 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 273 784 195 273 784 195 Packaged Dimensions W D H mm 834 325 258 834 325 258 Weight kg 8 8 Gross Weight kg 11 11 ...

Page 20: ...rizontal 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 Microcomputer Control Microcomputer Control Dimensions H W D mm 273 784 185 273 784 185 Packaged Dimensions W D H mm 834 325 258 834 325 258 Weight kg 8 8 Gross Weight kg 11 11 Operation Sound H...

Page 21: ...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 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 273 784 195 273 784 195 Packaged Dimensions W D H mm 834 325 258 834 325 258 Weight kg 7 5 7 5 Gross Weight kg 11 11 Operation S...

Page 22: ...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 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 273 784 185 273 784 185 Packaged Dimensions W D H mm 834 325 258 834 325 258 Weight kg 7 5 7 5 Gross Weight kg 11 11 Operation S...

Page 23: ...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 Microcomputer Control Microcomputer Control Dimensions H W D mm 273 784 185 273 784 185 Packaged Dimensions W D H mm 834 325 258 834 325 258 Weight kg 7 5 7 5 Gross Weight kg 11 11 Operation Sound H M L dBA 38 32 26 39 33 27 Sound Power dBA H 54 ...

Page 24: ...ownward 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 Packaged Dimensions W D H mm 834 325 258 Weight kg 7 5 Gross Weight kg 11 Operation Sound H M L dBA 39 33 27 Sound Power dBA H 55 Outdoor Unit RS35BVMB Casing Color Ivory White Compressor Type Hermet...

Page 25: ...ight 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 Consumption Rated W 40 40 40 40 Power Factor 96 6 96 6 96 6 96 6 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 273 784 195 273 784 195 Packaged Dimensions W D H mm 834 ...

Page 26: ...ft 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 Rated W 40 40 40 40 Power Factor 96 6 96 6 96 6 96 6 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 273 784 185 273 784 185 Packaged Dimensions W D H mm 834 325 258...

Page 27: ...rol Right 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 Consumption Rated W 40 40 40 40 Power Factor 96 6 96 6 96 6 96 6 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 273 784 195 273 784 195 Packaged Dimensions W D H mm...

Page 28: ...rol Right 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 Consumption Rated W 40 40 40 40 Power Factor 96 6 96 6 96 6 96 6 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 273 784 185 273 784 185 Packaged Dimensions W D H mm...

Page 29: ...movable 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 Microcomputer Control Microcomputer Control Dimensions H W D mm 273 784 185 273 784 185 Packaged Dimensions W D H mm 834 325 258 834 325 258 Weight kg 7 5 7 5 Gross Weight kg 11 11 Operation Sound H M L ...

Page 30: ...and 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 mm 273 784 185 Packaged Dimensions W D H mm 834 325 258 Weight kg 7 5 Gross Weight kg 11 Operation Sound H M L dBA 39 33 27 39 33 27 Sound Power dBA H 55 Outdoor Units RYS35BVMB Casing Color Ivory...

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

Page 32: ...art 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 Printed Circuit Board Connector Wiring Diagram 24 1 1 Indoor Unit 24 1 2 Outdoor Unit 27 ...

Page 33: ...LED3 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 S26 Connector for signal receiver PCB 7 S32 Connector for room temp Heat exchanger thermistor 8 S35 Connector for Intelligent Eye Sensor PCB 1 V1 Varistor 2 JA ADDRESS SETTING JUMPER JB Fan speed setti...

Page 34: ...inted 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 Jumper JP21 Ground JP11 12V check Jumper JP12 JA JB JC R2507 ...

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: ...uit 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 Connector for four way valve coil Heat pump only 6 S90 Connector for thermistor PCB 1 FU1 FU2 S11 PCB 2 S30 S20 S90 S80 S70 S10 W 1P101935 1K V U ...

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 Controls at Mode Changing Start up 48 3 4 Discharge Pipe Control 49 3 5 Input Current Control 49 3 6 Freeze up Protection Control 50 3 7 Heating Peak cut Control 50 3 8 Fan Control 51 3 9 Moisture Pr...

Page 39: ...xplains 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...

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 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 58 60...

Page 41: ...esses 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 Angle Louvres The louvres made of elastic synthetic resin provide a wide range of airflow that guarantees a comfortable air distribution Auto Swing The following table explains the auto swing process f...

Page 42: ...te 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 for heating Automatic Air Flow Control for Cooling The following drawing explains the principle of fan speed control for cooling Step Cooling Heating Dry mode LLL Heating thermostat OFF 25 35kW clas...

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 Room temperature at startup Temperature ON point at which operation starts Frequency switching point Temperaturedifference for operation stop 24ºC Room temperature at startup 0 5ºC 1 5ºC 18ºC 18ºC 1 0ºC...

Page 44: ...ler 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 temperature Main unit setting temperature 2 5 deg Cooling Heating switching point Room temperature Main unit setting temperature 2 5 deg Thermostat ON OFF point is the same as the ON OFF point of cooling or ...

Page 45: ...ight 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 slightly in the case of heating for economical operations This prevents excessive heating in winter and excessive cooling in summer to ensure comfortable sleeping conditions and also conserves electricity...

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 C higher and Auto according to the operation mode at that time 1 In case of Fan mode the fan speed reduces by 50 rpm If the sensor detects the outputs 10 times sec or more it judges humans exist 1se...

Page 47: ...s 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 forty 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 48: ...ed 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 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 controller The indoor unit is operated according...

Page 49: ...period 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 dry operation Approx 2 C Heating H tap 90 rpm 30 C Fan H tap 90 rpm Automatic Same as cooling heating in Powerful operation The target is kept unchanged R2823 Target temp Fan 80rpm Set temp 18 C Power...

Page 50: ...otocatalytic Deodorizing Filter Photocatalytic Deodorizing Filter demonstrates powerful oxidation characteristics when subjected to harmless ultraviolet light Photocatalytic deodorizing power is recovered simply by exposing the filter to the sun for 6 hours once every 6 months 1 10 5 Air Purifying Filter A double structure made up of a bacteriostatic filter and an Air Purifying Filter traps dust m...

Page 51: ...SiBE04 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 Electrontic expansion valve Compressor R2826 ...

Page 52: ...es 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 Thermistor DCN 1 The indoor heat exchanger thermistor is used for controlling target discharge pipe temperature Set a target discharge pipe temperature according to the outdoor and indoor heat exchanger tempe...

Page 53: ...control 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 The discharge pipe thermistor is used for detecting the discharge thermistor disconnected C Indoor Heat Exchanger Thermistor DCN 1 The indoor heat exchanger thermistor is used for controlling target...

Page 54: ...d 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 Pump Down Operation Normal operating mode Cooling Heating Defrosting Stop mode except for cooling heating modes by indoor command Preheat operation During C capacitor is discharging Stop R2829 Air cond...

Page 55: ...reeze 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 compensation draft prevention pressure difference upkeep 4 Determine prohibited frequency There is a certain prohibited frequency such as a power supply frequency For Cooling Only Model 1 Determine command...

Page 56: ...frequency 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 When the D value is small lower the frequency When the D value is large increase the frequency 3 Limit of frequency variation width When the difference between input current and input current droopi...

Page 57: ...he 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 beginning of the operation as the four way valve is switched acquire the differential pressure required for activating the four way valve by having output the operating frequency which is more than a cert...

Page 58: ...r 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 rushes on the drooping zone without change In the unchanged zone the frequency limit will remain In the return reset zone the frequency limit will be cancelled Limitation of current drooping and stop valu...

Page 59: ...g 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 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...

Page 60: ...hich 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 function is adopted also for prevention of cold draught by securing the blown air temperature at the time of heating operation by low temperature out side air Processing 1 At the first step During op...

Page 61: ...ns 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 in cooling operation and outdoor air temperature is below 10 C FTK X S ATK X S series 0 C others Cooling FTK X S series ATK X S series FTK X series ATK X series FT Y S series Heating FTXS series ATX...

Page 62: ...utdoor 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 pass since the start of the operation or ending the defrosting Conditions for Canceling Defrost The judgment must be made with heat exchanger temperature 4 C 22 C Frequency Compressor Four way valve...

Page 63: ...ischarge 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 control when starting Control of target discharge pipe temperature Pressure equalizing control Open control when starting Control of target discharge pipe temperature Defrost control FD 1 Pressure e...

Page 64: ...e 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 disconnected open the electronic expansion valve according to the outdoor air temperature and the operating frequency and operate for a specified time and then stop After 3 minutes of waiting restart ...

Page 65: ...ift 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 opening so that the actual discharge pipe temperature become close to that temperature Indirect SH control using the discharge pipe temperature Determine a correction value of the electronic expansion valv...

Page 66: ...d 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 pulses more than the specified time it is considered as an insufficient gas With the conventional function a power consumption is weak comparing with that in the normal operation when gas is insufficien...

Page 67: ...ot 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 are met Starting adjustment If the forced operation switch is pressed as the above conditions are met 1 Command frequency 66 Hz 2 Electronic expansion valve opening Depending on the capacity of the ind...

Page 68: ...recautions 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 Operation 74 2 8 HOME LEAVE Operation 75 2 9 INTELLIGENT EYE Operation 77 2 10 TIMER Operation 79 2 11 Care and Cleaning 81 2 12 Trouble Shooting 84 ...

Page 69: ...ever 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 and handing ov...

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 leakage electric shocks or fire For installation consult the dealer or a qualified technician In order to avoid electric shock fire or injury if you detect any abnormally such as smell of fire stop the op...

Page 71: ...ure 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 slightly wet cloth Do not place things such as vessels containing water or anything else on top of the unit Water may pene trate into the unit and degrade electrical insulations resulting in an electric...

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: ...h 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 lamp green 14 TIMER lamp yellow page 20 15 HOME LEAVE lamp red page 16 16 Signal receiver It receives signals from the remote controller When the unit receives a signal you will hear a short beep Oper...

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 operation page 15 9 FAN setting button It selects the air flow rate setting 10 SWING button page 12 11 SENSOR button for INTELLIGENT EYE operation page 18 12 ON TIMER button page 21 13 OFF TIMER but...

Page 75: ...tteries 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 controller display begins to fade or if reception deteriorates please replace with new alkali batteries Using manganese batteries reduces the lifespan The attached batteries are provided for the initial use ...

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 controller Never expose the remote controller to direct sunlight Dust on the signal transmitter or receiver will reduce the sensitivity Wipe off dust with soft cloth Signal communication may be disabled if...

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 disable the system C TEMP ON OFF POWERFUL HOME LEAVE MODE TIMER FAN SWING SILENT SENSOR ON CANCEL OFF 1 3 2 Recommended temperature setting For cooling 26 C 28 C For heating 20 C 24 C Mode Operating condit...

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 lamp goes off To change the temperature setting 4 Press TEMPERATURE adjustment button DRY or FAN mode AUTO or COOL or HEAT mode The temperature setting is not variable Press to raise the temperature...

Page 79: ...om 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 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 DRY operation ...

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 position press SWING button once more The display will go blank The flaps will stop moving C TEMP ON OFF POWERFUL HOME LEAVE MODE TIMER FAN SWING SILENT SENSOR ON CANCEL OFF O N 1 2 ...

Page 81: ...ging 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 may be broken Be careful when adjusting the louvers Inside the air outlet a fan is rotating at a high speed In DRY mode or COOL mode In HEAT or FAN mode When stop operation Upper limit in cooling Lo...

Page 82: ...e 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 capacity of outdoor unit must be increased and the air flow rate be fixed to the maximum setting The temperature and air flow settings are not variable In DRY mode The temperature setting is lowered...

Page 83: ...ration 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 page 22 This function is available in COOL HEAT and AUTO modes This is not available in FAN and DRY mode POWERFUL operation and OUTDOOR UNIT SILENT operation cannot be used at the same time Priority i...

Page 84: ...ion 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 ler 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 leave operation will run with these settings the next t...

Page 85: ...ou 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 operation Set the unit to HOME LEAVE Opera tion before leaving the living room when going to bed The unit will maintain the temper ature in the room at a comfortable level while you sleep When you enter the...

Page 86: ...e 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 SILENT SENSOR ON CANCEL OFF 1 2 When somebody in the room Normal operation When nobody in the room 20 min after start energy saving operation Somebody back in the room Back to normal operation ...

Page 87: ...or 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 The sensor also mistakenly detects pets sunlight fluttering curtains and light reflected off of mirrors as passersby INTELLIGENT EYE operatipon will not go on during powerful operation Night set mode p...

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 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 remote controller batteries are replaced When operating the unit via t...

Page 89: ...ton 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 sample setting for combining the two timers is shown below ATTENTION In the following cases set the timer again After a breaker has turned OFF After a power failure After replacing batteries in the remo...

Page 90: ...tach 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 Check to see if the rotating axis in the upper center section is moving CAUTION Units Don t touch the metal parts of the indoor unit If you touch those parts this may cause an injury When removing o...

Page 91: ...me 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 approximately once every 3 months 1 Detach the filter element and attach a new one Insert with the green side up It is recommended to replace the air purifying filter every three months Photocatalytic ...

Page 92: ...ain 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 air 3 results in poor heating or cooling 4 may cause odour The air purifying filter and photocatalytic deodorizing filter cannot be reused even if washed In principle there is no need to replace the p...

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 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 fur...

Page 94: ...ere 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 the air conditioner with the remote controller 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 outdo...

Page 95: ...nditions 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 cleaning by the user For specialist maintenance contact the service shop where you bought the air conditioner The maintenance cost must be born by the user Call the service shop immediately After a pow...

Page 96: ...normality 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 Way Valve Abnormality 101 4 11 Discharge Pipe Temperature Control 103 4 12 Position Sensor Abnormality 104 4 13 CT or Related Abnormality 105 4 14 Thermistor or Related Abnormality Outdoor Unit 107 ...

Page 97: ...pment 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 Lamp Troubleshooting with the LED Indication The outdoor unit has one green LED LEDA on the PCB The flashing green LED indicates normal condition of microcomputer operation ON OFF Indicator lamps HOME L...

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 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 th...

Page 99: ...nuous 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 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 11 E7 21 UA 2 U4 12 C7 22 A...

Page 100: ...lity 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 Discharge pipe temperature control 103 F6 High pressure control in cooling 118 H6 Position sensor abnormality 104 H8 CT or related abnormality 105 H9 Outdoor air thermistor or related abnormality 10...

Page 101: ...ss 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 check note YES Is it normal NO Correct connections Replace PCBs R1400 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Model Type Connect...

Page 102: ...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 f...

Page 103: ...anger 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 Is it very dirty Does it conform to the thermistor characteristic chart NO Provide sufficient air passage Clean the air filter Clean the heat exchanger Replace the indoor unit PCB Replace the thermis...

Page 104: ...due 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 it at the rated voltage Is there conductivity NO Check the capacitor s conductivity Check the fan motor voltage immediately after re start Is it at the rated voltage Check the fan motor voltage NO N...

Page 105: ...an 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 Refer to P 122 C4 Heat exchanger temperature thermistor C9 Room temperature thermistor Check the connector connection YES Correct the connection Replace the thermistor Replace the indoor unit PCB Repla...

Page 106: ...nal 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 indoor unit outdoor unit connection wires YES YES Correct the indoor unit outdoor unit connection wires Diagnose the outdoor unit Replace the connection wires between the indoor and outdoor units Re...

Page 107: ...ubleshooting 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 valve itself or the coil Replace the four way valve coil or the valve itself Replace the outdoor unit PCB Refer to the refrigerant line check procedure Replace the outdoor unit PCB R2841 Caution Be ...

Page 108: ...inutes 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 Part No 1225477 Correct the power supply or replace the SPM Replace the outdoor unit PCB Replace the compressor Check the electronic expansion valve Replace it as required Replace the compressor R2842 ...

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 Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Input current flowing above its stop level NO YES Any LED off YES NO Check with the inverter c...

Page 110: ...cked 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 operation room temp indoor heat exchanger temp 10 C Heating indoor unit heat exchanger temp room temp 10 C Supposed Causes Connector in poor contact Thermistor defective Outdoor unit PCB defective Four way...

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 Malfunctioning l Insufficient gas l Water mixed l Stop valve defective Harness out of connector NO YES Disconnect the harness from the connector Resistance between harnesses about 3kΩ 0 5kΩ Malfunctioning Function...

Page 112: ...utdoor 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 120 Check No 6 Refer to P 122 Check No 11 Refer to P 125 FTK X S ATK X S series others 1 above 45Hz rising above 40Hz dropping 120 80 117 80 2 130 45Hz rising 25 40Hz dropping 110 70 117 80 3 below 30H...

Page 113: ...connected 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 Replace the outdoor unit PCB Replace the outdoor unit PCB Reconnect as specified Inverter checker Part No 1225477 Correct the power supply or replace the outdoor unit PCB Replace the compressor R3041 Cau...

Page 114: ...ision 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 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 bro...

Page 115: ...ion 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 Rising with increasing frequency Capacitor charged when the indoor unit or outdoor unit main relay turns on NO NO DC290 380V YES Voltage within the allowable range Supply voltage 15 YES NO Any LED off ...

Page 116: ...rature 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 condenser thermistor temperature Supposed Causes Connector in poor contact Thermistor defective Outdoor unit PCB defective Indoor unit PCB defective Condenser thermistor defective in the case of J3 error ou...

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 R2849 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Error displayed again on remote controller NO YES YES YES NO Indoor unit heat excha...

Page 118: ...king 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 below 113 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 defecti...

Page 119: ...tion 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 Check the outdoor unit fan or related Malfunctioning Radiation fin dirty Too dirty Functioning Thermistor as specified in its characteristic chart Above 122 C NO YES NO YES Check the radiation fin te...

Page 120: ...radiation 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 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...

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 connect or disconnect connector or parts damage may be occurred Error displayed again YES NO Slightly dirty Check No 9 Check the outdoor unit fan or related Malfunctioning Radiation fin dirty Too dirt...

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 Continuous run for about 5 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 123: ...have 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 YES NO Short circuit or breakage between compressor s coil phases NO YES Normal YES NO Any LED off Turn off the power and turn it on again to get the system started See if the same error occurs Turn o...

Page 124: ...essor 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 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 ...

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 Any thermistor disconnected YES Malfunctioning Malfunctioning NO Functioning Stop valve closed NO YES Check the CT YES NO Gas shortage error again Functioning Check No 6 Check the thermistors YES NO...

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 t have SPM replace the outdoor unit PCB Check the supply voltage Correct the power supply Check for such factors for a long term Replace the SPM Replace the outdoor unit PCB R2957 Caution Be sure to...

Page 127: ...eing 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 when the said temperature drops below 50 C Supposed Causes The installation space is not large enough Faulty outdoor unit fan Faulty electronic expansion valve Faulty defrost thermistor Faulty outdoo...

Page 128: ...r 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 installation location Clean the heat exchanger Check the installation space Check No 9 Outdoor fan check Judgment Check No 6 Heat exchanger thermistor check Judgment Check No 7 Installation conditio...

Page 129: ...ty 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 above step 2 the outdoor unit PCB is faulty 5 If the conductivity is confirmed in the above step 2 mount a good coil which generated latching sound in the EV unit that did not generate latching sound...

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 3kΩ 0 5kΩ NO S80 voltage at DC 180 220 V with compressor on Fig 1 Disconnect the four way valve coil from the connector and check the continuity Fig 1 Voltage at S80 DC180 220V ON Compressor Time ...

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 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 ...

Page 132: ...ger 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 allowable dimensions of the air suction and discharge area Is the air flow blocked by obstacles or winds blowing in the opposite direction R1438 Abnormal YES YES YES Does the discharged air from other outdoo...

Page 133: ...filter 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 leads 1 red black 2 white black Check the fan capacitor for continuity Does the outdoor fan rotate Does the outdoor unit fan start just after the power is turned on Check the outdoor fan system YES Y...

Page 134: ...veform 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 insufficient gas detection Conduct the check after operating the equipment for a sufficient length of time Correct the problem Conduct vacuum drying Replace the refrigerant Is the discharge thermister ...

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 and is approx 0 volt before checking power transistor Measuring method Disconnect the compressor harness connector from the outdoor unit PCB To disengage the connector press the protrusion on the conn...

Page 136: ...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 Æ faulty PCB Æ Replace the PCB Failure of 2 Æ faulty hall IC Æ Replace the fan motor Both 1 and 2 result Æ Replace the PCB MULTIMETER DC VOLTAGA RANGE DB1 TRM1 S90 THERMISTOR LEAD WIRE S80 FOUR WAY VALVE LEAD WIRE Heating Pump only S70 FAN MOTOR LEAD WIRE REACTOR LEAD WIRE COM...

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

Page 138: ...ard 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 Bell 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 ...

Page 139: ...al 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 panel with fingers and open front grille all the way 2 Lift center section of air filter and disengage hooks Remove air filter by pulling forward Left and right filters are interchangeable To re install ...

Page 140: ...t 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 the other hand And pull out the front panel forward to remove 2 Remove front panel from the unit Step Procedure Points ...

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: ...rning 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 screw Open service cover upward A switch for field setting is not provided in particular ...

Page 143: ...ipped 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 pushing the hook through a clearance between the front grille and the heat exchanger At the upper part there are two hooks in the left and the right Disengage the hooks by pressing knobs with a screwdrive...

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 Step Procedure Points ...

Page 145: ...after 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 equipped in the existing models are not provided 2 Disengage horizontal blade from blade retaining section 3 Bend blade slightly and remove it from the unit ...

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 Remove the blade forward Five vertical blades are integrated with the joint rod so only one blade can t be exchanged Step Procedure Points ...

Page 147: ...before 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 the retainer of the thermistor so that the retainer will not touch the harness same as the existing models 3 Disconnect one connector S6 of swing motor 4 Remove heat exchanger thermistor ...

Page 148: ...4 302 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 Points ...

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: ...2 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 switch box can be removed Step Procedure Points ...

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: ...1 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 Step Procedure Points Glass tabu fuse 3 15A 250V S7 Fan motor S6 Swing motor S32 Heat exchanger thermistor JC JB JA Address S21 HA terminal R2541 ...

Page 153: ...A 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 drain will not make a floor dirty In case that a drain hose is buried inside a wall remove it after the drain hose in the wall is pulled out 1 Remove the drain hose Make curing so that the residual dra...

Page 154: ...to 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 the left Lifting the heat exchanger slightly upward to the right the left hook comes to be disengaged easily Step Procedure Points ...

Page 155: ...2 146 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 Step Procedure Points ...

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 3 Insert the drain hose Push it into the inner part firmly 4 Push the drain plug into the right by Allen wrench Push it into the inner part firmly ...

Page 157: ...1 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 To remove right side panel remove three screws ...

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: ...oval 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 with Step Procedure Points ...

Page 161: ...an 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 operation switch on the main unit for five seconds The existing models can do it through the switch on the PC board just as well The layout of the connection ports for the flares has been changed to hori...

Page 162: ...d 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 plate and the bell mouth can be removed all at once When restoring the top plate move it horizontally and get it down for the easy work Step Procedure Points ...

Page 163: ...al 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 plate gets into this groove R1737 ...

Page 164: ...in 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 screws which are set below 2 Remove the two screws and undo the four hooks to release the bell mouth Slide the bell mouth in the arrow direction to disengage the hook B ...

Page 165: ...urn 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 avoid loosing or damaging it 1 Undo the five hooks and remove the shelter 2 Remove the PCB 1 Disconnect the ground wire ...

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 so that the mark z will be at upper part of the fan motor 1 Release the lead wires of the fan motor from the groove of the switch box 2 The propeller fan can be removed when the washer faced nut M8 is...

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

Page 173: ...ee 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 piping connection on the noise absorption pad is torn easily remove the pad carefully When restoring the noise absorption pad should pass the internal side of the piping 1 Untie the string fixing the no...

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 restoring the noise absorption pad should pass the internal side of the piping Step Procedure Points ...

Page 175: ...f Partition Plate and Reactor Procedure Warning Besuretoturnoffallpowersuppliesatleast10min beforedisassemblingwork Step Procedure Points 1 Remove the partition plate 1 Remove the two screws fixing the partition plate 2 Pull the partition plate upward to remove ...

Page 176: ...ing 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 reactor assembly to the bottom frame Step Procedure Points ...

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

Page 178: ...the 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 sure to fix the thermistor back on the original position when restoring Warning Ventilate when the refrigerant leaks during the work If the refrigerant is exposed to the fire it will cause toxic gas 3 R...

Page 179: ...ired 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 water so that the cloth will not be dried and avoid excessive heating It keeps below 120 C Be careful so as not to break pipes by pressing the pipes excessively by pliers when withdrawing the piping 5 Pr...

Page 180: ...per 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 motor valve and remove Cautions at the restoration Wrap the motor valve with wet cloth and make up water so that the cloth will not be dried and avoid excessive heating Caution Be careful about four w...

Page 181: ...ffallpowersuppliesatleast10min 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 the terminal cover and the lead wires of the compressor so as not to be burnt out by a gas brazing machine ...

Page 182: ...Unit 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 Step Procedure Points ...

Page 183: ...k 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 attention so that the fins of the heat exchanger will not be burnt Be sure to apply nitrogen s replacement when heating up the brazing part 1 Remove the brazing part on the discharge side of the compresso...

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

Page 185: ...cribed 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 the display to indicate that Trial Operation mode is selected 4 Trial run mode terminates in approx 15 minutes and switches into normal mode To quit a trial operation press ON OFF button After trial ...

Page 186: ...lectric 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 JB JC Metallic cover Sensor parts cover PCB Electric parts box Claws 4 points R2587 Jumper On indoor PC Board Function When connected factory set When cut JC Power failure recovery function Auto start...

Page 187: ...push 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 the sensor with a clean cloth being careful not to scratch the sensor Caution Do not hit or violently push the Intelligent eye sensor This can lead to damage and malfunction Do not place large object...

Page 188: ...02 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 Units 184 ...

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 HEAT EXCH THERMISTOR M INDOOR UNIT HEATING COOLING 7 0CuT 6 4CuT 9 5CuT HEAT EXCHANGER 6 4CuT 6 4CuT 4D033698A ...

Page 190: ...FFLER 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 DISCHARGE PIPE 7 9CuT 7 9CuT 7 9CuT PROPELLER FAN HEAT EXCHANGER M COMPRESSOR CAPILLARY TUBE 2 CAPILLARY TUBE 1 HEAT EXCHANGER THERMISTOR ACCUMLATOR OUTDOOR TEMPERETURE THERMISTOR 7 9CuT 9 5CuT REFRIGERANT...

Page 191: ...CuT 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 MUFFLER PROPELLER FAN HEAT EXCHANGER 7 9CuT M COMPRESSOR VALVE FOUR WAY ON COOLING 9 5CuT CAPILLARYTUBE 2 CAPILLARYTUBE 1 HEAT EXCHANGER THERMISTOR ACCUMLATOR THERMISTOR OUTDOOR TEMPERATURE 7 9CuT 9 5CuT 6...

Page 192: ...OR 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 2 3 1 3D033599A outdoor LED1 PCB2 H1P RECEIVER SIGNAL CONTROLLER LED2 H2P S1W REMOTE WIRELESS LED3 H3P R1T t S27 S26 S32 R2T t S21 PCB1 CENTRALIZED CONTROL FU FUSE C70 RUNNING CAPACITOR TERMINAL FOR...

Page 193: ...HT 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 NAMEPLATE FOR THE POWER REQUIREMENTS FIELD L LIVE X1M TERMINAL STRIP CT1 CURRENT TRANSFORMER L1 COIL PCB1 PRINTED CIRCUIT BOARD C12 C15 CAPACITOR L1R REACTOR M1C COMPRESSOR MOTOR M1F FAN MOTOR DB1 DB...

Page 194: ...GRY 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 FOR THE POWER REQUIREMENTS FIELD L LIVE X1M TERMINAL STRIP CT1 CURRENT TRANSFORMER L1 COIL PCB1 PRINTED CIRCUIT BOARD C12 C15 CAPACITOR L1R REACTOR M1C COMPRESSOR MOTOR M1F FAN MOTOR DB1 DB2 DIODE B...

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

Page 196: ...ault 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 Four Way Valve 169 Four Way Valve Abnormality 101 Four Way Valve Operation Compensation 48 Four Way Valve Performance Check 121 Four Way Valve Switching 48 Freeze up Protection Control 50 93 Frequency ...

Page 197: ...tor 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 Problem Symptoms and Measures 89 Programme Dry Function 34 Propeller Fan 162 R Radiation Fin Temperature Rise 111 Radiation fin thermistor 108 Reactor 166 Room temperature thermistor 96 S S1 24 138 S10 2...

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: ...essure 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 Insufficient Gas Control 57 Intelligent Eye 37 Inverter Features 31 Inverter Powerful Operation 40 Inverter Units Refrigerant System Check 125 L Location of Operation Lamp 88 M Main Structural Parts Co...

Page 201: ...8323 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 designs are subject to change without prior notice Printed in Japan 06 2003 AK COS ...

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