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Daikin ARXG25CVMB, Service Manual

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Daikin ARXG25CVMB Service Manual Download Page 143

Indoor Unit

Si04-402A

134

Removal Procedure

1.9

Removal of Electrical Box

Procedure

Warning

Be sure to wait 10 minutes or more after turning off all power supplies 
before disassembling work.

Step

Procedure

Points

„

Remove the front grille.

„

Discharge the static 
electricity from your body 
before touching the electrical 
parts like signal receiver 
PCB.
It may cause malfunction of 
PCB.

1. Remove the electrical 

box.

1

Loosen the screw of the 
earth.

2

Loosen the screw of the 
drip proof plate.

Summary of Contents for ARXG25CVMB

Page 1: ...Inverter Pair Wall Mounted Type C Series Applied Models z z z zInverter Pair Heat Pump Si04 402A ...

Page 2: ...air Inverter Pair C Series C Series C Series C Series zHeat Pump Indoor Unit FTXG25CVMAW FTXG35CVMAW FTXG25CVMAS FTXG35CVMAS FTXG25CVMBW FTXG35CVMBW FTXG25CVMBS FTXG35CVMBS ATXG25CVMB ATXG35CVMB Outdoor Unit RXG25CVMA RXG35CVMA RXG25CVMB RXG35CVMB ARXG25CVMB ARXG35CVMB ...

Page 3: ... Control for Indoor Units 20 1 5 Programme Dry Function 21 1 6 Automatic Operation 22 1 7 NIGHT SET Mode 23 1 8 INTELLIGENT EYE 24 1 9 Inverter Powerful Operation 25 1 10 Other Functions 26 2 Function of Thermistor 27 2 1 Heat Pump Model 27 3 Control Specification 28 3 1 Mode Hierarchy 28 3 2 Frequency Control 29 3 3 Controls at Mode Changing Start up 30 3 4 Discharge Pipe Control 32 3 5 Input Cur...

Page 4: ...DC Motor or Related Abnormality 77 4 5 Thermistor or Related Abnormality Indoor Unit 79 4 6 Front Panel Open Close Fault 80 4 7 Signal Transmission Error between Indoor and Outdoor Unit 81 4 8 Signal Transmission Error between Indoor Unit and Wired Remote Controller 82 4 9 Unspecified Voltage between Indoor and Outdoor Unit 83 4 10 Outdoor Unit PCB Abnormality 84 4 11 OL Activation Compressor Over...

Page 5: ...emoval of Electrical Box 134 1 10 Removal of PCB 140 1 11 Removal of Heat Exchanger 146 1 12 Removal of Fan Rotor and Fan Motor 149 2 Outdoor Unit 152 2 1 Removal of Panels and Fan Motor 152 2 2 Removal of Electrical Box 159 2 3 Removal of Reactor and Partition Plate 161 2 4 Removal of Sound Blanket 163 2 5 Removal of Four Way Valve 165 2 6 Removal of Compressor 167 2 7 Removal of PCB 169 Part 8 O...

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: ...lder in a well ventilated place Using the welder in an enclosed room can cause oxygen deficiency Warning Warning Be sure to use parts listed in the service parts list of 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 eq...

Page 8: ...gas leaks be sure to locate the leak and repair it before charging the refrigerant After charging refrigerant make sure that there is no refrigerant leak If the leak cannot be located and the repair work must be stopped be sure to perform pump down and close the service valve to prevent the refrigerant gas from leaking into the room The refrigerant gas itself is harmless but it can generate toxic ...

Page 9: ...g and repair it if the equipment is not properly grounded Improper grounding can cause an electrical 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 t...

Page 10: ...Si04 402A List of Functions 1 Part 1 Part 1 Part 1 Part 1 List of Functions List of Functions List of Functions List of Functions 1 List of Functions 2 ...

Page 11: ... Horizontal Auto Swing Right and Left Worry Free Reliability Durability Auto Restart after Power Failure 3 D Airflow Self Diagnosis Digital LED Display Comfort Airflow Mode Wiring Error Check 3 Step Airflow H P Only Anticorrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Indoor Unit Silent Operation Flexibility Multi Split Split Type Compatible Indoor Unit Night Quiet Mode...

Page 12: ...Si04 402A Specifications 3 Part 2 Part 2 Part 2 Part 2 Specifications Specifications Specifications Specifications 1 Specifications 4 ...

Page 13: ...ol 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 14 0 14 0 14 0 14 Power Consumption Rated W 30 30 30 30 Power Factor 93 2 93 2 93 2 93 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 275 840 150 275 840 150 Packaged Dimensions H W D mm ...

Page 14: ... 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 14 0 14 0 14 0 14 Power Consumption Rated W 30 30 30 30 Power Factor 93 2 93 2 93 2 93 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 275 840 150 275 840 150 Packaged Dimensions H W D mm 22...

Page 15: ...ht Left Horizontal and Downward Right Left Horizontal and Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 14 0 14 0 14 0 14 Power Consumption Rated W 30 30 30 30 Power Factor 93 2 93 2 93 2 93 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 275 840 150 275 840 150 Packaged Dimensions H W D mm 222 89...

Page 16: ...l 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 14 0 14 0 14 0 14 Power Consumption Rated W 30 30 30 30 Power Factor 93 2 93 2 93 2 93 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 275 840 150 275 840 150 Packaged Dimensions H W D mm 2...

Page 17: ...ft Horizontal and Downward Right Left Horizontal and Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 14 0 14 0 14 0 14 Power Consumption Rated W 30 30 30 30 Power Factor 93 2 93 2 93 2 93 2 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 275 840 150 275 840 150 Packaged Dimensions H W D mm 222 894 345...

Page 18: ...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 Printed Circuit Board Connector Wiring Diagram 10 1 1 Indoor Unit 10 1 2 Outdoor Unit 12 ...

Page 19: ...ontrol PCB 5 S41 Connector for swing motor 6 S46 Connector for signal receiver PCB 7 S47 Connector for control PCB 8 S49 Connector for reduction motor front panel mechanism 9 S51 Connector for front panel limit switch 1 V1 Varistor 2 JA Address setting jumper JB Fan speed setting when compressor is OFF on thermostat JC Power failure recovery function auto restart Refer to page 175 for detail 3 SW1...

Page 20: ...agram Printed Circuit Board Connector Wiring Diagram 11 PCB Detail PCB 1 Control PCB indoor unit PCB 2 Signal Receiver PCB PCB 3 INTELLIGENT EYE sensor PCB S21 V1 S46 FU1 S32 R3319 S1 S41 S51 JB JA JC S49 S36 LED4 RTH1 LED3 R3320 LED2 SW1 S47 S36 R3321 ...

Page 21: ... control PCB 3 S20 Connector for electronic expansion valve coil 4 S30 Connector for compressor motor 5 S40 Connector for overload protector 6 S70 Connector for fan motor 7 S80 Connector for four way valve coil 8 S90 Connector for thermistors outdoor air heat exchanger discharge pipe 9 HC3 HC4 HL3 HN3 Connector for filter PCB 1 FU1 FU2 Fuse 3 15A 2 FU3 Fuse 20A 3 LEDA Service monitor LED 4 V1 V2 V...

Page 22: ...onnector Wiring Diagram Printed Circuit Board Connector Wiring Diagram 13 PCB Detail PCB 1 Control PCB outdoor unit PCB 2 Filter PCB FU2 3 15A S30 HN3 HC3 S70 HC4 R3322 S40 LEDA S90 HL3 FU1 3 15A V1 S80 S20 S10 FU3 20A S11 R3323 V3 V2 ...

Page 23: ...Printed Circuit Board Connector Wiring Diagram Si04 402A 14 Printed Circuit Board Connector Wiring Diagram ...

Page 24: ...ET Mode 23 1 8 INTELLIGENT EYE 24 1 9 Inverter Powerful Operation 25 1 10 Other Functions 26 2 Function of Thermistor 27 2 1 Heat Pump Model 27 3 Control Specification 28 3 1 Mode Hierarchy 28 3 2 Frequency Control 29 3 3 Controls at Mode Changing Start up 30 3 4 Discharge Pipe Control 32 3 5 Input Current Control 32 3 6 Freeze up Protection Control 33 3 7 Heating Peak cut Control 33 3 8 Fan Contr...

Page 25: ...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 26: ... 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 40 60 120...

Page 27: ...fan Outline of 3 D Airflow Alternative repetition of vertical and horizontal swing motions enables uniform air conditioning of the entire room This function is effective for starting the air conditioner Detail of the Action When the horizontal swing and vertical swing are both set to auto mode the airflow become 3 D airflow and the horizontal swing and vertical swing motions are alternated The ord...

Page 28: ...a Control Flow Timing Chart Opening the front panel fully Start Running Output of the D signal after the front panel starts moving Making the fan rotate when the flap passes over the fan banned area Opening the flap fully R3311 TDELTA Fully close OFF Start ON Front panel Flap Under running control Under running control Under operation mode control Under operation mode control The outdoor unit prov...

Page 29: ...ring powerful operation fan operates H tap 50 70 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 class 830 ...

Page 30: ... temperature set by the microcomputer is divided into two zones Then the unit operates in the dry mode with an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level Room temperature at startup Temperature ON point at which operation starts Frequency switching point Temperaturedifference for operation stop 24ºC Room temperature at startup 1 0ºC 2 5ºC 18º...

Page 31: ...ote controller setting temperature plus correction value correction value 0 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 heating ope...

Page 32: ...T 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 Co...

Page 33: ...crocomputer 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 COOL DRY 2 C higher HEAT 2 C lower AUTO according to the operation mode at that time 1 In case of FAN mode the fan speed reduces by 60 rpm If the sensor detects the outputs 10 times sec or more it judges humans exist 1sec samp...

Page 34: ...ly the set temperature is shifted by 1 C 1 9 Inverter Powerful Operation Outline In order to exploit the cooling and heating capacity to full extent operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency Details of the Control When POWERFUL button is pushed in each operation mode the fan speed setting temperature will be converted to the following stat...

Page 35: ...stem operation there are times when the unit does not activate with this button 1 10 4 Titanium Apatite Photocatalytic Air Purifying Filter This filter combines the Air Purifying Filter and Titanium Apatite Photocatalytic Deodorizing Filter in a single highly effective unit The filter traps microscopic particles decompose odours and even deactivates bacteria and viruses It lasts for three years wi...

Page 36: ...mally 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 temperature C...

Page 37: ...For heat pump model There are following modes stop cooling includes drying heating include defrosting 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 comm...

Page 38: ...rced cooling 1 4 Indoor frequency command 2 Determine upper limit frequency Set a minimum value as an upper limit frequency among the frequency upper limits of the following functions Compressor protection input current discharge pipes peak cutting freeze up protection defrost 3 Determine lower limit frequency Set a maximum value as an lower limit frequency among the frequency lower limits of the ...

Page 39: ...the frequency 3 Frequency management when other controls are functioning When frequency is drooping Frequency management is carried out only when the frequency droops For limiting lower limit Frequency management is carried out only when the frequency rises 4 Upper and lower limit of frequency by PI control The frequency upper and lower limits are set depending on indoor unit When low noise comman...

Page 40: ...ency which is more than a certain fixed frequency for a certain fixed time Detail Starting Conditions 1 When starting compressor for heating 2 When the operating mode changes to cooling from heating 3 When starting compressor for rushing defrosting or resetting 4 When starting compressor for the first time after the reset with the power is ON 5 When starting compressor for heating next to the susp...

Page 41: ...zone the compressor 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 droo...

Page 42: ... 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 43: ... mode 8 Fan control in the powerful mode Detail Fan OFF Control when Stopped Fan OFF delay for 60 seconds must be made when the compressor is stopped 3 9 Liquid Compression Protection Function 2 Outline In order to obtain the dependability of the compressor the compressor must be stopped according to the conditions of the temperature of the outdoor air and outdoor heat exchanger Detail Operation s...

Page 44: ...outdoor 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 valv...

Page 45: ...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 46: ...isconnection 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 the unit a...

Page 47: ...ift 3 11 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 48: ...are three ways of control to detect insufficient gas I Detecting by power consumption If the power consumption is below the specified value and the frequency is higher than the specified frequency it is regarded as insufficient gas The power consumption is weak comparing with that in the normal operation when gas is insufficient and gas insufficiency is detected by checking a power consumption II ...

Page 49: ...oltage is detected each time equipment operation starts Cooling room temperature indoor heat exchanger temperature 4 0 C outdoor heat exchanger temperature outdoor temperature 4 0 C Heating indoor heat exchanger temperature room temperature 4 0 C outdoor temperature outdoor heat exchanger temperature 3 0 C Item Forced Cooling Forced operation allowing conditions 1 The outdoor unit is not abnormal ...

Page 50: ...guration 42 2 Instruction 43 2 1 Safety Precautions 43 2 2 Names of Parts 45 2 3 Preparation before Operation 48 2 4 AUTO DRY COOL HEAT FAN Operation 51 2 5 Adjusting the Air Flow Direction 53 2 6 POWERFUL Operation 55 2 7 OUTDOOR UNIT SILENT Operation 56 2 8 INTELLIGENT EYE Operation 57 2 9 TIMER Operation 59 2 10 Care and Cleaning 61 2 11 Troubleshooting 64 ...

Page 51: ...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 52: ...perly the refrigerant may be leaking so call your dealer When carrying 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...

Page 53: ...shocks Arrange the drain hose to ensure 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 ...

Page 54: ...Si04 402A Instruction System Configuration 45 2 2 Names of Parts 4 Indoor Unit 15 14 18 12 13 17 1 3 4 6 2 11 16 5 7 8 9 10 With the panel closed ...

Page 55: ...witch is useful when the remote controller is missing 13 Room temperature sensor It senses the air temperature around the unit 14 Operation lamp green 15 TIMER lamp yellow page 18 16 INTELLIGENT EYE lamp green page 16 17 INTELLIGENT EYE sensor It detects the movements of people and auto matically switches between normal operation and energy saving operation page 16 18 Signal receiver It receives s...

Page 56: ...F 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 Flap Horizontal blade 11 SWING button page 12 Louvers Vertical blades 12 COMFORT AIRFLOW mode but...

Page 57: ...eplace 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 of the system The usable perio...

Page 58: ... holder Turn on the power breaker Turning on the power breaker will cause the panel and flap to open once and then close again This is a normal procedure CAUTION ATTENTION During operation i e when the panel is open or being opened or closed do not touch the panel with your hands About remote controller Never expose the remote controller to direct sunlight Dust on the signal transmitter or receive...

Page 59: ...t is not operating If you are not going to use the air conditioner for a long period for example in spring or autumn turn the breaker OFF Use the air conditioner in the following conditions Operation outside this humidity or temperature range may cause a safety device to disable the system 1 3 2 Recommended temperature setting For cooling 26 C 28 C For heating 20 C 24 C Mode Operating conditions I...

Page 60: ...ssing of the button advances the mode setting in sequence AUTO DRY COOL HEAT FAN 2 Press ON OFF button The operation lamp will light up and the panel will open To stop operation 3 Press ON OFF button again The operation lamp will go off and the panel will close To change the temperature setting 4 Press TEMPERATURE adjustment button DRY or FAN mode AUTO or COOL or HEAT mode The temperature setting ...

Page 61: ...ll 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 The computer chip works to rid the...

Page 62: ...n press SWING button once more The flap will stop moving To adjust the vertical blades louvers 3 Press SWING button is displayed on the LCD 4 When the louvers have reached the desired position press the SWING button once more The louvers will stop moving To 3 D Airflow 1 3 Press the SWING button and the SWING button the and display will light up and the flap and louvers will move in turn To cancel...

Page 63: ...ing three dimensional airflow circulates cold air which tends to collected at the bottom of the room and hot air which tends to collect near the ceiling throughout the room preventing areas of cold and hot developing Comfort Airflow The air flow is set automatically The air direction is as shown in the figure at right ATTENTION Always use a remote controller to adjust the flap angle If you attempt...

Page 64: ... which are not available is displayed on the LCD 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 low...

Page 65: ...splayed on the LCD To cancel OUTDOOR UNIT SILENT operation 2 Press SILENT button again NOTE Note on OUTDOOR UNIT SILENT operation 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 is given to POWERFUL operation If operation is stopped using the remote control...

Page 66: ... 1 Press SENSOR button is displayed on the LCD To cancel the INTELLIGENT EYE operation 2 Press SENSOR button again EX When somebody in the room Normal operation The INTELLIGENT EYE lamp lights up When nobody in the room 20 min after start energy saving operation The INTELLIGENT EYE lamp goes off Somebody back in the room Back to normal operation The INTELLIGENT EYE lamp lights up 1 2 ...

Page 67: ...t location the speed of passersby temperature range etc The sensor also mistakenly detects pets sunlight fluttering curtains and light reflected off of mirrors as passersby INTELLIGENT EYE operation will not go on during powerful operation Night set mode page 18 will not go on during you use INTELLIGENT EYE operation Do not place large objects near the sensor Also keep heating units or humidifiers...

Page 68: ...etting by 10 minutes Holding down 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 repla...

Page 69: ...nutes Holding down either button 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 re...

Page 70: ...e after washing 4 Attach the top front panel Place the revolving axes on either side of the top front panel into the holes and slowly close Press either side of the top front panel CAUTION Units Don t touch the metal parts of the indoor unit If you touch those parts this may cause an injury When removing or attaching the top front panel use a robust and stable stool and watch your steps carefully ...

Page 71: ...eaner If the dust does not come 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 Titanium Apatite Photocatalytic Air Purifying Filter gray The Titanium Apatite Photocatalytic Air Purifying Filter can be renewed by washing it with water once every 6 months We recommend replacing it once e...

Page 72: ... the outlets of the indoor unit and the outdoor unit Check that the drain comes smoothly out of the drain hose during COOL or DRY operation If no drain water is seen water may be leaking from the indoor unit Stop operation and consult the service shop if this is the case Operation with dirty filters 1 cannot deodorize the air 2 cannot clean the air 3 results in poor heating or cooling 4 may cause ...

Page 73: ...m when the air conditioner is in defrost operation In COOL or DRY mode Moisture in the air condenses into water on the cool surface of outdoor unit piping and drips Mists come out of the indoor unit This happens when the air in the room is cooled into mist by the cold air flow during cooling operation The indoor unit gives out odour This happens when smells of the room furniture or cigarettes are ...

Page 74: ...ERATION lamp flashes Are the air filters clean Is there 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 An abnormal func...

Page 75: ...f 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 power failure The air co...

Page 76: ... and Outdoor Unit 81 4 8 Signal Transmission Error between Indoor Unit and Wired Remote Controller 82 4 9 Unspecified Voltage between Indoor and Outdoor Unit 83 4 10 Outdoor Unit PCB Abnormality 84 4 11 OL Activation Compressor Overload 85 4 12 Compressor Lock 86 4 13 DC Fan Lock 87 4 14 Input Over Current Detection 88 4 15 Four Way Valve Abnormality 89 4 16 Discharge Pipe Temperature Control 91 4...

Page 77: ...ipment 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 LED Indication The outdoor unit has one green LED LED A on the PCB The flashing green LED indicates normal condition of microcomputer operation Operation lamp green INTELLIGEN...

Page 78: ... for heat pump model and cooling operation cannot be used when the outside temperature is below 10 C Diagnosis with remote controller indication 73 Equipment operates but does not cool or does not heat only for heat pump model Check for wiring and piping errors in the indoor and outdoor units connection wires and pipes Conduct the wiring piping error check described on the product diagnosis namepl...

Page 79: ...duced 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 12 F6 23 A1 2 U4 13 C7 24 E1 3 L5 14 A3 25 U...

Page 80: ...k 2 Press the TEMP button Press TEMP or TEMP and change the digit until you hear the sound of beep or pi pi 3 Diagnose by the sound pi The number of tens does not accord with the error code pi pi The number of tens accords with the error code beep The both numbers of tens and units accord with the error code See 7 4 Enter the diagnosis mode again Press the MODE button The digit of the number of un...

Page 81: ...oth numbers of tens and units do not accord with the error code pi pi The number of tens accords with the error code beep The both numbers of tens and units accord with the error code 7 Determine the error code The digits indicated when you hear the beep sound are error code Error codes and description Refer to page 73 8 Exit from the diagnosis mode Press the MODE button R4088 R4089 ...

Page 82: ...Fan motor or related abnormality 77 C4 Heat exchanger thermistor abnormality 79 C7 Front panel open close fault 80 C9 Room temperature thermistor abnormality 79 Outdoor Unit E1 Outdoor unit PCB abnormality 84 E5 OL activation compressor overload 85 E6 Compressor lock 86 E7 DC fan lock 87 E8 Input over current detection 88 EA Four way valve abnormality 89 F3 Discharge pipe temperature control 91 F6...

Page 83: ...mately 10 continuous seconds Supposed Causes Faulty indoor unit PCB Faulty connector connection Faulty terminal strip of indoor unit 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 Mode...

Page 84: ...n according to the temperature detected by the indoor unit heat exchanger thermistor Malfunction Decision Conditions High pressure control During heating operations the temperature detected by the indoor heat exchanger thermistor is above 65 C Freeze up protection When the indoor unit heat exchanger temperature is below 0 C during cooling operation Supposed Causes Operation halt due to clogged air...

Page 85: ...mulation 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 thermistor replace the indoor unit PCB Caution Be sure to turn off power switch before connect or disconnect conn...

Page 86: ... used to determine abnormal fan motor operation Malfunction Decision Conditions When the detected rotation speed is less than 50 of the HH tap under maximum fan motor rotation demand Supposed Causes Operation halt due to short circuit inside the fan motor winding Operation halt due to breaking of wire inside the fan motor Operation halt due to breaking of the fan motor lead wires Detection error d...

Page 87: ...rate fan Turn off power supply and disconnect fan motor connector then turn power ON Check No 01 Check output of fan motor connector Is motor power voltage DC 200V generated Is motor control power voltage DC 15V generated Does it rotate Stop fan motor Is rotation number command pulse generated Check No 01 Check output of fan motor connector Is rotation number command voltage DC 1 6V generated Does...

Page 88: ...than 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 106 C4 Indoor heat exchanger thermistor C9 Room temperature thermistor Check the connector connection YES Correct the connection Replace the thermistor Replace the indoor unit PCB Replace ...

Page 89: ... the breaker off 2 Remove the decorative plate 3 Remove the slot in panel 4 Put the plug in or turn the breaker on Wait until the initialization finishes 5 Operate the unit by the indoor unit ON OFF switch Restart and check the movement YES YES YES YES Remove the front panel and check the movement Does it move Does it open close fully Restart Does the error code reappear Does it move NO NO NO NO R...

Page 90: ...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 109 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 Rep...

Page 91: ...mal Malfunction Decision Conditions When the data sent from the indoor unit cannot be received normally or when the content of the data is abnormal Supposed Causes Faulty remote controller cable Faulty remote controller Troubleshooting Check the indoor unit remote controller connection wires NO Replace the remote controller cable Replace the remote controller or the indoor PCB Is it normal R3314 Y...

Page 92: ...ision Conditions The separate type and multi type are interconnected Supposed Causes Wrong models interconnected Wrong indoor unit PCB mounted Indoor unit PCB defective Wrong outdoor unit PCB mounted or defective Troubleshooting Check the indoor and outdoor unit model names Match the compatible models Replace the indoor unit PCB or the outdoor unit PCB R3315 Caution Be sure to turn off power switc...

Page 93: ...o an external factor Noise Momentary voltage drop Momentary power failure etc Unidentified information of the outdoor unit Damage of the EEPROM Faulty outdoor unit PCB Troubleshooting Turn on the power again Check the grounding YES YES Replace the outdoor unit PCB The electronic expansion valve is unidentified Replace the outdoor unit PCB Provide proper grounding The malfunction may be caused by a...

Page 94: ...ubleshooting Check No 4 Refer to P 104 Check No 5 Refer to P 105 Check No 6 Refer to P 106 Check No 11 Refer to P 109 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 95: ...pposed Causes Compressor locked Compressor harness disconnected 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 c...

Page 96: ...n for about 5 minutes normal Supposed Causes Fan motor breakdown Harness or connector disconnected between fan motor and PCB or in poor contact Foreign matters stuck in the fan Troubleshooting Check No 15 Refer to P 110 Turn off the power and reconnect the connector Remove Replace the outdoor unit fan motor Replace the outdoor unit PCB R2843 Caution Be sure to turn off power switch before connect ...

Page 97: ...ave 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 checker Turn off ...

Page 98: ...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 5 C Heating indoor unit heat exchanger temp room temp 5 C Supposed Causes Connector in poor contact Thermistor defective Outdoor unit PCB defective Four way v...

Page 99: ...wer 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 Functioni...

Page 100: ...er or outdoor 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 104 Check No 6 Refer to P 106 Check No 11 Refer to P 109 Stop temperatures 1 above 45Hz rising above 40Hz dropping 110 97 2 30 45Hz rising 25 40Hz dropping 105 92 3 below 30Hz rising below 25Hz ...

Page 101: ...g 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 65 C The error is cleared when the temperature drops below 54 C Supposed Causes The installation space is not large enough Faulty outdoor unit fan Faulty electronic expansion valve Faulty defrost thermistor Faulty outdo...

Page 102: ... 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 condition...

Page 103: ...ue of direct current before the compressor starts up is not within 0 5 4 5V Sensor output is converted into voltage When the value of direct voltage before the compressor starts up is under 50V Supposed Causes Faulty outdoor unit PCB Broken harness or imperfect connection Troubleshooting Check the harness YES Exchange the harness Replace the PCB Broken R4001 NO Caution Be sure to turn off power sw...

Page 104: ... disconnected Compressor itself defective Outdoor unit PCB defective Stop valve closed Input voltage out of specification Troubleshooting Check No 13 Refer to P 110 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 Caution Be sure to turn off power s...

Page 105: ...ision Conditions The compressor running frequency is below 52 Hz 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 Outdoor unit PCB defective Troubleshooting Replace the outdoor unit PCB Cautio...

Page 106: ...ture 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 outd...

Page 107: ...oor air thermistor Replace the following thermistor l Indoor heat exchanger thermistor Replace the outdoor unit PCB Replace the indoor unit PCB R4093 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 heat exchanger thermistor functioning NO Connector or thermistor disco...

Page 108: ...s 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 255 times Clearing condition Continuous run for about 10 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 109: ...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 110: ...lues 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 time total time Gas shortage detection III When the difference of the temperature is smaller than it is regarded as insuf...

Page 111: ...it heat exchanger thermistor 1 Replace the PCB 2 Replace the compressor Procedure complete R3318 Caution Be sure to turn off power switch before connect or disconnect connector or parts damage may be occurred Any thermistor disconnected YES Malfunctioning NO Stop valve closed NO YES YES NO Gas shortage error again Functioning Check No 6 Check the thermistors YES NO Oil oozing at internal piping NO...

Page 112: ...n Continuous run for about 10 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 t...

Page 113: ...ct that connector and check the conductivity 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...

Page 114: ...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 115: ...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 116: ...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 117: ...p valve Replace the pipe installed at the site Clean Replace the compressor R1443 YES YES YES NO NO NO NO At the heat exchanger and air filter dirty Is the stop valve open Is the connection pipe deformed YES High Check the outdoor unit fan system Reconnect R2857 Outdoor unit fan running YES Fan motor lead wire connector disconnected YES NO NO Outdoor unit fan system functioning Go to Check No 15 ...

Page 118: ...veform disturbance near the zero cross sections circled in Fig 2 5 1 9 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 119: ... off and disconnect the connector S70 2 Make sure there is about DC 270 V between pins 4 and 7 3 With the system and the power still off reconnect the connector S70 4 Make a turn of the fan motor with a hand and make sure the pulse 0 15 V appears twice at pins 1 and 4 If the fuse is blown out the outdoor unit fan may also be in trouble Check the fan too If the voltage in Step 2 is not applied it m...

Page 120: ...lade 125 1 6 Removal of Reduction Motor 126 1 7 Removal of Outlet Grille 129 1 8 Removal of Vertical Blades and Swing Motor 130 1 9 Removal of Electrical Box 134 1 10 Removal of PCB 140 1 11 Removal of Heat Exchanger 146 1 12 Removal of Fan Rotor and Fan Motor 149 2 Outdoor Unit 152 2 1 Removal of Panels and Fan Motor 152 2 2 Removal of Electrical Box 159 2 3 Removal of Reactor and Partition Plate...

Page 121: ...wer supplies before disassembling work Step Procedure Points 1 Features When the signal receiver catches a signal from the remote controller it produces beep sound and the operation lamp blinks 2 Remove the air filters 1 Hold the front panel by the tabs on the both sides and lift it until it stops with a click 2 Keep the front panel open with the support plate ...

Page 122: ...hen installing When installing insert 2 hooks of the air filter completely 3 Remove the air purifying filter The right and left air purifying filters are interchangeable 1 Titanium Apatite Photo catalytic Air purifying Filter is fixed on the rear of the air filter 2 Bend the air filter to release the protrusions and remove the Titanium Apatite Photocatalytic Air Purifying filter Step Procedure Poi...

Page 123: ... closed Slide the front panel side to side to release each axis Align the right and left axes with grooves in turn and insert them to the end when installing 1 Open the front panel to the horizontal position Release the both sides pivots and remove the front panel 2 Remove the decorative plate The decorative plate has hooks 3 for each side on the back side 1 Lift and pull out the decorative plate ...

Page 124: ...late Caution Fit the hooks securely or the slot in panel gets caught in the decorative plate and the mechanism may break down 3 Lift and remove the slot in panel 4 When reassembling fit the axes of the slot in panel from above 5 Push the lower part of the slot in panel and attach to the running gear Step Procedure Points Hooks R3770 Hook Decorative plate R3771 ...

Page 125: ... the service cover inside and release the hooks 2 The service cover has 2 hooks on the right side and 4 hooks on the lower side When reassembling fit the right side hooks and insert the lower hooks while bending the service cover 3 Loosen the screw on the service cover of electrical box Step Procedure Points ...

Page 126: ...nit Removal Procedure 117 4 Pull down and remove the service cover of electrical box 5 Loosen the screw on the fixing plate 6 Push the white section on the terminal board and release the relay wires Step Procedure Points ...

Page 127: ...4 Remove the front grille The front grille has no screw inside flaps 1 Loosen the 5 screws 2 The front grille has 3 hooks on the upper side Step Procedure Points B section B section A section A section C section R3783 R3784 R3786 R3785 C section ...

Page 128: ...reful not to cut your finger by the fins of the heat exchanger As for the horizontal blades fully opened position is easy to reassemble and remove 4 Release the both sides hooks 5 Pull the front grille out horizontally andremove it When reassembling install the front grille horizontally so as not to stuff the flap inside Step Procedure Points ...

Page 129: ... supplies before disassembling work Step Procedure Points Remove the front grille 1 Remove the assembly of front panel mechanism 1 The back of the front grilles 2 Loosen the 2 screws of the assembly left 3 Remove the assembly When reassembling insert the lower rack plate first 4 Lift the shaft and pull it out to the rightward Pay attention so as not to lose the drive gear ...

Page 130: ...it Removal Procedure 121 5 Loosen the 2 screws of the assembly right 6 Remove the assembly When reassembling insert the lower rack plate first The assembly has marks for right or left R Right L Left Step Procedure Points ...

Page 131: ...te 1 Loosen the 2 screws of the left assembly cover 2 Hold the assembly hori zontally and release the hook When you demand small parts like cogs and rollers order a set of assembly Pay attention so as not to lose the rollers 3 Remove the running gear Step Procedure Points ...

Page 132: ...2of the center cog 5 Loosen the 2 screws of the right assembly cover 6 Hold the assembly hori zontally and release the hook When you demand small parts like cogs and rollers order a set of assembly Pay attention so as not to lose the rollers The point for reassembling is the same as for the left Step Procedure Points ...

Page 133: ...edure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points Remove the front grille 1 Remove the lamp cover 1 Release the 2 hooks carefully 2 Release the 3 hooks while rotating the lamp cover and remove ...

Page 134: ...assembling work Step Procedure Points 1 Remove the horizontal blade The horizontal blade is single Installation procedure 1 Since key pattern hook is provided rotate the blade and fit it to the left pivot first 2 Fit the blade to the right pivot 3 Fit the blade to the center pivot 1 Release the center pivot 2 Bend the horizontal blade slightly and remove it R3816 R3813 R3814 ...

Page 135: ...otor Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points Remove the front grille 1 Remove the assembly of reduction motor 1 Loosen the screw 2 Release the 2 hooks and remove the assembly ...

Page 136: ...Si04 402A Indoor Unit Removal Procedure 127 2 Remove the reduction motor 1 Release the hook and open the assembly 2 Layout of the harness of the motor Step Procedure Points ...

Page 137: ...Indoor Unit Si04 402A 128 Removal Procedure 3 Remove the cog large 4 Lift and remove the reduction motor 5 Pull and disconnect the connector for the motor Step Procedure Points ...

Page 138: ...p Procedure Points Remove the front grille Remove the assembly of the reduction motor 1 Remove the outlet grille 1 Insert your finger into the hole and push up the hook to release it The outlet grille has 4 holes 2 Lift up the lower part of the grille to release the hook on the upper backside 3 Rotate the upper part of the grille to release the hook on the lower back side Pull out the grille ...

Page 139: ...ning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points Remove the assembly of the outlet grille 1 Remove the vertical blades 1 Release the 4 hooks and remove the thermal insulation 2 Release the 4 hooks and remove the thermal insulation ...

Page 140: ...e interlock rod from the vertical blades 4 Pull out the interlock rod from the swing motor side You cannot dismantle the caulking section 5 Push the hooks on the back of the vertical blades and remove One piece has 5 blades Step Procedure Points R3834 R3835 ...

Page 141: ...oor Unit Si04 402A 132 Removal Procedure 2 Remove the swing motor 1 Disconnect the connector for the swing motor 2 Loosen the screw and remove the swing motor 3 Strip the fixing tape Step Procedure Points ...

Page 142: ...Si04 402A Indoor Unit Removal Procedure 133 4 Loosen the screw and pull out the swing motor 5 Disconnect the connector for the swing motor Step Procedure Points ...

Page 143: ...g off all power supplies before disassembling work Step Procedure Points Remove the front grille Discharge the static electricity from your body before touching the electrical parts like signal receiver PCB It may cause malfunction of PCB 1 Remove the electrical box 1 Loosen the screw of the earth 2 Loosen the screw of the drip proof plate ...

Page 144: ...p proof plate When reassembling insert the left hook of the drip proof plate into the hem plate of the heat exchanger 4 Twist the electrical box cover to the right slightly to release the lower hook Lift up and open the cover 5 Layout of the wiring Step Procedure Points ...

Page 145: ...7 Disconnect the connector for the swing motors for horizontal and vertical blades S41 The harnesses for the horizontal swing motor and the vertical swing motor are united 8 Release the harness from the hook 9 Disconnect the connector for the fan motor S1 Step Procedure Points ...

Page 146: ...lease the harness from the hook 11 Disconnect the connector for the reduction motor front panel mechanism S49 12 Release the harness from the hook 13 Release the heat exchanger thermistor Pay attention so as not to lose the clip Step Procedure Points ...

Page 147: ... the thermistor lead wire from the hook When reassembling hang the excessive lead wire of the heat exchanger thermistor on the hook 15 Layout of the lead wire for the heat exchanger thermistor 16 Loosen the screw of the electrical box Step Procedure Points ...

Page 148: ... Removal Procedure 139 17 Tilt the front part of the electrical box to the right slightly and pull it out When reassembling push the electrical box upright and make sure to fit the hook on the backside Step Procedure Points ...

Page 149: ...arning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points Remove the electrical box 1 Remove the control PCB 1 Lift up the cover of the electrical box and open it 2 Release the right hook and remove the cover ...

Page 150: ...Si04 402A Indoor Unit Removal Procedure 141 3 Loosen the screws of the earth 4 Release the front hook and the 2 upper hooks and remove the shelter Step Procedure Points ...

Page 151: ...Indoor Unit Si04 402A 142 Removal Procedure 5 Layout of the wiring 6 Loosen the screw and pull out the terminal board Step Procedure Points ...

Page 152: ...rminals from the board Pb free soldering is adopted for PCB When replacing PCB use the particular solder and iron Black 1 White 2 Red 3 9 Cut the clamps Clamps should be used all the time Fix it as it was before 10 Disconnect the connector for the signal receiver PCB S46 Step Procedure Points ...

Page 153: ...Indoor Unit Si04 402A 144 Removal Procedure 11 Release the hooks and draw out the harness from the ditch 12 Loosen the 2 screws and remove the PCB 13 Control PCB Step Procedure Points ...

Page 154: ...Removal Procedure 145 2 Remove the signal receiver PCB 1 Release the hook with a flat screwdriver 2 Release the hook and remove the receiver unit 3 Release the 2 hooks and remove the signal receiver PCB Step Procedure Points ...

Page 155: ...d refrigerant R410A into refrigerant cycle Contaminating of air or other gas causes abnormal high pressure in refrigerating cycle and this results in pipe breakage or personal injuries Pay attention so that the residual water in the drain will not make the floor wet In case that a drain hose is buried inside a wall remove it after the drain hose in the wall is pulled out Use two wrenches to discon...

Page 156: ...Procedure 147 3 Remove the piping fixture plate 1 Release the 2 hooks with a flat screwdriver from the front side 2 Release the hook from the back side Lift up the lower part of the fixture plate and remove it Step Procedure Points ...

Page 157: ...the 2 screws on the left 3 Push the fixing hook on the right side and lift the heat exchanger Caution When removing or reinstalling heat exchanger be sure to wear protective gloves or wrap the heat exchanger with cloths Fins can cut fingers 4 Pull the heat exchanger to the front side and then lift and remove it Step Procedure Points ...

Page 158: ...edure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the right side plate 1 Loosen the 2 screws 2 Remove the right side plate 2 Remove the motor cover 1 Loosen the 2 screws and remove the motor cover ...

Page 159: ...Indoor Unit Si04 402A 150 Removal Procedure 3 Remove the bearing 1 Lift up the right part of the fan rotor and motor and slide them to the rightward to remove Step Procedure Points ...

Page 160: ...ndoor Unit Removal Procedure 151 2 Hold the lower outside of the bearing Push it inwards and lift to release the hook 4 Remove the fan motor 1 Loosen the fixing screw and remove the fan motor Step Procedure Points ...

Page 161: ...re after turning off all power supplies before disassembling work Step Procedure Points 1 Features Take care not to cut your finger by the fins of the heat exchanger The stop valve cover is united with the shelter When reassembling make sure to fit the 5 hooks 1 Loosen the screw of the stop valve cover Pull down the stop valve cover and remove it ...

Page 162: ...the panels 1 Loosen the 3 screws front right left and lift the top panel 2 Remove the drip proof plate 3 Disconnect the connector for fan motor S70 The fan motor is united with the front panel 4 Loosen the 5 screws of the front panel Step Procedure Points ...

Page 163: ... 4 hooks The fan motor is united with the front panel 3 Remove the fan motor The screw has reverse winding 1 Unscrew the washer fitted nut M10 of the propeller fan with a spanner 2 Remove the propeller fan Align mark of the propeller fan with D cut section of the motor shaft when reassembling Step Procedure Points ...

Page 164: ...t the bell mouth to undo the hooks Remove the bell mouth 4 Loosen the fixing hooks and release the lead wire Put the lead wire through the back of the motor when reassembling so as not to be entangled with the propeller fan Step Procedure Points R3249 Lead wire Propeller fan ...

Page 165: ...Outdoor Unit Si04 402A 156 Removal Procedure 5 Loosen the 4 screws to remove the fan motor M4 16 DC fan motor 6 Loosen the 2 screws to remove the fan motor fixing frame Step Procedure Points ...

Page 166: ...r Unit Removal Procedure 157 4 Remove the right side panel 1 Loosen the 2 screws on the rear side 2 Loosen the 3 screws on the right side 3 Loosen the screw and lift the connection port to remove Step Procedure Points ...

Page 167: ...Outdoor Unit Si04 402A 158 Removal Procedure When reassembling make sure to fit the hook Step Procedure Points ...

Page 168: ...lies before disassembling work Step Procedure Points Remove the top panel Disconnect the connector for fan motor 1 Remove the electrical box 1 Disconnect the 2 reactor harnesses 2 Disconnect the relay connector for compressor lead wire 3 Disconnect the connector for four way valve S80 When reassembling coil the excessive lead wire and hang the loop on the hook ...

Page 169: ...edure 4 Release the discharge pipe thermistor Pay attention so as not to lose the clip for thermistor 5 Release the heat exchanger thermistor Pay attention so as not to lose the clip 6 Lift and remove the electrical box Step Procedure Points ...

Page 170: ...e Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points Remove the outer panels Remove the electrical box 1 Remove the reactor 1 Loosen the screw Lift and remove the reactor 2 Remove the partition plate 1 Loosen the 2 screws ...

Page 171: ...nit Si04 402A 162 Removal Procedure 2 The partition plate has a hook on the lower side Lift and pull the partition plate to remove When reassembling fit the lower hook into the bottom frame Step Procedure Points ...

Page 172: ...ies before disassembling work Step Procedure Points Remove the outer panels Remove the electrical box 1 Remove the sound blanket 1 Untie the strings and open the sound blanket 2 Lift and remove the sound blanket body as it is opened Since the piping ports on the sound blanket are torn easily remove the blanket carefully 3 Lift and remove the sound blanket top ...

Page 173: ... Si04 402A 164 Removal Procedure 4 Pull the sound blanket inner out Since the piping ports on the sound blanket are torn easily remove the blanket carefully 5 Pull the sound blanket bottom out Step Procedure Points ...

Page 174: ... turning off all power supplies before disassembling work Step Procedure Points 1 Remove the peripheries Remove the four way valve and the sheets of putty so as not to burn them 1 Remove the terminal cover Be careful so as not to burn the compressor terminals or the name plate Make a note 2 Loosen the screw of the four way valve coil ...

Page 175: ...a tube cutter 4 Heat up the brazed part and withdraw the piping with pliers Provide a protective sheet or a steel plate so that the brazing flame cannot influence peripheries Be careful so as not to break the pipes by pressing it excessively by pliers when withdrawing it Step Procedure Points ...

Page 176: ...o burn the heat exchanger fin Warning Since it may happen that refrigeration oil in the compressor will catch fire prepare wet cloth so as to extinguish fire immediately In case of the difficulty with gas brazing machine 1 Disconnect the brazed part where is easy to disconnect and restore 2 Cut pipes on the main unit by a miniature copper tube cutter in order to make it easy to disconnect Cautions...

Page 177: ...Outdoor Unit Si04 402A 168 Removal Procedure Step Procedure Points 3 Heat up the brazed part of the suction side and disconnect 4 Lift the compressor up and remove it ...

Page 178: ...ing off all power supplies before disassembling work Step Procedure Points 1 Remove the PCB You can remove the PCB when you disconnect the read wires on the terminal board without removing the electrical box PbF Pb free brazing is adopted 1 Feature of the PCB 2 Loosen the screw on the terminal board 3 Release the earth terminal ...

Page 179: ...Outdoor Unit Si04 402A 170 Removal Procedure 4 Loosen the 4 screws 5 Undo the 3 hooks on the upper side 6 Lift and pull out the PCB Step Procedure Points ...

Page 180: ...Si04 402A Outdoor Unit Removal Procedure 171 7 Feature of the PCB S70 fan motor S80 four way valve S90 thermistor outdoor air heat exchanger discharge pipe Step Procedure Points ...

Page 181: ...Outdoor Unit Si04 402A 172 Removal Procedure ...

Page 182: ...Si04 402A Others 173 Part 8 Part 8 Part 8 Part 8 Others Others Others Others 1 Others 174 1 1 Test Run from the Remote Controller 174 1 2 Jumper Settings 175 ...

Page 183: ...g 1 Measure the supply voltage and make sure that it falls in the specified range 2 Trial operation should be carried out in either cooling or heating mode 3 Carry out the test operation in accordance with the Operation Manual to ensure that all functions and parts such as louver movement are working properly The air conditioner requires a small amount of power in its standby mode If the system is...

Page 184: ...e the drip proof plate 4 tabs 4 Cut the address jumper JA on the control PCB Wireless remote controller 1 Slide the front cover and take it off 2 Cut the address jumper J4 1 2 2 Jumper Setting R2871 R2872 Jumper On indoor control PCB Function When connected factory set When cut JC Power failure recovery function Auto restart Unit does not resume operation after recovering from a power failure Time...

Page 185: ...Others Si04 402A 176 Others ...

Page 186: ...Si04 402A Appendix 177 Part 9 Part 9 Part 9 Part 9 Appendix Appendix Appendix Appendix 1 Piping Diagrams 178 2 Wiring Diagrams 179 ...

Page 187: ... EXCHANGER 7 0CuT 7 0CuT 4D045301A 9 5CuT 9 5CuT 7 0CuT 7 0CuT THERMISTOR DISCHARGE PIPE OUTDOOR UNIT MUFFLER PROPELLER FAN 7 9CuT 7 9CuT M COMPRESSOR VALVE FOUR WAY ON HEATING 9 5CuT 4 8CuT 4 8CuT THERMISTOR 9 5CuT ACCUMULATOR MUFFLER FILTER WITH THERMISTOR 6 4CuT 9 5CuT 6 4CuT FILTER VALVE MOTOR OPERATED MUFFLER FILTER MUFFLER WITH 9 5CuT 6 4CuT VALVE LIQUID STOP VALVE FIELD PIPING FIELD PIPING ...

Page 188: ...4813B 1 outdoor NOTE N MRCW MRM10 MRM20 MAGNETIC RELAY L 1 REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS indoor L LIVE IPM1 INTELLIGENT POWER MODULE L1 COIL L1R REACTOR M1C COMPRESSOR MOTOR M1F FAN MOTOR C74 C75 IC11 TRIAC DB1 DB2 DIODE BRIDGE FU1 FU2 FU3 FUSE C94 C95 C100 CAPACITOR 3 2 1 FIELD WIRING L N X1M 2 3 1 RED BLK WHT GRN YLW Z2C GRN YLW HN1 HL1 E S FU3 20A V2 PCB1 V3 N NEUTRAL SA1 Q1...

Page 189: ...Wiring Diagrams Si04 402A 180 Appendix ...

Page 190: ...resistance check 106 turning speed pulse input on the outdoor unit PCB check 110 comfort airflow mode 18 compressor 167 compressor lock 86 compressor overload 85 compressor protection function 31 connectors 10 12 connectors fan motor 136 153 four way valve 159 reduction motor 137 signal receiver PCB 143 swing motors 136 control PCB indoor unit 11 74 control PCB outdoor unit 13 144 169 cover lamp c...

Page 191: ...fault 80 FU1 10 12 FU2 12 FU3 12 functions list of 2 fuse 10 12 G grille front grille 118 outlet grille 129 H H0 94 H6 95 H8 96 H9 97 HA 10 Hall IC 20 77 HC3 12 HC4 12 heat exchanger 148 heat exchanger thermistor 27 79 98 137 160 heating peak cut control 33 high pressure control 75 high pressure control in cooling 92 HL3 12 HN3 12 horizontal blade 125 hot start function 26 I indoor unit PCB abnorm...

Page 192: ...eiver PCB 11 145 problem symptoms and measures 69 programme dry function 21 propeller fan 154 R rack plate 120 reactor 161 reactor harnesses 159 reduction motor 10 80 126 reduction motor connector 137 remote controller 70 right side panel 157 right side plate 149 room temperature thermistor 79 RTH1 10 S S1 10 136 S10 12 S11 12 S20 12 S21 10 S30 12 S32 10 S36 10 S40 12 S41 10 136 S46 10 143 S47 10 ...

Page 193: ...3 troubleshooting 64 73 troubleshooting with led indication 68 turning speed pulse input on the outdoor unit PCB check 110 U U0 101 U2 103 U4 81 U5 82 UA 83 unspecified voltage 83 V V1 10 12 V2 12 V3 12 varistor 10 12 vertical blades 130 voltage detection function 40 W wide angle louvres 18 wiring diagrams 179 ...

Page 194: ...urrent detection 88 installation condition check 107 insufficient gas 101 insufficient gas control 39 INTELLIGENT EYE 24 INTELLIGENT EYE sensor PCB 11 inverter features 17 inverter powerful operation 25 inverter units refrigerant system check 109 J jumper settings 175 M mode hierarchy 28 N night set mode 23 O OL activation compressor overload 85 ON OFF button on indoor unit 26 operation lamp locat...

Page 195: ...low Charts turning speed pulse input on the outdoor unit PCB check 110 U unspecified voltage 83 W wiring diagrams ARXG25 35CVMB 179 ATXG25 35CVMB 179 FTXG25 35CVMAW S 179 FTXG25 35CVMBW S 179 RXG25 35CVMA 179 RXG25 35CVMB 179 ...

Page 196: ...n this brochure are subject to change without notice All rights reserved c Dealer Head Office Umeda Center Bldg 4 12 Nakazaki Nishi 2 chome Kita ku Osaka 530 8323 Japan Tokyo Office JR Shinagawa East Bldg 18 1 Konan 2 chome Minato ku Tokyo 108 0075 Japan http www daikin com global ...

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