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Daikin SUPER MULTI NX CTXS07JVJU, Service Manual

The Daikin SUPER MULTI NX CTXS07JVJU is a versatile and efficient air conditioning system. For detailed instructions on how to operate this unit, simply download the free Operation Manual from manualshive.com. Stay cool and comfortable all year round with this reliable product.

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Service 
Manual

G-Series / J-Series

SiUS12-928_B

[Applied Models]

 Inverter Multi : Heat Pump

Summary of Contents for SUPER MULTI NX CTXS07JVJU

Page 1: ...Service Manual G Series J Series SiUS12 928_B Applied Models Inverter Multi Heat Pump...

Page 2: ...09LVJU FTXS15HVJU FTXS15LVJU FDXS12LVJU FTXS18HVJU FTXS18LVJU CDXS15LVJU CDXS18LVJU Outdoor Unit 2MXS18GVJU 3MXS24JVJU 4MXS32GVJU 1 Safety Considerations vii 1 1 Safety Considerations for Repair vii 1...

Page 3: ...NIGHT SET Mode 44 1 9 ECONO Operation 45 1 10 HOME LEAVE Operation 46 1 11 INTELLIGENT EYE Operation CTXS FTXS Series 47 1 12 Inverter POWERFUL Operation 48 1 13 Other Functions 49 2 Function of Therm...

Page 4: ...R Operation 100 3 9 ON TIMER Operation 101 3 10 WEEKLY TIMER Operation 102 3 11 Note for Multi System 108 3 12 Quick Reference 110 4 FDXS D Series 111 4 1 Remote Controller 111 4 2 AUTO DRY COOL HEAT...

Page 5: ...6 Outdoor Unit PCB Abnormality 24 32 Class Only 165 6 7 OL Activation Compressor Overload 166 6 8 Compressor Lock 167 6 9 DC Fan Lock 168 6 10 Input Overcurrent Detection 169 6 11 Four Way Valve Abnor...

Page 6: ...MXS24JVJU 4MXS32GVJU 222 2 1 Removal of Outer Panels 222 2 2 Removal of Electrical Box 234 2 3 Removal of PCBs 240 2 4 Removal of Fan Motor 244 2 5 Removal of Coils Thermistors 245 2 6 Removal of Soun...

Page 7: ...stbite Use only pipes flare nuts tools and other materials designed specifically for R410A refrigerant systems Never use tools or materials designed for R22 refrigerant systems on an R410A refrigerant...

Page 8: ...tches or have become deteriorated have them replaced Damaged cable and wires may cause an electrical shock or fire Do not use a joined power cable or an extension cord or share the same power outlet w...

Page 9: ...SiUS12 928_B 1 List of Functions Part 1 List of Functions 1 Functions 2...

Page 10: ...Reliability Durability Auto Restart after Power Failure Comfort Control Auto Fan Speed Self Diagnosis Digital LED Display Indoor Unit Quiet Operation Wiring Error Check Function NIGHT QUIET Mode Autom...

Page 11: ...lure 3 D Airflow Self Diagnosis Digital LED Display COMFORT AIRFLOW Operation Wiring Error Check Function Comfort Control Auto Fan Speed Anticorrosion Treatment of Outdoor Heat Exchanger Indoor Unit Q...

Page 12: ...e COMFORT AIRFLOW Mode Self Diagnosis Digital LED Display Comfort Control Auto Fan Speed Wiring Error Check Function Indoor Unit Quiet Operation Anticorrosion Treatment of Outdoor Heat Exchanger NIGHT...

Page 13: ...re 3 D Airflow Self Diagnosis Digital LED Display COMFORT AIRFLOW Operation Wiring Error Check Function Comfort Control Auto Fan Speed Anticorrosion Treatment of Outdoor Heat Exchanger Indoor Unit Qui...

Page 14: ...ins Vertical Blades Wiring Error Check Function Vertical Auto Swing Up and Down Anti Corrosion Treatment of Outdoor Heat Exchanger Horizontal Auto Swing Right and Left 3 D Airflow Flexibility Multi Sp...

Page 15: ...SiUS12 928_B 7 Specifications Part 2 Specifications 1 Indoor Unit 8 2 Outdoor Unit 13...

Page 16: ...12 kBtu h Class Front Panel Color White White Airflow Rate H cfm m min 388 11 0 400 11 3 388 11 0 400 11 3 M 335 9 5 357 10 1 335 9 5 357 10 1 L 283 8 0 314 8 9 283 8 0 314 8 9 Fan Type Cross Flow Fa...

Page 17: ...ressure Level H M L dB A 45 41 36 44 40 35 45 41 36 44 40 35 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes Piping Connection Liquid in mm 1 4 6 4 1 4 6 4 Gas in mm 1 2 12 7 1 2 1...

Page 18: ...4 6 4 Gas in mm 3 8 9 5 3 8 9 5 Drain in mm 5 8 16 0 5 8 16 0 Drawing No 3D075491 3D075492 Model FTXS15LVJU FTXS18LVJU Cooling Heating Cooling Heating Rated Capacity 15 kBtu h Class 18 kBtu h Class Fr...

Page 19: ...2 26 0 I D 25 32 20 0 Drawing No 3D051781A 3D051782A Model FDXS09LVJU FDXS12LVJU Cooling Heating Cooling Heating Rated Capacity 9 kBtu h Class 12 kBtu h Class External Static Pressure inAq Pa 0 12 30...

Page 20: ...r Consumption Rated W 172 172 172 172 Power Factor Rated 94 4 94 4 94 4 94 4 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D in mm 7 7 8 35 7 16 24 7 16 200 900 620 7...

Page 21: ...mm 31 7 16 39 5 16 15 3 8 806 999 390 Weight Mass Lbs kg 139 63 Gross Weight Gross Mass Lbs kg 144 65 Sound Pressure Level dB A 50 51 Piping Connections Liquid in mm 1 4 2 6 4 2 Gas in mm 3 8 2 9 5 2...

Page 22: ...W D in mm 35 7 8 37 11 16 15 15 16 911 958 405 Weight Mass Lbs kg 168 76 Gross Weight Gross Mass Lbs kg 196 89 Sound Pressure Level dB A 52 54 Piping Connections Liquid in mm 1 4 3 6 4 3 Gas in mm 3 8...

Page 23: ...W D in mm 35 7 8 37 11 16 15 15 16 911 958 405 Weight Mass Lbs kg 168 76 Gross Weight Gross Mass Lbs kg 196 89 Sound Pressure Level dB A 52 54 Piping Connections Liquid in mm 1 4 4 6 4 4 Gas in mm 3 8...

Page 24: ...Circuit Board Connector Wiring Diagram 1 Indoor Unit 17 1 1 CTXS07JVJU CTXS09 12HVJU FTXS15 18HVJU 17 1 2 CTXS07LVJU FTXS09 12LVJU 19 1 3 FTXS15 18LVJU 22 1 4 FDXS09 12DVJU 25 1 5 FDXS09 12LVJU CDXS1...

Page 25: ...ctor for buzzer PCB 6 S28 Connector for signal receiver PCB 7 S32 Connector for indoor heat exchanger thermistor 8 S35 Connector for INTELLIGENT EYE sensor PCB 9 H1 H2 H3 FG Connector for terminal boa...

Page 26: ...etail PCB 1 Control PCB PCB 2 Signal Receiver PCB PCB 3 Buzzer PCB PCB 4 Display PCB PCB 5 INTELLIGENT EYE Sensor PCB S1 V1 FU1 S6 S8 2P099167 1 JC JB JA LED A S21 S35 H1 S26 S28 H2 H3 FG S32 SW1 S29...

Page 27: ...or heat exchanger thermistor 5 S41 Connector for swing motors 6 S46 Connector for display PCB 7 S47 Connector for signal receiver PCB 8 H1 H2 H3 FG Connector for terminal board 9 JA Address setting ju...

Page 28: ...SiUS12 928_B Indoor Unit Printed Circuit Board Connector Wiring Diagram 20 PCB Detail PCB 1 Control PCB V1 FU1 S1 S41 S21 S47 JB JA JC S46 S25 LED A S32 FG H1 H2 H3 2P206687 4...

Page 29: ...t SiUS12 928_B 21 Printed Circuit Board Connector Wiring Diagram PCB 2 Signal Receiver PCB PCB 3 Display PCB PCB 4 INTELLIGENT EYE Sensor PCB 3P210728 1 S48 3P210728 1 RTH1 SW1 S49 LED3 LED2 LED1 3EB8...

Page 30: ...at exchanger thermistor 5 S41 Connector for swing motors 6 S46 Connector for display PCB 7 S47 Connector for signal receiver PCB 8 H1 H2 H3 FG Connector for terminal board 9 JA Address setting jumper...

Page 31: ...Indoor Unit SiUS12 928_B 23 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB 1 Control PCB 2P227881 6 V1 H1 H2 H3 LED A S32 S1 S41 S46 S25 S47 S21 JB JA JC FG FU1 3 15A...

Page 32: ..._B Indoor Unit Printed Circuit Board Connector Wiring Diagram 24 PCB 2 Signal Receiver PCB PCB 3 Display PCB PCB 4 INTELLIGENT EYE Sensor PCB 3P224121 1 S48 3P224121 1 RTH1 SW1 LED3 LED2 LED1 S49 S36...

Page 33: ...r for display PCB 5 S32 Connector for indoor heat exchanger thermistor 6 H1 H2 H3 Connector for terminal board 7 GND Connector for terminal board ground 8 JA Address setting jumper Refer to page 265 f...

Page 34: ...Indoor Unit Printed Circuit Board Connector Wiring Diagram 26 PCB Detail PCB 1 Control PCB PCB 2 Display PCB S1 H2 S7 S26 S32 JC JB JA S21 2P131149 1 LED A FU1 H1 H3 V1 GND S1 LED3 LED2 SW1 2P084375 1...

Page 35: ...ed control HA 4 S26 Connector for display PCB 5 S32 Connector for indoor heat exchanger thermistor 6 H1 H2 H3 Connector for terminal board 7 FG GND Connector for terminal board ground 8 JA Address set...

Page 36: ...Unit Printed Circuit Board Connector Wiring Diagram 28 PCB Detail A1P Control PCB A2P Display PCB LED 1 does not function H2 H1 H3 FG JB S21 2P292535 1 LED A JC JA S7 S1 FU1 S26 V1 S32 S1 LED3 LED2 SW...

Page 37: ...or temperature outdoor heat exchanger discharge pipe 11 S91 Connector for fin thermistor 12 S92 Connector for gas pipe thermistor 13 S93 Connector for liquid pipe thermistor 14 AC1 AC2 Connector for M...

Page 38: ...for main PCB 2 S70 Connector for outdoor fan motor 3 FU201 Fuse 3 15 A 250 V 4 W V U N Connector for compressor 1 CN11 CN14 Connector for main PCB 2 L1 L2 Connector for reactor S10 S15 S51 S101 S80 S...

Page 39: ...tdoor Unit SiUS12 928_B 31 Printed Circuit Board Connector Wiring Diagram MID1 MID2 Inverter PCB SPM 3P080081 2 V3 HN HE FU1 HL S11 W V U N S34 S72 S70 3P080085 1 FU201 3 15A 3EB10032 4 CN14 CN11 L1 L...

Page 40: ...n motor 10 S80 Connector for four way valve coil 11 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 12 S92 Connector for gas pipe thermistor 13 S93 Connector fo...

Page 41: ...PCB Detail PCB 1 Main PCB PCB 2 Service Monitor PCB E1 E2 FU2 V3 HR1 white blue V100 HR2 FU3 2P209947 1 2P209947 2 S40 S20 S21 S22 S23 S70 S90 S92 S93 S51 W V U S15 AC2 blue S101 S10 V5 S80 V9 V2 FU1...

Page 42: ...NTELLIGENT EYE Operation CTXS FTXS Series 47 1 12 Inverter POWERFUL Operation 48 1 13 Other Functions 49 2 Function of Thermistor 51 3 Control Specification 54 3 1 Mode Hierarchy 54 3 2 Frequency Cont...

Page 43: ...cted by room temperature thermistor and the temperature of lower part of the room depending on the type of the indoor unit or installation condition Practically the temperature control is done by the...

Page 44: ...eep the room temperature constant Energy saving heating and cooling Once the set temperature is reached the energy saving operation activates to maintain the room temperature at low power Phase Descri...

Page 45: ...etic resin provide a wide range of airflow that guarantees comfortable air distribution Auto Swing The following table explains the auto swing process for cooling dry heating and fan CTXS07JVJU CTXS09...

Page 46: ...the order shown in the following diagram 1 The vertical blades fins move from the right to the left 2 The horizontal blades louvers move downward 3 The vertical blades fins move from the left to the...

Page 47: ...et to automatic Cooling The following drawing explains the principle of fan speed control for cooling CTXS J CTXS FTXS H FDXS D Series CTXS FTXS L CDXS FDXS L Series For CTSX FTXS L series the upper l...

Page 48: ...erable Detail The microcomputer automatically sets the temperature and airflow rate The difference between the room thermistor temperature at start up and the target temperature is divided into two zo...

Page 49: ...Heating Cooling switching point Tr Tt 5 4 F 3 0 C CTXS FTXS L series Tr Tt 4 5 F 2 5 C other models 2 Cooling Heating switching point Tr Tt 4 5 F 2 5 C 3 Thermostat ON OFF point is the same as the ON...

Page 50: ...s except A The monitoring time has passed while the temperature difference is in the zone B Cooling Dry 10 minutes Heating 10 seconds Cooling Dry CTXS FTXS series CDXS FDXS series Heating CTXS J CTXS...

Page 51: ...series Refer to Temperature Control on page 35 for detail B B A OFF OFF ON ON C 3 6 F 2 0 C 0 9 F 0 5 C 2 7 F 1 5 C Room thermistor temperature target temperature R14451 B B A OFF OFF ON ON C 1 5 C 2...

Page 52: ...raises the target temperature slightly in the case of cooling or lowers it slightly in the case of heating This prevents excessive cooling in summer and excessive heating in winter to ensure comfortab...

Page 53: ...sily activated from the wireless remote controller by pushing the ECONO button When this function is activated the maximum capacity also decreases The remote controller can send the ECONO command when...

Page 54: ...dicated on the display of the remote controller The indoor unit is operated according to the set temperature and airflow rate for HOME LEAVE which were pre set in the memory of the remote controller T...

Page 55: ...ions for example in cooling When the microcomputer does not have a signal from the sensor in 20 minutes it judges that nobody is in the room and operates the unit at a temperature shifted from the tar...

Page 56: ...50 90 rpm Ex POWERFUL operation in cooling Operation mode Fan speed Target temperature COOL H tap A rpm 64 4 F 18 C DRY Dry rotating speed A rpm Lowered by 3 6 4 5 F 2 2 5 C HEAT H tap A rpm 86 88 7 F...

Page 57: ...system operation there are times when the unit does not activate with the ON OFF button Ex CTXS FTXS L series 1 13 4 Air Purifying Filter with Photocatalytic Deodorizing Function CTXS J CTXS FTXS H Se...

Page 58: ...hen the power is restored in the same condition as before the power failure Note It takes 3 minutes to restart the operation because the 3 minute standby function is activated 1 13 7 WEEKLY TIMER Oper...

Page 59: ...D Four way valve Compressor Defrost solenoid valve EVA EVB Receiver 1 2 3 4 A B 5 R17358 Outdoor electronic expansion valve Four way valve Compressor EVB EVC EVA 5 A B C R17359 1 2 3 4 Outdoor electro...

Page 60: ...charge pipe temperature according to the outdoor and indoor heat exchanger temperature and controls the outdoor electronic expansion valve opening so that the target discharge pipe temperature can be...

Page 61: ...ulated with the liquid pipe temperature and the maximum indoor heat exchanger temperature The system controls the outdoor electronic expansion valve openings to obtain the target subcool 2 In heating...

Page 62: ...tion mode command which is set by each room in accordance with the procedure and determines the operation mode of the system The following procedure is taken when the modes conflict with each other 1...

Page 63: ...er limit frequency The minimum value is set as upper limit frequency among the frequency upper limits of the following functions Compressor protection input current discharge pipe temperature low Hz h...

Page 64: ...s adjusted according to the D value When the D value is low the frequency is lowered When the D value is high the frequency is increased 3 Limit of frequency increasing range When the difference betwe...

Page 65: ...elay switch of the four way valve is carried out Detail OFF delay switch of four way valve The four way valve coil is energized for 150 seconds after the operation is stopped 3 3 3 Four Way Valve Oper...

Page 66: ...of frequency is set to keep the discharge pipe temperature from rising further Detail A Hz 55 B Hz 65 C Hz 80 D seconds 120 E seconds 200 F seconds 470 A D E F B C R13528 Hz Frequency sec Time Zone Co...

Page 67: ...cy goes on Reset zone Limit of the frequency is canceled Limitation of current dropping and stop value according to the outdoor temperature The current drops when outdoor temperature becomes higher th...

Page 68: ...ture controls the following excluding stopped rooms Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Dropping zone The upper limit of frequency decreases Keep zon...

Page 69: ...outdoor temperature is more than 50 F 10 C the fan is turned off for 30 seconds 6 Fan speed control during forced operation The outdoor fan is controlled as well as normal operation during the forced...

Page 70: ...start of the operation or ending the previous defrosting Conditions for Canceling Defrost The target heat exchanger temperature as the canceling condition is selected in the range of 39 2 53 6 F 4 12...

Page 71: ...s connected and all rooms being air conditioned 4 Liquid pipe temperature control for stopped rooms 5 Dew prevention control for indoor rotor Open Control 1 Outdoor electronic expansion valve control...

Page 72: ...en control when starting Control of target discharge pipe temperature Control when the operating room is changed Control of target discharge pipe temperature Defrost control Pressure equalizing contro...

Page 73: ...om The outdoor electronic expansion valve opening is controlled when the operation starts and prevents superheating or liquid compression 3 12 5 Control when the Frequency Changes When the target disc...

Page 74: ...the thermistor is disconnected When the disconnection is ascertained the compressor continues operation for 9 minutes and then stops If the compressor stops repeatedly the system is shut down 3 12 9...

Page 75: ...ipe temperature The outdoor electronic expansion valve opening and the target discharge pipe temperature are adjusted every 20 seconds The target discharge pipe temperature is controlled by indoor hea...

Page 76: ...huts down the compressor If the OL compressor head temperature exceeds 266 F 130 C the compressor stops 3 13 3 Refrigerant Shortage Control Outline I Detecting by power consumption If the power consum...

Page 77: ...ndoor heat exchanger s temperature drops below the specified temperature during cooling the outdoor electonic expansion valve will open and the fully closed operation is carried out in the room After...

Page 78: ...peration 95 3 5 POWERFUL Operation 97 3 6 OUTDOOR UNIT QUIET Operation 98 3 7 ECONO Operation 99 3 8 OFF TIMER Operation 100 3 9 ON TIMER Operation 101 3 10 WEEKLY TIMER Operation 102 3 11 Note for Mu...

Page 79: ...heat well and how to use it efficiently Providing instructions to the user can reduce requests for servicing by 80 However proficient the installation and operating functions of the AC system are the...

Page 80: ...curtain the unit will not operate Do not drop the remote controller Do not get it wet The maximum distance for communication is approximately 23ft 7m Receiver Selects the airflow rate setting POWERFUL...

Page 81: ...tings Cancels the timer setting TIMER CANCEL button OUTDOOR UNIT QUIET operation OFF TIMER button QUIET button SELECT button INTELLIGENT EYE operation Adjusting the airflow direction HOME LEAVE operat...

Page 82: ...ress and select a operation mode 2 Press AUTO DRY COOL HEAT FAN is displayed on the LCD The OPERATION lamp lights up Display To stop operation Press again Press or is no longer displayed on the LCD Th...

Page 83: ...operation it takes some time before the room gets warmer In HEAT operation frost may occur on the outdoor unit and lower the heating capacity In that case the system switches into defrosting operatio...

Page 84: ...louvers horizontal blades 2 When the louvers have reached the desired position press once more Adjusting the right and left airflow direction To adjust the fins vertical blades 3 Press 4 When the fins...

Page 85: ...h tends to collect near the ceiling throughout the room preventing areas of cold and hot developing Always use a remote controller to adjust the angles of the louvers and fins If you attempt to move i...

Page 86: ...s displayed on the LCD is no longer displayed on the LCD Example When somebody in the room When nobody in the room Somebody back in the room Normal operation Back to normal operation 20 minutes after...

Page 87: ...o indoor unit location the speed of passersby temperature range etc The sensor also mistakenly detects pets sunlight fluttering curtains and light reflected off of mirrors as passersby INTELLIGENT EYE...

Page 88: ...UL operation cannot be used together with QUIET operation Priority is given to the function of whichever button is pressed last In COOL and HEAT operation To maximize the cooling heating effect the ca...

Page 89: ...ion will work only when the OUTDOOR UNIT QUIET operation is set on all operated indoor units However if using priority room setting see note for multi system This function is available in COOL HEAT an...

Page 90: ...w rate for HOME LEAVE operation When using HOME LEAVE operation for the first time please set the temperature and airflow rate for HOME LEAVE operation Record your preferred temperature and airflow ra...

Page 91: ...operation mode COOL or HEAT before using HOME LEAVE operation HOME LEAVE operation and POWERFUL operation cannot be used at the same time Last button that was pressed has priority The operation mode...

Page 92: ...setting by 10 minutes Holding down either button changes the setting rapidly The TIMER lamp lights up The TIMER lamp goes off is displayed blinks Display NOTE Notes on TIMER operation NIGHT SET mode...

Page 93: ...10 minutes Holding down either button changes the setting rapidly 3 Press again The TIMER lamp lights up Display To cancel ON TIMER operation Press To combine ON TIMER and OFF TIMER The TIMER lamp go...

Page 94: ...de Available only for COOL operation CAUTION Normally the operation mode in the room where the unit is first run is given priority but the following situations are exceptions so please keep this in mi...

Page 95: ...ion operation capacity will be concentrated in room A In such a case the cooling heating efficiency of the units in room B may be slightly reduced 3 Priority when using OUTDOOR UNIT QUIET operation Ex...

Page 96: ...he unit will not operate Do not drop the remote controller Do not get it wet The maximum distance for communication is approximately 23ft 7m FAN setting button Selects the airflow rate setting POWERFU...

Page 97: ...HEAT FAN Page 11 ECONO button ECONO operation SWING button Adjusting the airflow direction COMFORT SENSOR button COMFORT AIRFLOW and INTELLIGENT EYE operation WEEKLY button PROGRAM button COPY button...

Page 98: ...r conditioner The heat pump system heats the room by circulating hot air around all parts of the room After the start of HEAT operation it takes some time before the room gets warmer In HEAT operation...

Page 99: ...weeks Notes on the operating conditions The air conditioner always consumes a small amount of electricity even while it is not operating If you are not going to use the air conditioner for a long per...

Page 100: ...t airflow direction Press is displayed on the LCD The fins vertical blades will begin to swing The 3 D airflow direction Press and and are displayed on the LCD The louvers and fins move in turn To can...

Page 101: ...epends on the operation See the figure FAN operation COMFORT AIRFLOW COMFORT AIRFLOW Upper limit Upper limit Lower limit Lower limit Stop operation Stop operation Upper limit Lower limit Stop operatio...

Page 102: ...ler airflow rates the cooling heating effect is also smaller CAUTION When the airflow is set to indoor unit quiet operation will start and the noise from the unit will become quieter In indoor unit qu...

Page 103: ...he room Normal operation 20 minutes after start energy saving operation The air conditioner is in normal operation while the sensor is detecting the movement of people The set temperature is shifted i...

Page 104: ...UTO If the upper and lower airflow direction is selected the COMFORT AIRFLOW function will be canceled Notes on INTELLIGENT EYE operation Application range is as follows Vertical angle 90 Side view Ho...

Page 105: ...en using POWERFUL operation there are some functions which are not available POWERFUL operation cannot be used together with ECONO COMFORT AIRFLOW or OUTDOOR UNIT QUIET operation Priority is given to...

Page 106: ...wer This is convenient in consideration of your neighbors If using a multi system the OUTDOOR UNIT QUIET operation will work only when this function is set on all operated indoor units However if usin...

Page 107: ...tioner is limited by using ECONO operation The circuit breaker is unlikely to trip even if the air conditioner and other appliances are used at same time Running current and power consumption Normal o...

Page 108: ...me setting rapidly 3 Press again and setting time are displayed on the LCD The TIMER lamp lights yellow To cancel OFF TIMER operation Press and setting time are no longer displayed on the LCD and day...

Page 109: ...10 minutes Holding down either button changes the setting rapidly 3 Press again and setting time are displayed on the LCD The TIMER lamp lights yellow To cancel ON TIMER operation Press and setting ti...

Page 110: ...er settings up to programs 1 4 Program 1 ON Program 2 OFF Program 3 ON Program 4 OFF Monday Tuesday to Friday Saturday Sunday Use the copy mode to make settings for Tuesday to Friday because these set...

Page 111: ...ess The day of the week and the reservation number of the current day will be displayed 1 to 4 settings can be made per day 2 Press to select the desired day of the week and reservation number Pressin...

Page 112: ...R operation is activated The TIMER lamp lights yellow A reservation made once can be easily copied and the same settings used for another day of the week Refer to Notes on WEEKLY TIMER operation Do no...

Page 113: ...ress 5 Press 4 Press to select the destination day of the week 2 Press to confirm the day of the week to be copied 6 Press to complete the setting The whole reservation of the selected day of the week...

Page 114: ...ress The mode is switched to setting mode Go to STEP 4 Setting mode Page 23 3 Press to exit confirming mode Display To deactivate WEEKLY TIMER operation 2 Press to select the day of the week and the r...

Page 115: ...eration will be activated The reservations for each day of the week 2 Hold for 5 seconds The reservation of the selected day of the week will be deleted All reservations Hold for 5 seconds while norma...

Page 116: ...eration mode as that of the room with the first unit to be turned on Normally the operation mode in the room where the unit is first run is given priority but the following situations are exceptions s...

Page 117: ...mode from other rooms Room A is the priority room in the examples When COOL operation is selected in room A while operating the following modes in room B C and D Operation mode in room B C and D COOL...

Page 118: ...SiUS12 928_B CTXS L FTXS L Series Operation Manual 110 3 12 Quick Reference Quick Reference C 3P297290 1 C 3P297290 2...

Page 119: ...WERFUL operation page 12 5 TEMPERATURE adjustment buttons It changes the temperature setting 6 ON OFF button Press this button once to start operation Press once again to stop it 7 MODE selector butto...

Page 120: ...conditioner operates with the operation mode of your choice From the next time on the air conditioner will operate with the same operation mode 1 Press MODE selector button and select a operation mod...

Page 121: ...oom 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 defrost...

Page 122: ...utton again is no longer displayed on the LCD Notes on POWERFUL operation POWERFUL Operation cannot be used together with QUIET Operation Priority is given to the function of whichever button is press...

Page 123: ...operation 1 Press QUIET button is displayed on the LCD 2 Press QUIET button again disappears from the LCD Note on OUTDOOR UNIT QUIET operation This function is available in COOL HEAT and AUTO modes Th...

Page 124: ...E LEAVE lamp goes off To set the temperature and air flow rate for HOME LEAVE operation When using HOME LEAVE operation for the first time please set the temperature and air flow rate for HOME LEAVE o...

Page 125: ...n before leaving the living room when going to bed The unit will maintain the temperature in the room at a comfortable level while you sleep When you enter the living room in the morning the temperatu...

Page 126: ...setting 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 l...

Page 127: ...ing 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...

Page 128: ...mote controller aim the transmitter at the indoor unit If there is anything to block signals between the unit and the remote controller such as a curtain the unit will not operate Do not drop the remo...

Page 129: ...IMER button CLOCK button SELECT button QUIET button Page 15 OFF TIMER button Cancels the timer setting MODE selector button Selects the operation mode AUTO DRY COOL HEAT FAN Page 11 Page 16 Page 18 Pa...

Page 130: ...r conditioner The heat pump system heats the room by circulating hot air around all parts of the room After the start of HEAT operation it takes some time before the room gets warmer In HEAT operation...

Page 131: ...a curtain Blocking sunlight and air from outdoors increases the cooling heating effect Clogged air filters cause inefficient operation and waste energy Clean them once in about every 2 weeks Notes on...

Page 132: ...in sequence Auto Indoor unit quiet Low Middle low Middle Middle high High When the airflow is set to indoor unit quiet operation will start and the noise from the unit will become quieter In indoor un...

Page 133: ...re are some functions which are not available POWERFUL operation cannot be used together with ECONO and OUTDOOR UNIT QUIET operation Priority is given to the function of whichever button is pressed la...

Page 134: ...ient in consideration of your neighbors Page 19 If using a multi system the OUTDOOR UNIT QUIET operation will work only when this function is set on all operated indoor units However if using priority...

Page 135: ...is limited by using ECONO operation The circuit breaker is unlikely to trip even if the air conditioner and other appliances are used at same time This diagram is a representation for illustrative pu...

Page 136: ...minutes Holding down either button changes the time setting rapidly and setting time are displayed on the LCD The TIMER lamp lights yellow and setting time are no longer displayed on the LCD and day...

Page 137: ...n the LCD blinks 2 Press until the time setting reaches the point you like Each pressing of either button increases or decreases the time setting by 10 minutes Holding down either button changes the s...

Page 138: ...mode as that of the room with the first unit to be turned on Normally the operation mode in the room where the unit is first run is given priority but the following situations are exceptions so please...

Page 139: ...e operation mode of the priority room takes precedence the user can select a different operation mode from other rooms Room A is the priority room in the examples When COOL operation is selected in ro...

Page 140: ...SiUS12 928_B CDXS L FDXS L Series Operation Manual 132 5 10 Quick Reference Quick Reference C 3P297290 3...

Page 141: ...nit 156 6 1 Refrigerant Shortage 156 6 2 Low voltage Detection or Over voltage Detection 159 6 3 Signal Transmission Error on Outdoor Unit PCB 24 32 Class Only 161 6 4 Unspecified Voltage between Indo...

Page 142: ...4 7 6 Four Way Valve Performance Check 195 7 7 Inverter Unit Refrigerant System Check 195 7 8 Inverter Checker Check 196 7 9 Rotation Pulse Check on the Outdoor Unit PCB 197 7 10 Installation Conditio...

Page 143: ...indoor units connected to multi system outdoor unit If not set all the indoor units to the same operation mode and confirm that the operation lamp is not blinking Moreover when the operation mode is...

Page 144: ...D 1 LED 4 on the PCB When the microcomputer works in order the LED A blinks and when the system is in normal condition the red LEDs are OFF Even after the error is canceled and the unit operates in no...

Page 145: ...oling operation cannot be used when the outdoor temperature is below 14 F 10 C Diagnose with remote controller indication 144 145 Some indoor units do not operate Check the type of the indoor units Ch...

Page 146: ...e beeps indicate non corresponding codes 2 To return to the normal mode hold the timer cancel button down for 5 seconds When the remote controller is left untouched for 60 seconds it also returns to t...

Page 147: ...p 3 Diagnose by the sound beep The left side number does not correspond with the error code two consecutive beeps The left side number corresponds with the error code but the right side number does no...

Page 148: ...eep Both the left side and right side number corresponds with the error code 7 Determine the error code The numbers indicated when you hear the long beep are the error code Error codes and description...

Page 149: ...eps indicate non corresponding codes 2 To return to the normal mode hold the timer cancel button down for 5 seconds When the remote controller is left untouched for 60 seconds it also returns to the n...

Page 150: ...e long beep 3 Diagnose by the sound beep The left side number does not correspond with the error code two consecutive beeps The left side number corresponds with the error code but the right side numb...

Page 151: ...beep Both the left side and right side numbers correspond with the error code 7 Determine the error code The numbers indicated when you hear the long beep are the error code Error codes and descriptio...

Page 152: ...46 A5 Freeze up protection control or heating peak cut control 148 A6 Fan motor or related abnormality DC motor CTXS FTXS series 150 AC motor CDXS FDXS series 152 C4 Indoor heat exchanger thermistor o...

Page 153: ...igerant shortage 156 5 4 3 3 4 U2 Low voltage detection or over voltage detection 159 5 3 4 4 4 U7 Signal transmission error on outdoor unit PCB 24 32 class only 161 5 4 3 4 4 A5 Anti icing function 1...

Page 154: ...ller Display A1 Method of Malfunction Detection The system checks if the circuit works properly within the microcomputer of the indoor unit Malfunction Decision Conditions The system cannot set the in...

Page 155: ...Voltage as rated Error repeats Error repeats YES NO NO YES NO NO YES R15270 Caution To secure the connection once disconnect the connector and then reconnect it YES NO YES NO YES NO YES Match the comp...

Page 156: ...During heating operation the temperature detected by the indoor heat exchanger thermistor is used for the heating peak cut control operation halt outdoor fan stop etc Malfunction Decision Conditions F...

Page 157: ...icient air passage Clean the air filter Clean the indoor heat exchanger Replace the indoor unit PCB Replace the thermistor As described in the thermistor characteristic chart Check the air filter Chec...

Page 158: ...fan motor operation is used to determine abnormal fan motor operation Malfunction Decision Conditions The detected rotation speed does not reach the demanded rotation speed of the target tap and is l...

Page 159: ...Check the output of the fan motor connector R14970 NO YES YES NO YES NO Replace the indoor fan motor Replace the indoor unit PCB Replace the indoor unit PCB Replace the indoor fan motor Replace the in...

Page 160: ...er to P 192 NO NO NO NO NO NO YES YES YES YES YES YES R17393 Caution Replace the fan motor or the indoor unit PCB Replace the indoor fan motor Replace the indoor unit PCB Replace the capacitor Replace...

Page 161: ...ing compressor operation Supposed Causes Disconnection of connector Defective thermistor Defective indoor unit PCB Troubleshooting Check No 01 Refer to P 191 C4 Indoor heat exchanger thermistor C9 Roo...

Page 162: ...power supply waveform Troubleshooting Check No 11 Refer to P 193 Check the voltage of the indoor unit outdoor unit connection wires between No 1 and No 3 and between No 2 and No 3 Check No 11 Check t...

Page 163: ...d Wrong wiring of connecting wires Wrong indoor unit PCB or outdoor unit PCB mounted Defective indoor unit PCB Defective outdoor unit PCB Troubleshooting R11707 Caution NO YES YES YES NO NO Check the...

Page 164: ...ontinue for 7 minutes 18 class Input current input voltage A output frequency B Output frequency C 24 32 class Input current D output frequency E Output frequency F Refrigerant shortage detection II T...

Page 165: ...ening Correct it as required Also replace the cracked pipe Check the pipes for improper contact Correct them as required Also replace the cracked pipe Replace the outdoor electronic expansion valve Re...

Page 166: ...gerant Check No 12 Outdoor electronic expansion valve functioning Replace the thermistor s in position Open the stop valve Repair the pipe flare or replace the union Check the harness for loosening Co...

Page 167: ...no zero cross detection in approximately 10 seconds Outdoor Unit Low voltage detection The voltage detected by the DC voltage detection circuit is below 150 V for 0 1 second If the error repeats the...

Page 168: ...nectors or parts may be damaged NO NO YES NO YES YES Reconnect the harness Check the power supply voltage Check the connection of the compressor harness Disturbance factors Noise Power supply distorti...

Page 169: ...abnormality is determined when the data sent from the PM1 can not be received for 9 seconds The error counter is reset when the data from the PM1 can be successfully received Supposed Causes Defective...

Page 170: ...nal voltages Mismatching of indoor and outdoor units Supposed Causes Anti icing function in other rooms Wrong models interconnected Wrong indoor unit PCB or outdoor unit PCB mounted Troubleshooting No...

Page 171: ...or that are located in a shut down room Malfunction Decision Conditions In cooling operation the both conditions A and B are met for 5 minutes A Room temperature Indoor heat exchanger temperature 18 F...

Page 172: ...ve or coil Replace the outdoor heat exchanger thermistor Replace the room temperature thermistor Replace the room temperature thermistor or indoor heat exchanger thermistor Do the vacuum drying Replac...

Page 173: ...f the microcomputer is in abnormal running order Supposed Causes Defective outdoor unit PCB Noise Momentary fall of voltage Momentary power failure Troubleshooting R7183 Caution Be sure to turn off th...

Page 174: ...d in refrigerant Defective stop valve Troubleshooting Check No 01 Refer to P 191 Check No 12 Refer to P 194 Check No 13 Refer to P 195 Check No 14 Refer to P 195 R14438 Caution YES NG Discharge pipe t...

Page 175: ...d Troubleshooting Check No 15 Refer to P 196 Turn off the power Disconnect the harnesses U V and W R14439 Caution NO YES YES NO NO YES Check No 15 Check with the inverter checker Turn off the power an...

Page 176: ...error Supposed Causes Disconnection of the fan motor Foreign matter stuck in the fan Defective fan motor Defective outdoor unit PCB Troubleshooting Check No 16 Refer to P 197 R15890 Caution YES YES N...

Page 177: ...Check No 18 Refer to P 198 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged R15325 NO YES YES NO Check No 17 Check the installation c...

Page 178: ...ranges in the operating mode Malfunction Decision Conditions Either of the following conditions occurs 6 minutes after the compressor has started Cooling operation The lowest liquid pipe temperature...

Page 179: ...Replace the four way valve defective or dust clogged Reconnect the thermistor s in position Caution R15824 Be sure to turn off the power switch before connecting or disconnecting connectors or parts m...

Page 180: ...thermistor Defective outdoor electronic expansion valve or coil Refrigerant shortage Defective four way valve Water mixed in refrigerant Defective stop valve Defective outdoor unit PCB Troubleshootin...

Page 181: ...tive outdoor heat exchanger thermistor Defective outdoor unit PCB Troubleshooting Check No 01 Refer to P 191 Check No 12 Refer to P 194 Check No 17 Refer to P 198 Check No 18 Refer to P 198 Check No 1...

Page 182: ...tartup Fault condition is identified by the compressor current which is detected right after the compressor startup If the error repeats the system is shut down Reset condition Continuous run for abou...

Page 183: ...sconnect the reactor from the outdoor unit PCB and measure the resistance value between reactor terminals with tester Disconnect the compressor relay harness from the outdoor unit PCB and measure the...

Page 184: ...ected by checking the compressor running condition through the position detection circuit Malfunction Decision Conditions If the error repeats the system is shut down Reset condition Continuous run fo...

Page 185: ...ES YES Check No 20 Check the short circuit of the diode bridge Check No 15 Check with the inverter checker Turn off the power Disconnect the harnesses U V and W Turn on the power Check the electrolyti...

Page 186: ...as rated R15892 NO NO YES NO YES YES Check No 15 Check with the inverter checker Turn off the power Disconnect the harnesses U V and W Turn on the power Check the electrolytic capacitor voltage Elect...

Page 187: ...ompressor running frequency and CT detected input current Malfunction Decision Conditions The compressor running frequency is more than A Hz and input current is less than B A If the error repeats the...

Page 188: ...reconnect the harnesses Then turn on the power again and restart operation Replace the outdoor unit PCB Replace the outdoor unit PCB Replace the outdoor unit PCB Check the supply voltage Replace the...

Page 189: ...each thermistor Malfunction Decision Conditions The thermistor input is above 4 96 V or below 0 04 V with the power on J3 error is judged if the discharge pipe temperature is lower than the heat excha...

Page 190: ...scharge pipe temperature is lower than the heat exchanger temperature Replace the defective thermistor s Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Liqu...

Page 191: ...unction Decision Conditions With the compressor off the radiation fin temperature is above A The error is cleared when the temperature drops below B To cool the electrical components the outdoor fan s...

Page 192: ...eck the radiation fin temperature Check No 17 Check the installation condition Radiation fin dirty Above A As described in the thermistor characteristic chart Check No 01 Check the thermistor resistan...

Page 193: ...installation condition Slightly dirty Check the radiation fin temperature Turn off the power and turn it on again WARNING Replace the outdoor unit PCB Replace the outdoor fan motor Correct the connec...

Page 194: ...e radiation fin temperature with the compressor on is above A The error is cleared when the temperature drops below B If the error repeats the system is shut down Reset condition Continuous run for ab...

Page 195: ...radiation fin temperature Check No 17 Check the installation condition NO YES YES Above A Radiation fin dirty As described in the thermistor characteristic chart Check No 01 Check the thermistor resi...

Page 196: ...temperature Check No 17 Check the installation condition NO YES YES Above A Radiation fin dirty Check No 19 Check the outdoor fan or related Error displayed again Has the PCB been replaced Check if t...

Page 197: ...tions A position signal error occurs while the compressor is running A speed error occurs while the compressor is running An output overcurrent signal is fed from the output overcurrent detection circ...

Page 198: ...ut overcurrent may result from wrong internal wiring If the system is interrupted by an output overcurrent after the wires have been disconnected and reconnected for part replacement check the wiring...

Page 199: ...or is directly mounted on the display PCB Remove the display PCB from the control PCB to measure the resistance When the indoor heat exchanger thermistor is soldered on the PCB remove the thermistor a...

Page 200: ...ction 2 With the power on operation off and the connector connected check the following Output voltage of about 5 V between pins 1 and 3 Generation of 3 pulses between pins 2 and 3 when the fan motor...

Page 201: ...sure the power supply waveform between No 1 and No 2 on the terminal board and check the waveform disturbance Check to see if the power supply waveform is a sine wave Fig 1 Check to see if there is wa...

Page 202: ...note that the latching sound varies depending on the valve type If the system keeps operating with a defective outdoor electronic expansion valve the following problem may occur Valveopening position...

Page 203: ...eck the continuity Start heating operation Four way valve coil Cooling dry No continuity Heating Continuity Replace the outdoor unit PCB Replace the four way valve coil Replace the four way valve Four...

Page 204: ...oltage of the built in smoothing electrolytic capacitor drops to 10 VDC or below before carrying out the service work Reference If the terminals of the compressor are not FASTON terminals difficult to...

Page 205: ...e terminals may be burned due to loosening 7 9 Rotation Pulse Check on the Outdoor Unit PCB Check No 16 Outdoor fan motor Make sure that the voltage of 320 30 V is applied 1 Set operation off and powe...

Page 206: ...irty Change the installation location or direction Change the installation location or direction Clean the outdoor heat exchanger Change the installation location or direction Check the outdoor temper...

Page 207: ...sistance is or less than 1 k short circuit occurs on the main circuit R15128 YES YES NO NO Check the outdoor unit fan system Outdoor unit fan running Outdoor unit fan system functioning Go to Check No...

Page 208: ...he main circuit for short circuit With the circuit breaker still on measure the voltage according to the drawing of the model in question Be careful never to touch any live parts 18 class 24 32 class...

Page 209: ...asure resistance between the terminals of the power module and the terminals of the compressor with a multi tester Evaluate the measurement results referring to the following table 18 class 24 32 clas...

Page 210: ...Blankets 213 1 6 Removal of Coils Thermistors 215 1 7 Removal of Four Way Valve Defrost Solenoid Valve 217 1 8 Removal of Distributor 219 1 9 Removal of Compressor 220 2 Outdoor Unit 3MXS24JVJU 4MXS3...

Page 211: ...s or more after turning off all power supplies before disassembling work Step Procedure Points 1 Appearance features 2 Remove the 4 screws of the top panel and the 6 screws of the front panel 3 Remove...

Page 212: ...Remove all the screws of the connecting wires and the power supply wires 3 Remove the screw of the ground wire 2 Disconnect the harnesses S20 White S21 Red Bundle the harnesses of the electronic expan...

Page 213: ...ure outdoor heat exchanger discharge pipe S92 gas pipe thermistors S93 liquid pipe thermistors Pull out the clamp When reassembling insert each clamp of the themistors into one of the holes as below W...

Page 214: ...utdoor Unit 2MXS18GVJU Removal Procedure 206 4 Disconnect the relay connector of the compressor 5 Release the clamp with pliers 6 Disconnect the reactor lead wires Step Procedure Points R17065 R17066...

Page 215: ...l box 1 Remove the screw of the shield plate 2 Unfasten the 2 hooks and remove the shield plate 3 Remove the screw on the right side of the electrical box 4 Remove the screw on the front side of the e...

Page 216: ...5 Remove the drip proof cover 6 Disconnect the connector for the fan motor S70 from the inverter PCB MID2 Release the fan motor lead wire from the hooks 7 Remove the electrical box Step Procedure Poin...

Page 217: ...move the screw of the main PCB and unfasten the 2 hooks When reassembling insert the base bar into the hole of the main PCB 2 Unfasten the hook of the terminal board and open the terminal board 3 Disc...

Page 218: ...p the main PCB 6 Disconnect the connectors S31 S32 S33 S71 H1 H2 7 The figure shows the main PCB Refer to page 30 for detail Step Procedure Points R2181 S31 S71 S33 R10362 H1 yellow S32 H2 blue R10363...

Page 219: ...Remove the 7 screws and remove the inverter PCB MID2 Step Procedure Points Priority room setting switch SW4 Wiring error check switch SW3 Forced operation ON OFF switch SW1 NIGHT QUIET mode setting sw...

Page 220: ...motor and release the fan motor lead wire according to the Removal of Electrical Box When reassembling align the mark of outdoor fan with the D cut section of motor shaft Nut size M6 2 Remove the 2 s...

Page 221: ...ure to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the 5 screws of the right side panel 2 Release the clamp with pliers 3...

Page 222: ...4 4 Remove the sound blankets top upper top inner outer inner Step Procedure Points Sound blanket top upper Sound blanket inner Sound blanket outer R17405 Sound blanket top inner Carefully remove the...

Page 223: ...ay valve coil 2 Remove the screw and remove the defrost solenoid valve coil 3 Pull out the electronic expansion valve coil for each room Place the thermistor so that its edge comes up to the edge of t...

Page 224: ...careful not to lose the clip and fixture for the thermistors 6 Release the wire harnesses S90 outdoor temperature thermistor blue outdoor heat exchanger thermistor gray discharge pipe thermistor blac...

Page 225: ...he piping by non oxidation brazing 2 It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat Keep below 248 F 120 C Wrap...

Page 226: ...solenoid valve Note Do not use a metal saw for cutting pipes or sawdust will enter the circuit When withdrawing the pipes be careful not to pinch them firmly with pliers The pipes may get deformed Pr...

Page 227: ...he refrigerant gas Cautions for restoration 1 Restore the piping by non oxidation brazing 2 It is required to prevent the carbonization of the oil inside the four way valve and the deterioration of th...

Page 228: ...re to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the terminal cover 2 Disconnect the compressor lead wires 3 Remove the 2...

Page 229: ...to prevent the carbonization of the oil inside the four way valve and the deterioration of the gaskets affected by heat Keep below 248 F 120 C Wrap the four way valve with wet cloth and provide water...

Page 230: ...arning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points Appearance features 1 Remove the suction grille The hooks are secured...

Page 231: ...emoval Procedure 2 Slide the suction grille downward to unfasten the 3 top hooks 3 Remove the suction grille 2 Remove the top panel 1 Remove the 4 screws on the back and the screw on the left side Ste...

Page 232: ...val Procedure 224 2 Remove the 2 screws on the front and the screw on the right side panel 3 Lift the top panel and remove it 3 Remove the right side panel 1 Remove the 5 screws Step Procedure Points...

Page 233: ...Outdoor Unit 3MXS24JVJU 4MXS32GVJU SiUS12 928_B 225 Removal Procedure 2 Slide the right side panel downward to unfasten the 2 hooks on the back side Step Procedure Points R6377 Hook R14614 Hook R14615...

Page 234: ...e the 2 screws to remove the service lid This model has a conduit mounting plate 4 Remove the front panel 2 This screw is M5 16 1 Remove the 2 screws 2 Slide the front panel 2 panel downward to unfast...

Page 235: ...ont panel 2 5 Remove the front panel 1 Remove the discharge grille and outdoor fan first to remove the front panel 1 1 Remove the 4 screws on the discharge grille 2 Pull the bottom of the discharge gr...

Page 236: ...ward to unfasten the 2 hooks at the top 4 Remove the discharge grille 5 Remove the nut and remove the outdoor fan Nut size M8 When reassembling align the mark of the outdoor fan with the D cut section...

Page 237: ...9 Removal Procedure 6 Remove the 2 screws of the partition plate 1 7 Remove the screw at the bottom left of the front panel 1 8 Remove the screw at the bottom of the left side Step Procedure Points R1...

Page 238: ...ure 230 9 Remove the screw at the bottom of the back side 10 The front panel 1 has a hook Lift the front panel 1 11 Remove the front panel 1 Be sure to detach the front panel 1 carefully so as not to...

Page 239: ...sembling bundle the wires with clamp When reassembling pass the wires through the partition plate 2 3 Release the holder of the outdoor temperature thermistor The holder is secured in the clearances o...

Page 240: ...nit 3MXS24JVJU 4MXS32GVJU Removal Procedure 232 4 Release the thermistor wire from the groove 5 Remove the 3 screws on the rear panel 6 Remove the screw on the bottom frame Step Procedure Points Groov...

Page 241: ...S12 928_B 233 Removal Procedure 7 Remove the screw on the stop valve mounting plate 8 Lift the rear panel to unfasten the 2 hooks 9 Remove the rear panel Step Procedure Points R10392 Stop valve mounti...

Page 242: ...it for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the 2 screws to detach the ground wires 2 Disconnect the connector for the fan m...

Page 243: ...nsion valve coils for room A B C D and pull out the clamp A S20 white B S21 red C S22 blue D S23 yellow The 3MXS model does not have S23 When reassembling insert each clamp into the hole 6 Disconnect...

Page 244: ...connector for the thermistors S90 and pull out the clamp When reassembling insert the clamp into the hole 9 The wire harness of the thermistors is hooked under the electrical box Unhook it and pull o...

Page 245: ...moval Procedure 10 Disconnect the connector for the overload protector S40 11 The wire harness for the compressor is attached to the partition plate 1 by the clamp 12 Pull out the clamp with pliers St...

Page 246: ...edure 238 13 Disconnect the relay connector of the compressor 14 Remove the screw on the stop valve mounting plate 15 Remove the screw on the partition plate 1 Step Procedure Points R6469 R10395 Elect...

Page 247: ...Unit 3MXS24JVJU 4MXS32GVJU SiUS12 928_B 239 Removal Procedure 16 Slide the electrical box leftward to unfasten the hook on the right side 17 Remove the electrical box Step Procedure Points R10401 Hook...

Page 248: ...minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the main PCB 1 Open the cover of the electrical box Unfasten the 4 hooks The hooks are ma...

Page 249: ...ervice monitor PCB S10 terminal board transmission HR1 HR2 reactor AC1 AC2 terminal board power supply U V W compressor 6 Remove the main PCB 2 Remove the reactor 1 Remove the screw 2 Remove the 3 scr...

Page 250: ...Remove the service monitor PCB 1 Disconnect the connectors from the service monitor PCB S52 S102 2 Slightly lift the top hook to unfasten it 3 Unfasten the bottom hook to remove the service monitor PC...

Page 251: ...t 3MXS24JVJU 4MXS32GVJU SiUS12 928_B 243 Removal Procedure 4 Remove the terminal board 1 Remove the screw 2 Unfasten the hook 3 Remove the terminal board Step Procedure Points R10411 Terminal board R1...

Page 252: ...rk Step Procedure Points 1 2 Remove the 2 lower screws of the fan motor Remove the 2 upper screws Be sure to remove the lower screws first If the upper screws are removed first the fan motor may tilt...

Page 253: ...ling work Step Procedure Points 1 Remove the electronic expansion valve coil 1 Pull the electronic expansion valve coils 2 Remove the thermistors Place the thermistor so that its edge comes up to the...

Page 254: ...putty and pull out the liquid pipe thermistors Be careful not to lose the fixtures for the thermistors 3 Pull out the outdoor heat exchanger thermistor Step Procedure Points Liquid pipe thermistor R17...

Page 255: ...ove the clip from the outdoor heat exchanger thermistor Be careful not to lose the clip for the thermistor 5 Slightly open the sound blanket outer 6 Remove the sound blanket top upper Step Procedure P...

Page 256: ...Procedure 248 7 Remove the discharge pipe thermistor 8 Remove the fixture Be careful not to lose the fixture for the thermistor 3 Remove the four way valve coil 1 Remove the screw Step Procedure Point...

Page 257: ...Outdoor Unit 3MXS24JVJU 4MXS32GVJU SiUS12 928_B 249 Removal Procedure 2 Remove the four way valve coil Step Procedure Points R10432 Four way valve coil...

Page 258: ...r supplies before disassembling work Step Procedure Points 1 Open the sound blanket outer 2 Remove the sound blanket top upper The sound blanket is fragile Carefully pass the discharge pipe through it...

Page 259: ...the sound blanket top inner The sound blanket is fragile Carefully pass the discharge pipe through it 6 Open the sound blanket inner and pass it through the part of the mufflers The sound blanket is...

Page 260: ...SiUS12 928_B Outdoor Unit 3MXS24JVJU 4MXS32GVJU Removal Procedure 252 7 Remove the sound blanket inner Step Procedure Points R10439...

Page 261: ...ore after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the terminal cover 2 Disconnect the compressor lead wires U red V yellow W blue 3 Remove the overload...

Page 262: ...ation and Field Settings 1 Pump Down Operation 255 2 Forced Operation 256 3 Wiring Error Check Function 257 4 Trial Operation 259 5 Field Settings 261 5 1 Outdoor Unit 261 5 2 Indoor Unit 264 6 Applic...

Page 263: ...g the unit Detail 1 Remove the valve caps from the liquid stop valve and the gas stop valve 2 Carry out forced cooling operation 3 After 5 to 10 minutes close the liquid stop valve with a hexagonal wr...

Page 264: ...e 4 The operation mode switch SW2 on the outdoor unit is set to the cooling mode 4 The operation mode switch SW2 on the outdoor unit is set to the heating mode Start Press the forced operation ON OFF...

Page 265: ...service monitor LED indicators start blinking Self correction complete The LED indicators 1 2 18 class 1 3 24 class or 1 4 32 class blink one after another Self correction impossible The LED indicato...

Page 266: ...data on the microcomputer memory Those data can be checked by looking at the service monitor LED indicators when the wiring error checking is over during forced operation at the stop of the system The...

Page 267: ...rts operation with the previous operation mode when the circuit breaker is restored In cooling operation select the lowest programmable temperature in heating operation select the highest programmable...

Page 268: ...TEMP button and the MODE button at the same time 3 Press the MODE button twice T appears on the display to indicate that trial operation is selected 4 Press the MODE button and select the operation m...

Page 269: ...starts when all the following conditions are met Priority room setting is made POWERFUL signal from the priority room unit is received Note The operation mode of the priority room unit has precedence...

Page 270: ...of the connector S15 Setting to cooling only C Short circuit pins 3 and 5 of the connector S15 The following specifications apply to the connector housing and pins JST products Housing VHR 5N Pin SVH...

Page 271: ...ing noise of the outdoor unit at nighttime This function is useful if the customer is worried about the effects of the operating noise on the neighbors However if NIGHT QUIET mode is running cooling c...

Page 272: ...troller to set the model type Set the DIP switch as shown in the illustration The factory set is the heat pump side Heat pump model Set the DIP switch to H P Cooling only model Set the DIP switch to C...

Page 273: ...wired remote controller Refer to the following pages for the appropriate indoor unit and wireless remote controller CTXS FTXS Series 1 Remove the front grille 2 Remove the electrical box 3 Remove the...

Page 274: ...6 28 ARC452 series ARC433 series Jumper ADDRESS R12065 EXIST CUT 1 2 Jumper R6573 ADDRESS EXIST CUT 1 2 Jumper on indoor unit PCB Function When connected factory set When cut JB Fan speed setting when...

Page 275: ...n of the power transistor and the diode bridge Applying the paste should be implemented in accordance with the following instruction Note There is the possibility of failure with smoke in case of bad...

Page 276: ...SiUS12 928_B Appendix 268 Part 9 Appendix 1 Piping Diagrams 269 1 1 Indoor Unit 269 1 2 Outdoor Unit 271 2 Wiring Diagrams 273 2 1 Indoor Unit 273 2 2 Outdoor Unit 276...

Page 277: ...IPING 1 4CuT CROSS FLOW FAN FAN MOTOR 5 16CuT INDOOR UNIT 1 2CuT M HEAT EXCHANGER REFRIGERANT FLOW HEATING COOLING 5 8 1 2 A THERMISTOR ON HEAT EXCH FTXS15 FTXS18 FTXS24 4D047162A INDOOR UNIT 1 4 CuT...

Page 278: ...G HEATING THERMISTOR ON HEAT EXCH 4D051787 INDOOR UNIT 1 4CuT HEAT EXCHANGER FIELD PIPING 1 4CuT SIROCCO FAN M FAN MOTOR 3 8CuT FIELD PIPING 3 8CuT REFRIGERANT FLOW COOLING HEATING 4D074621 THERMISTOR...

Page 279: ...STOR DE 3D048177A OUTDOOR UNIT HEAT EXCHANGER A 5 16CuT EV RECEIVER HEADER 5 16CuT 5 16CuT HEADER FILTER 5 16CuT 5 16CuT B EV 3 8CuT 5 16CuT 5 16CuT 5 16CuT FILTER 5 16CuT C EV 5 16CuT 5 16CuT 1 2CuT...

Page 280: ...1 2CuT 5 16CuT FILTER 5 16CuT 5 16CuT 5 8CuT 5 16CuT EVB EVC EVD FIELD PIPING GAS ROOM D 5 8CuT ROOM C 5 8CuT ROOM B 1 2CuT ROOM A 3 8CuT FIELD PIPING LIQUID ROOM D 1 4CuT ROOM C 1 4CuT ROOM B 1 4CuT...

Page 281: ...E GROUND FUSE HARNESS PILOT LAMP FAN MOTOR SWING MOTOR PRINTED CIRCUIT BOARD THERMISTOR CONNECTOR OPERATION SWITCH TERMINAL STRIP PROTECTIVE GROUND 3D038065L PCB4 PCB3 PCB5 LED1 H1P R1T t S37 S38 LED2...

Page 282: ...R CENTRALIZED CONTROL SIGNAL RECEIVER 3D045012M 1 X1M PCB1 PCB3 S46 S49 2 H1 BLK 1 1 BLK 1 3 BLK 3 15A WHT OUTDOOR 2 BLK C102 V1 BLK RED 3 H2 MR10 BLK GRN BLK FIELD WIRING BLK C101 BLK H3 9 9 BLK CAUT...

Page 283: ...NTROL CIRCUIT TERMINAL BLOCK NOISE FILTER FERRITE CORE NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN 3D045012L X1M A1P 1 1 BLK A2P H1 2 W...

Page 284: ...EFROST SOLENOID VALVE COIL PRINTED CIRCUIT BOARD DIODE BRIDGE COMPRESSOR MOTOR FAN MOTOR REACTOR OVERLOAD PROTECTOR CURRENT TRANSFORMER MID1 MID2 SPM MOLDED INTER CONNECT DEVICE SYSTEM POWER MODULE AS...

Page 285: ...1 X3M RED BLU YLW MRC M S40 W ROOM B D S93 A S10 X11A BLU 6 FU3 RED Y2E SW2 M1F V9 3 1 3 PCB1 BLU 30A WHT ORG L2 YLW YLW R11T ROOM A YLW 2 SA2 Y4E 1 YLW FU1 5 Y3E Z4C R7T 9 R10T M BLU DISCHARGE 1 V10...

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