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Daikin FTXS30LVJU, Service Manual


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Troubleshooting

SiUS091133

109

Service Diagnosis

4.8

Signal Transmission Error (between Indoor Unit and 
Outdoor Unit)

Remote 
Controller 
Display

U4

Method of 
Malfunction 
Detection

The data received from the outdoor unit in indoor unit-outdoor unit signal transmission is checked 
whether it is normal.

Malfunction 
Decision 
Conditions

The data sent from the outdoor unit cannot be received normally, or the content of the data is 
abnormal.

Supposed 
Causes

Wiring error

Breaking of the connection wires between the indoor and outdoor units (wire No. 3)

Defective outdoor unit PCB

Defective indoor unit PCB

Disturbed power supply waveform

Summary of Contents for FTXS30LVJU

Page 1: ...Service Manual Inverter Pair FTXS L Series FDXS L Series SiUS091133 Applied Models Inverter Pair Cooling Only Inverter Pair Heat Pump...

Page 2: ...ng Only Indoor Unit FTXS30LVJU FTXS36LVJU Outdoor Unit RKS30LVJU RKS36LVJU Heat Pump Indoor Unit FTXS09LVJU FDXS09LVJU FTXS12LVJU FDXS12LVJU FTXS15LVJU FTXS18LVJU FTXS24LVJU FTXS30LVJU FTXS36LVJU Outd...

Page 3: ...3 1 1 FTXS09 12LVJU 13 1 2 FTXS15 18 24 30 36LVJU 16 1 3 FDXS09 12LVJU 19 2 Outdoor Unit 21 2 1 RXS09 12LVJU 21 2 2 RXS15 18LVJU 23 2 3 RXS24LVJU RK X S30 36LVJU 25 Part 4 Function and Control 27 1 Ma...

Page 4: ...5 1 System Configuration 56 2 FTXS Series 57 2 1 Remote Controller 57 2 2 AUTO DRY COOL HEAT FAN Operation 59 2 3 Adjusting the Airflow Direction and Rate 61 2 4 COMFORT AIRFLOW INTELLIGENT EYE Operat...

Page 5: ...ty 119 4 17 Discharge Pipe Temperature Control 121 4 18 High Pressure Control in Cooling 123 4 19 Compressor System Sensor Abnormality 125 4 20 Position Sensor Abnormality 128 4 21 DC Voltage Current...

Page 6: ...moval of Vertical Blade ASSYs 220 3 Indoor Unit FTXS30 36LVJU 221 3 1 Removal of Air Filters Front Panel 221 3 2 Removal of Front Grille 224 3 3 Removal of Electrical Box 228 3 4 Removal of PCBs 232 3...

Page 7: ...oval of Fan Motor 374 7 5 Removal of Coils Thermistors 375 7 6 Removal of Sound Blankets 378 7 7 Removal of Compressor 380 Part 8 Trial Operation and Field Settings 382 1 Pump Down Operation 383 2 For...

Page 8: ...SiUS091133 Table of Contents vii...

Page 9: ...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 10: ...hes 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 wit...

Page 11: ...SiUS091133 1 List of Functions Part 1 List of Functions 1 Functions 2 1 1 FTXS Series 2 1 2 FDXS Series 4...

Page 12: ...ity Durability Auto Restart after Power Failure 3 D Airflow Self Diagnosis Digital LED Display COMFORT AIRFLOW Operation Wiring Error Check Function Comfort Control Auto Fan Speed Anticorrosion Treatm...

Page 13: ...COMFORT AIRFLOW Operation Wiring Error Check Function Comfort Control Auto Fan Speed Anticorrosion Treatment of Outdoor Heat Exchanger Indoor Unit Quiet Operation Flexibility Multi Split Split Type C...

Page 14: ...er Power Failure COMFORT AIRFLOW Operation Self Diagnosis Digital LED Display Comfort Control Auto Fan Speed Wiring Error Check Function Indoor Unit Quiet Operation Anticorrosion Treatment of Outdoor...

Page 15: ...SiUS091133 5 Specifications Part 2 Specifications 1 Specifications 6 1 1 FTXS Series 6 1 2 FDXS Series 11...

Page 16: ...shable Mildew Proof Running Current Rated A 0 09 0 08 0 11 0 10 0 13 0 12 0 14 0 13 Power Consumption Rated W 18 18 21 21 26 26 28 28 Power Factor Rated 96 2 97 8 91 8 91 3 96 2 94 2 96 2 93 6 Tempera...

Page 17: ...Current Rated A 0 31 0 29 0 31 0 29 0 32 0 30 0 32 0 30 Power Consumption Rated W 38 38 38 38 38 38 38 38 Power Factor Rated 58 9 57 0 58 9 57 0 57 1 55 1 57 1 55 1 Temperature Control Microcomputer C...

Page 18: ...A 0 57 0 51 0 57 0 51 Power Consumption Rated W 69 68 69 68 Power Factor Rated 58 2 58 0 58 2 58 0 Temperature Control Microcomputer Control Dimensions H W D in mm 13 3 8 41 5 16 9 3 4 340 1 050 248 P...

Page 19: ...oof Running Current Rated A 0 38 0 34 0 38 0 34 Power Consumption Rated W 77 77 Power Factor Rated 97 4 98 5 97 4 98 5 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D...

Page 20: ...ilter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 38 0 34 0 38 0 34 0 38 0 34 0 38 0 34 Power Consumption Rated W 77 77 77 77 Power Factor Rated 97 4 98 5...

Page 21: ...ted A 0 58 0 52 0 58 0 52 0 58 0 52 0 58 0 52 Power Consumption Rated W 72 72 72 72 72 72 72 72 Power Factor Rated 59 7 60 2 59 7 60 2 59 7 60 2 59 7 60 2 Temperature Control Microcomputer Control Mic...

Page 22: ...ng Diagram 12 Part 3 Printed Circuit Board Connector Wiring Diagram 1 Indoor Unit 13 1 1 FTXS09 12LVJU 13 1 2 FTXS15 18 24 30 36LVJU 16 1 3 FDXS09 12LVJU 19 2 Outdoor Unit 21 2 1 RXS09 12LVJU 21 2 2 R...

Page 23: ...r for signal receiver PCB 8 H1 H2 H3 FG Connector for terminal board 9 JA Address setting jumper Refer to page 388 for detail 10 JB Fan speed setting when compressor stops for thermostat OFF JC Power...

Page 24: ...SiUS091133 Indoor Unit Printed Circuit Board Connector Wiring Diagram 14 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 25: ...it SiUS091133 15 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 3EB86...

Page 26: ...or signal receiver PCB 8 H1 H2 H3 FG Connector for terminal board 9 JA Address setting jumper Refer to page 388 for detail 10 JB Fan speed setting when compressor stops for thermostat OFF JC Power fai...

Page 27: ...Indoor Unit SiUS091133 17 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB 1 Control PCB 2P227881 5 2P227881 6 V1 H1 H2 H3 LED A S32 S1 S41 S46 S25 S47 S21 JB JA JC FG FU1 3 15A...

Page 28: ...3 Indoor Unit Printed Circuit Board Connector Wiring Diagram 18 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 3...

Page 29: ...or for terminal board 7 FG GND Connector for terminal board ground 8 JA Address setting jumper Refer to page 388 for detail 9 JB Fan speed setting when compressor stops for thermostat OFF JC Power fai...

Page 30: ...nit Printed Circuit Board Connector Wiring Diagram 20 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 SW1...

Page 31: ...er PCB 2 S20 Connector for electronic expansion valve coil 3 S40 Connector for overload protector 4 S70 Connector for fan motor 5 S80 Connector for four way valve coil 6 S90 Connector for thermistors...

Page 32: ...ector Wiring Diagram 22 PCB Detail PCB 1 Filter PCB PCB 2 Main PCB PCB 3 Forced Operation Button PCB HR1 HL2 3P254234 7 FU1 HN2 S FU3 AC2 E1 E2 AC1 S11 V3 V2 S10 J4 S90 FU2 S100 2P290759 2 S70 S40 S20...

Page 33: ...ced cooling operation ON OFF button Refer to page 384 for detail 1 S10 Connector for S11 on filter PCB 2 S12 Connector for HL4 HN4 on filter PCB 3 S20 Connector for electronic expansion valve coil 4 S...

Page 34: ...rinted Circuit Board Connector Wiring Diagram 24 PCB Detail PCB 1 Filter PCB PCB 2 Main PCB 3P273862 3 SW1 S11 FU1 FU3 V2 V3 S HL1 HN1 E2 E1 HN2 HL2 HN4 HL4 S80 S10 2P273854 5 S70 S20 S40 S90 FU2 J6 L...

Page 35: ...or fan motor 6 S80 Connector for four way valve coil 7 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 8 AC1 AC2 Connector for terminal board power supply 9 HR1...

Page 36: ...g Diagram 26 PCB Detail PCB 1 Main PCB PCB 2 Service Monitor PCB SW4 A and SW4 C has no function and keep it off V3 FU1 E1 E2 FU2 V100 HR1 FU3 2P266264 5 2P266264 6 S40 S20 S70 S90 S51 W V U S10 AC2 S...

Page 37: ...1 10 INTELLIGENT EYE Operation FTXS Series 38 1 11 Inverter POWERFUL Operation 39 1 12 Other Functions 40 2 Function of Thermistor 41 3 Control Specification 42 3 1 Mode Hierarchy 42 3 2 Frequency Con...

Page 38: ...emperature 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 target temperature appropriately adjusted for...

Page 39: ...ep the room temperature constant Energy saving heating and cooling Once the set temperature is reached the energy saving operation enables to maintain the room temperature at low power Phase Descripti...

Page 40: ...o the entire room Wide Angle Fins The fins made of elastic synthetic resin provide a wide range of airflow that guarantees comfortable air distribution Auto Swing The following table explains the auto...

Page 41: ...ontal and vertical swing motion is altered and the airflow direction changes in the order shown in the following diagram 1 The vertical blades fins move from the right to the left 2 The horizontal bla...

Page 42: ...drawing explains the principle of fan speed control for cooling For FTXS series the upper limit is M tap in 30 minutes from the operation start Heating In heating operation the fan speed is regulated...

Page 43: ...divided into two zones Then the unit operates in an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level Room thermistor temperature at start up Target t...

Page 44: ...lows 1 Heating Cooling switching point Tr Tt 3 0 C 5 4 F FTXS series Tr Tt 2 5 C 4 5 F FDXS series 2 Cooling Heating switching point Tr Tt 2 5 C 4 5 F 3 Thermostat ON OFF point is the same as the ON O...

Page 45: ...pt A The monitoring time has passed while the temperature difference is in the zone B Cooling Dry 10 minutes Heating 10 seconds Cooling Dry FTXS series FDXS series Heating Refer to Temperature Control...

Page 46: ...atically 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...

Page 47: ...om 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 the unit is in C...

Page 48: ...ns 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 targe...

Page 49: ...POWERFUL operation in cooling Operation mode Fan speed Target temperature COOL H tap A rpm 18 C 64 4 F DRY Dry rotating speed A rpm Lowered by 2 5 C 4 5 F HEAT H tap A rpm 30 31 5 C 86 88 7 F FAN H t...

Page 50: ...F button for 5 to 9 seconds while the unit is not operating Refer to page 384 for detail Note When the ON OFF button is pressed for 10 seconds or more the forced cooling operation is stopped 1 12 4 Ti...

Page 51: ...ure used in place of the inner temperature of the compressor rises abnormally the operating frequency becomes lower or the operation halts 2 The discharge pipe thermistor is used for detecting disconn...

Page 52: ...ommand is regarded as cooling operation R14428 Air conditioner control mode Forced operation mode Forced cooling operation Power transistor test mode Normal operation mode Fan Cooling includes drying...

Page 53: ...nctions Compressor protection input current discharge pipe temperature freeze up protection 3 Determine lower limit frequency The maximum value is set as a lower limit frequency among the frequency lo...

Page 54: ...ency Up Down by D Signal 1 P control The D value is calculated in each sampling time 15 20 seconds and the frequency is adjusted according to its difference from the frequency previously calculated 2...

Page 55: ...the operation is stopped 3 3 3 Four Way Valve Operation Compensation Outline At the beginning of the operation as the four way valve is switched the pressure difference to activate the four way valve...

Page 56: ...B Hz 64 70 65 65 C Hz 88 85 80 80 D seconds 240 120 120 120 500 E seconds 360 200 200 100 200 F seconds 180 470 470 470 sec Time R13528 Hz Frequency C B D E F A Zone Control Stop zone When the temper...

Page 57: ...is defined as operation frequency 2 Hz After this the output frequency is lowered by 2 Hz every second until it reaches the keep zone Keep zone The present maximum frequency goes on Reset zone Limit...

Page 58: ...ries 7 C 44 6 F 5 C 41 F 3 C 37 4 F R16967 Reset zone Indoor heat exchanger thermistor temperature Up zone Keep zone Dropping zone Stop zone 0 C 32 F C B A 13 C 55 4 F Zone Control Stop zone When the...

Page 59: ...ration 5 Fan speed control during forced cooling operation The outdoor fan is controlled as well as normal operation during forced cooling operation 6 Fan speed control during POWERFUL operation The r...

Page 60: ...umulated time have passed since the start of the operation or ending the previous defrosting Conditions for Canceling Defrost The judgment is made with the outdoor heat exchanger temperature L 09 12 c...

Page 61: ...ode Cooling h h h h h h h h h h h h h h h h h Heating h h h h h h h h h h h h h h h h h h h Holding Functions No Functions Starting control Control when the frequency changes Target discharge pipe tem...

Page 62: ...arting Operation Control The electronic expansion valve opening is controlled when the operation starts and prevents superheating or liquid compression 3 11 5 Control when the Frequency Changes When t...

Page 63: ...mode is heating When the following condition is fulfilled the discharge pipe thermistor disconnection is ascertained Discharge pipe temperature 6 C 10 8 F indoor heat exchanger temperature Adjustment...

Page 64: ...umption If the power consumption is below the specified value and the frequency is higher than the specified frequency it is regarded as refrigerant shortage The power consumption is low comparing wit...

Page 65: ...T EYE Operation 64 2 5 POWERFUL Operation 66 2 6 OUTDOOR UNIT QUIET Operation 67 2 7 ECONO Operation 68 2 8 OFF TIMER Operation 69 2 9 ON TIMER Operation 70 2 10 WEEKLY TIMER Operation 71 3 FDXS Serie...

Page 66: ...eat 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 c...

Page 67: ...ween the unit and the remote controller such as a 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...

Page 68: ...Page 20 21 22 Page 21 Page 22 Page 15 16 Page 13 Page 19 OUTDOOR UNIT QUIET operation Cancels the timer setting It cannot be used for the WEEKLY TIMER operation Changes the ON OFF TIMER and WEEKLY TI...

Page 69: ...irculating 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 frost may occur on the outdoor unit and lower the hea...

Page 70: ...once in about every 2 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 condi...

Page 71: ...louvers or fins have reached the desired position is displayed on the LCD The louvers horizontal blades will begin to swing is displayed on the LCD The fins vertical blades will begin to swing and are...

Page 72: ...ddle low High Middle high Middle When the airflow is set to indoor unit quiet operation will start and the noise from the unit will become quieter In indoor unit quiet operation the airflow rate is se...

Page 73: ...lates 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 Note on airflow ra...

Page 74: ...Back to normal operation The air conditioner is in normal operation while the sensor is detecting the movement of people The set temperature is shifted in 3 6 F 2 C steps The air conditioner will ret...

Page 75: ...r may not detect moving objects further than 23ft 7m away Check the application range Sensor detection sensitivity changes according to indoor unit location the speed of passersby temperature range et...

Page 76: ...g 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 the fun...

Page 77: ...nvenient in consideration of your neighbors NOTE Notes on OUTDOOR UNIT QUIET operation This function is available in COOL HEAT and AUTO operation This is not available in FAN and DRY operation POWERFU...

Page 78: ...set temperature is reached Maximum during normal operation Maximum during ECONO operation Time Normal operation ECONO operation The maximum power consumption of the air conditioner is limited by using...

Page 79: ...isplayed on the LCD and day of the week are displayed on the LCD The TIMER lamp goes off is no longer displayed on the LCD is displayed on the LCD blinks 1 Press Press 3 Press again 2 Press until the...

Page 80: ...d on 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 th...

Page 81: ...timer settings up to programs 1 4 Page 23 Page 25 Program 1 77 F 25 C 81 F 27 C ON ON 6 00 8 30 17 30 22 00 OFF OFF ON OFF ON OFF ON OFF ON OFF Program 2 OFF Program 2 Program 3 Program 4 Program 1 77...

Page 82: ...lect the desired day of the week and reservation number 3 Press 4 Press to select the desired mode 5 Press The day of the week and the reservation number of the current day will be displayed 1 to 4 se...

Page 83: ...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 not forget to set the clock on...

Page 84: ...gram 2 Program 3 ON OFF Program 4 OFF ON 77 F 25 C 77 F 25 C 6 00 8 30 17 30 22 00 6 00 8 30 17 30 22 00 81 F 27 C 81 F 27 C Setting Displays 1 Press 3 Press 5 Press 6 Press to complete the setting 2...

Page 85: ...ettings select the reservation number and press The mode is switched to setting mode Go to STEP 4 Setting Displays Normal display Confirmation display 1 Press 2 Press to select the day of the week and...

Page 86: ...be no setting with selecting blank and ON or OFF blink The selected reservation will be deleted The reservation of the selected day of the week will be deleted If there are still other reservations WE...

Page 87: ...8 ARC452A23 To use the remote 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 ope...

Page 88: ...CLOCK button SELECT button Page17 18 QUIET button Page 15 OFF TIMER button Page17 Cancels the timer setting Page17 18 MODE selector button Page11 Open the front cover Selects the operation mode AUTO...

Page 89: ...tioner 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 frost...

Page 90: ...sumes a small amount of electricity even while it is not operating If you are not going to use the air conditioner for a long period for example in spring or autumn turn the breaker off Use the air co...

Page 91: ...t smaller airflow rates the cooling heating effect is also smaller When the airflow is set to indoor unit quiet operation will start and the noise from the unit will become quieter In indoor unit quie...

Page 92: ...RFUL operation there 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 bu...

Page 93: ...ideration of your neighbors Example Using the OUTDOOR UNIT QUIET operation during the night NOTE Notes on OUTDOOR UNIT QUIET operation This function is available in COOL HEAT and AUTO operation This i...

Page 94: ...ir conditioner and other appliances are used at same time This diagram is a representation for illustrative purposes only The maximum running current and power consumption of the air conditioner in EC...

Page 95: ...on the LCD The TIMER lamp lights yellow and setting time are no longer displayed on the LCD and day of the week are displayed on the LCD The TIMER lamp goes off When TIMER is set the present time is...

Page 96: ...n changes the setting rapidly 3 Press again and setting time are displayed on the LCD The TIMER lamp lights yellow Display To cancel ON TIMER operation To combine ON TIMER and OFF TIMER Press and sett...

Page 97: ...11 Outdoor Unit PCB Abnormality 113 4 12 OL Activation Compressor Overload 115 4 13 Compressor Lock 116 4 14 DC Fan Lock 117 4 15 Input Overcurrent Detection 118 4 16 FourWay Valve Abnormality 119 4 1...

Page 98: ...146 5 9 Rotation Pulse Check on the Outdoor Unit PCB 148 5 10 Installation Condition Check 149 5 11 Discharge Pressure Check 150 5 12 Outdoor Fan System Check 150 5 13 Main Circuit Short Check 151 5...

Page 99: ...signal transmission error occurs between the indoor and outdoor units In either case conduct the diagnostic procedure described in the following pages Service Monitor The indoor unit has one green LE...

Page 100: ...FF Check the outdoor temperature Heating operation cannot be used when the outdoor temperature is 24 C 75 2 F or higher and cooling operation cannot be used when the outdoor temperature is below 10 C...

Page 101: ...n 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 normal mode 3 No...

Page 102: ...or the 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...

Page 103: ...beep 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 descriptio...

Page 104: ...bnormality 103 Outdoor Unit E1 Outdoor unit PCB abnormality 113 E5 OL activation compressor overload 115 E6 Compressor lock 116 E7 DC fan lock 117 E8 Input overcurrent detection 118 EA FourWay valve a...

Page 105: ...alfunction Detection The system checks if the circuit works properly within the microcomputer of the indoor unit Malfunction Decision Conditions The system cannot set the internal settings Supposed Ca...

Page 106: ...ge 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 compatibl...

Page 107: ...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 Freeze up protection cont...

Page 108: ...very dirty Is it very dirty Check the air passage Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged NO NO NO Check No 01 Check the indoor heat...

Page 109: ...peration 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 less than 50...

Page 110: ...fan rotate smoothly Does the fan rotate Is the motor power supply voltage 310 340 VDC generated Is the motor control voltage 15 VDC generated Turn off the power supply and rotate the fan by hand Turn...

Page 111: ...mal fan motor operation Malfunction Decision Conditions The detected rotation speed does not reach the demanded rotation speed of the target tap and is less than 50 of the maximum fan motor rotation s...

Page 112: ...n off the power switch before connecting or disconnecting connectors or parts may be damaged Measure the voltage between the red and black lead wires of the fan motor and check if the maximum voltage...

Page 113: ...ng compressor operation Supposed Causes Disconnection of connector Defective thermistor Defective indoor unit PCB Troubleshooting Check No 01 Refer to P 142 C4 Indoor heat exchanger thermistor C9 Room...

Page 114: ...temperature Malfunction Decision Conditions Refrigerant shortage detection I The following conditions continue for 7 minutes 09 12 class Input current input voltage A output frequency B Output frequen...

Page 115: ...the discharge pipe thermistor indoor or outdoor heat exchanger thermistor room or outdoor temperature thermistor Closed stop valve Refrigerant shortage refrigerant leakage Poor compression performance...

Page 116: ...he pipe flare or replace the union Check the power transistor harness for loosening Correct it as required Also replace the cracked pipe Check the pipes for improper contact and correct them as requir...

Page 117: ...n in approximately 10 seconds Outdoor Unit Low voltage detection The voltage detected by the DC voltage detection circuit is below 150 200 V depending on the model The compressor stops if the error oc...

Page 118: ...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 distortion Repeat...

Page 119: ...nit in indoor unit outdoor unit signal transmission is checked whether it is normal Malfunction Decision Conditions The data sent from the outdoor unit cannot be received normally or the content of th...

Page 120: ...the indoor unit outdoor unit connection wires Diagnose the outdoor unit PCB Before you check the LED A cancel the standby electricity saving function by starting fan operation with the remote controll...

Page 121: ...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 outdoor unit PCB Trouble...

Page 122: ...iring 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 code numb...

Page 123: ...Momentary fall of voltage Momentary power failure etc Troubleshooting 09 12 15 18 class Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be dama...

Page 124: ...NO NO YES Turn on the power again Check to see if the unit is grounded Replace the outdoor unit PCB Ground the system The cause can be external factors other than malfunction Investigate the cause of...

Page 125: ...e stop valve Troubleshooting Check No 01 Refer to P 142 Check No 12 Refer to P 144 Check No 13 Refer to P 145 Check No 14 Refer to P 145 R14438 Caution YES NG Discharge pipe thermistor NO OK OK NG NG...

Page 126: ...thout any other error Supposed Causes Compressor locked Compressor harness disconnected Troubleshooting Check No 15 Refer to P 146 Turn off the power Disconnect the harnesses U V and W R14439 Caution...

Page 127: ...ss without any other error Supposed Causes Foreign matter stuck in the fan Defective fan motor Defective outdoor unit PCB Troubleshooting Check No 16 Refer to P 148 R15675 Caution YES YES NO YES NO NO...

Page 128: ...No 18 Refer to P 150 Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged An input overcurrent may result from wrong internal wiring If t...

Page 129: ...g condition continues over 1 10 minutes after operating for 5 10 minutes Cooling Dry room thermistor temp indoor heat exchanger temp 5 C 9 F Heating indoor heat exchanger temp room thermistor temp 5 C...

Page 130: ...gged Reconnect the thermistor s Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged R15824 Refrigerant shortage Water mixed Stop valve Fo...

Page 131: ...r repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Defective discharge pipe thermistor Defective outdoor heat exchanger therm...

Page 132: ...thermistor Refrigerant shortage Four way valve Water mixed Stop valve Check No 01 Check the thermistors Check No 14 Check the refrigerant line Check No 12 Check the electronic expansion valve Replace...

Page 133: ...nger thermistor exceeds the limit Malfunction Decision Conditions The temperature sensed by the outdoor heat exchanger thermistor rises above about 60 65 C 140 149 F The error is cleared when the temp...

Page 134: ...the outdoor unit PCB Replace the electronic expansion valve or the coil Replace the outdoor unit PCB Change the installation location or direction Clean the outdoor heat exchanger Check the installati...

Page 135: ...nsor output converted to voltage value The DC voltage before compressor start up is below 50 V Supposed Causes Broken or disconnected harness Defective outdoor unit PCB Troubleshooting Caution Be sure...

Page 136: ...before the compressor starts The system checks the compressor current right after the compressor starts Malfunction Decision Conditions The supply voltage and the DC voltage is obviously low or high...

Page 137: ...or 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 resistance value between the each 3...

Page 138: ...gh the position detection circuit Malfunction Decision Conditions If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes 09 12 class or 5 minutes 15 18 24 30...

Page 139: ...S 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 electrolytic cap...

Page 140: ...d 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 Electrical co...

Page 141: ...ied based on the compressor running frequency and the input current Malfunction Decision Conditions If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes wit...

Page 142: ...unning frequency and CT detected input current Malfunction Decision Conditions The compressor running frequency is more than A Hz and the CT input current is less than B A If the error repeats the sys...

Page 143: ...t 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 compresso...

Page 144: ...th the power on J3 error is judged if the discharge pipe temperature is lower than the heat exchanger temperature Supposed Causes Disconnection of the connector for the thermistor Defective thermistor...

Page 145: ...mistor s of the following thermistors Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Cooling Outdoor heat exchanger temperature Heating Indoor heat exchange...

Page 146: ...emperature is above A The error is cleared when the radiation fin temperature drops below B To cool the electrical components the outdoor fan starts when the radiation fin temperature rises above C an...

Page 147: ...rature Turn off the power and turn it on again WARNING Replace the outdoor unit PCB Replace the outdoor fan motor Correct the connectors and fan motor lead wire Replace the outdoor unit PCB Clean up t...

Page 148: ...The error is cleared when the radiation fin temperature drops below B If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed...

Page 149: ...ation 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 applied properly on the radiation fin If no...

Page 150: ...essor is running A speed error occurs while the compressor is running An output overcurrent signal is fed from the output overcurrent detection circuit to the microcomputer If the error repeats the sy...

Page 151: ...e power and reconnect the harnesses Turn on the power again and start operation Turn off the power and turn it on again to start the system See if the same error occurs Check the power supply voltage...

Page 152: ...thermistor 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 the...

Page 153: ...tion 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 i...

Page 154: ...valve EV 1 Check to see if the EV connector is correctly connected to the PCB 2 Turn the power off and on again and check to see if the EV generates a latching sound 3 If the EV does not generate a l...

Page 155: ...Cooling Dry No continuity Heating Continuity Replace the outdoor unit PCB Replace the four way valve coil Replace the four way valve Four way valve coil resistance at 1000 2000 W S80 voltage at 220 2...

Page 156: ...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 remov...

Page 157: ...CB If OK in Check No 22 check if there is any solder cracking on the PCB 4 If any solder cracking is found replace the PCB or repair the soldered section If there is no solder cracking replace the PCB...

Page 158: ...VDC 4 Check that the rotation command voltage between the pins 2 4 is 0 15 VDC 5 Keep operation off and power off Connect the connector S70 6 Check whether 2 pulses 0 15 VDC are output at the pins 1 4...

Page 159: ...acles or winds blowing in the opposite direction R17119 NG YES YES YES Is the discharged air short circuited NO NO NO Is the outdoor heat exchanger very dirty Change the installation location or direc...

Page 160: ...the connection pipe deformed Is the stop valve open High Replace the compressor Open the stop valve Replace the pipe installed at the site Clean the dirty air filter or indoor outdoor heat exchanger R...

Page 161: ...between the pins of the DB1 referring to the table below If the resistance is or less than 1 k short circuit occurs on the main circuit 09 12 class Negative terminal of tester positive terminal for di...

Page 162: ...eck No 21 Before this check be sure to check the 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...

Page 163: ...ector Follow the procedure below to measure resistance between the terminals of the power module and the terminals of the compressor with a multi tester Evaluate the measurement results referring to t...

Page 164: ...SiUS091133 Check Service Diagnosis 154 15 18 class 24 30 36 class Power module R16697 R16073 Power module...

Page 165: ...r 213 2 7 Removal of Fan Motor Fan Rotor 217 2 8 Removal of Vertical Blade ASSYs 220 3 Indoor Unit FTXS30 36LVJU 221 3 1 Removal of Air Filters Front Panel 221 3 2 Removal of Front Grille 224 3 3 Remo...

Page 166: ...anels 326 6 2 Removal of Electrical Box 340 6 3 Removal of PCBs 344 6 4 Removal of Fan Motor 347 6 5 Removal of Coils Thermistors 348 6 6 Removal of Sound Blankets 351 6 7 Removal of Compressor 354 7...

Page 167: ...When the ON OFF button is kept pressed for 5 seconds the forced cooling operation is performed for about 15 minutes 2 Remove the air filters 1 Open the front panel to the position where it stops 2 Sl...

Page 168: ...r filter The right and left filters are interchangeable 2 Remove the Titanium apatite photocatalytic air purifying filter ASSY by unfastening the projections from the back of the air filter frame 3 Un...

Page 169: ...Procedure Points 1 Open the front panel over the position where it stops 2 Slide the left rotary shaft to the right and release it When reassembling the front panel fit the right and left rotary shaf...

Page 170: ...ng off all power supplies before disassembling work Step Procedure Points 1 Remove the service cover 1 Remove the screw of the service cover Preparation Remove the front panel according to the Removal...

Page 171: ...hooks at the top The convex marks on the front panel indicate the position of the hooks 3 Pull the upper part of the front grille out and lift the lower part up and then remove the front grille When r...

Page 172: ...izontal blade to the upper position and the small horizontal blade to the lower position Do not put them in the wrong place 2 Unfasten the center shaft while bending the horizontal blade large slightl...

Page 173: ...ight shaft There is a key alignment at the right shaft When reassembling insert the right shaft first while turning After inserting the right shaft first mount the horizontal blade to the center shaft...

Page 174: ...SSYs 1 Detach the pivot from the interlock shaft for vertical blades with a flat screwdriver 2 Remove the interlock rod 3 Unfasten the hooks at the upper 3 positions by pressing them with a flat screw...

Page 175: ...val Procedure 4 Remove the vertical blade ASSY A vertical blade ASSY has 5 fins It is impossible to replace only one fin The vertical blade ASSY is not marked for difference between right and left Ste...

Page 176: ...before disassembling work Step Procedure Points 1 The figure shows the connections of the wire harnesses Preparation Remove the front grille according to the Removal of Front Grille 2 Remove the screw...

Page 177: ...1133 167 Removal Procedure 4 Disconnect the connector for the fan motor S1 5 Disconnect the connector for the swing motors S41 6 Release the harness for the swing motors from the hook Step Procedure P...

Page 178: ...aries by model Be careful not to lose the clip of the thermistor 8 Remove the screw and detach the ground wire 9 Remove the screw of the electrical box 10 Unfasten the hook at the upper far side by pr...

Page 179: ...091133 169 Removal Procedure 11 Lift up the electrical box and pull it out There is a hook also at the lower part of the back When reassembling the electrical box make sure that it is securely fastene...

Page 180: ...ws the appearance of the electrical box Preparation Remove the electrical box according to the Removal of Electrical Box 2 Unfasten the hooks at the upper 2 positions of the shield plate 3 Unfasten th...

Page 181: ...rminal board 1 Remove the screw and remove the terminal board 3 Remove the signal receiver unit 1 Unfasten the 3 hooks 2 Unfasten the hook on the opposite side and lift up the signal receiver unit Ste...

Page 182: ...ver unit 4 Remove the INTELLIGENT EYE sensor PCB 1 Unfasten the 3 hooks and remove the INTELLIGENT EYE sensor PCB 2 Disconnect the connector S26 from the INTELLIGENT EYE sensor PCB Step Procedure Poin...

Page 183: ...signal receiver PCB 2 Disconnect the connector S48 from the signal receiver PCB 6 Remove the display PCB The display PCB is positioned on the rear side of the signal receiver unit 1 The figure shows t...

Page 184: ...display PCB 7 Remove the control PCB 1 Unfasten the lower 2 hooks of the control PCB 2 Lift up the bottom of the control PCB and pull it out The control PCB is also fixed by 2 upper hooks When reasse...

Page 185: ...s S1 DC fan motor S25 INTELLIGENT EYE sensor PCB S26 control PCB S32 indoor heat exchanger thermistor S41 swing motors S46 display PCB S47 signal receiver PCB S48 S49 control PCB Refer to page 14 15 f...

Page 186: ...isassembling work Step Procedure Points 1 Remove the swing motor for vertical blades 1 Lift the indoor unit with a wooden base 2 Remove the screw behind the drain hose and disconnect the drain hose 3...

Page 187: ...a flat screwdriver 5 Remove the swing motor unit 6 Detach the interlock shaft from the swing motor with a flat screwdriver 7 Remove the vertical blade interlock with a flat screwdriver Step Procedure...

Page 188: ...3 Indoor Unit FTXS09 12LVJU Removal Procedure 178 8 Remove the 2 screws 9 Remove the swing motor for vertical blades 10 Disconnect the connector Connector green Step Procedure Points R13573 Screw R103...

Page 189: ...pposite the horizontal blades do not move smoothly or noise may be heard 1 Set the swing motor for the upper blade first connector white 2 Then set the swing motor for the lower blade connector red 3...

Page 190: ...sconnecting the refrigerant piping If the refrigerant piping is disconnected with the compressor operating and the stop valve open air may be sucked in to generate an over pressure in refrigeration cy...

Page 191: ...of the piping fixture at the back of the indoor unit Remove the piping fixture 3 Widen the auxiliary piping 4 Remove the 2 screws on the left side Caution When removing or reassembling the indoor heat...

Page 192: ...driver 6 After unfastening the lower hooks lift up the indoor heat exchanger by its right side When reassembling the indoor heat exchanger make sure that the right hooks upper and lower are fastened 7...

Page 193: ...rning off all power supplies before disassembling work Step Procedure Points 1 Remove the right side plate Preparation Remove the indoor heat exchanger according to the Removal of Indoor Heat Exchange...

Page 194: ...the 2 screws of the fan motor fixing plate 4 Unfasten the hook of the fan motor fixing plate and remove the plate 2 Remove the fan motor 1 Dislocate the fan rotor by sliding it to the right Step Proce...

Page 195: ...motor with approx 5 mm 0 2 inch left 2 Tighten the screw until it stops Then give the screw one more turn 3 Rotate the fan rotor and confirm the fan motor and the fan rotor are installed appropriately...

Page 196: ...m the signal reception When the ON OFF button is kept pressed for 5 seconds the forced cooling operation is performed for about 15 minutes 2 Remove the air filters 1 Open the front panel to the positi...

Page 197: ...rifying filter ASSY by unfastening the projections from the back of the air filter frame The right and left filters are interchangeable 2 Remove the Titanium apatite photocatalytic air purifying filte...

Page 198: ...e front panel further than it stops release both the shafts Slide the front panel from side to side to release each shaft Align the right and left shafts with grooves in turn and insert them to the en...

Page 199: ...pplies before disassembling work Step Procedure Points 1 Remove the service cover 1 Remove the screw and remove the service cover You can remove the front grille without detaching the service cover 2...

Page 200: ...Remove the screw caps with a flat screwdriver 3 Remove the lower 3 screws 4 Unfasten the 3 hooks on the top of the front grille The convex marks on the front panel indicate the position of the hooks S...

Page 201: ...133 191 Removal Procedure 5 Pull the upper part of the front grille out and lift the lower part up and then remove the front grille When reassembling make sure that all the 3 hooks are fastened as the...

Page 202: ...work Step Procedure Points 1 Layout of the parts Preparation Remove the front grille according to the Removal of Front Grille 2 Remove the drip proof plate The shape of the drip proof plate differs by...

Page 203: ...thermistor 1 Cut the clamp 2 Pull out and release the ground wire 3 Pull out the indoor heat exchanger thermistor The position of the indoor heat exchanger thermistor is slightly different depending...

Page 204: ...nect the connection wires on the terminal board Remove the screw and remove the wire retainer 2 Disconnect the connector for the fan motor S1 and release the harness from the hook 3 Disconnect the con...

Page 205: ...rom the hooks 5 Remove the screw of the electrical box 6 Lift up the electrical box from the bottom frame and remove it Fit the back hook of the electrical box to the bottom frame when reassembling St...

Page 206: ...wer supplies before disassembling work Step Procedure Points 1 Remove the signal receiver PCB 1 Unfasten the hooks of the shield plate Preparation Remove the electrical box according to the Removal of...

Page 207: ...S15 18 24LVJU SiUS091133 197 Removal Procedure 4 Remove the screw of the terminal board 5 Remove the terminal board 1 hook at the back 6 Cut the clamp Step Procedure Points R16285 R16286 Terminal boar...

Page 208: ...from the hook When reassembling make sure to hook the harness 8 Push and unfasten the hook of the signal receiver unit 9 Open the signal receiver unit Unfasten the hook and remove the signal receiver...

Page 209: ...nfasten the hook on the right of the signal receiver PCB Then the signal receiver PCB is lifted up 11 Remove the signal receiver PCB 12 Disconnect the connector S48 to control PCB Step Procedure Point...

Page 210: ...he right and then the 2 hooks on the left Remove the INTELLIGENT EYE sensor ASSY 2 Remove the sensor from the shield plate When reassembling set the sensor at the position where it clicks Otherwise th...

Page 211: ...edure 3 Remove the shield plate by unfastening the 2 hooks 4 Disconnect the connector S36 control PCB 3 Remove the display PCB 1 Unfasten the 4 hooks Step Procedure Points R9526 Shield plate rear Hook...

Page 212: ...LVJU Removal Procedure 202 2 Lift up the display PCB 3 Release the harness from the hook 4 Disconnect the connector S49 to control PCB Step Procedure Points R9529 R9530 Hook R9531 S49 3P224121 1 PbF S...

Page 213: ...S091133 203 Removal Procedure 4 Remove the control PCB 1 Unfasten the 3 hooks Lift up and remove the control PCB 2 Pull out the ground wire from the terminal board Step Procedure Points R9517 Hook Hoo...

Page 214: ...the terminals from the terminal board S1 DC fan motor S25 INTELLIGENT EYE sensor PCB S32 indoor heat exchanger thermistor S41 swing motors S46 display PCB S47 signal receiver PCB Refer to page 17 for...

Page 215: ...Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the horizontal blades 1 Hold the indoor unit up with somet...

Page 216: ...r Unit FTXS15 18 24LVJU Removal Procedure 206 3 Remove the horizontal blade Remove both the horizontal blades upper and lower in the same way Step Procedure Points inner left R9538 right Horizontal bl...

Page 217: ...the air outlet ASSYs by pushing the 2 hooks at the back of each The 3 air outlet ASSYs are bound with sealing materials 3 Remove the fan guards 1 Unfasten the 4 lower hooks and the 2 upper hooks and r...

Page 218: ...Removal Procedure 208 4 Remove the swing motors for horizontal blades 1 Release the interlock rod 2 Remove the screw at the rear of the indoor unit 3 Remove the 2 screws front and rear Step Procedure...

Page 219: ...24LVJU SiUS091133 209 Removal Procedure 4 Pull out the drain hose then remove the swing motor unit 5 Remove the screw at the center 6 Remove the 2 pivots Step Procedure Points R16298 Drain hose Swing...

Page 220: ...he horizontal blades do not move smoothly or noise may be heard 1 Set the swing motor of the upper blade first connector white 2 Then set the swing motor of the lower blade connector red 3 Fix both sw...

Page 221: ...door Unit FTXS15 18 24LVJU SiUS091133 211 Removal Procedure 2 Remove the interlock rod 2 with pliers 3 Remove the interlock rod 1 Step Procedure Points R9553 Interlock rod 2 R9554 R9555 Interlock rod...

Page 222: ...or Unit FTXS15 18 24LVJU Removal Procedure 212 4 Remove the 2 screws 5 Remove the swing motor for the vertical blade 6 Disconnect the connector Step Procedure Points R9556 R9557 Swing motor for vertic...

Page 223: ...ution In pump down work be sure to stop the compressor before disconnecting the refrigerant piping If the refrigerant piping is disconnected with the compressor operating and the stop valve open air m...

Page 224: ...24LVJU Removal Procedure 214 2 Remove the piping fixture 1 Detach the indoor unit from the installation plate 2 Push the bottom frame 3 Release the piping fixture Step Procedure Points R16524 R16309 B...

Page 225: ...the indoor heat exchanger 1 Widen the auxiliary piping 2 Remove the 2 screws on the left side Caution When removing or reassembling the indoor heat exchanger be sure to wear gloves or wrap the indoor...

Page 226: ...ocedure 216 3 Push the hook on the right side and unfasten it 4 Lift up and remove the indoor heat exchanger Press the right side of the indoor heat exchanger and lift it up from the left side Step Pr...

Page 227: ...r 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the right side plate 1 Remove the 2 screws 2 Lift the right side plate and remove it...

Page 228: ...r Unit FTXS15 18 24LVJU Removal Procedure 218 2 Remove the fan motor fixing plate 3 Release the fan motor harness from the hook 4 Loosen the screw of the fan rotor Step Procedure Points R16973 R16304...

Page 229: ...Insert the fan motor with approx 5 mm 0 2 inch left 2 Tighten the screw until it stops Then give the screw one more turn 3 Rotate the fan rotor and confirm the fan motor and the fan rotor are installe...

Page 230: ...nutes or more after turning off all power supplies before disassembling work Step Procedure Points Unfasten the 2 hooks of each vertical blade ASSY Remove the 3 vertical blade ASSYs Each vertical blad...

Page 231: ...the signal reception When the ON OFF button is kept pressed for 5 seconds the forced cooling operation is performed for about 15 minutes 2 Remove the air filters 1 Open the front panel to the position...

Page 232: ...air purifying filter ASSY by unfastening the projections from the back of the air filter frame The 3 filters are interchangeable 2 Remove the Titanium apatite photocatalytic air purifying filter from...

Page 233: ...e front panel further than it stops release both the shafts Slide the front panel from side to side to release each shaft Align the right and left shafts with grooves in turn and insert them to the en...

Page 234: ...plies before disassembling work Step Procedure Points 1 Remove the service cover 1 Remove the screw and remove the service cover You can remove the front grille without detaching the service cover 2 R...

Page 235: ...225 Removal Procedure 2 Remove the screw caps with a flat screwdriver 3 Remove the lower 3 screws 4 Remove the 3 front grille fixtures The Illustration shows the left fixture Step Procedure Points R16...

Page 236: ...it FTXS30 36LVJU Removal Procedure 226 5 Unfasten the 4 hooks on the top of the front grille The convex marks on the front panel indicate the position of the hooks Step Procedure Points R9490 R9486 Ho...

Page 237: ...33 227 Removal Procedure 6 Pull the upper part of the front grille out and lift the lower part up and then remove the front grille When reassembling make sure that all the 4 hooks are fastened as they...

Page 238: ...pplies before disassembling work Step Procedure Points 1 Layout of the parts Preparation Remove the front grille according to the Removal of Front Grille 2 Remove the drip proof plate 1 Remove the scr...

Page 239: ...he indoor heat exchanger thermistor Be careful not to lose the clip of the thermistor 4 Remove the electrical box 1 Remove the 4 screws and disconnect the connection wires on the terminal board Remove...

Page 240: ...Procedure 230 2 Disconnect the connector for the fan motor S1 and release the harness from the hook 3 Release the ferrite core 4 Disconnect the connector for the swing motors S41 Step Procedure Points...

Page 241: ...rom the hooks 6 Remove the screw of the electrical box 7 Lift up the electrical box from the bottom frame and remove it Fit the back hook of the electrical box to the bottom frame when reassembling St...

Page 242: ...minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the signal receiver PCB 1 Unfasten the hooks of the shield plate 2 Open the shield plate...

Page 243: ...FTXS30 36LVJU SiUS091133 233 Removal Procedure 4 Remove the screw of the terminal board 5 Remove the terminal board 1 hook at the back 6 Cut the clamp Step Procedure Points R9511 R9512 Terminal board...

Page 244: ...from the hook When reassembling make sure to hook the harness 8 Push and unfasten the hook of the signal receiver unit 9 Open the signal receiver unit Unfasten the hook and remove the signal receiver...

Page 245: ...nfasten the hook on the right of the signal receiver PCB Then the signal receiver PCB is lifted up 11 Remove the signal receiver PCB 12 Disconnect the connector S48 control PCB Step Procedure Points R...

Page 246: ...e right and then the 2 hooks on the left Remove the INTELLIGENT EYE sensor ASSY 2 Remove the sensor from the shield plate When reassembling set the sensor at the position where it clicks Otherwise the...

Page 247: ...LVJU SiUS091133 237 Removal Procedure 3 Remove the shield plate by unfastening the 2 hooks 4 Disconnect the connector S36 control PCB Step Procedure Points R9526 Shield plate rear Hook INTELLIGENT EYE...

Page 248: ...door Unit FTXS30 36LVJU Removal Procedure 238 3 Remove the display PCB 1 Unfasten the 4 hooks 2 Lift up the display PCB 3 Release the harness from the hook Step Procedure Points R9528 Display PCB R952...

Page 249: ...or S49 control PCB 4 Remove the control PCB 1 Unfasten the 3 hooks Lift up and remove the control PCB 2 Pull out the ground wire from the terminal board Step Procedure Points R9531 S49 3P224121 1 PbF...

Page 250: ...e terminals from the terminal board S1 DC fan motor S25 INTELLIGENT EYE sensor PCB S32 indoor heat exchanger thermistor S41 swing motors S46 display PCB S47 signal receiver PCB Refer to page 17 for de...

Page 251: ...sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the horizontal blades 1 Hold the indoor unit up with a piece of wood...

Page 252: ...33 Indoor Unit FTXS30 36LVJU Removal Procedure 242 4 Release the shafts in turn Removing order right left inner right inner left Step Procedure Points right Horizontal blade R9535 R9536 left R9537 inn...

Page 253: ...ade Remove both the horizontal blades upper and lower in the same way 2 Remove the fan guards 1 Remove the sealing material horizontal 2 Remove the sealing material vertical Also remove the other seal...

Page 254: ...ASSY by pushing the 2 hooks at the back Remove the center and right air outlet ASSY likewise 4 Unfasten the 4 lower hooks and the 2 upper hooks and remove the fan guard Remove the other 2 fan guards...

Page 255: ...ure 3 Remove the swing motors for horizontal blades 1 Release the interlock rod 2 Pull out the drain hose then remove the swing motor unit 3 Remove the screw at the center Step Procedure Points R9546...

Page 256: ...f you set the connectors or motors opposite the horizontal blades do not move smoothly or the noise may be heard 1 Set the swing motor for the upper blade first connector white 2 Then set the swing mo...

Page 257: ...36LVJU SiUS091133 247 Removal Procedure 4 Remove the swing motor for vertical blades 1 Remove the link cover 2 Remove the interlock rod 2 with pliers Step Procedure Points R9552 Link cover R9553 Inte...

Page 258: ...FTXS30 36LVJU Removal Procedure 248 3 Remove the interlock rod 1 4 Remove the 2 screws 5 Remove the swing motor for the vertical blade Step Procedure Points R9555 Interlock rod 1 R9556 R9557 Swing mo...

Page 259: ...Indoor Unit FTXS30 36LVJU SiUS091133 249 Removal Procedure 6 Disconnect the connector Step Procedure Points R9558...

Page 260: ...Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Loosen the screw of the fan motor from the air outlet 2...

Page 261: ...Removal Procedure 3 Unfasten the hook at the front and remove the fan motor fixing plate 4 Release the harness from the hook and remove the screw of the motor mounting plate Step Procedure Points R95...

Page 262: ...the fan motor with approx 5 mm 0 2 inch left 2 Tighten the screw until it stops Then give the screw one more turn 3 Rotate the fan rotor and confirm the fan motor and the fan rotor are installed appr...

Page 263: ...ndoor Unit FTXS30 36LVJU SiUS091133 253 Removal Procedure 7 Remove the vibration absorber When reassembling engage the vibration absorber completely Step Procedure Points R9567 R9566 Vibration absorbe...

Page 264: ...ution In pump down work be sure to stop the compressor before disconnecting the refrigerant piping If the refrigerant piping is disconnected with the compressor operating and the stop valve open air m...

Page 265: ...091133 255 Removal Procedure 2 Remove the piping fixture 1 Detach the indoor unit from the installation plate 2 Push the bottom frame 3 Release the piping fixture Step Procedure Points R9571 R9572 Bot...

Page 266: ...he indoor heat exchanger 1 Widen the auxiliary piping 2 Remove the 2 screws on the left side Caution When removing or reassembling the indoor heat exchanger be sure to wear gloves or wrap the indoor h...

Page 267: ...Procedure 3 Push the hook on the right side and unfasten it 4 Lift up and remove the indoor heat exchanger Press the right side of the indoor heat exchanger and lift it up from the left side Step Pro...

Page 268: ...more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the right side plate 1 Remove the 2 screws 2 Lift the right side plate and remove it 2 Remove the fa...

Page 269: ...frame 1 Insert the fan motor with approx 5 mm 0 2 inch left 2 Tighten the screw until it stops Then give the screw one more turn 3 Rotate the fan rotor and confirm the fan motor and the fan rotor are...

Page 270: ...utes or more after turning off all power supplies before disassembling work Step Procedure Points Unfasten the 2 hooks of each vertical blade ASSY Remove the 3 vertical blade ASSYs Each vertical blade...

Page 271: ...after turning off all power supplies before disassembling work Step Procedure Points 1 Appearance features Take care not to cut your finger by the fins of the outdoor heat exchanger 2 Remove the panel...

Page 272: ...Removal Procedure 262 2 Remove the 3 screws and lift the top panel 3 Remove the drip proof cover 4 Remove the 4 screws and remove the discharge grille Step Procedure Points Top panel R16978 Drip proof...

Page 273: ...263 Removal Procedure The discharge grille has 4 hooks 5 Remove the 8 screws of the front panel 6 Unfasten the hooks Pull and remove the front panel The front panel has 4 hooks Step Procedure Points R...

Page 274: ...he nut of the outdoor fan 2 Remove the outdoor fan When reassembling align the mark of the outdoor fan with the D cut section of the motor shaft 3 Release the outdoor temperature thermistor Step Proce...

Page 275: ...Unit RXS09 12LVJU SiUS091133 265 Removal Procedure 4 Disconnect the connector for the fan motor S70 5 Release the fan motor lead wire from the hook Step Procedure Points S70 R16987 Fan motor lead wire...

Page 276: ...nit RXS09 12LVJU Removal Procedure 266 6 Remove the screw and remove the fan motor fixing frame When reassembling fit the lower hooks into the bottom frame Step Procedure Points Fan motor fixing frame...

Page 277: ...o as not to be entangled with the outdoor fan 8 Remove the 4 screws and remove the fan motor 4 Remove the right side panel When reassembling pass the connecting wires through the conduit and secure th...

Page 278: ...l Procedure 268 2 Remove the 4 screws on the right side panel 3 Remove the screw near the stop valves 4 Unfasten the hook on the rear side When reassembling make sure to fit the hook Step Procedure Po...

Page 279: ...12LVJU SiUS091133 269 Removal Procedure 5 Lift up the right side panel and remove it When reassembling make sure to fit the hook 6 Lift up the guard net and remove it Step Procedure Points Hook R1699...

Page 280: ...e Points 1 Disconnect the connector for the overload protector S40 Preparation Remove the outer panels and disconnect the connector for the fan motor according to the Removal of Outer Panels Fan Motor...

Page 281: ...VJU SiUS091133 271 Removal Procedure 4 Disconnect the relay connector for the compressor 5 Disconnect the connector for the electronic expansion valve coil S20 6 Cut the clamp Step Procedure Points R1...

Page 282: ...eful not to lose the clip for the thermistor 8 Release the discharge pipe thermistor Be careful not to lose the clip for the thermistor 9 Lift and remove the electrical box Step Procedure Points Outdo...

Page 283: ...pplies before disassembling work Step Procedure Points 1 Remove the main PCB and the forced operation button PCB You can remove the main PCB when you disconnect the lead wires on the terminal board wi...

Page 284: ...l out the forced operation button PCB Disconnect the connector S110 to remove the forced operation button PCB Be careful of a sharp protrusion at the back of the forced operation button PCB 5 Cut the...

Page 285: ...Unit RXS09 12LVJU SiUS091133 275 Removal Procedure 6 Release the harness 7 Cut the clamps at the 2 locations 8 Disconnect the connector for the filter PCB S10 Step Procedure Points R16934 R16935 S10...

Page 286: ...emoval Procedure 276 9 Disconnect the connector for the forced operation button PCB S100 10 Disconnect the connector for the filter PCB HL3 HN3 11 Release the harnesses from the hook Step Procedure Po...

Page 287: ...9 12LVJU SiUS091133 277 Removal Procedure 12 Release the harness for the outdoor temperature thermistor 13 Remove the 6 screws 14 Unfasten the 4 hooks and remove the main PCB Step Procedure Points R11...

Page 288: ...0 electronic expansion valve coil S40 overload protector S70 fan motor S80 four way valve coil S90 thermistors S100 forced operation button PCB 2 Remove the filter PCB 1 Release the harnesses from the...

Page 289: ...Outdoor Unit RXS09 12LVJU SiUS091133 279 Removal Procedure 3 Release the harnesses from the hook 4 Release the harnesses from the 2 hooks 5 Remove the screw Step Procedure Points R16944 R17001 R17002...

Page 290: ...tdoor Unit RXS09 12LVJU Removal Procedure 280 6 Unfasten the 2 hooks 7 Lift and pull out the filter PCB 8 Layout of the filter PCB Refer to page 22 for detail Step Procedure Points Filter PCB R17003 R...

Page 291: ...inutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the reactor Preparation Remove the outer panels according to the Removal of Outer Panels Fa...

Page 292: ...Remove the partition plate 1 Remove the 2 screws 2 The partition plate has 2 hooks on the lower side Lift and pull the partition plate to remove When reassembling fit the lower hooks into the bottom f...

Page 293: ...after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the sound blanket top Since the piping ports are torn easily remove the sound blankets carefully 2 Untie...

Page 294: ...S091133 Outdoor Unit RXS09 12LVJU Removal Procedure 284 4 Pull out the sound blanket inner 5 Pull out the sound blanket bottom Step Procedure Points Sound blanket inner R11887 Sound blanket bottom R11...

Page 295: ...Valve Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Pull out the electronic expansion valve coil 2 Re...

Page 296: ...Caution From the viewpoint of global environment protection do not discharge the refrigerant gas in the atmosphere Make sure to collect all the refrigerant gas Cautions for restoration 1 Restore the p...

Page 297: ...onnect and restore 2 Cut pipes on the main unit with a tube cutter in order to make it easy to disconnect 6 Heat up the brazed part and withdraw the piping with pliers Note Never use a metal saw to cu...

Page 298: ...t protection do not discharge the refrigerant gas in the atmosphere Make sure to collect all the refrigerant gas Cautions for restoration 1 Restore the piping by non oxidation brazing 2 It is required...

Page 299: ...the circuit When withdrawing the pipes be careful not to pinch them firmly with pliers The pipes may get deformed Provide a protective sheet or a steel plate so that the brazing flame cannot influence...

Page 300: ...ning off all power supplies before disassembling work Step Procedure Points 1 Remove the 4 screws and remove the top panel Take care not to cut your finger by the fins of the outdoor heat exchanger 2...

Page 301: ...ocedure 3 Remove the 6 screws of the front panel 4 Unfasten the right side hooks 5 Unfasten the left side hooks Remove the front panel When reassembling fit the left side of the front panel first Step...

Page 302: ...LVJU Removal Procedure 292 6 Remove the screw of the stop valve cover 7 Pull down the stop valve cover to unfasten the hooks and remove it The stop valve cover has 6 hooks Step Procedure Points Stop v...

Page 303: ...efore disassembling work Step Procedure Points 1 Remove the drip proof cover Preparation Remove the top panel and the front panel according to the Removal of Outer Panels 2 Disconnect the connector fo...

Page 304: ...oval Procedure 294 4 Release the fan motor lead wire from the groove and the 2 hooks of the partition plate 5 Remove the nut of the outdoor fan Nut size M6 Step Procedure Points R16764 R16796 R16797 O...

Page 305: ...lign the mark of the outdoor fan with the D cut section of the motor shaft 7 Remove the 2 screws of the fan motor fixing frame 8 Pull up the fan motor fixing frame to unfasten the 2 hooks at the botto...

Page 306: ...91133 Outdoor Unit RXS15 18LVJU Removal Procedure 296 10 Open the hook and release the fan motor lead wire 11 Remove the 4 screws and remove the fan motor Step Procedure Points R16954 Hook Fan motor R...

Page 307: ...work Step Procedure Points 1 Remove the 2 screws of the protection plate When reassembling pass the connecting wires through the conduit and secure them with a lock nut 2 Remove the protection plate...

Page 308: ...crews of the conduit mounting plate 5 Remove the conduit mounting plate 6 Remove the 2 screws and remove the ground wire 7 Pull out the outdoor temperature thermistor Step Procedure Points R16780 Cond...

Page 309: ...ve the 4 screws of the right side panel 9 Unfasten the hooks and remove the right side panel When reassembling insert the upper hook and the 2 lower hooks back into place 10 Cut the clamp Step Procedu...

Page 310: ...at exchanger thermistor 12 Disconnect the connector for the fan motor S70 13 Release the clamp from the partition plate The ferrite core of the fan motor lead wire has a clamp Step Procedure Points Ou...

Page 311: ...91133 301 Removal Procedure 14 Release the fan motor lead wire from the groove and the 2 hooks of the partition plate 15 Disconnect the connector for the overload protector S40 Step Procedure Points R...

Page 312: ...r Unit RXS15 18LVJU Removal Procedure 302 16 Pull out the clamp 17 Disconnect the connector for the electronic expansion valve coil S20 18 Pull out the clamp 2 locations Step Procedure Points R16803 R...

Page 313: ...20 Disconnect the connector for the four way valve coil S80 When reassembling insert the clamps of harnesses as below When reassembling connect the connectors in the following order 1 S80 2 S20 3 S40...

Page 314: ...edure 304 21 Pull out the clamp 22 Disconnect the relay connector for the compressor 23 Release the harness of the relay connector from the wire saddle 24 Pull out the clamp from the partition plate S...

Page 315: ...ermistors S90 26 Pull out the clamp When reassembling pass the thermistor harness under the harnesses HL2 blue HN2 white from the filter PCB When reassembling insert the clamp as below 27 Remove the w...

Page 316: ...3 Outdoor Unit RXS15 18LVJU Removal Procedure 306 28 Pull out the clamp 3 locations When reassembling insert the 2 clamps into the bottom of the electrical box Step Procedure Points R16768 R16769 R167...

Page 317: ...Outdoor Unit RXS15 18LVJU SiUS091133 307 Removal Procedure 29 Remove the screw 30 Remove the electrical box Step Procedure Points R16771 R16772 Electrical box...

Page 318: ...wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the main PCB S12 for HL4 HN4 on filter PCB 1 Disconnect the connector S12 and...

Page 319: ...insert the clamp as below 4 Disconnect the connectors HN3 and HL3 HL3 for HL2 on filter PCB HN3 for HN2 on filter PCB 5 Pull out the clamp When reassembling insert the clamp as below Step Procedure P...

Page 320: ...SiUS091133 Outdoor Unit RXS15 18LVJU Removal Procedure 310 6 Remove the 2 upper screws 7 Remove the lower screw 8 Lift the main PCB ASSY Step Procedure Points R16811 R16812 R16813 Main PCB ASSY...

Page 321: ...ews 11 Unfasten the 2 hooks Refer to page 24 for detail 12 Remove the main PCB S10 S12 filter PCB S20 electronic expansion valve coil S40 overload protector S70 fan motor S80 four way valve coil S90 t...

Page 322: ...ews on the bottom of the electrical box 2 Remove the radiation fin 3 Remove the filter PCB 1 Remove the ground wire screw 2 Pull out the terminals from the terminal board 1 black 2 white 3 red Step Pr...

Page 323: ...Outdoor Unit RXS15 18LVJU SiUS091133 313 Removal Procedure 3 Pull out the clamp 4 Release the harnesses from the groove 5 Remove the 2 screws Step Procedure Points R16816 R16817 R16818...

Page 324: ...SiUS091133 Outdoor Unit RXS15 18LVJU Removal Procedure 314 6 Unfasten the 3 hooks of the filter PCB ASSY 7 Remove the screw 8 Unfasten the 2 hooks Step Procedure Points R16961 R14367 R14368 R16964...

Page 325: ...Outdoor Unit RXS15 18LVJU SiUS091133 315 Removal Procedure 9 Remove the filter PCB Refer to page 24 for detail Step Procedure Points R14370...

Page 326: ...al of Sound Blankets Thermistors Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the partition pl...

Page 327: ...Procedure 2 Remove the sound blankets 1 Remove the sound blanket top upper 2 Remove the sound blanket top lower 3 Remove the sound blanket back Step Procedure Points R16962 Sound blanket top upper So...

Page 328: ...ng ports are torn easily remove the sound blankets carefully 5 Remove the sound blanket inner 6 Release the discharge pipe thermistor Be careful not to lose the clip for the thermistor Step Procedure...

Page 329: ...Outdoor Unit RXS15 18LVJU SiUS091133 319 Removal Procedure 7 Cut the clamp and pull out the outdoor heat exchanger thermistor Step Procedure Points Outdoor heat exchanger thermistor R5292 Clamp...

Page 330: ...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 the gaskets affected by heat Keep below 120 C...

Page 331: ...ic Expansion Valve Procedure Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Pull out the electronic expansion val...

Page 332: ...her parts that are heated by the gas brazing Warning If the refrigerant gas leaks during work immediately ventilate the room If refrigerant gas is exposed to flames toxic gas may be generated Caution...

Page 333: ...ressor Procedure Warning Be sure 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 lead w...

Page 334: ...ic gas may be generated Warning If the refrigerant oil in the compressor catches fire have a wet cloth prepared to extinguish the fire immediately Caution For global environmental protection do not di...

Page 335: ...zing machine 1 Disconnect the brazed part where is easy to disconnect and restore 2 Cut pipes on the main unit with a tube cutter in order to make it easy to disconnect Note Never use a metal saw to c...

Page 336: ...er turning off all power supplies before disassembling work Step Procedure Points 1 Appearance features 2 Remove the suction grille The hooks are secured in the clearances of the outdoor heat exchange...

Page 337: ...3 Remove the suction grille 3 Remove the top panel 1 Remove the 4 screws on the back and the screw on the left side 2 Remove the 2 screws on the front and the screw on the right side panel Step Proced...

Page 338: ...1133 Outdoor Unit RXS24LVJU Removal Procedure 328 3 Lift the top panel and remove it 4 Remove the front panel 2 This screw is M5 3 16 1 Remove the 5 screws Step Procedure Points R16580 R17006 Front Pa...

Page 339: ...Outdoor Unit RXS24LVJU SiUS091133 329 Removal Procedure 2 Slide the front panel 2 downward to unfasten the hook 3 Remove the front panel 2 Step Procedure Points R16582 R16583 Hook...

Page 340: ...24LVJU Removal Procedure 330 5 Remove the right side panel 1 Remove the 2 screws Slide the right side panel downward to unfasten the 2 hooks on the rear side Step Procedure Points R16728 Right side pa...

Page 341: ...e panel 6 Remove the front panel 1 Remove the discharge grille and the 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 342: ...harge grille downward to unfasten the 2 hooks at the top 4 Remove the discharge grille 5 Remove the nut of the outdoor fan Nut size M8 6 Remove the 2 screws on the partition plate 1 Step Procedure Poi...

Page 343: ...333 Removal Procedure 7 Remove the screw at the bottom left of the front 8 Remove the screw at the bottom of the left side 9 Remove the screw at the bottom of the rear side Step Procedure Points Part...

Page 344: ...RXS24LVJU Removal Procedure 334 10 Lift the front panel 1 to unfasten the hook 11 Remove the front panel 1 Be sure to detach the front panel 1 carefully so as not to deform it Step Procedure Points H...

Page 345: ...dure 7 Remove the rear panel 1 Remove the 2 screws and remove the shield plate ASSY 2 Release the clamps of the connection wire 3 Remove the screws and detach the connection wires Step Procedure Point...

Page 346: ...l Procedure 336 4 Remove the screw on the partition plate 2 5 Slide the partition plate 2 to the left and remove it 6 Remove the 3 screws on the wire fixing plate Step Procedure Points R17008 Rear pan...

Page 347: ...on 8 Release the holder of the outdoor temperature thermistor The holder is secured in the clearances of the outdoor heat exchanger fins 9 Release the harness of the outdoor temperature thermistor fro...

Page 348: ...emoval Procedure 338 10 Remove the 3 screws on the rear panel 11 Remove the screw on the bottom frame 12 Remove the screw on the stop valve mounting plate Step Procedure Points Rear panel R16699 R1670...

Page 349: ...Outdoor Unit RXS24LVJU SiUS091133 339 Removal Procedure 13 Lift the rear panel upward to unfasten the 2 hooks 14 Remove the rear panel Step Procedure Points Hook Hook R16702 R16703...

Page 350: ...rning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the screw on the stop valve mounting plate 2 Remove the screw...

Page 351: ...move the 2 screws to detach the ground wires 4 Disconnect the connector for the fan motor S70 5 Release the fan motor lead wire from the 5 hooks When reassembling do not use these 2 hooks Step Procedu...

Page 352: ...side S20 electronic expansion valve coil S40 overload protector S80 four way valve coil S90 thermistors 7 The compressor lead wire is fixed on the partition plate 1 with a clamp 8 Release the clamp o...

Page 353: ...l Procedure 9 Disconnect the relay connector for the compressor 10 Slide the electrical box to the left to unfasten the hook on the right side of the box 11 Lift up the electrical box and remove it St...

Page 354: ...g work Step Procedure Points 1 Disconnect the connectors S52 S102 from the service monitor PCB Preparation Remove the electrical box according to the Removal of Electrical Box 2 Detach the 4 clamps wi...

Page 355: ...oval Procedure 4 Unfasten the hook on the right 5 Open the terminal board 6 Disconnect the harnesses from the terminal board 1 Black 2 White 3 Red L1 Black L2 Brown N1 White N2 Blue Step Procedure Poi...

Page 356: ...he reactor HR1 HR2 HR1 White HR2 Blue The harness for HR2 has a ferrite core 8 Remove the 3 screws of the main PCB 9 Release the 4 hooks 10 Lift up and remove the main PCB Refer to page 26 for detail...

Page 357: ...er screws first Then remove the 2 upper screws Preparation Remove the electrical box according to the Removal of Electrical Box Be sure to remove the lower screws first If the top screws are removed f...

Page 358: ...sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the electronic expansion valve coil 1 Pull the electronic expansion va...

Page 359: ...emove the four way valve coil 3 Remove the thermistors 1 Pull out the outdoor heat exchanger thermistor 2 Slightly open the sound blanket outer Step Procedure Points Four way valve coil R6458 Outdoor...

Page 360: ...33 Outdoor Unit RXS24LVJU Removal Procedure 350 3 Remove the sound blanket upper top 4 Remove the discharge pipe thermistor Step Procedure Points Sound blanket upper top R7012 Discharge pipe thermisto...

Page 361: ...wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Open the sound blanket outer 2 Remove the sound blanket top upper The sound blanket...

Page 362: ...ly push the partition plate 1 to the left for easy work 4 Remove the sound blanket outer 5 Remove the sound blanket top lower The sound blanket is fragile Carefully pass the discharge pipe through it...

Page 363: ...val Procedure 6 Open the sound blanket inner The sound blanket is fragile Be careful of the notches of the compressor mount 3 locations 7 Remove the sound blanket inner Step Procedure Points Sound bla...

Page 364: ...rocedure Warning Be sure 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 Pull out the 3 lead wires 3 R...

Page 365: ...Outdoor Unit RXS24LVJU SiUS091133 355 Removal Procedure 4 Remove the 2 nuts Disconnect the piping referring to page 381 Step Procedure Points R9472...

Page 366: ...Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Appearance features 2 Remove the suction grille The hooks are secured in...

Page 367: ...3 Remove the top panel 1 Remove the 9 screws and remove the top panel 4 Remove the right side panel 1 Remove the 5 screws 2 Slide the right side panel downward to unfasten the 2 hooks on the back sid...

Page 368: ...91133 Outdoor Unit RKS30 36LVJU RXS30 36LVJU Removal Procedure 358 3 Remove the right side panel 5 Remove the front panel 2 1 Remove the screw Step Procedure Points Hook R16622 R16623 R16624 Front pan...

Page 369: ...359 Removal Procedure 2 Slide the front panel 2 downward to unfasten the 3 hooks 3 Remove the front panel 2 The insulation sheet is inserted between the front panel 2 and the electrical box Step Proce...

Page 370: ...grille and the 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 grille and remove it 3 Remove the outdoor fan fixing nut...

Page 371: ...SiUS091133 361 Removal Procedure 4 Remove the 3 screws on the partition plate 1 5 Remove the 2 screws at the bottom of the front 6 Remove the screw at the bottom of the left side Step Procedure Points...

Page 372: ...6LVJU RXS30 36LVJU Removal Procedure 362 7 Remove the screw at the bottom of the back side 8 The front panel 1 has a hook on its front Lift the front panel 1 9 Remove the front panel 1 Step Procedure...

Page 373: ...ar panel 1 Cut the clamp 2 Remove the 3 screws 3 4 Remove the wire fixing plate Remove the 7 screws of the terminal board and ground wires Detach the connection wires and the power supply wires Step P...

Page 374: ...Removal Procedure 364 5 Remove the 2 screws on the partition plate 2 6 Lift up slightly and remove the partition plate 2 7 Remove the screw on the bottom frame Step Procedure Points R17013 Partition p...

Page 375: ...valve mounting plate 9 Lift the rear panel upward to unfasten the 2 hooks 10 Push the hooks of the outdoor temperature thermistor holder from inner side of the rear panel and detach it Step Procedure...

Page 376: ...SiUS091133 Outdoor Unit RKS30 36LVJU RXS30 36LVJU Removal Procedure 366 11 Remove the rear panel Step Procedure Points Rear panel R16640...

Page 377: ...it for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the screw on the stop valve mounting plate 2 Remove the screw on the partition p...

Page 378: ...en reassembling do not use these 2 hooks 6 Disconnect the connectors of the front side S20 electronic expansion valve coil S80 four way valve coil S90 thermistors Cooling only models have no harness f...

Page 379: ...dure 7 The compressor lead wire is fixed on the partition plate 1 with a clamp 8 Pull out the clamp and release the compressor lead wire 9 Disconnect the relay connector for the overload protector and...

Page 380: ...e clamp of the thermistor harness from the hole of the electrical box 12 Slide the electrical box leftward to unfasten the hook on the right side of the box 13 Lift up the electrical box and remove it...

Page 381: ...f all power supplies before disassembling work Step Procedure Points 1 Remove the cover Preparation Remove the electrical box according to the Removal of Electrical Box 2 Disconnect the connectors S52...

Page 382: ...screws of the terminal board and the ground wire 5 Unfasten the hook on the right 6 Open the terminal board 7 Disconnect the harnesses 1 Black 2 White 3 Red L1 Black L2 Brown N1 White N2 Blue Step Pr...

Page 383: ...nesses for the reactor HR1 HR2 HR1 white HR2 blue The harness for HR2 has a ferrite core 9 Remove the 3 screws of the main PCB 10 Release the 4 hooks 11 Lift up and remove the main PCB Refer to page 2...

Page 384: ...Preparation Remove the electrical box according to the Removal of Electrical Box 2 3 Remove the 2 lower screws first Then remove the 2 upper screws Be sure to remove the lower screws first If the top...

Page 385: ...xpansion valve coil out 2 Remove the thermistors You can remove the thermistor ASSY with the electrical box on 1 Disconnect S90 from the electrical box main PCB 2 Release the thermistor harness from t...

Page 386: ...3 Remove the sound blanket top upper 4 Remove the discharge pipe thermistor 5 At the back side open the outdoor temperature thermistor holder Step Procedure Points Sound blanket top upper R16920 R963...

Page 387: ...133 377 Removal Procedure 6 Release the outdoor temperature thermistor 3 Remove the four way valve coil 1 Remove the screw 2 Remove the four way valve coil Step Procedure Points Outdoor temperature th...

Page 388: ...all power 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 t...

Page 389: ...ve the sound blanket outer 5 Open the sound blanket inner 6 Remove the sound blanket inner The sound blanket is fragile Be careful of the notches of the compressor mount 4 locations Step Procedure Poi...

Page 390: ...edure Warning Be sure 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 Pull out the 3 lead wires U red...

Page 391: ...e 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 the gaskets affected by heat Keep below 120 C 248 F Wr...

Page 392: ...ation 384 3 Trial Operation 386 4 Field Settings 387 4 1 Model Type Setting 387 4 2 Temperature Display Switch 387 4 3 When 2 Units are Installed in 1 Room 388 4 4 Facility Setting Jumper and Switch C...

Page 393: ...nd the gas stop valve 2 Carry out forced cooling operation 3 After 5 to 10 minutes close the liquid stop valve with a hexagonal wrench 4 After 2 to 3 minutes close the gas stop valve and stop the forc...

Page 394: ...ss the forced cooling operation ON OFF button SW1 on the outdoor unit Command frequency 09 12 class 58 Hz 15 18 class 66 Hz 24 class 31 Hz 30 36 class 55 Hz End The forced cooling operation ends when...

Page 395: ...091133 385 Trial Operation and Field Settings 15 18 class 24 30 36 class 1 2 3 Screwdriver R16616 Forced cooling operation ON OFF button SW1 Push LED A SW4 ON A B C D S102 SW1 S2 Forced cooling operat...

Page 396: ...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 te...

Page 397: ...the heat pump model or cooling only model Make the setting 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 s...

Page 398: ...ent addresses Both the indoor unit PCB and the wireless remote controller need alteration Indoor Unit PCB Cut the address setting jumper JA on the control PCB Wireless Remote Controller Cut the addres...

Page 399: ...such as a residence or office Detail You can expand the operation range to 10 C 14 F by cutting the jumper or turning on switch on the outdoor unit PCB If the outdoor temperature falls to 18 C 0 4 F...

Page 400: ...ting the jumper sets the indoor fan tap to the highest position 09 12 15 18 class 5 Use the indoor unit at the highest level of airflow rate 24 30 36 class 4 5 Jumper Settings For the location of the...

Page 401: ...r and the diode bridge Applying the grease should be implemented in accordance with the following instruction Note There is a possibility of failure and smoke emission in case of poor heat radiation W...

Page 402: ...SiUS091133 Appendix 392 Part 9 Appendix 1 Piping Diagrams 393 1 1 Indoor unit 393 1 2 Outdoor Unit 396 2 Wiring Diagrams 399 2 1 Indoor Unit 399 2 2 Outdoor Unit 401...

Page 403: ...OSS FLOW FAN FIELD PIPING 1 4 CuT M FAN MOTOR FIELD PIPING 3 8 CuT 3 8 CuT REFRIGERANT FLOW COOLING HEATING 4D074606 THERMISTOR ON HEAT EXCH INDOOR UNIT 5 16 CuT DISTRIBUTOR HEAT EXCHANGER CROSS FLOW...

Page 404: ...AN MOTOR HEADER 1 2 CuT REFRIGERANT FLOW COOLING HEATING FIELD PIPING 1 4 CuT FIELD PIPING 5 8 CuT THERMISTOR ON HEAT EXCH 4D074608 CROSS FLOW FAN HEAT EXCHANGER 1 2 CuT 5 8 CuT HEADER REFRIGERANT FLO...

Page 405: ...rams SiUS091133 395 Appendix FDXS09 12LVJU 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 406: ...TDOOR UNIT HEAT EXCHANGER 5 16CuT 7 9 5 16CuT 7 9 5 16CuT 7 9 5 16CuT 7 9 CAPILLARY TUBE 1 5 16CuT 7 9 5 16CuT 7 9 CAPILLARY TUBE 2 5 16CuT 7 9 REFRIGERANT FLOW 5 16CuT 7 9 CAPILLARY TUBE 3 COOLING HE...

Page 407: ...MISTOR 4 WAY VALVE ON HEATING MUFFLER WITH FILTER ELECTRONIC EXPANSION VALVE LIQUID LINE STOP VALVE GAS LINE STOP VALVE DISCHARGE PIPE THERMISTOR OUTDOOR UNIT HEAT EXCHANGER 3 8CuT 5 16CuT HEADER 5 16...

Page 408: ...LTER DISTRIBUTOR DC FAN MOTOR M CAPILLARY TUBE 3 8CuT PROPELLER FAN 5 8CuT 5 8CuT 3 8CuT MUFFLER FIELD PIPING LIQUID 3 8 CuT 3 8CuT 5 8CuT 5 8CuT 5 8CuT 5 16CuT REFRIGERANT FLOW COMPRESSOR COOLING FIE...

Page 409: ...LOT LAMP MAGNETIC RELAY FAN MOTOR SWING MOTOR PRINTED CIRCUIT BOARD THERMISTOR CONNECTOR OPERATION SWITCH VARISTOR TERMINAL STRIP PROTECTIVE GROUND 3D058246F 1 X1M PCB1 PCB3 S46 S49 2 H1 BLK 1 1 BLK 1...

Page 410: ...M PPL R1T INDOOR 130 C BLU R2T M1F WIRELESS REMOTE CONTROLLER TRANSMISSION CIRCUIT NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN H1P H3P...

Page 411: ...V1 V2 V3 X1M Y1E Y1S Z1C Z2C Z3C GR VARISTOR TERMINAL STRIP ELECTRONIC EXPANSION VALVE COIL REVERSING SOLENOID VALVE COIL FERRITE CORE PROTECTIVE GROUND GROUND 3D074402A FIELD WIRING INDOOR L803 IPM...

Page 412: ...NTED CIRCUIT BOARD REVERSING SOLENOID VALVE COIL TERMINAL STRIP FIXED PLATE PROTECTIVE GROUND GROUND 3D074292 S80 4 1 L1R GRN Z6C GRN N 1 YLW N 1 Z1C X1M Z8C FU3 GRN 7 BLU WHT RED M1F E1 N 4 E2 L1 HR2...

Page 413: ...Wiring Diagrams SiUS091133 403 Appendix...

Page 414: ...this product conforms tot he applicable standards and is suitable for use in the region where the product will be used This statement does not purport to exclude restrict or modify the application of...

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