Daikin SUPER MULTI NX FDXS09LVJU Service Manual Download

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Service
Manual

Inverter Pair

FTXS-L Series
FDXS-L Series

SiUS091133

[Applied Models]



Inverter Pair : Cooling Only



Inverter Pair : Heat Pump

Summary of Contents for SUPER MULTI NX FDXS09LVJU

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: ...ing Only Indoor Unit FTXS30LVJU FTXS36LVJU Outdoor Unit RKS30LVJU RKS36LVJU Heat Pump Indoor Unit FTXS09LVJU FDXS09LVJU FTXS12LVJU FDXS12LVJU FTXS15LVJU FTXS18LVJU FTXS24LVJU FTXS30LVJU FTXS36LVJU Outdoor Unit RXS09LVJU RXS12LVJU RXS15LVJU RXS18LVJU RXS24LVJU RXS30LVJU RXS36LVJU ...

Page 3: ...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 RXS15 18LVJU 23 2 3 RXS24LVJU RK X S30 36LVJU 25 Part 4 Function and Control 27 1 Main Functions 28 1 1 Temperature Control 28 1 2 Frequency Principle 28 1 3 Airflow Direction Control FTXS Series 30 1 4 Fan Speed Control for Indoor Unit 32 1 5 Program Dry Operation 33 1 6 Automatic ...

Page 4: ...55 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 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 Series 77 3 1 Re...

Page 5: ...ity 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 Sensor Abnormality 09 12 Class Only 131 4 22 CT or Related Abnormality 24 30 36 Class Only 132 4 23 Thermistor or Related Abnormality Outdoor Unit 134 4 24 Electrical Box Temperature Rise 136 4 25 Ra...

Page 6: ...emoval 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 5 Removal of Horizontal Blades Swing Motors 241 3 6 Removal of Fan Motor 250 3 7 Removal of Indoor Heat Exchanger 254 3 8 Removal of Fan Rotor 258 3 9 Removal of Vertical Blade ASSYs 260 4 Outdoor U...

Page 7: ...moval 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 Forced Cooling Operation 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 Ju...

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

Page 9: ...ostbite 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 system Doing so can cause a serious accident or an equipment failure Check to see if the parts and wires are mounted and connected properly and if the connections at the soldered or crimped terminal...

Page 10: ...ches 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 with other electrical appliances as it may cause an electrical shock or fire Use an exclusive power circuit for the equipment Insufficient circuit amperage capacity may cause an electrical shock or fire...

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: ...lity 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 Treatment of Outdoor Heat Exchanger Indoor Unit Quiet Operation NIGHT QUIET Mode Automatic Flexibility Multi Split Split Type Compatible Indoor Unit OUTDOOR UNIT QUIET Operation Manual H P C O Compatible I...

Page 13: ...y 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 Compatible Indoor Unit NIGHT QUIET Mode Automatic H P C O Compatible Indoor Unit OUTDOOR UNIT QUIET Operation Manual Flexible Power Supply Correspondence INTELLIGENT EYE Operation Chargeless 32 8 ft 3...

Page 14: ...ter 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 Heat Exchanger NIGHT QUIET Mode Automatic Flexibility Multi Split Split Type Compatible Indoor Unit OUTDOOR UNIT QUIET Operation Manual H P C O Compatible Indoor Unit INTELLIGENT EYE Operation Flexib...

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

Page 16: ...ashable 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 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D in mm 11 5 8 31 1 2 8 7 16 295 800 215 11 5 8 31 1 2 8 7 16 295 800 215 Packaged Dimensions H W D in mm 10 13 16 34 1 4 14 7 ...

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 Control Microcomputer Control Dimensions H W D in mm 13 3 8 41 5 16 9 3 4 340 1 050 248 13 3 8 41 5 16 9 3 4 340 1 050 248 Packaged Dimensions H W D in mm 13 45 11 16 16 7 8 331 1 160 429 13 45 11 16 ...

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 Packaged Dimensions H W D in mm 13 45 11 16 16 7 8 331 1 160 429 Weight Mass Lbs kg 31 14 Gross Weight Gross Mass Lbs kg 46 21 Sound Pressure Level H M L SL dB A 51 44 37 34 48 42 37 34 Sound Power Le...

Page 19: ...roof 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 in mm 13 3 8 47 1 4 9 7 16 340 1 200 240 13 3 8 47 1 4 9 7 16 340 1 200 240 Packaged Dimensions H W D in mm 12 13 16 51 9 16 16 7 8 325 1 310 429 12 13 16 51 9 16 16 7 8 325 1 310 429 Weight Mass Lbs...

Page 20: ...Filter 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 97 4 98 5 97 4 98 5 97 4 98 5 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D in mm 13 3 8 47 1 4 9 7 16 340 1 200 240 13 3 8 47 1 4 9 7 16 340 1 200 240 Packaged Di...

Page 21: ...ated 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 Microcomputer Control Dimensions H W D in mm 7 7 8 27 9 16 24 7 16 200 700 620 7 7 8 27 9 16 24 7 16 200 700 620 Packaged Dimensions H W D in mm 10 13 16 36 5 16 30 1 4 274 923 768 10 13 16 36 5 16 30 1...

Page 22: ...ing 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 RXS15 18LVJU 23 2 3 RXS24LVJU RK X S30 36LVJU 25 ...

Page 23: ...or 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 failure recovery function auto restart Refer to page 390 for detail 11 LED A LED for service monitor green 12 FU1 F1U Fuse 3 15 A 250 V 13 V1 Varistor 1 S48 Connector for control PCB 1 S49 Connector ...

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: ...nit 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 3EB86013 1 S26 ...

Page 26: ...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 failure recovery function auto restart Refer to page 390 for detail 11 LED A LED for service monitor green 12 FU1 F1U Fuse 3 15 A 250 V 13 V1 Varistor 1 S48 Connector for control PCB 1 S49 Connector for...

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: ...33 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 3P227885 1 ...

Page 29: ...tor 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 failure recovery function auto restart Refer to page 390 for detail 10 LED A LED for service monitor green 11 FU1 F1U Fuse 3 15 A 250 V 12 V1 V1TR Varistor 1 S1 Connector for control PCB 2 SW1 S1W Force...

Page 30: ...Unit 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 2P084375 1 RTH1 1 ...

Page 31: ...ter 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 outdoor temperature outdoor heat exchanger discharge pipe 7 S100 Connector for forced operation button PCB 8 HL3 HN3 Connector for filter PCB 9 HR2 Connector for reactor 10 U V W Connector for compre...

Page 32: ...nector 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 S80 HL3 HN3 V1 LED A U VW HR2 SW1 S110 3P255755 2 ...

Page 33: ...rced 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 S40 Connector for overload protector 5 S70 Connector for fan motor 6 S80 Connector for four way valve coil 7 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 8 H...

Page 34: ...Printed 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 LED A U V W HN3 HL3 S12 V1 ...

Page 35: ...for 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 HR2 Connector for reactor 10 E1 E2 Connector for ground wire 11 U V W Connector for compressor 12 FU1 Fuse 30 A 250 V 13 FU2 FU3 Fuse 3 15 A 250 V 14 V2 V3 V5 V9 V100 Varistor 1 S52 S102 Connector f...

Page 36: ...ng 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 S101 V5 S80 V9 V2 AC1 HR2 S102 SW1 3P169059 1 LED A SW4 B S52 ...

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 Control 43 3 3 Controls at Mode Changing Start up 45 3 4 Discharge Pipe Temperature Control 46 3 5 Input Current Control 47 3 6 Freeze up Protection Control 48 3 7 Heating Peak cut Control 48 3 8 Outdoo...

Page 38: ...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 target temperature appropriately adjusted for the indoor unit and the temperature detected by room temperature thermistor 1 2 Frequency Principle Main Control Parameters The compressor is frequency controlled during normal operation The target ...

Page 39: ...eep 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 Description 1 The supplied AC power source is converted into the DC power source for the present 2 The DC power source is reconverted into the three phase AC power source with variable frequency When the freq...

Page 40: ...to 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 swing process for cooling dry heating and fan Frequency Functions Low Four way valve operation compensation Refer to page 45 High Compressor protection function Refer to page 46 Discharge pipe tempe...

Page 41: ...zontal 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 blades louvers move downward 3 The vertical blades fins move from the left to the right 4 The horizontal blades louvers move upward COMFORT AIRFLOW Operation The horizontal blades louvers are controlled...

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 according to the indoor heat exchanger temperature and the difference between the room thermistor temperature and the target temperature Note 1 During POWERFUL operation the fan rotates at H tap 50 r...

Page 43: ...s 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 temperature X Thermostat OFF point Y Thermostat ON point Z 24 C 75 2 F or more Room thermistor temperature at start up X 2 5 C 4 5 F X 0 5 C 0 9 F or Y 0 5 C 0 9 F zone B continues for 10 min 23 5 C 7...

Page 44: ...llows 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 OFF point of cooling or heating operation 4 During initial operation Tr Ts Cooling operation Tr Ts Heating operation FTXS series Ex When the target temperature is 25 C 77 F Cooling 23 C 73 4 F Thermos...

Page 45: ...ept 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 on page 28 for detail B A OFF ON C Room thermistor temperature target temperature 1 5 C 2 7 F R14452 Cooling 0 5 C 0 9 F Dry 0 5 C 0 9 F Cooling 2 0 C 3 6 F Dry 2 5 2 0 C 4 5 3 6 F B A OFF ON C Room...

Page 46: ...matically 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 comfortable sleeping conditions and also conserves electricity Cooling Heating R14453 TIMER operation NIGHT SET Mode ON Target temperature 0 5 C 0 9 F temperature shift Operation stops at the set hou...

Page 47: ...rom 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 COOL HEAT DRY or AUTO operation This function can only be set when the unit is running Pressing the ON OFF button on the remote controller cancels the function This function and POWERFUL operation can...

Page 48: ...ons 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 target temperature Cooling Dry 1 2 C 1 8 3 6 F higher Heating 2 C 3 6 F lower Auto according to the operation mode at that time In FAN operation the fan speed is reduced by 60 rpm Others For dry operation...

Page 49: ...x 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 tap A rpm AUTO Same as cooling heating in POWERFUL operation The target temperature is kept unchanged R13571 Target temp Fan A rpm 18 C 64 4 F H tap Set tap 20 minutes It should be the lower limit of ...

Page 50: ...FF 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 Titanium Apatite Photocatalytic Air Purifying Filter This filter combines the Air Purifying Filter and Titanium Apatite Photocatalytic Deodorizing Filter as a single highly effective filter The filter ...

Page 51: ...ture 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 disconnection of the discharge pipe thermistor 3 Indoor Heat Exchanger Thermistor 1 The indoor heat exchanger thermistor is used for controlling the target discharge pipe temperature The system sets the tar...

Page 52: ...command 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 Stop indoor unit OFF Preheating operation Discharging from capacitor Stop Air conditioner control mode Forced operation mode Forced cooling operation Power transistor test mode Normal operation mode ...

Page 53: ...unctions 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 lower limits of the following function Pressure difference upkeep 4 Determine prohibited frequency There is a certain prohibited frequency such as a power supply frequency For Heat Pump Model 1 Determi...

Page 54: ...uency 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 I control If the operating frequency does not change for more than a certain fixed time the frequency is adjusted according to the D value When the D value is low the frequency is lowered When the D ...

Page 55: ...r 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 is acquired by having output frequency which is more than a certain fixed frequency for a certain fixed time Detail Starting Conditions 1 When starting the compressor for heating 2 When the operatio...

Page 56: ...5 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 temperature reaches the stop zone the compressor stops Dropping zone The upper limit of frequency decreases Keep zone The upper limit of frequency is kept Up zone The upper limit of frequency increases Res...

Page 57: ...y 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 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 than a certain level dependin...

Page 58: ...eries 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 temperature reaches the stop zone the compressor stops Dropping zone The upper limit of frequency decreases Keep zone The upper limit of frequency is kept Up zone The upper limit of frequency increas...

Page 59: ...eration 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 rotation speed of the outdoor fan is increased during POWERFUL operation 7 Fan speed control during indoor outdoor unit quiet operation The rotation speed of the outdoor fan is reduced by the command ...

Page 60: ...cumulated 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 class 15 18 class 24 class 30 36 class A minutes 15 28 15 44 15 38 15 38 B Hz 76 55 39 39 C Hz 86 90 62 62 D seconds 50 60 60 60 E seconds 60 120 120 120 F seconds 480 340 530 530 G seconds 60 50 60 6...

Page 61: ...mode 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 temperature control Control for disconnection of the discharge pipe thermistor High discharge pipe temperature control Pressure equalizing control Opening limit control Starting control Control when the...

Page 62: ...tarting 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 the target discharge pipe temperature control is active if the target frequency is changed to a specified value in a certain time period the target discharge pipe temperature control is canceled and 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 when 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 ...

Page 64: ...sumption 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 with that in the normal operation when refrigerant is insufficient and refrigerant shortage is detected by checking power consumption II Detecting by discharge pipe temperature If the discharge pipe tem...

Page 65: ...NT 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 Series 77 3 1 Remote Controller 77 3 2 AUTO DRY COOL HEAT FAN Operation 79 3 3 Adjusting the Airflow Rate 81 3 4 POWERFUL Operation 82 3 5 OUTDOOR UNIT QUIET Operation 83 3 6 ECONO Operation 84 3 7 OFF TI...

Page 66: ...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 customer may fault either the room air conditioner or its installation work when it is actually due to improper handling The installation work and the handing over of the unit can only be considered c...

Page 67: ...tween 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 Selects the airflow rate setting POWERFUL operation Displays the current settings In this illustration each section is shown with all its displays on for the purpose of explanation Changes the temper...

Page 68: ...1 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 TIMER settings Page 11 Selects the operation mode AUTO DRY COOL HEAT FAN ECONO operation Adjusting the airflow direction COMFORT AIRFLOW and INTELLIGENT EYE operation WEEKLY TIMER operation WEEKLY butt...

Page 69: ...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 may occur on the outdoor unit and lower the heating capacity In that case the system switches into defrosting operation to take away the frost During defrosting operation hot air does not flow out of indoor unit This air conditioner cools the roo...

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 conditioner for a long period for example in spring or autumn turn the breaker off Use the air conditioner in the following conditions MODE COOL HEAT DRY Operating conditions If operation is continued out...

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 displayed on the LCD The louvers and fins move in turn To cancel 3 D airflow press either or again The louvers or fins will stop moving In the 3 D airflow the louvers and fins move in turn or is no ...

Page 72: ...iddle 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 set to a weak level In DRY operation the airflow rate setting is not variable NOTE COOL and DRY operation HEAT operation FAN operation COMFORT AIRFLOW Upper limit Lower limit Stop operation Stop operat...

Page 73: ...ulates 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 rate setting At smaller airflow rates the cooling heating effect is also smaller NOTE CAUTION Always use a remote controller to adjust the angles of the louvers and fins If you attempt to move the louv...

Page 74: ...n 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 return to normal operation when the sensor detects the movement of people again INTELLIGENT EYE operation is useful for energy saving Energy saving operation If no presence detected in the room for 20 m...

Page 75: ...or 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 etc The sensor also mistakenly detects pets sunlight fluttering curtains and light reflected off of mirrors as passersby INTELLIGENT EYE operation will not go on during POWERFUL operation NIGHT SET mod...

Page 76: ...ng 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 function of whichever button is pressed last POWERFUL operation can only be set when the unit is running Pressing causes the settings to be canceled and is no longer displayed on the LCD POWERFUL operat...

Page 77: ...onvenient 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 POWERFUL operation and OUTDOOR UNIT QUIET operation cannot be used at the same time Priority is given to the function of whichever button is pressed last Even the operation is stopped using the remote contr...

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 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 purposes only The max...

Page 79: ...displayed 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 time setting reaches the point you like Display NOTE Notes on TIMER operation When TIMER is set the present time is not displayed Once you set ON OFF TIMER the time setting is kept in the memory The ...

Page 80: ...ed 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 the 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 of the week are displayed on the LCD The TIMER lam...

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 F 25 C 81 F 27 C ON 6 00 8 30 17 30 22 00 ON OFF Program 3 Program 4 OFF Program 2 Program 1 77 F 25 C 81 F 27 C 81 F 27 C ON 8 00 10 00 19 00 21 00 ON OFF Program 3 Program 4 Up to 4 reservations p...

Page 82: ...elect 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 settings can be made per day Pressing changes the reservation number and the day of the week The day of the week and reservation number will be set and blink Pressing changes or setting in sequence In ...

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 the remote controller first The day of the week ON OFF TIMER mode time and set temperature only for ON TIMER mode can be set with WEEKLY TIMER Other settings for ON TIMER are based on the settings ju...

Page 84: ...ogram 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 Press to confirm the day of the week to be copied 4 Press to select the destination day of the week is displayed on the LCD and WEEKLY TIMER operation is activated NOTE Note on COPY MODE The entire r...

Page 85: ...settings 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 the reservation number to be confirmed 3 Press to exit confirming mode Press while is displayed on the LCD Display will be no longer displayed on the LCD The TIMER lamp goes off To reactivate the WE...

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 WEEKLY TIMER operation will be activated This function can be used for deleting reservations for each day of the week It can be used while confirming or setting reservations Be sure to direct the remot...

Page 87: ...e8 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 operate Do not drop the remote controller Do not get it wet The maximum distance for communication is approximately 13ft 4m TEMPERATURE adjustment buttons Displays the current settings In this illustrat...

Page 88: ...8 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 DRY COOL HEAT FAN Changes the ON OFF TIMER settings TIMER CANCEL button OUTDOOR UNIT QUIET operation ...

Page 89: ...itioner 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 may occur on the outdoor unit and lower the heating capacity In that case the system switches into defrosting operation to take away the frost During defrosting operation hot air does not flow out of...

Page 90: ...nsumes 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 conditioner in the following conditions Outdoor temperature 50 115 F 10 46 C Indoor temperature 64 90 F 18 32 C Indoor humidity 80 max Outdoor temperature 5 75 F 15 24 C Indoor temperature 50 86 F 10 3...

Page 91: ...At 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 quiet operation the airflow rate is set to a weak level In DRY operation the airflow rate setting is not variable Auto Indoor unit quiet Middle low Low High Middle high Middle NOTE Note on airflow rate s...

Page 92: ...ERFUL 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 button is pressed last POWERFUL Operation can only be set when the unit is running Pressing the operation stop button causes the settings to be canceled and is no longer displayed on the LCD POWERFUL o...

Page 93: ...sideration 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 is not available in FAN and DRY operation POWERFUL operation and OUTDOOR UNIT QUIET operation cannot be used at the same time Priority is given to the function of whichever button is pressed last If o...

Page 94: ...air 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 ECONO operation vary with the connecting outdoor unit Running current and power consumption Maximum during normal operation Maximum during ECONO operation Normal operation ECONO operation From start up...

Page 95: ...d 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 not displayed Once you set ON OFF TIMER the time setting is kept in the memory The memory is canceled when remote controller batteries are replaced When operating the unit via the ON OFF TIMER the ac...

Page 96: ...on 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 setting time are no longer displayed on the LCD and day of the week are displayed on the LCD The TIMER lamp goes off A sample setting for combining the 2 timers is shown below Example Present time 23 00 ...

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 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 Sensor Ab...

Page 98: ...k 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 14 Capacitor Voltage Check 152 5 15 Power Module Check 153 ...

Page 99: ...a 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 LED LED A on the control PCB When the microcomputer works in order the LED A blinks 1 2 Outdoor Unit The outdoor unit has one green LED LED A on the PCB When the microcomputer works in order the LED A ...

Page 100: ...OFF 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 50 F Diagnose with remote controller indication 94 The unit operates but does not cool or does not heat Check for wiring and piping errors in the connection between the indoor unit and outdoor unit C...

Page 101: ...on 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 Not all the error codes are displayed When you cannot find the error code try the check method 2 Refer to page 92 No Code No Code No Code 1 00 13 C7 25 UA 2 U4 14 A3 26 UH 3 L5 15 H8 27 P4 4 E6 16 H9 2...

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 number does not long beep Both the left side and right side number correspond with the error code The numbers indicated when you hear the long beep are the error code Refer to page 94 4 Press the MO...

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 description Refer to page 94 8 Press the MODE button to exit from the diagnosis mode The display means the trial operation mode Refer to page 386 for trial operation 9 Press the ON OFF button twice to return t...

Page 104: ...abnormality 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 abnormality 119 F3 Discharge pipe temperature control 121 F6 High pressure control in cooling 123 H0 Compressor system sensor abnormality 125 H6 Position sensor abnormality 128 H8 DC voltage current s...

Page 105: ...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 internal settings Supposed Causes Wrong models interconnected Defective indoor unit PCB Disconnection of connector Reduction of power supply voltage ...

Page 106: ...age 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 compatible models Correct the power supply Replace the indoor unit PCB 1 Completed Completed Correct the power supply Replace the indoor unit PCB 1 Completed Be sure to turn off the power switch before connec...

Page 107: ...n 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 control During cooling operation the indoor heat exchanger temperature is below 0 C 32 F Heating peak cut control During heating operation the indoor heat exchanger temperature is above 60 65 C 140 149 F...

Page 108: ...t 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 exchanger thermistor YES YES R15715 YES YES NO Caution Provide sufficient air passage Clean the air filter Clean the indoor heat exchanger Replace the indoor unit PCB Replace the thermistor As descr...

Page 109: ...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 less than 50 of the maximum fan motor rotation speed Supposed Causes Layer short inside the fan motor winding Breaking of wire inside the fan motor Breaking of the fan motor lead wires Defective capacitor of the ...

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 the power on and start operation Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Check No 02 Check the output of the fan motor connector R14...

Page 111: ...rmal 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 speed Supposed Causes Reduction of power supply voltage Layer short inside the fan motor winding Breaking of wire inside the fan motor Breaking of the fan motor lead wires Defective capacitor of the f...

Page 112: ...rn 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 reaches the rated voltage Check No 04 Check Hall IC Is there an output Check the fan motor voltage Voltage as rated Start operation Does the fan rotate Turn off the power supply and rotate the fan by...

Page 113: ...ing 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 temperature thermistor YES R15717 NO Check No 01 Check the thermistor resistance value YES NO Caution Correct the connection Replace the thermistor Replace the indoor unit PCB Normal Normal Check th...

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 frequency C 15 18 24 30 36 class Input current D output frequency E Output frequency F Refrigerant shortage detection II The following conditions continue for 80 seconds Opening of the electronic expansion ...

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 of compressor Defective electronic expansion valve L Cooling room thermistor temperature indoor heat exchanger temperature 4 0 C 7 2 F outdoor heat exchanger temperature outdoor temperature 4 0 C 7 ...

Page 116: ...the 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 required Replace the cracked pipe Replace the electronic expansion valve Replace the defective thermistor s Completed Refrigerant shortage error again Oil oozing at internal piping Stop valve closed Compre...

Page 117: ...on 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 occurs and restarts automatically after 3 minute standby Over voltage detection An over voltage signal is fed from the over voltage detection circuit to the microcomputer The compressor stops if the er...

Page 118: ...r 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 a few times Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Replace the indoor unit PCB Turn on the power again System restarted Error again with...

Page 119: ...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 su...

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 controller Wait at least for 7 sec after turning on the power Replace the connection wires between the indoor unit and the outdoor unit Is LED A blinking Properly insulated Is there any disturbance Is there ...

Page 121: ...d 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 Troubleshooting R7185 Caution NO YES Turn off the power and turn it on again Error again Replace the outdoor unit PCB Be sure to turn off the power switch before connecting or disconnecting connectors or pa...

Page 122: ...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 code numbers 2P01234 for example of the indoor and outdoor unit PCB with the Parts List Match the compatible models Change for the correct PCB Replace the indoor unit PCB or the outdoor unit PCB OK Matched co...

Page 123: ...e 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 damaged NO YES YES R16910 YES NO NO Replace the outdoor unit PCB 2 Ground the system Zero cross signal abnormality Replace the outdoor unit PCB 1 Replace the harness Check to see if the outdoor unit is g...

Page 124: ...S 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 noise Error again Grounded Before you check the LED A cancel the standby electricity saving function by starting fan operation with the remote controller Wait at least for 7 sec after turning on the...

Page 125: ...ve 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 OK NG OK Refrigerant shortage Water mixed Stop valve Insert the thermistor in position Replace the discharge pipe thermistor Replace the electronic expansion valve or the coil Refer to the refrigeran...

Page 126: ...ithout 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 NO YES YES NO NO YES Check No 15 Check with the inverter checker Turn off the power and reconnect the harnesses Turn on the power again and restart the system Precaution before turning on the power a...

Page 127: ...ass 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 YES NO Turn on the power Rotate the fan Check No 16 Check the rotation pulse input on the outdoor unit PCB Turn off the power and reconnect the connector Remove the foreign matters Replace the outdo...

Page 128: ...k 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 the system is interrupted by an input overcurrent after the wires have been disconnected and reconnected for part replacement check the wiring again R14440 NO YES YES NO Start operation and measure th...

Page 129: ...ng 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 9 F If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Disconnection of fourway valve coil Defective fourway val...

Page 130: ...ogged 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 Four way valve coil disconnected loose Harness out of connector Any thermistor disconnected Check No 01 Check the thermistors Check No 14 Check the refrigerant line Check No 13 Check the four way valve...

Page 131: ...or 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 thermistor or outdoor temperature thermistor Defective electronic expansion valve or coil Refrigerant shortage Defective fourway valve Water mixed in refrigerant Defective stop valve Defective outdoor uni...

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 the defective thermistor s Replace the electronic expansion valve or the coil Refer to the refrigerant line check procedure Replace the outdoor unit PCB Be sure to turn off the power switch before co...

Page 133: ...anger 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 temperature drops below about 50 C 122 F Supposed Causes The installation space is not large enough Dirty outdoor heat exchanger Defective outdoor fan motor Defective stop valve Defective electronic expa...

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 installation space NG OK OK NG NG OK OK OK NG NG Check No 19 Check the outdoor fan Check No 18 Check the discharge pressure Check No 12 Check the electronic expansion valve Check No 01 Check the outdoor heat e...

Page 135: ...ensor 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 to turn off the power switch before connecting or disconnecting connectors or parts may be damaged NO R11712 YES Turn off the power and turn it on again YES NO Replace the harness Replace the outdoo...

Page 136: ...e 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 The compressor current does not run when the compressor starts Supposed Causes Disconnection of reactor Disconnection of compressor harness Defective outdoor unit PCB Defective compressor ...

Page 137: ...r 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 terminals of the compressor with tester Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged 10 Ω or less between each terminal Check the ...

Page 138: ...ugh 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 36 class without any other error Supposed Causes Disconnection of the compressor relay cable Defective compressor Defective outdoor unit PCB Start up failure caused by the closed stop valve Input vol...

Page 139: ...ES 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 capacitor voltage Electrical components or compressor harnesses connected as specified Replace the outdoor unit PCB Replace the compressor Correct the power supply or replace the outdoor unit PCB Reconn...

Page 140: ...ed 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 components or compressor harnesses connected as specified Replace the outdoor unit PCB Replace the compressor Correct the power supply or replace the outdoor unit PCB Reconnect the electrical component...

Page 141: ...fied 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 without any other error Supposed Causes Defective outdoor unit PCB Troubleshooting Replace the outdoor unit PCB Caution Be sure to turn off the power switch before connecting or disconnecting connectors...

Page 142: ...running 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 system is shut down Reset condition Continuous run for about 60 minutes without any other error Supposed Causes Defective power module Broken or disconnected wiring Defective reactor Defective outdoor u...

Page 143: ...ct 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 compressor Capacitor charged when the indoor unit or outdoor unit main relay turns on Rising with increasing frequency Correct the power supply or replace the outdoor unit PCB Inverter checker Part No 1225477...

Page 144: ...ith 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 corresponding to the error code Defective heat exchanger thermistor in the case of J3 error outdoor heat exchanger thermistor in cooling operation or indoor heat exchanger thermistor in heating oper...

Page 145: ...rmistor s of the following thermistors Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Cooling Outdoor heat exchanger temperature Heating Indoor heat exchanger temperature Replace the indoor heat exchanger thermistor Replace the outdoor unit PCB Error displayed again on remote controller Indoor heat exchanger thermistor functioning Check No 01 Check the t...

Page 146: ...temperature 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 and stops when it drops below B Supposed Causes Defective outdoor fan motor Short circuit Defective radiation fin thermistor Disconnection of connector Defective outdoor unit PCB A B C 09 12 class 98 C...

Page 147: ...erature 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 the radiation fin Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Radiation fin dirty Check No 19 Check the outdoor fan or related Above A Er...

Page 148: ...A 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 Causes Defective outdoor fan motor Short circuit Defective radiation fin thermistor Disconnection of connector Defective outdoor unit PCB Silicon grease is not applied properly on the radiation fin ...

Page 149: ...lation 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 not apply the silicon grease See Note Silicon grease Part No 1172698 Replace the outdoor unit PCB Clean up the radiation fin Be sure to turn off the power switch before connecting or disconnecting conn...

Page 150: ...ressor 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 system is shut down Reset condition Continuous run for about 11 minutes 09 12 class or 5 minutes 15 18 24 30 36 without any other error Supposed Causes Poor installation condition Closed stop valve Def...

Page 151: ...he 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 Monitor the power supply voltage discharge and suction pressures and other factors for a long term Possible causes Momentary fall of power supply voltage Compressor overload Short circuit Keep on usi...

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 thermistor and measure the resistance Temperature C F Resistance k 20 4 197 8 15 5 148 2 10 14 112 1 5 23 85 60 0 32 65 93 5 41 51 14 10 50 39 99 15 59 31 52 20 68 25 02 25 77 20 00 30 86 16 10 35 95 13 ...

Page 153: ...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 is operating If NG in step 1 Defective PCB Replace the PCB If NG in step 2 Defective Hall IC Replace the fan motor If OK in both steps 1 and 2 Replace the PCB 7 6 5 4 3 2 1 S1 R12404 Motor power suppl...

Page 154: ...n 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 latching sound in the above step 2 disconnect the connector and check the continuity using a tester 4 Check the continuity between the pins 1 6 2 6 3 6 and 4 6 If there is no continuity between the pi...

Page 155: ...l 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 220 240 VAC with compressor on Fig 1 R11904 Fig 1 Voltage at S80 220 240 VAC Time Compressor ON Refrigerant system check Check for refrigerant leakage See the service diagnosis on refrigerant shortage U0 ...

Page 156: ...e 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 remove the wire on the terminals it is possible to connect wires available on site to the outdoor unit from output side of PCB Do not connect them to the compressor at the same time otherwise it may resul...

Page 157: ...PCB 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 Caution 1 When the output frequency is low the LEDs blink slowly As the output frequency increases the LEDs blink quicker The LEDs look like they are lit 2 On completion of the inverter checker diag...

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 when the fan motor is rotated 1 turn by hand When the fuse is melted check the outdoor fan motor for proper function If NG in step 2 Defective PCB Replace the outdoor unit PCB If NG in step 4 Defect...

Page 159: ...tacles 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 direction Change the installation location or direction Clean the outdoor heat exchanger Change the installation location or direction Check the outdoor temperature The outdoor temperature should be withi...

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 Replace the compressor Discharge pressure check R15001 YES YES NO NO Outdoor fan system is functioning Check the outdoor fan system Go to Check No 16 Outdoor fan running Fan motor lead wire connector ...

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 digital tester 2 3 4 2 3 1 Positive terminal of tester negative terminal for digital tester 4 2 3 1 2 3 Resistance is OK several k several M several k several M Resistance is NG 0 or 0 0 0 or R12035 Te...

Page 162: ...heck 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 to touch any live parts Tester 1 2 3 4 R14700 Multimeter DC voltage range R13538 ...

Page 163: ...nector 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 the following table 09 12 class Negative terminal of tester positive terminal for digital tester Power module UVW Power module UVW Positive terminal of tester negative terminal for digital tester UVW ...

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

Page 165: ...er 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 Removal of Electrical Box 228 3 4 Removal of PCBs 232 3 5 Removal of Horizontal Blades Swing Motors 241 3 6 Removal of Fan Motor 250 3 7 Removal of Indoor Heat Exchanger 254 3 8 Removal of Fan Rotor 258 ...

Page 166: ...Panels 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 Outdoor Unit RKS30 36LVJU RXS30 36LVJU 356 7 1 Removal of Outer Panels 356 7 2 Removal of Electrical Box 367 7 3 Removal of PCBs 371 7 4 Removal of Fan Motor 374 7 5 Removal of Coils Thermistors 375 ...

Page 167: ...n 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 Slightly push up the center knob of the air filter and release the hooks The air filter is not marked for difference between the right and left sides The air filter can be set easily by inserting it al...

Page 168: ...ir 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 Unfasten the 5 hooks and remove the Titanium apatite photocatalytic air purifying filter from its frame Step Procedure Points R7904 Air filter Titanium apatite photocatalytic air purifying filter ASSY ...

Page 169: ...p 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 shafts one by one into the grooves and fully push them into position 3 Slide the right rotary shaft to the left and release it 4 Remove the front panel R7906 Front panel R7907 Rotary shaft R7909 Rotary s...

Page 170: ...ing 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 of Front Panel 2 Pull out the service cover diagonally down in the direction of the arrow 3 The figure shows the inside R7911 Service cover R13488 R13489 ...

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 reassembling make sure that all the 3 hooks are fastened as they were Step Procedure Points R13490 R13491 Hook R12715 R12268 ...

Page 172: ...rizontal 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 slightly 3 Unfasten the left shaft 4 Unfasten the right 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 m...

Page 173: ...right 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 and then to the left shaft 3 Remove the fan guard 1 Unfasten the hooks at the lower part of the fan guard with a flat screwdriver Step Procedure Points R7925 Horizontal blade small R7926 R13737 Key ...

Page 174: ...ASSYs 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 screwdriver Step Procedure Points R8079 R13092 Vertical blade ASSY Pivot Interlock shaft R13093 Interlock rod R13094 ...

Page 175: ...oval 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 Step Procedure Points R13095 Hook Vertical blade ...

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 of the wire retainer 3 Remove the 4 screws of the terminal board and disconnect the connection wires R13496 Electrical box R13497 Wire retainer R16968 Terminal board Connection wire ...

Page 177: ...91133 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 Points R13499 S1 R7935 S41 R7936 ...

Page 178: ...varies 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 pressing it from above and pulling the electrical box Step Procedure Points R7937 Indoor heat exchanger thermistor Clip R11268 R16969 Ground wire R3939 R8081 Hook ...

Page 179: ...S091133 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 fastened Step Procedure Points R8082 ...

Page 180: ...ows 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 the hook at the side of the shield plate 4 Lift up the shield plate to unfasten the lower hooks and remove it R13747 Signal receiver PCB Control PCB Display PCB inside Shield plate INTELLIGENT EYE sens...

Page 181: ...erminal 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 Step Procedure Points R10315 Terminal board R12277 Signal receiver unit R8262 ...

Page 182: ...iver 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 Points R12278 Hook R8088 Signal receiver unit R8092 INTELLIGENT EYE sensor PCB R8093 S26 ...

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 the connection of the wire harness for the display PCB Step Procedure Points R8090 Signal receiver PCB R8091 S48 R8094 Display PCB ...

Page 184: ...e 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 reassembling be sure to fit all the 4 hooks Step Procedure Points R10318 Hook R8096 LED 3 Green LED 1 Green S49 LED 2 Yellow R8097 Hook Control PCB R8098 ...

Page 185: ...ts 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 for detail Step Procedure Points R16970 S32 S1 S47 S25 S46 S41 R8100 S48 S49 S26 LED2 Yellow LED3 Green LED1 Green ...

Page 186: ...disassembling 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 Remove the screw at the rear and remove the screws on the right and the left side of the swing motors for horizontal blades R10323 R10329 Drain hose R13748 Swing motor for horizontal blades ...

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 Points R13092 Interlock shaft Pivot Vertical blade R8126 Swing motor unit R8127 Interlock shaft R10331 Vertical blade interlock ...

Page 188: ...33 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 R10333 R10334 ...

Page 189: ...opposite 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 Fix both swing motors with a screw 1 Remove the screw and remove the swing motors for horizontal blades 2 Disconnect the harnesses from the motors Step Procedure Points R8131 Connector for lower blad...

Page 190: ...isconnecting 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 cycle thus resulting in pipe rupture or accidental injury Place a plastic sheet under the drain pan to prevent from wetting the floor with remaining drain If the drain hose is embedded in the wall disc...

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 exchanger be sure to wear gloves or wrap the indoor heat exchanger with cloth You may be injured by the fins Step Procedure Points R10622 Piping fixture R17120 R10546 ...

Page 192: ...wdriver 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 Remove the indoor heat exchanger Step Procedure Points R13138 Upper hook R13139 Indoor heat exchanger Lower hook R13140 ...

Page 193: ...urning 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 Exchanger 1 Remove the 2 screws and remove the right side plate 2 Release the fan motor wire harness from the hook R8112 R13502 Right side plate R8114 R8115 ...

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 Procedure Points R8116 Fan motor fixing plate R8117 R8118 R8119 Fan rotor ...

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 4 Tighten the screw completely if appropriate 5 If not appropriate go back to 1 3 Press the bearing ASSY from outside 4 Remove the bearing Step Procedure Points R8120 Lock screw Fan motor 5 mm 0 2 i...

Page 196: ...rm 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 where it stops 2 Slightly push up the center knob of the air filter and unfasten the hooks The 2 filters are interchangeable The air filter can be set easily by inserting it along the guides Inser...

Page 197: ...urifying 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 filter from its frame Step Procedure Points R16262 Air filter Titanium apatite photocatalytic air purifying filter ASSY R9478 Frame Titanium apatite photocatalytic air purifying filter ...

Page 198: ...he 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 end when reassembling 2 Remove the front panel Step Procedure Points R16456 Front Panel R9480 R9481 R16684 ...

Page 199: ...upplies 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 Remove the front grille 1 Remove the 3 screws of the front grille Refer to the removal procedure in a reverse way when reassembling R9483 Service cover R9484 R16685 Front grille ...

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 Step Procedure Points R16266 R16686 R16511 Hook R9487 Hook R12715 ...

Page 201: ...1133 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 they were Step Procedure Points R16269 ...

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 the model 1 Remove the screw 2 Remove the drip proof plate from the indoor heat exchanger When reassembling fit the hook to the indoor heat exchanger 1 2 3 R16270 1 2 3 R16271 Drip proof plate R1627...

Page 203: ...r 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 on the model Be careful not to lose the clip of the thermistor Step Procedure Points R16274 R16275 R16276 Clip R11268 ...

Page 204: ...nnect 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 connector for the swing motors S41 Step Procedure Points 1 2 3 R16277 Terminal board Wire retainer 1 2 3 R16278 S1 R16279 S41 ...

Page 205: ...from 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 Step Procedure Points R16280 1 2 3 R16281 Electrical box R16282 R9647 Bottom frame Hook ...

Page 206: ...ower 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 Electrical Box 2 Open the shield plate The shield plate has 2 hooks at the lower part also 3 Remove the shield plate R9506 Shield plate R16283 R16498 Hook R16284 ...

Page 207: ...XS15 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 board R16971 Clamp ...

Page 208: ...s 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 unit Step Procedure Points R9514 Hook R13518 Hook Signal receiver unit R9516 Hook ...

Page 209: ...Unfasten 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 Points R13519 Signal receiver PCB Signal receiver unit R9521 R9522 S48 ...

Page 210: ...the 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 sensor is not completely set Step Procedure Points R9523 Hook Hook INTELLIGENT EYE sensor ASSY R9524 R9525 Sensor Shield plate ...

Page 211: ...cedure 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 INTELLIGENT EYE sensor PCB R9527 S36 R9528 Display PCB ...

Page 212: ...4LVJU 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 S49 SW1 BZ LED1 LED2 LED3 R13520 S49 ...

Page 213: ...US091133 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 Hook Control PCB R16550 Ground wire ...

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 detail Step Procedure Points R9519 Terminal R17042 S1 S32 S41 S46 S25 S47 ...

Page 215: ...e 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 something sturdy such as a piece of wood 2 Release the shafts in turn R9568 Horizontal blade R9536 left R9537 inner right ...

Page 216: ...or 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 blade R9535 R16292 ...

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 remove the fan guard Remove the other 2 fan guards likewise Step Procedure Points R16687 R16688 R16689 ...

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 Points R9546 Interlock rod R16296 R16297 ...

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 motor unit R9548 R9549 ...

Page 220: ...the 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 swing motors with a screw 8 Disconnect the connector to remove the swing motor 5 Remove the swing motor for vertical blades 1 Remove the link cover Step Procedure Points R16079 Swing motor lower blade ...

Page 221: ...ndoor 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 1 ...

Page 222: ...oor 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 vertical blade R9558 ...

Page 223: ...aution 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 may be sucked in to generate an over pressure in refrigeration cycle thus resulting in pipe rupture or accidental injury Place a plastic sheet under the drain pan to prevent from wetting the floor wit...

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 Bottom frame R9573 Piping fixture ...

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 heat exchanger with cloths You may be injured by the fins Step Procedure Points R9574 R9575 R13580 ...

Page 226: ...rocedure 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 Procedure Points R16310 R16311 Indoor heat exchanger ...

Page 227: ...or 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 2 Remove the fan rotor 1 Remove the screw of the fan motor fixing plate R16306 Right side plate R16307 R16972 Fan motor fixing plate ...

Page 228: ...or 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 Fan rotor R9648 ...

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 installed appropriately 4 Tighten the screw completely if appropriate 5 If not appropriate go back to 1 6 Remove the fan rotor Step Procedure Points R16305 Fan motor 5 mm 0 2 inch Side face of rotor R2808 Si...

Page 230: ...inutes 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 ASSY is united with a drain pan ASSY R16504 When reassembling connect the 3 vertical blade ASSYs Fasten the hooks at the connecting points ...

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 where it stops 2 Slightly push up the center knob of the air filter and unfasten the hooks The 3 filters are interchangeable The air filter can be set easily by inserting it along the guides Insert ...

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 its frame Step Procedure Points R9477 Air filter Titanium apatite photocatalytic air purifying filter ASSY R9478 Frame Titanium apatite photocatalytic air purifying filter ...

Page 233: ...he 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 end when reassembling 2 Remove the front panel Step Procedure Points R9479 Front Panel R9480 R9481 R9482 ...

Page 234: ...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 Remove the front grille 1 Remove the 3 screws of the front grille Refer to the removal procedure in a reverse way when reassembling R9483 Service cover R9484 R9485 Front grille ...

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 R16266 R9488 R9489 Front grille fixture ...

Page 236: ...nit 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 Hook R12715 R9487 Hook ...

Page 237: ...133 227 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 were Step Procedure Points R9492 ...

Page 238: ...upplies 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 screw 2 Remove the drip proof plate from the indoor heat exchanger When reassembling fit the hook to the indoor heat exchanger 1 2 3 R9493 1 2 3 R9494 Drip proof plate R9496 R9495 ...

Page 239: ...the 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 the screw and remove the wire retainer Step Procedure Points 1 2 3 R16976 Ground wire 1 2 3 R9498 Indoor heat exchanger thermistor Clip R11268 1 2 3 R9499 Terminal board Wire retainer ...

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 1 2 3 R9500 S1 R9501 Ferrite core R9502 S41 ...

Page 241: ...from 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 Step Procedure Points R9503 1 2 3 R9504 Electrical box R9505 R9647 Bottom frame Hook ...

Page 242: ...0 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 The shield plate has 2 hooks at the lower part also 3 Remove the shield plate R9506 Shield plate R9507 R9508 Hook R9509 ...

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 R9513 Clamp ...

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 unit Step Procedure Points R9514 Hook R13518 Hook Signal receiver unit R9516 Hook ...

Page 245: ...Unfasten 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 R13519 Signal receiver PCB Signal receiver unit R9521 R9522 S48 ...

Page 246: ...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 the sensor is not completely set Step Procedure Points R9523 Hook Hook INTELLIGENT EYE sensor ASSY R9524 R9525 Sensor Shield plate ...

Page 247: ...6LVJU 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 sensor PCB R9527 S36 ...

Page 248: ...ndoor 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 R9529 R9530 Hook ...

Page 249: ...tor 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 S49 SW1 BZ LED1 LED2 LED3 R13520 S49 R9517 Hook Hook Control PCB R16550 Ground wire ...

Page 250: ...he 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 detail Step Procedure Points R9519 Terminal R17047 S1 S32 S41 S46 S25 S47 ...

Page 251: ...e 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 etc 2 Remove the screw at the rear of the indoor unit 3 Remove the 2 screws front and rear R9568 Horizontal blade R9533 R9534 ...

Page 252: ...133 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 inner right ...

Page 253: ...lade 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 sealing material on the right Step Procedure Points inner left R9538 R9539 R14469 R14470 ...

Page 254: ...t 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 likewise Step Procedure Points R14471 Air outlet ASSY R9543 Hook R9544 Fan guard R9545 ...

Page 255: ...dure 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 Interlock rod R13579 Drain hose Swing motor unit R9548 ...

Page 256: ...If 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 motor for the lower blade connector red 3 Fix both the swing motors with a screw 6 Disconnect the connector to remove the swing motor Step Procedure Points R9549 R9550 Swing motor lower blade Swing mot...

Page 257: ...0 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 Interlock rod 2 R9554 ...

Page 258: ...t 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 motor for vertical blade ...

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

Page 260: ...r 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 Remove the screw of the fan motor fixing plate R9559 R9560 Fan motor fixing plate ...

Page 261: ...1 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 R9561 Hook R9562 R9563 Motor mounting plate ...

Page 262: ...t 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 appropriately 4 Tighten the screw completely if appropriate 5 If not appropriate go back to 1 6 Remove the fan motor Step Procedure Points R9564 Motor mounting plate 5 mm 0 2 inch Side face of rotor R280...

Page 263: ...Indoor 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 absorber ...

Page 264: ...aution 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 may be sucked in to generate an over pressure in refrigeration cycle thus resulting in pipe rupture or accidental injury Place a plastic sheet under the drain pan to prevent from wetting the floor wit...

Page 265: ...S091133 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 Bottom frame R9573 Piping fixture ...

Page 266: ...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 heat exchanger with cloths You may be injured by the fins Step Procedure Points R9574 R9575 R13580 ...

Page 267: ...l 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 Procedure Points R13581 R9578 Indoor heat exchanger ...

Page 268: ...r 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 fan rotor 1 Remove the screw of the fan motor fixing plate 2 Remove the fan motor fixing plate R9579 Right side plate R9580 R17121 R9581 ...

Page 269: ...m 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 installed appropriately 4 Tighten the screw completely if appropriate 5 If not appropriate go back to 1 5 Remove the fan rotor Step Procedure Points Fan rotor R9648 R9583 Fan motor 5 mm 0 2 inch Sid...

Page 270: ...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 blade ASSY is united with a drain pan ASSY R16979 When reassembling connect the 3 vertical blade ASSYs Fasten the hooks at the connecting points ...

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 panels When reassembling make sure to fit the 5 hooks 1 Remove the screw of the stop valve cover Pull the stop valve cover downward and remove it R7186 R16044 Stop valve cover Hook R16977 ...

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 cover R16980 Discharge grille R16981 ...

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 R16982 Front panel R16983 Hook R16984 ...

Page 274: ...the 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 Procedure Points Outdoor fan R16922 10 mm 0 39 inch R16985 D cut R11828 Outdoor temperature thermistor R16986 ...

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 R11832 ...

Page 276: ...Unit 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 R11833 R12314 R7206 ...

Page 277: ...so 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 them with a lock nut Remove the screws and detach the connection wires 1 Remove the 2 screws on the rear side Step Procedure Points R11835 R3249 Lead wire Outdoor fan Fan motor R12311 R16988 R16989 ...

Page 278: ...al 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 Points Right side panel R16990 R16991 R11842 ...

Page 279: ...9 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 R16992 Guard net R16993 ...

Page 280: ...re 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 2 Disconnect the connector for the four way valve coil S80 3 Disconnect the 2 connectors for the reactor When reassembling you can connect the 2 harnesses in either way regardless of the color S40 R...

Page 281: ...LVJU 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 R16927 S20 R16928 R16994 ...

Page 282: ...reful 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 Outdoor heat exchanger thermistor R16995 Clip R3264 Discharge pipe thermistor R11849 R12279 Clip Electrical Box R16996 ...

Page 283: ...upplies 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 without removing the electrical box 1 Layout of the main PCB 2 Remove the screw on the terminal board Main PCB Forced operation button PCB R16997 Terminal board R11854 ...

Page 284: ...ll 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 clamp Step Procedure Points Ground wire R16998 Forced operation button PCB S110 R16932 R16933 ...

Page 285: ...r 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 R16936 ...

Page 286: ...Removal 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 Points S100 R16937 HL3 HN3 R16938 R16939 ...

Page 287: ...09 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 R11865 R16940 R16999 ...

Page 288: ...20 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 hook 2 Cut the clamp Step Procedure Points S100 S90 S10 HN3 HL3 S80 S20 S40 S70 R11868 Filter PCB R17000 R16943 ...

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: ...utdoor 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 R17004 R16949 ...

Page 291: ...minutes 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 Fan Motor Remove the electrical box according to the Removal of Electrical Box 1 Remove the screw and remove the reactor Reactor R11879 R11880 ...

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 frame Step Procedure Points Partition plate R12273 Hook R13508 ...

Page 293: ...e 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 the string and open the sound blanket outer 3 Lift and remove the sound blanket outer Sound blanket top R11884 Sound blanket outer R11885 R11886 ...

Page 294: ...US091133 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 R11888 ...

Page 295: ...y 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 Remove the terminal cover Electronic expansion valve coil R7233 Terminal cover R7234 ...

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 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 For the ...

Page 297: ...connect 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 cut pipes because the sawdust may enter 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 ...

Page 298: ...nt 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 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 For the sake of this wrap the four way valve with wet c...

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 peripheries Be careful so as not to burn the compressor terminals the name plate the heat exchanger fins 4 Lift the compressor up and remove it Step Procedure Points Suction side R12032 R7254 ...

Page 300: ...rning 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 Remove the 4 screws and remove the discharge grille Slide the discharge grille upward and remove it The discharge grille has 4 hooks Top panel R16754 Discharge grille R16755 R16756 ...

Page 301: ...rocedure 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 Procedure Points Front panel R16757 R16759 R16760 ...

Page 302: ...8LVJU 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 valve cover R16761 R16762 R16763 ...

Page 303: ...before 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 for the fan motor S70 3 Release the clamp from the partition plate The ferrite core of the fan motor lead wire has a clamp Drip proof cover R17049 R16951 S70 Ferrite core Partition plate R16952 ...

Page 304: ...moval 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 Outdoor fan R16787 R16985 10 mm 0 39 inch ...

Page 305: ...align 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 bottom 9 Remove the fan motor fixing frame Step Procedure Points R16788 Fan motor fixing frame R16953 R16790 ...

Page 306: ...091133 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 R16792 ...

Page 307: ...g 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 3 Remove the screws and remove the connecting wires and the power supply wires R16955 Protection plate 12 3 Lock nut Conduit mounting plate Conduit 1 2 inch 21 3mm R16825 R16956 R16914 Power supply w...

Page 308: ...screws 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 Conduit mounting plate R16781 Ground wire R16794 Outdoor temperature thermistor ...

Page 309: ...ove 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 Procedure Points Right side panel R16957 Hook R16823 Hook R16824 R16766 ...

Page 310: ...eat 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 Outdoor heat exchanger thermistor R16819 R16951 S70 Ferrite core Partition plate R16952 ...

Page 311: ...091133 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 R16764 R16796 R16797 S40 R16782 ...

Page 312: ...or 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 R16798 S20 R16799 ...

Page 313: ...e 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 4 S70 Step Procedure Points R16767 Wire saddle R16800 R16801 S80 S40 S80 S20 R14363 ...

Page 314: ...cedure 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 Step Procedure Points R16802 R14312 R14313 R16950 ...

Page 315: ...hermistors 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 wire saddle Step Procedure Points R16806 S90 R14315 R16958 Thermistor harnesses R14316 Wire saddle ...

Page 316: ...33 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 R16770 R16749 ...

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: ...o 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 pull out the clamp 2 Disconnect the connector S10 S10 for S11 on filter PCB R16959 S12 Main PCB R16808 S10 ...

Page 319: ...g 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 Points R16775 R16747 Compressor harness red blue yellow HN3 white HL3 blue R16809 R16810 R16960 Harnesses from HL2 blue and HN2 white ...

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: ...rews 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 thermistors HL3 HN3 filter PCB Step Procedure Points R16814 R14330 R14331 R14332 S80 S12 HN3 HL3 S70 S20 S40 S90 S10 ...

Page 322: ...rews 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 Procedure Points R14333 Electrical box R14334 Radiation fin R16822 Ground wire Terminal board R16815 1 2 3 ...

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: ...val 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 plate 1 Remove the 2 screws 2 Remove the partition plate R16773 R16774 ...

Page 327: ...l 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 Sound blanket top lower R16783 Sound blanket back ...

Page 328: ...ing 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 Points R16776 Sound blanket outer Sound blanket inner R16778 R12286 Discharge pipe thermistor R12287 Clip ...

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: ...n 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 248 F For the sake of this wrap the four way valve with wet cloth and provide water so that the cloth does not dry Note Never use a metal saw to cut pipes because the sawdust may enter the circuit W...

Page 331: ...nic 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 valve coil 2 Remove the sheets of putty R16751 Electronic expansion valve coil R16752 ...

Page 332: ...ther 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 For global environmental protection do not discharge the refrigerant gas in the atmosphere Make sure to collect all the refrigerant gas 3 Heat up the 2 brazed parts of the electronic expansion valve ...

Page 333: ...pressor 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 wires of the compressor R5301 Terminal cover R5302 Red U Yellow V Blue W R16784 ...

Page 334: ...xic 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 discharge the refrigerant gas in the atmosphere Make sure to collect all the refrigerant gas 4 Remove the 2 nuts of the compressor Before working make sure that the refrigerant gas is empty in the circ...

Page 335: ...azing 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 cut pipes because the sawdust may enter 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...

Page 336: ...ter 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 exchanger fins 1 Unfasten the 2 hooks at the bottom first 2 Slide the suction grille downward to unfasten the 3 top hooks R16578 Hook Rear side Suction grille R16916 Hook R16917 ...

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 Procedure Points R6372 R6373 Top panel R16579 Right side panel ...

Page 338: ...91133 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 Panel 2 ...

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: ...S24LVJU 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 panel Hook R13521 Hook R16729 ...

Page 341: ...de 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 grille Step Procedure Points R16730 Discharge grille R16587 Front Panel 1 R16588 ...

Page 342: ...charge 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 Points Hook R16591 R16592 Outdoor fan R16736 13 mm 0 51 inch R17005 R16737 ...

Page 343: ...3 333 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 Partition plate 1 R16738 R16739 R6394 ...

Page 344: ...t 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 Hook R16740 R16741 R6995 ...

Page 345: ...edure 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 Points R16599 Rear panel Shield plate ASSY R17009 R17012 ...

Page 346: ...al 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 panel Partition plate 2 R17007 Hook R17010 ...

Page 347: ...ion 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 from the groove Step Procedure Points Wire fixing plate Insulation R17011 Holder R11151 Thermistor R14991 ...

Page 348: ...Removal 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 R16700 Stop valve mounting plate R16701 ...

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: ...arning 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 on the partition plate 1 Electrical box Stop valve mounting plate R16605 Partition plate 1 R16606 ...

Page 351: ...emove 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 Procedure Points Ground wire R16607 R7008 Fan motor lead wire R9468 ...

Page 352: ...t 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 of the compressor relay harness with pliers Step Procedure Points R5275 Clamp R16704 Clamp R6423 ...

Page 353: ...al 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 Step Procedure Points R6469 R16705 Hook R16706 ...

Page 354: ...ng 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 with pliers and remove the service monitor PCB 3 Remove the screws of the terminal board and the ground wire Service monitor PCB S52 S102 R16707 Clamp R16708 Terminal board R16709 Ground wire ...

Page 355: ...moval 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 Points R5283 R16710 R16711 N2 N1 L1 3 2 1 L2 ...

Page 356: ...the 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 Step Procedure Points HR2 Ferrite core HR1 R5286 Main PCB R5287 Hook R13524 Main PCB R5289 ...

Page 357: ...wer 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 first the fan motor may tilt down or fall and cause injury because its center of gravity is shifted to the front 3 Remove the fan motor When reassembling make sure that the wire harness is facing down...

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 valve coil out 2 Remove the four way valve coil 1 Remove the screw Electronic expansion valve coil R11159 R6457 ...

Page 359: ...Remove 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 heat exchanger thermistor R11160 Sound blanket outer R7011 ...

Page 360: ...133 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 thermistor R9469 ...

Page 361: ...o 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 is fragile Carefully pass the discharge pipe through it Sound blanket outer R16608 Sound blanket top upper R16609 ...

Page 362: ...tly 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 Step Procedure Points Partition plate 1 R16610 R16611 Sound blanket top lower R16612 ...

Page 363: ...oval 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 blanket inner R7018 Sound blanket inner R7019 ...

Page 364: ...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 Pull out the 3 lead wires 3 Remove the overload protector OL Terminal cover R9690 W blue U red V yellow OL R9471 ...

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: ...g 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 the clearances of the outdoor heat exchanger fins 1 Unfasten the 3 hooks at the upper first and then 3 hooks at the middle 2 Unfasten the 3 hooks at the bottom and remove the suction grille R16618 R1...

Page 367: ...e 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 side Step Procedure Points R16620 Top panel R16621 Right side panel R9688 ...

Page 368: ...091133 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 panel 2 ...

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 Procedure Points R16625 R16626 R16627 Insulation sheet ...

Page 370: ...e 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 Nut size M8 Step Procedure Points R9757 Discharge grille Front panel 1 R9758 R16628 Outdoor fan 13 mm 0 51 inch R17005 ...

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 Partition plate 1 R16629 R16630 R9601 ...

Page 372: ...36LVJU 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 Points R9602 Hook R16631 R9604 ...

Page 373: ...ear 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 Procedure Points R17015 R17016 Wire fixing plate R17017 Connecting wires Terminal board ...

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 plate 2 Rear panel R17014 Partition plate 2 R16637 ...

Page 375: ...p 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 Points Stop valve mounting plate R16638 R16639 Hook R9615 Outdoor temperature thermistor holder R9616 ...

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: ...ait 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 plate 1 3 Remove the 2 screws to detach the ground wires Stop valve mounting plate R16641 Partition plate 1 R16917 Ground wire R16642 ...

Page 378: ...hen 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 for S80 Step Procedure Points S70 Ferrite core R16918 For the ferrite core of electronic expansion valve coil For the thermistor ASSY harnesses For the four way valve coil harness For the ferrite core...

Page 379: ...edure 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 the compressor Step Procedure Points R9623 Clamp R9624 Clamp R9625 ...

Page 380: ...he 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 Step Procedure Points Fixing position for the thermistor harness Hook R16647 When reassembling insert the clamp into the small hole Electrical box Hook R16643 R16644 ...

Page 381: ...ff 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 S102 from the service monitor PCB 3 Detach the 4 clamps with pliers and remove the service monitor PCB Cover R9611 Service monitor PCB S52 S102 R16707 Clamp R16708 ...

Page 382: ...e 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 Procedure Points Terminal board R16709 Ground wire R5283 R5284 L2 N2 1 2 3 L1 N1 R5285 ...

Page 383: ...rnesses 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 26 for detail Step Procedure Points HR1 HR2 Ferrite core R5286 R5287 Hook R13524 R5289 Main PCB ...

Page 384: ...s 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 screws are removed first the fan motor may tilt down or fall and cause injury because its center of gravity is shifted to the front 4 Remove the fan motor When reassembling make sure that the wire h...

Page 385: ...expansion 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 the hook at the bottom of electrical box 3 Pull out the clamp of the thermistor harness from the hole of the electrical box 1 Pull out the outdoor heat exchanger thermistor 2 Slightly open the sound b...

Page 386: ...6 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 R9635 Discharge pipe thermistor Outdoor temperature thermistor holder R9636 ...

Page 387: ...1133 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 thermistor R9637 R9638 Four way valve coil R9639 ...

Page 388: ...f 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 through it 3 Remove the screw and slightly push the partition plate 1 to the left for easy work R16921 Sound blanket outer Sound blanket top upper R9641 Partition plate 1 R9642 ...

Page 389: ...ove 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 Points Sound blanket outer R9643 Sound blanket inner Compressor mount R9644 R9645 ...

Page 390: ...cedure 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 V yellow W blue 3 Remove the overload protector OL Terminal cover R9650 W blue U red V yellow OL R9471 ...

Page 391: ...re 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 Wrap the four way valve with a wet cloth and provide water so that the cloth does not dry In case of difficulty with gas brazing machine 1 Disconnect the brazed part where is easy to disconnect and res...

Page 392: ...ration 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 Cooling at Low Outdoor Temperature 389 4 5 Jumper Settings 390 5 Application of Silicon Grease to a Power Transistor and a Diode Bridge 391 ...

Page 393: ...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 wrench 4 After 2 to 3 minutes close the gas stop valve and stop the forced cooling operation Refer to page 384 for forced cooling operation 09 12 15 18 class 24 30 36 class Gas stop valve Valve cap Close Liquid stop valve Service port R13628 Hexagonal wrench Hexagonal wr...

Page 394: ...ess 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 any of the following conditions is fulfilled 1 The operation ends automatically after 15 minutes 2 Press the forced cooling operation ON OFF button SW1 on the indoor unit again 3 Press the ON OFF but...

Page 395: ...S091133 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 operation ON OFF button SW1 R14475 ...

Page 396: ...s 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 temperature Trial operation may be disabled in either operation mode depending on the room temperature After trial operation is complete set the temperature to a normal level 26 28 C 78 8 82 4 F in coo...

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 switch to C O 4 2 Temperature Display Switch You can select Fahrenheit or Celsius for temperature display Press the TEMP and buttons simultaneously for 5 seconds to change the unit of temperature disp...

Page 398: ...rent 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 address setting jumper FTXS09 12LVJU FTXS15 18 24 30 36LVJU FDXS series ADDRESS JC JA JB ADDRESS JA EXIST 1 CUT 2 R9665 JA ADDRESS ADDRESS JC JA JB ADDRESS JA EXIST 1 CUT 2 ADDRESS JA CUT EXIST 1 2 ADDRESS...

Page 399: ...s 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 or lower the operation stops If the outdoor temperature rises the operation starts again 09 12 class 15 18 class 1 2 3 S70 S40 S2 S90 J5 J4 J3 R12187 Cut the jumper J4 J5 J7 J8 J6 GND Top panel PCB 1...

Page 400: ...tting 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 jumper refer to the following pages Indoor unit page 14 17 20 SW4 ON A B C D SW1 R14478 Turn on the switch SW4 B LED A S2 S102 Jumper Function When connected factory set When cut JB on indoor unit PC...

Page 401: ...or 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 Wipe off the old silicon grease completely off the radiation fin Apply silicon grease evenly to the whole surface of the radiation fin Do not leave any foreign object such as solder or paper waste bet...

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: ...ROSS 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 FAN FIELD PIPING 1 4 CuT M FAN MOTOR HEADER FIELD PIPING 1 2 CuT 1 2 CuT REFRIGERANT FLOW COOLING HEATING THERMISTOR ON HEAT EXCH 4D074609 ...

Page 404: ...FAN 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 FLOW INDOOR UNIT HEATING M FIELD PIPING COOLING 3 8 CuT FAN MOTOR FIELD PIPING 5 16 CuT DISTRIBUTOR THERMISTOR ON HEAT EXCH 4D062742A ...

Page 405: ...grams 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 ONHEATEXCH ...

Page 406: ...OUTDOOR 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 HEATING CAPILLARY TUBE 4 M PROPELLER FAN EV FILTER RECEIVER MUFFLER FIELD PIPING MUFFLER 1 4 CuT 6 4 MUFFLER FIELD PIPING 1 2 CuT 12 7 COMPRESSOR UNIT INCH mm HEAT EXCHANGER THERMISTOR OUTDOOR TEMPERA...

Page 407: ...RMISTOR 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 16CuT 5 16CuT 5 16CuT 5 16CuT 5 16CuT 5 16CuT RECEIVER 1 2CuT 5 16CuT 5 16CuT 5 32CuT 5 16CuT 5 16CuT EV 5 16CuT 3 8CuT 3 8CuT 3 8CuT 5 16CuT FILTER FILTER DISTRIBUTOR DC FAN MOTOR M CAPILLARY TUBE 3 8...

Page 408: ...ILTER 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 FIELD PIPING HEATING GAS 5 8 CuT 5 8CuT ACCUMULATOR ACCUMULATOR DISCHARGE PIPE THERMISTOR 4 WAY VALVE ON HEATING GAS LINE STOP VALVE LIQUID LINE STOP VALVE ELECTRONIC EXPANSION VALVE HEAT EXCHANGER COND...

Page 409: ...ILOT 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 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 CAUTION FG SW1 S21 t S1 HA 7 RED BZ 4 BLU S25 BLK MS 3 BRN 1 1 PCB4 BLK ORG S36 1 WHT 3 S41 S...

Page 410: ...1M 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 M1F A1P A2P Q1M R1T R2T S1 S32 RTH1 S1W V1TR X1M PILOT LAMP FAN MOTOR PRINTED CIRCUIT BOARD THERMAL PROTECTOR FOR MOTOR THERMISTOR CONNECTOR OPERATION SWITCH TRIAC TERMINAL BLOCK PROTECTIVE GROUND CA...

Page 411: ...1 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 MRM20 N 5 FU3 Z3C X1M DB1 TO INDOOR UNIT L804 HL3 HL2 30A HL1 BLU L1 1 BLK 1 MRM10 MRM10 HN1 V2 WHT 2 2 L2 HN3 HN2 S C7 C8 WHT RED 3 3 GR 1 V3 BLK 1 BLK BLK FU1 3 15A L1 BLK BLK PCB2 GRN YLW MR30 S11...

Page 412: ...INTED 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 SA2 HR1 MRM20 3 15A POWER SUPPLY V100 N 4 FU1 MS V2 Z2C AC1 BLU MRM10 30A L1 3 L2 BRN 6 P 1 BRN L2 S70 9 8 ORG 1 WHT V9 7 N AC2 Z3C N 3 2 N 3 BLU TO INDOOR UNIT BLK M1C Z5C PM1 X11A N 3 U WHT U GR X...

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

Page 414: ...r 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 any local legislation Ask a qualified installer or contractor to install this product Do not try to install the product yourself Improper installation can result in water or refrigerant leakage elec...

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