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Daikin FLXS-BAVMB, Service Manual

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Daikin FLXS-BAVMB Service Manual Download Page 114

Troubleshooting

SiBE05-722_B

103

Service Diagnosis

Troubleshooting

Correct the power supply.

Replace the PM1. (Replace 
the outdoor unit PCB.)

Check for such factors for a 
long term.

∗

 Try to restart a few times.

(R8402)

Caution

Be sure to turn off the power switch before connecting or disconnecting 
connectors, or parts may be damaged.

NO

YES

YES

NO

YES

NO

Replace the fan motor or 
the outdoor unit PCB.

Check the supply voltage.

Rotate the fan by hand.

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.

Turn on the 

power again. System 

restarted?

Does the fan rotate 

smoothly?

Supply voltage as 

specified?

Summary of Contents for FLXS-BAVMB

Page 1: ...Service Manual Inverter Pair Floor Ceiling Suspended Dual Type BA Series SiBE05 722_B Applied Models Inverter Pair Cooling Only Inverter Pair Heat Pump ...

Page 2: ...eries zCooling Only Indoor Unit FLKS25BAVMB FLKS35BAVMB Outdoor Unit RKS25E2V1B RKS25G2V1B RKS25G2V1B9 RKS35E2V1B RKS35G2V1B RKS35G2V1B9 zHeat Pump Indoor Unit FLXS25BAVMB FLXS35BAVMB Outdoor Unit RXS25E2V1B RXS25G2V1B RXS25G2V1B9 RXS25J2V1B RXS35E2V1B RXS35G2V1B RXS35G2V1B9 RXS35J2V1B ...

Page 3: ...rflow Direction Control 26 1 4 Fan Speed Control for Indoor Units 27 1 5 Program Dry Operation 28 1 6 Automatic Operation 29 1 7 Thermostat Control 30 1 8 NIGHT SET Mode 31 1 9 HOME LEAVE Operation 32 1 10 Inverter POWERFUL Operation 33 1 11 Other Functions 34 2 Function of Thermistor 35 3 Control Specification 36 3 1 Mode Hierarchy 36 3 2 Frequency Control 37 3 3 Controls at Mode Changing Start u...

Page 4: ...between Indoor Unit and Outdoor Unit 75 4 7 Unspecified Voltage between Indoor Unit and Outdoor Unit 76 4 8 Outdoor Unit PCB Abnormality 77 4 9 OL Activation Compressor Overload 78 4 10 Compressor Lock 79 4 11 DC Fan Lock 80 4 12 Input Overcurrent Detection 81 4 13 Four Way Valve Abnormality 82 4 14 Discharge Pipe Temperature Control 84 4 15 High Pressure Control in Cooling 85 4 16 Compressor Syst...

Page 5: ...Panels Fan Motor 133 2 2 Removal of Electrical Box 141 2 3 Removal of PCB 145 2 4 Removal of Reactor Partition Plate 147 2 5 Removal of Sound Blankets 149 2 6 Removal of Four Way Valve 151 2 7 Removal of Compressor 154 3 Outdoor Unit RK X S25 35G2V1B 156 3 1 Removal of Outer Panels Fan Motor 156 3 2 Removal of Electrical Box 165 3 3 Removal of Thermistors 169 3 4 Removal of PCB 171 3 5 Removal of ...

Page 6: ...g 216 4 3 Facility Setting Jumper cooling at low outdoor temperature 217 4 4 Jumper and Switch Settings 218 5 Application of Silicon Grease to a Power Transistor and a Diode Bridge 219 Part 9 Appendix 220 1 Piping Diagrams 221 1 1 Indoor Unit 221 1 2 Outdoor Unit 222 2 Wiring Diagrams 224 2 1 Indoor Unit 224 2 2 Outdoor Unit 224 ...

Page 7: ...ower cable plug from the plug socket before disassembling the equipment for repair Working on the equipment that is connected to the power supply may cause an electrical shock If it is necessary to supply power to the equipment to conduct the repair or inspecting the circuits do not touch any electrically charged sections of the equipment If the refrigerant gas is discharged during the repair work...

Page 8: ...electrical shock Do not clean the air conditioner by splashing water Washing the unit with water may cause an electrical shock Be sure to provide the grounding when repairing the equipment in a humid or wet place to avoid electrical shocks Be sure to turn off the power switch and unplug the power cable when cleaning the equipment The internal fan rotates at a high speed and cause injury Be sure to...

Page 9: ... heat generation or fire When wiring between the indoor and outdoor units make sure that the terminal cover does not lift off or dismount because of the cable If the cover is not mounted properly the terminal connection section may cause an electrical shock excessive heat generation or fire Do not damage or modify the power cable Damaged or modified power cable may cause an electrical shock or fir...

Page 10: ...event children from swallowing it If a child swallows the coin battery see a doctor immediately Warning Caution Installation of a leakage breaker is necessary in some cases depending on the conditions of the installation site to prevent electrical shocks Do not install the equipment in a place where there is a possibility of combustible gas leaks If the combustible gas leaks and remains around the...

Page 11: ...re to install the packing and seal on the installation frame properly If the packing and seal are not installed properly water may enter the room and wet the furniture and floor For unitary type only Caution Icon Type of Information Description Note Note A note provides information that is not indispensable but may nevertheless be valuable to the reader such as tips and tricks Caution Caution A ca...

Page 12: ...SiBE05 722_B 1 List of Functions Part 1 List of Functions 1 Functions 2 ...

Page 13: ...p and Down Self Diagnosis Digital LED Display Horizontal Auto Swing Right and Left Wiring Error Check Function 3 D Airflow Anti Corrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Indoor Unit Quiet Operation Flexibility Multi Split Split Type Compatible Indoor Unit NIGHT QUIET Mode Automatic OUTDOOR UNIT QUIET Operation Manual Flexible Power Supply Correspondence INTELLIGE...

Page 14: ...Down Self Diagnosis Digital LED Display Horizontal Auto Swing Right and Left Wiring Error Check Function 3 D Airflow Anti Corrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Indoor Unit Quiet Operation Flexibility Multi Split Split Type Compatible Indoor Unit NIGHT QUIET Mode Automatic OUTDOOR UNIT QUIET Operation Manual Flexible Power Supply Correspondence INTELLIGENT EYE...

Page 15: ...d Down Self Diagnosis Digital LED Display Horizontal Auto Swing Right and Left Wiring Error Check Function 3 D Airflow Anti Corrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Indoor Unit Quiet Operation Flexibility Multi Split Split Type Compatible Indoor Unit NIGHT QUIET Mode Automatic OUTDOOR UNIT QUIET Operation Manual Flexible Power Supply Correspondence INTELLIGENT E...

Page 16: ...p and Down Self Diagnosis Digital LED Display Horizontal Auto Swing Right and Left Wiring Error Check Function 3 D Airflow Anti Corrosion Treatment of Outdoor Heat Exchanger Comfort Control Auto Fan Speed Indoor Unit Quiet Operation Flexibility Multi Split Split Type Compatible Indoor Unit NIGHT QUIET Mode Automatic OUTDOOR UNIT QUIET Operation Manual Flexible Power Supply Correspondence INTELLIGE...

Page 17: ...SiBE05 722_B Specifications 6 Part 2 Specifications 1 Specifications 7 1 1 Cooling Only 7 1 2 Heat Pump 10 ...

Page 18: ... Downward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 33 0 32 0 31 0 38 0 36 0 35 Power Consumption Rated W 70 70 70 78 78 78 Power Factor 96 4 95 1 94 1 93 3 94 2 92 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 200 Packaged Dimensions H W D mm 280 1 100 566 280 1 100 566 Weigh...

Page 19: ...r Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 33 0 32 0 31 0 38 0 36 0 35 Power Consumption Rated W 70 70 70 78 78 78 Power Factor 96 4 95 1 94 1 93 3 94 2 92 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 200 Packaged Dimensions H W D mm 280 1 100 566 280 1 100 566 Weight kg 16 16 Gross We...

Page 20: ...r Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 33 0 32 0 31 0 38 0 36 0 35 Power Consumption Rated W 70 70 70 78 78 78 Power Factor 96 4 95 1 94 1 93 3 94 2 92 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 200 Packaged Dimensions H W D mm 280 1 100 566 280 1 100 566 Weight kg 16 16 Gross We...

Page 21: ...ward Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 33 0 32 0 31 0 36 0 34 0 33 0 38 0 36 0 35 0 38 0 36 0 35 Power Consumption Rated W 70 70 70 74 74 74 78 78 78 78 78 78 Power Factor 96 4 95 1 94 1 93 4 94 6 93 4 93 3 94 2 92 9 93 3 94 2 92 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490...

Page 22: ...Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 33 0 32 0 31 0 36 0 34 0 33 0 38 0 36 0 35 0 38 0 36 0 35 Power Consumption Rated W 70 70 70 74 74 74 78 78 78 78 78 78 Power Factor 96 4 95 1 94 1 93 4 94 6 93 4 93 3 94 2 92 9 93 3 94 2 92 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 20...

Page 23: ...r Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 33 0 32 0 31 0 36 0 34 0 33 0 38 0 36 0 35 0 38 0 36 0 35 Power Consumption Rated W 70 70 70 74 74 74 78 78 78 78 78 78 Power Factor 96 4 95 1 94 1 93 4 94 6 93 4 93 3 94 2 92 9 93 3 94 2 92 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 ...

Page 24: ...r Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 33 0 32 0 31 0 36 0 34 0 33 0 38 0 36 0 35 0 38 0 36 0 35 Power Consumption Rated W 70 70 70 74 74 74 78 78 78 78 78 78 Power Factor 96 4 95 1 94 1 93 4 94 6 93 4 93 3 94 2 92 9 93 3 94 2 92 9 Temperature Control Microcomputer Control Microcomputer Control Dimensions H W D mm 490 1 050 200 490 1 050 ...

Page 25: ...ed Circuit Board Connector Wiring Diagram 14 Part 3 Printed Circuit Board Connector Wiring Diagram 1 Indoor Unit 15 2 Outdoor Unit 17 2 1 RK X S25 35E2V1B 17 2 2 RK X S25 35G2V1B 19 2 3 RK X S25 35G2V1B9 RXS25 35J2V1B 21 ...

Page 26: ...tting jumper Refer to page 215 for detail JB Fan speed setting when compressor stops for thermostat OFF JC Power failure recovery function Refer to page 218 for detail 9 SW2 Select switch for installation ceiling or floor Refer to page 218 for detail 10 LED A LED for service monitor green 1 S36 Connector for control PCB 2 H1 H2 H3 Connector for terminal board 3 H4 H5 H6 Connector for AC fan motor ...

Page 27: ... Control PCB PCB 2 Power Supply PCB PCB 3 Display PCB PCB 4 Signal Receiver PCB SW2 S7 S6 S24 JC JB JA S37 S32 S26 S21 LED A 2P084352 3 S36 FU1 H2 H3 H4 H5 H6 H1 V1 2P084361 1 LED3 LED2 LED1 S25 2P084377 5 SW1 S31 RTH PbF SW1 I RTH WLU 3 C1 C2 C3 EX511 REV 12 S27 S27 2P084377 5 PHOTO 2P084377 ...

Page 28: ...ector for electronic expansion valve coil 3 S30 Connector for compressor 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 HC3 HC4 HL3 HN3 Connector for filter PCB 9 HR2 Connector for reactor 10 FU1 FU2 Fuse 3 15 A 250 V 11 LED A LED for service mon...

Page 29: ...ted Circuit Board Connector Wiring Diagram 18 PCB Detail PCB 1 Filter PCB PCB 2 Main PCB HC2 V3 V2 FU3 3P143310 1 E HL1 HN1 S HR1 HN2 HC1 S11 HL2 2P143284 6 S90 LED A S40 S10 S30 HC3 HN3 S20 S80 V1 FU1 HL3 HC4 HR2 FU2 J8 J5 S70 SW1 ...

Page 30: ... for electronic expansion valve coil 3 S30 Connector for compressor 4 S40 Connector for overload protector 5 S50 Connector for magnetic relay 6 S70 Connector for fan motor 7 S80 Connector for four way valve coil 8 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 9 HL3 HN3 Connector for filter PCB 10 HR2 Connector for reactor 11 FU1 FU2 Fuse 3 15 A 250 V 12 LE...

Page 31: ... Circuit Board Connector Wiring Diagram 20 PCB Detail PCB 1 Filter PCB PCB 2 Main PCB E1 E2 V2 FU3 HL1HN1 S S50 on main PCB HL2 S11 HN2 HR1 3P203203 1 V3 S10 S20 2P203198 1 J5 J8 S90 S50 S40 S70 LED A FU2 V1 S80 HL3 HR2 HN3 S30 FU1 SW1 ...

Page 32: ...xpansion valve coil 3 S40 Connector for overload protector 4 S50 Connector for magnetic relay 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 S100 Connector for forced operation button PCB 9 HL3 HN3 Connector for filter PCB 10 HR2 Connector for reactor 11 U V W Connector for compressor...

Page 33: ...ng Diagram 22 PCB Detail PCB 1 Filter PCB PCB 2 Main PCB PCB 3 Forced Operation Button PCB HR1 HL2 S50 on main PCB 3P254234 1 FU1 HN2 S FU3 AC2 E1 E2 AC1 S11 V3 V2 S10 J5 J4 S90 FU2 S100 S50 2P254206 1 S70 S40 S20 S80 HL3 HN3 V1 LED A U VW HR2 SW1 S110 3P255755 1 ...

Page 34: ...ME LEAVE Operation 32 1 10 Inverter POWERFUL Operation 33 1 11 Other Functions 34 2 Function of Thermistor 35 3 Control Specification 36 3 1 Mode Hierarchy 36 3 2 Frequency Control 37 3 3 Controls at Mode Changing Start up 39 3 4 Discharge Pipe Temperature Control 41 3 5 Input Current Control 42 3 6 Freeze up Protection Control 43 3 7 Heating Peak cut Control 43 3 8 Outdoor Fan Control 44 3 9 Liqu...

Page 35: ...eration The target frequency is set by the following 2 parameters coming from the operating indoor unit The load condition of the operating indoor unit The difference between the room thermistor temperature and the target temperature Additional Control Parameters The target frequency is adapted by additional parameters in the following cases Frequency restrictions Initial settings Forced cooling o...

Page 36: ...d cooling Once the set temperature is reached the energy saving operation enables to maintain the room temperature at low power Frequency Limits The following functions regulate the minimum and maximum frequency Forced Cooling Operation Refer to page 213 for detail Refrigerant circulation rate high high f low f freq variable Refrigerant circulation rate low high speed low speed R2812 Amount of hea...

Page 37: ...nd Control 26 1 3 Airflow Direction Control Auto Swing The following table explains the auto swing process for cooling dry fan and heating up and down cooling dry fan heating ceiling floor 4 0 2 0 R2964 R2963 95 6 5 R2967 40 20 R2966 9 5 65 ...

Page 38: ...d operation the step SL is not available The airflow rate is automatically controlled within this range when the FAN setting button is set to automatic Cooling The following drawing explains the principle of fan speed control for cooling Heating On heating mode the fan speed is regulated according to the indoor heat exchanger temperature and the difference between the room thermistor temperature a...

Page 39: ...emperature at start up and the target temperature is divided into two zones Then the unit operates in the dry mode with an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level Room thermistor temperature at start up Target temperature X Thermostat OFF point Y Thermostat ON point Z 24ºC or more Room thermistor temperature at start up X 2 5ºC X 0 5ºC or ...

Page 40: ...ection value 1 The set temperature Ts determines the target temperature Tt Ts 18 30 C 2 The target temperature Tt is calculated as Tt Ts C where C is the correction value C 0 C 3 Thermostat ON OFF point and mode switching point are as follows Tr means the room thermistor temperature 1 Heating Cooling switching point Tr Tt 2 5 C 2 Cooling Heating switching point Tr Tt 2 5 C 3 Thermostat ON OFF poin...

Page 41: ...ter being in the zone A The system resumes from defrost control in any zones except A The operation turns on in any zones except A The monitoring time has passed while the temperature difference is in the zone B Cooling Dry 10 minutes Heating 10 seconds Cooling Dry Heating Refer to Temperature Control on page 24 for detail B A OFF ON C Cooling 1 0 C Dry 1 0 C Room thermistor temperature target tem...

Page 42: ... of heating This prevents excessive cooling in summer and excessive heating in winter to ensure comfortable sleeping conditions and also conserves electricity Cooling Heating 0 5 C 0 5 C R14060 0 5 C temperature shift A 0 5 C temperature shift B Target temperature remains the same TIMER operation NIGHT SET Mode ON Operation stops at the set hours 1 hour 30 minutes A When the outdoor temperature is...

Page 43: ... on the display of the remote controller The indoor unit is operated according to the set temperature and airflow rate for HOME LEAVE which were pre set in the memory of the remote controller The LED red of indoor unit representing HOME LEAVE lights up It goes out when the operation is stopped 3 End of Function The function ends when the HOME LEAVE button is pressed again during HOME LEAVE operati...

Page 44: ...minutes Ex POWERFUL operation in cooling mode Operation mode Fan speed Target temperature COOL H tap 50 rpm 18 C DRY Dry rotating speed 50 rpm Lowered by 2 0 C HEAT H tap 50 rpm 30 C FAN H tap 50 rpm AUTO Same as cooling heating in POWERFUL operation The target temperature is kept unchanged R7096 Target temp Fan 50 rpm 18 C H tap Set tap 20 minutes Ending condition or in 1 to 3 1 After the lapse o...

Page 45: ...ON OFF button for 5 to 9 seconds while the unit is not operating Refer to page 213 for detail Note When the ON OFF button is pressed for 10 seconds or more the forced cooling operation is stopped 1 11 4 Photocatalytic Deodorizing Filter The photocatalytic deodorizing filter powerfully decomposes odor of tobacco pet etc The deodorizing power is regenerated simply by being exposed to the sunshine It...

Page 46: ...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 C Indoor Heat Exchanger Thermistor 1 The indoor heat exchanger thermistor is used for controlling target discharge pipe temperature The system sets the target discharge pip...

Page 47: ...g include defrosting Note Unless specified otherwise an indoor dry operation command is regarded as cooling operation Air conditioner control mode Forced operating mode Forced cooling for Pump Down Operation Normal operating mode Cooling Stop mode except for cooling modes by indoor command Preheating operation During C capacitor is discharging Stop R2830 Air conditioner control mode Forced operati...

Page 48: ...functions Compressor protection input current discharge pipe temperature freeze up protection 3 Determine lower limit frequency The maximum value is set as an 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 Deter...

Page 49: ...volume airflow rate and other factors PI Control Determine Frequency 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 val...

Page 50: ...he discharge pipe temperature is below 10ºC the inverter operation in open phase starts OFF Condition When the discharge pipe temperature is higher than 12ºC the inverter operation in open phase stops RK X S25 35G2V1B9 RXS25 35J2V1B Outdoor temperature 7 C Control A Outdoor temperature 7 C Control B Control A ON condition Discharge pipe temperature 10 C OFF condition Discharge pipe temperature 12 ...

Page 51: ... frequency for a certain fixed time Detail Starting Conditions 1 When starting compressor for heating 2 When the operation mode changes to cooling from heating 3 When starting compressor for defrosting or resetting 4 When starting compressor for the first time after the reset with the power is ON 5 When starting compressor for heating next to the suspension of defrosting 6 When starting compressor...

Page 52: ...ep this temperature from going up further Detail Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Drooping zone The timer starts and the frequency is drooping Keep zone The upper limit of frequency is kept Up zone The upper limit of frequency is increased Reset zone The upper limit of frequency is canceled A ºC 110 B ºC 105 C ºC 101 D ºC 99 E ºC 97 R13529 Disc...

Page 53: ...tion frequency 2 Hz After this the output frequency is pulled down 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 drooping and stop value according to the outdoor temperature The current droops when outdoor temperature becomes higher than a certain level depending on the model R...

Page 54: ...exchanger temperature determines the frequency upper limit to prevent abnormal high pressure Detail R11261 Reset zone Heat exchanger thermistor temperature Up zone Keep zone Drooping zone Stop zone 0 C 5 C 7 C 9 C 11 C Reference Zone Control Stop zone When the temperature reaches the stop zone the compressor stops Drooping zone The timer starts and the frequency is drooping Keep zone The upper lim...

Page 55: ...e rotation speed of the outdoor fan is reduced by the command of the indoor outdoor quiet operation 7 Fan control for POWERFUL operation The rotation speed of the outdoor fan is increased while the POWERFUL operation 8 Fan speed control for pressure difference upkeep The rotation speed of the outdoor fan is controlled for keeping the pressure difference while cooling with low outdoor temperature W...

Page 56: ...ssor operates for 6 minutes More than A minutes of accumulated time pass since the start of the operation or ending the previous defrosting Conditions for Canceling Defrost The judgment is made with outdoor heat exchanger temperature J C RK X S25 35E2V1B RK X S25 35G2V1B RK X S25 35G2V1B9 RXS25 35J2V1B A minutes 28 28 B Hz 76 76 C Hz 86 86 D seconds 50 50 E seconds 60 60 F seconds 600 600 G second...

Page 57: ...ansion valve control when the discharge pipe thermistor is disconnected Feedback Control 1 Discharge pipe temperature control Detail The followings are the examples of control which function in each mode by the electronic expansion valve control R2833 Control when frequency changed Control for abnormally high discharge pipe temperature Operation pattern function not function When power is turned O...

Page 58: ...re When the compressor is operating if the discharge pipe temperature exceeds a certain value the electronic expansion valve opens and the refrigerant runs to the low pressure side This procedure lowers the discharge pipe temperature 3 11 6 Disconnection of the Discharge Pipe Thermistor Outline The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperatu...

Page 59: ... is changed for a specified value in a certain time period the target discharge pipe temperature control is canceled and the target opening of the electronic expansion valve is changed according to the shift 3 11 8 Target Discharge Pipe Temperature Control The target discharge pipe temperature is obtained from the indoor and outdoor heat exchanger temperature and the electronic expansion valve ope...

Page 60: ... 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 small comparing with that in the normal operation when refrigerant is insufficient and refrigerant shortage is detected by checking a power consumption II Detecting by discharge pipe temperature If the discharge pipe tempera...

Page 61: ...ystem Configuration 51 2 Operation Manual 52 2 1 Remote Controller 52 2 2 AUTO DRY COOL HEAT FAN Operation 53 2 3 Adjusting the Airflow Direction 55 2 4 POWERFUL Operation 57 2 5 OUTDOOR UNIT QUIET Operation 58 2 6 HOME LEAVE Operation 59 2 7 TIMER Operation 61 ...

Page 62: ...ver method of using it In order to meet this expectation of the users giving sufficient explanations taking enough time can be said to reduce about 80 of the requests for servicing However good the installation work is and however good the functions are the customer may blame either the room air conditioner or its installation work because of improper handling The installation work and handing ove...

Page 63: ...RFUL operation page 14 5 TEMPERATURE adjustment buttons It changes the temperature setting 6 ON OFF button Press this button once to start operation Press once again to stop it 7 MODE selector button It selects the operation mode AUTO DRY COOL HEAT FAN page 10 8 QUIET button OUTDOOR UNIT QUIET operation page 15 9 FAN setting button It selects the air flow rate setting 10 SWING button page 12 11 ON...

Page 64: ...he operation mode of your choice From the next time on the air conditioner will operate with the same operation mode Press to raise the temperature and press to lower the temperature To start operation To stop operation To change the temperature setting 1 Press MODE selector button and select a operation mode Each pressing of the button advances the mode setting in sequence 2 Press ON OFF button T...

Page 65: ...om gets warmer In heating operation frost may occur on the outdoor unit and lower the heating capacity In that case the system switches into defrosting operation to take away the frost During defrosting operation hot air does not flow out of indoor unit Note on COOL operation This air conditioner cools the room by blowing the hot air in the room outside so if the outside temperature is high perfor...

Page 66: ...on C O N 1 2 You can adjust the air flow direction to increase your comfort To adjust the horizontal blade flap 1 Press SWING button is displayed on the LCD and the flaps will begin to swing 2 When the flaps have reached the desired position press SWING button once more The flap will stop moving disappears from the LCD ...

Page 67: ...des Unless SWING is selected you should set the flap at a near horizontal angle in COOL or DRY mode to obtain the best performance In COOL or DRY mode if the flap is fixed at a downward position the flap automatically moves in about 60 minutes to prevent condensation on it ATTENTION Always use a remote controller to adjust the flap angle If you attempt to move it forcibly with hand when it is swin...

Page 68: ... which were used before POWERFUL operation When using POWERFUL operation there are some functions which are not available is displayed on the LCD 2 Press POWERFUL button again disappears from the LCD Notes on POWERFUL operation In COOL and HEAT mode To maximize the cooling heating effect the capacity of outdoor unit must be increased and the air flow rate be fixed to the maximum setting The temper...

Page 69: ...ET operation 1 Press QUIET button is displayed on the LCD 2 Press QUIET button again disappears from the LCD Note on OUTDOOR UNIT QUIET operation This function is available in COOL HEAT and AUTO modes This is not available in FAN and DRY mode 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 ...

Page 70: ...se the unit To change the recorded information repeat steps 1 3 To start HOME LEAVE operation To cancel HOME LEAVE operation 2 Press HOME LEAVE button again The HOME LEAVE lamp goes off 1 Press HOME LEAVE button The HOME LEAVE lamp lights up To set the temperature and air flow rate for HOME LEAVE operation When using HOME LEAVE operation for the first time please set the temperature and air flow r...

Page 71: ...g room when going to bed The unit will maintain the temperature in the room at a comfortable level while you sleep When you enter the living room in the morning the temperature will be just right Disengaging HOME LEAVE Operation will return the temperature to that set for normal operation Even the coldest winters will pose no problem Once you record the temperature and air flow rate settings you m...

Page 72: ...eaches the point you like Every pressing of either button increases or decreases the time setting by 10 minutes Holding down either button changes the setting rapidly 3 Press OFF TIMER button again The TIMER lamp lights up 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 ...

Page 73: ...2 Press TIMER Setting button until the time setting reaches the point you like Every pressing of either button increases or decreases the time setting by 10 minutes Holding down either button changes the setting rapidly 3 Press ON TIMER button again The TIMER lamp lights up 4 Press CANCEL button The TIMER lamp goes off Present time 11 00 p m The unit operating OFF TIMER at 0 00 a m ON TIMER at 7 0...

Page 74: ...alve Abnormality 82 4 14 Discharge Pipe Temperature Control 84 4 15 High Pressure Control in Cooling 85 4 16 Compressor System Sensor Abnormality 86 4 17 Position Sensor Abnormality 87 4 18 DC Voltage Current Sensor Abnormality 89 4 19 Thermistor or Related Abnormality Outdoor Unit 90 4 20 Electrical Box Temperature Rise 92 4 21 Radiation Fin Temperature Rise 95 4 22 Output Overcurrent Detection 9...

Page 75: ...thermistor malfunctions 2 When a signal transmission error occurs between the indoor and outdoor units In either case conduct the diagnostic procedure described in the following pages 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 microcom...

Page 76: ...eck the outdoor temperature Heating operation cannot be used when the outdoor temperature is 20 C or higher and cooling operation cannot be used when the outdoor temperature is below 10 C Diagnose with remote controller indication 69 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 Check for thermisto...

Page 77: ...equence shown below Note 1 A short beep pi and two consecutive beeps pi pi indicate non corresponding codes 2 To return to the normal mode hold the timer cancel button down for 5 seconds When the remote controller is left untouched for 60 seconds it also returns to the normal mode No Code No Code No Code 1 00 12 C7 23 H0 2 U4 13 H8 24 E1 3 F3 14 J3 25 P4 4 E6 15 A3 26 L3 5 L5 16 A1 27 L4 6 A6 17 C...

Page 78: ...e sound of beep or pi pi 3 Diagnose by the sound pi The figure of the ten s place does not accord with the error code pi pi The figure of the ten s place accords with the error code but the one s not beep The both figures of the ten s and one s place accord with the error code The figures indicated when you hear the beep sound are error code Refer to page 69 4 Press the MODE button The figure of t...

Page 79: ... both figures of the ten s and one s place accord with the error code 7 Determine the error code The figures indicated when you hear the beep sound are error code Error codes and description Refer to page 69 8 Press the MODE button to exit from the diagnosis mode The display means the trial operation mode Refer to page 214 for trial operation 9 Press the ON OFF button twice to return to the normal...

Page 80: ...ed abnormality 74 C9 Room temperature thermistor or related abnormality 74 Outdoor Unit E1 Outdoor unit PCB abnormality 77 E5 OL activation compressor overload 78 E6 Compressor lock 79 E7 DC fan lock 80 E8 Input overcurrent detection 81 EA Four way valve abnormality 82 F3 Discharge pipe temperature control 84 F6 High pressure control in cooling 85 H0 Compressor system sensor abnormality 86 H6 Posi...

Page 81: ...ction of connector Troubleshooting Note Check the following connector Check the combination of the indoor and outdoor unit OK Check the connection of connectors See Note Correct the connection OK Error repeats YES NO NO YES NO YES R11704 Caution To secure the connection once disconnect the connector and then reconnect it Match the compatible models Replace the indoor unit PCB 1 Replace the indoor ...

Page 82: ...ring heating operation the temperature detected by the indoor heat exchanger thermistor is used for the heating peak cut control operation halt outdoor fan stop etc Malfunction Decision Conditions Freeze up protection control During cooling operation the indoor heat exchanger temperature is below 0 C Heating peak cut control During heating operation the indoor heat exchanger temperature is above 6...

Page 83: ...ean the air filter Clean the indoor heat exchanger Replace the indoor unit PCB Replace the thermistor Does it conform to the thermistor characteristic chart Check the air filter Check the dust accumulation on the indoor heat exchanger Is there any short circuit Is it very dirty Is it very dirty Check the air passage Be sure to turn off the power switch before connecting or disconnecting connectors...

Page 84: ...n motor Defective indoor unit PCB Troubleshooting Check No 16 Refer to P 113 NO NO NO Check No 16 Check Hall IC NO NO NO YES YES YES YES YES YES R3869 Caution Replace the fan motor or indoor unit PCB Replace the fan motor Replace the indoor unit PCB Replace the capacitor Replace the indoor unit PCB Replace the fan motor Replace the fan motor Replace the indoor unit PCB Does the fan rotate Is there...

Page 85: ...ompressor operation Supposed Causes Disconnection of connector Defective thermistor Defective indoor unit PCB Troubleshooting Check No 06 Refer to P 106 C4 Indoor heat exchanger thermistor C9 Room temperature thermistor YES R7134 NO Check No 06 Check the thermistor resistance value YES NO Caution Correct the connection Replace the thermistor Replace the indoor unit PCB Is it normal Is it normal Ch...

Page 86: ...upply waveform Check the voltage of the connection wires on the indoor terminal board between No 1 and No 3 and between No 2 and No 3 YES YES Replace the indoor unit PCB Locate the cause of the disturbance of the power supply waveform and correct it NO R12160 NO YES YES NO NO Caution Correct the indoor unit outdoor unit connection wires Diagnose the outdoor unit PCB Before you check the LED A canc...

Page 87: ...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 88: ...ween PCBs Noise Momentary fall of voltage Momentary power failure etc Troubleshooting Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged NO YES YES R14186 YES NO NO Replace the outdoor unit PCB Ground the system Zero cross signal abnormality Replace the outdoor unit PCB Replace the harness Check to see if the outdoor unit is grounded ...

Page 89: ...ctive stop valve Troubleshooting Check No 04 Refer to P 104 Check No 05 Refer to P 105 Check No 06 Refer to P 106 Check No 11 Refer to P 108 R11999 Caution YES NG Discharge pipe thermistor NO OK OK NG Refrigerant shortage Water mixed Stop valve NG OK NG OK Insert the thermistor in position Replace the discharge pipe thermistor Replace the electronic expansion valve or the coil Refer to the refrige...

Page 90: ...0 Turn off the power Disconnect the harnesses U V and W R14098 Caution NO YES YES NO NO YES Check No 14 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 again Make sure the power has been off for at least 30 seconds Inverter checker Part No 1225477 Replace the compressor Replace the ...

Page 91: ... Supposed Causes Disconnection of the fan motor Foreign matters stuck in the fan Defective fan motor Defective outdoor unit PCB Troubleshooting Check No 15 Refer to P 112 R11708 Caution YES YES NO YES NO NO YES NO Turn on the power Rotate the fan Check No 15 Check the rotation pulse input on the outdoor unit PCB Turn off the power and reconnect the connector Remove them Replace the outdoor fan mot...

Page 92: ...e connecting or disconnecting connectors or parts may be damaged An input overcurrent may result from wrong internal wiring If the wires have been disconnected and reconnected for part replacement for example and the system is interrupted by an input overcurrent take the following procedure R14099 NO YES YES NO Start operation and measure the input current Check No 08 Check the discharge pressure ...

Page 93: ...e Malfunction Decision Conditions A following condition continues over 10 minutes after operating for 5 minutes Cooling Dry room thermistor temp indoor heat exchanger temp 5 C Heating indoor heat exchanger temp room thermistor temp 5 C 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 four way v...

Page 94: ... way valve defective or dust clogged Reconnect in position Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged R11710 Four way valve coil disconnected loose Harness out of connector Any thermistor disconnected Check No 06 Check the thermistors Check No 11 Check the refrigerant line Check No 05 Check the four way valve switching output ...

Page 95: ...gerant shortage Defective four way valve Water mixed in refrigerant Defective stop valve Defective outdoor unit PCB Troubleshooting Check No 04 Refer to P 104 Check No 06 Refer to P 106 Check No 11 Refer to P 108 Stop temperatures A C B C 1 above 45 Hz rising above 40 Hz dropping 110 97 2 30 45 Hz rising 25 40 Hz dropping 105 92 3 below 30 Hz rising below 25 Hz dropping 99 86 R7141 Caution NG Disc...

Page 96: ...oting Check No 04 Refer to P 104 Check No 06 Refer to P 106 Check No 07 Refer to P 107 Check No 08 Refer to P 107 Check No 09 Refer to P 108 A C B C RK X S25 35E2V1B RK X S25 35G2V1B 65 54 RK X S25 35G2V1B9 RXS25 35J2V1B 65 52 R11897 Caution Replace the fan motor Reconnect the connector or fan motor lead wires Replace the stop valve Replace the outdoor heat exchanger thermistor Replace the outdoor...

Page 97: ...onverted to voltage value The DC voltage before compressor start up is below 50 V Supposed Causes Broken or disconnection of 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 No problem Keep on running R...

Page 98: ...ssor running condition through the position detection circuit Malfunction Decision Conditions If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes 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 voltage is out of spec...

Page 99: ...00 NO NO NO YES YES NO YES YES Check No 29 Check the short circuit of the diode bridge Check No 14 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...

Page 100: ... frequency and the input current Malfunction Decision Conditions The compressor running frequency is above 52 Hz If the error repeats 4 times 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 disc...

Page 101: ...thermistor Malfunction Decision Conditions The thermistor input voltage is above 4 96 V or below 0 04 V with the power on J3 error is judged if the discharge pipe temperature is lower than the heat exchanger temperature Supposed Causes Disconnection of the connector for the thermistor Defective thermistor Defective heat exchanger thermistor in the case of J3 error outdoor heat exchanger thermistor...

Page 102: ...e following thermistors Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Radiation fin thermistor Cooling Outdoor heat exchanger temperature Heating Indoor heat exchanger temperature Replace the indoor heat exchanger thermistor Replace the outdoor unit PCB Replace the indoor unit PCB Error displayed again on remote controller Indoor heat exchanger thermist...

Page 103: ...ssor off the radiation fin temperature is above A C The error is cleared when the radiation fin temperature drops below B C To cool the electrical components the outdoor fan starts when the radiation fin temperature rises above C C and stops when it drops below B C Supposed Causes Defective outdoor fan motor Short circuit Defective radiation fin thermistor Disconnection of connector Defective outd...

Page 104: ...YES Fin thermistor NO Slightly dirty Malfunctioning Too dirty Functioning NO YES NO YES Turn off the power and turn it on again Check the radiation fin temperature Check No 07 Check the installation condition Radiation fin dirty Above A C Thermistor as specified in its characteristic chart Check No 06 Check the thermistor resistance value Check No 09 Check the outdoor fan or related Error again or...

Page 105: ... NO YES Turn off the power and turn it on again Check the radiation fin temperature Check No 07 Check the installation condition Radiation fin dirty Above A C Check No 09 Check the outdoor fan or related Error again or outdoor fan activated 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 dama...

Page 106: ...r on is above A C The error is cleared when the radiation fin temperature drops below B C 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 ...

Page 107: ...e radiation fin temperature Check No 07 Check the installation condition NO YES YES Radiation fin dirty Above A C Thermistor as specified in its characteristic chart Check No 06 Check the thermistor resistance value Check No 09 Check the outdoor fan or related Error displayed again Has PCB been replaced Replace the fin thermistor Check if the silicon grease applied properly on the radiation fin If...

Page 108: ...ES YES Above A C Radiation fin dirty Check No 09 Check the outdoor fan or related Error displayed again Has PCB been replaced Check if the silicon grease applied properly on the radiation fin If not apply it See Note Check the power transistor and the radiation fin for looseness If they are found to be fit tightly replace the outdoor unit PCB or the power transistor Clean up the radiation fin Sili...

Page 109: ...r occurs while the compressor is running A speed error occurs while the compressor is running An output overcurrent signal is fed from the output overcurrent detection circuit to the microcomputer If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes without any other error Supposed Causes Poor installation condition Closed stop valve Defective power modu...

Page 110: ...ule Check No 07 Check the installation condition Check No 14 Check with the inverter checker Turn off the power and disconnect the harnesses U V and W Turn off the 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 supply voltage Keep on using as it is Check the connectors ...

Page 111: ...age detection II The following conditions continue for 80 seconds Opening of the electronic expansion valve D Discharge pipe temperature E target discharge pipe temperature F Refrigerant shortage detection III When the difference of the temperature is smaller than G C it is regarded as refrigerant shortage If the error repeats 4 times the system is shut down Reset condition Continuous run for abou...

Page 112: ...e pipe flare or replace the union Check the power transistor harness for looseness Correct it as required Also replace the cracked pipe Check the pipes for improper contact Correct them as required Also replace the cracked pipe Replace the electronic expansion valve Replace the defective one s Completed Refrigerant shortage error again Oil oozing at internal piping Stop valve closed Compressor vib...

Page 113: ...tions Low voltage detection The voltage detected by the DC voltage detection circuit is below 150 180 V depending on the model Over voltage detection An over voltage signal is fed from the over voltage detection circuit to the microcomputer The voltage is over 400 V If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes without any other error Supposed Cau...

Page 114: ... before connecting or disconnecting connectors or parts may be damaged NO YES YES NO YES NO Replace the fan motor or the outdoor unit PCB Check the supply voltage Rotate the fan by hand 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 Turn on the power again System restarted Do...

Page 115: ...and check the continuity using a tester 4 Check the continuity between the pins 1 6 and 3 6 and between the pins 2 5 and 4 5 between the pins 1 6 2 6 3 6 4 6 for harness 5P model If there is no continuity between the pins the EV coil is faulty 5 If the continuity is confirmed in the above step 3 the outdoor unit PCB is faulty Note Please note that the latching sound varies depending on the valve t...

Page 116: ...coil from the connector and check the continuity Start heating operation Four way valve coil Cooling Dry No continuity Heating Continuity Replace the outdoor unit PCB Replace the four way valve coil Replace the four way valve Four way valve coil resistance at 1000 2000 Ω S80 voltage at 220 240 VAC with compressor on Fig 1 R11904 Fig 1 Voltage at S80 220 240 VAC Time Compressor ON ...

Page 117: ...ure and resistance is shown in the table and the graph below For the models in which the thermistor is directly mounted on the PCB disconnect the connector for the PCB and measure Thermistor temperature C Resistance kΩ 20 211 0 15 150 0 10 116 5 5 88 0 0 67 2 5 51 9 10 40 0 15 31 8 20 25 0 25 20 0 30 16 0 35 13 0 40 10 6 45 8 7 50 7 2 R25 C 20 kΩ B 3950 K R11905 Resistance range R11906 kΩ 150 100 ...

Page 118: ...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 46 C or lower R11718 Not dirty YES YES Dirty NO NO NO YES Is the air filter or indoor outdoor heat exchanger dirty Is the connectio...

Page 119: ...rm disturbance near the zero cross sections circled in Fig 2 5 8 Inverter Units Refrigerant System Check Check No 11 R7159 YES YES NO NO Outdoor fan system is functioning Check the outdoor fan system Go to Check No 15 Outdoor fan running Fan motor lead wire connector disconnected Reconnect the connector Fig 1 Fig 2 Refrigerant system check Check for refrigerant leakage See the service diagnosis on...

Page 120: ...ge the connector press the protrusion on the connector Follow the procedure below to measure resistance between the terminals of the DB1 and the terminals of the compressor with a multi tester Evaluate the measurement results for a judgment Negative terminal of tester positive terminal for digital tester DB1 UVW DB1 UVW Positive terminal of tester negative terminal for digital tester UVW DB1 UVW D...

Page 121: ...tage 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 re...

Page 122: ...eck 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 diagnose by the inverter checker be sure to re crimp...

Page 123: ...tation 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 Defective Hall IC Replace the ...

Page 124: ...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 Æ Defective PCB Æ Replace the PCB If NG in step 2 Æ Defective Hall IC Æ Replace the fan motor If OK in both steps 1 and 2 Æ Replace the PCB The connector has 3 pins 13 12 11 10 9 8 7 6 5 4 3 2 1 S70 Phase U ...

Page 125: ...the resistance between the pins of the DB1 as below If the resistance is or less than 1 kΩ short circuit occurs on the main circuit RK X S25 35E2V1B models terminal of the tester in case of digital terminal 2 3 4 2 3 1 terminal of the tester in case of digital terminal 4 2 3 1 2 3 Resistance in OK several kΩ several MΩ several kΩ several MΩ Resistance in NG 0 Ω or 0 0 0 Ω or R12412 1 2 3 4 Tester ...

Page 126: ...Check SiBE05 722_B 115 Service Diagnosis RK X S25 35G2V1B models RK X S25 35G2V1B9 RXS25 35J2V1B models R12411 4 3 2 1 Tester R12035 Tester 1 2 3 4 ...

Page 127: ...of PCB 145 2 4 Removal of Reactor Partition Plate 147 2 5 Removal of Sound Blankets 149 2 6 Removal of Four Way Valve 151 2 7 Removal of Compressor 154 3 Outdoor Unit RK X S25 35G2V1B 156 3 1 Removal of Outer Panels Fan Motor 156 3 2 Removal of Electrical Box 165 3 3 Removal of Thermistors 169 3 4 Removal of PCB 171 3 5 Removal of Reactor Partition Plate 174 3 6 Removal of Sound Blankets 176 3 7 R...

Page 128: ...ies before disassembling work Step Procedure Points 1 External appearance The illustrations are given as the ceiling suspended type Note The removal procedure is the same for the floor mounted type 2 Remove the air filters 1 Pull the protrusions on the both sides of the front grille and open it R2977 TIMER lamp yellow Operation lamp green ON OFF button HOME LEAVE lamp red Front grille R2978 ...

Page 129: ...l the air filter forward 3 Pull the air filter along the guide and remove it Installing air filters can be done easily by sliding along the guide 3 Remove the front grille 1 Remove the 2 grille fixtures right and left sides using a flat screwdriver Step Procedure Points Air filter R2980 R2982 Grille fixture ...

Page 130: ...asten the hooks at 3 locations 4 Remove the side cover 1 Remove the side cover Note If it is difficult to remove the side cover from outside with fingers remove the front panel first then push the side cover from inside to outside Step Procedure Points Front panel R2985 Side cover ...

Page 131: ...ter turning off all power supplies before disassembling work Step Procedure Points 1 Remove the 4 screws of the front panel Note For the ceiling suspended type remove drain hose before removing the screws 2 Remove the 3 screw covers at the front of the front panel 3 Remove the 3 screws Front panel R2986 To open the screw cover R14196 ...

Page 132: ...nded type be careful that the front panel may fall when the hooks are disengaged To prevent the front panel from falling down this work should be done by 2 persons 5 Press A section slightly at the center of the front panel and unfasten the hook 6 Remove the front panel Step Procedure Points Hook R2989 1 2 A R14197 ...

Page 133: ...f all power supplies before disassembling work Step Procedure Points 1 Open the horizontal blade 2 Deflect the 3 center bearings to the left side slightly and release the shafts of the horizontal blade 3 Bend the horizontal blade slightly to release the shafts from bearings at the both ends Release the left side shaft first Horizontal blade 1 2 R14198 ...

Page 134: ...Step Procedure Points 1 Remove the signal receiver unit 1 Unfasten the 2 hooks right and left sides to remove the signal receiver unit 2 Remove the wire harness of the signal receiver unit from the groove Note Rearrange the wire harness in position as it was when reassembling signal receiver unit 2 Remove the swing motor 1 Remove the 2 screws and remove the swing motor Signal receiver unit R2995 S...

Page 135: ...ocedure 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 2 screws 2 Unfasten the 2 hooks right and left sides and remove the discharge grille by pulling it forward Discharge grille R2999 ...

Page 136: ...all power supplies before disassembling work Step Procedure Points 1 Disconnect the drain hose Caution Be careful not to wet the floor with drain water 2 Remove the 3 screws securing the suction side of the drain pan 3 Unfasten the 2 hooks located at both sides 4 Slide the drain pan toward the suction side and remove it Drain hose R3002 Drain pan ...

Page 137: ...esses and wires with clips as they were when reassembling Negligence of above procedure may result in catching wire with the front panel and may cause malfunction 1 Disconnect the earth wire and pull out the indoor heat exchanger thermistor 2 Disconnect the 2 relay harnesses at the rear side of the fan motor 3 Remove the electrical box cover Unfasten the 2 hooks Indoor heat exchanger thermistor Ea...

Page 138: ...ws the control PCB Refer to page 16 for detail 5 Disconnect the terminals from the terminal board Step Procedure Points Power supply PCB R3009 Control PCB SW2 S7 S6 S24 S37 S32 S26 S21 R2958 R14206 Terminal board earth green yellow 1 black 2 white 3 red Power supply PCB ...

Page 139: ... page 16 for detail 2 Remove the electrical box Slide the electrical box to the right side first to unfasten the hooks 1 Remove the 2 screws Remove the electrical box by sliding it to unfasten the hooks located at the opposite side of the electrical box Step Procedure Points S36 FU1 V1 R2959 R3013 Hook ...

Page 140: ...assembling work Step Procedure Points 1 Remove the 3 fan rotor covers Securing hooks are located at A and B section The right illustration shows the opposite side 2 Disconnect the 2 relay harnesses at the rear side of the fan motor and unclamp the harness from the hook A section Fan rotor cover R3014 Fan rotor B section R3015 Hooks at B section R3016 Hooks at A section Fan motor R3017 ...

Page 141: ...he 2 screws to remove the fan motor fixtures 4 Remove the screw to remove the bearing fixture 5 Release the shaft supporting section using a hexagonal wrench for M6 to remove the fan motor Step Procedure Points Bearing fixture R3018 Bearing Fan motor fixture ...

Page 142: ...refrigerant pipe To prevent the indoor heat exchanger from falling down the work should be done by 2 persons 1 Disconnect the auxiliary flexible tube 2 Remove the 2 screws of the piping fixture Caution When removing or reinstalling the indoor heat exchanger be sure to wear protective gloves or wrap the indoor heat exchanger with cloths Fins can cut fingers 3 Remove the 2 screws at the left side of...

Page 143: ...ting of air or other gas causes abnormal temperature rise in refrigerating cycle and this results in pipe breakage or personal injuries Warning If gas leaks repair the spot of leaking then collect all refrigerant from the unit After conducting vacuum drying charge proper amount of refrigerant 5 Slide the indoor heat exchanger to the right to release the hook 6 Remove the indoor heat exchanger Step...

Page 144: ...more 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 The stop valve cover is united with the shield plate When reassembling make sure to fit the 5 hooks 1 Remove the screw of the stop valve cover Pull down the stop valve cover and remove it R1189...

Page 145: ...rews and lift the top panel 3 Remove the drip proof plate 4 Disconnect the connector for the fan motor S70 The fan motor is united with the front panel 5 Remove the 6 screws of the front panel Step Procedure Points Top panel R12413 R3240 Drip proof plate S70 R3241 R12414 Front panel ...

Page 146: ...ont panel has 4 hooks 3 Remove the fan motor The screw has reverse winding Nut size M6 1 Unscrew the washer fitted nut of the outdoor fan 2 Remove the outdoor fan When reassembling align mark of the outdoor fan with D cut section of the motor shaft Step Procedure Points Hooks R3243 Outdoor fan R14199 10 mm R12415 D cut R3245 ...

Page 147: ... mouth to unfasten the hooks 4 Remove the bell mouth 5 Open the hooks and release the fan motor lead wire When reassembling put the fan motor lead wire through the back of the fan motor so as not to be entangled with the outdoor fan Step Procedure Points R12422 Hooks Bell mouth R3249 Lead wire Outdoor fan ...

Page 148: ... 35E2V1B SiBE05 722_B 137 Removal Procedure 6 Remove the 4 screws and remove the fan motor M4 16 7 Remove the 2 screws and remove the fan motor fixing frame Step Procedure Points Fan motor R3250 R3251 Fan motor fixing frame ...

Page 149: ...al Procedure 138 4 Remove the right side panel 1 Remove the 2 screws on the rear side 2 Release the outdoor temperature thermistor 3 Lift up the guard net and remove it Step Procedure Points R7207 R7208 Outdoor temperature thermistor Guard net R7209 ...

Page 150: ...Outdoor Unit RK X S25 35E2V1B SiBE05 722_B 139 Removal Procedure 4 Remove the 4 screws on the right side panel 5 Remove the screw near the stop valves Step Procedure Points R7210 Right side panel R7211 ...

Page 151: ...5E2V1B Removal Procedure 140 6 Unfasten the hook on the rear side When reassembling make sure to fit the hook 7 Lift up the right side panel and remove it When reassembling make sure to fit the hook Step Procedure Points R7212 R7213 Hook ...

Page 152: ...assembling work Step Procedure Points 1 Remove the electrical box Preparation Remove the panels and disconnect the connector for the fan motor according to Removal of Outer Panels Fan Motor 1 Disconnect the 2 connectors for the reactor 2 Cut the clamp 3 Disconnect the connector for the compressor S30 When reassembling coil the excessive lead wire and hang the loop on the hook R7214 R7215 R7216 S30...

Page 153: ...Procedure 142 4 Disconnect the connector for the overload protector S40 5 Disconnect the connector for the electronic expansion valve coil S20 6 Disconnect the connector for the four way valve coil S80 Step Procedure Points R7217 S40 R7218 S20 R7219 S80 ...

Page 154: ... thermistor Be careful not to lose the clip for the thermistor 8 Cut the clamp 9 Pull out the outdoor heat exchanger thermistor Be careful not to lose the clip for the thermistor Step Procedure Points R0267 Discharge pipe thermistor R12279 Clip R7221 R7222 Outdoor heat exchanger thermistor Clip ...

Page 155: ...SiBE05 722_B Outdoor Unit RK X S25 35E2V1B Removal Procedure 144 10 Lift and remove the electrical box Step Procedure Points R7223 Electrical Box ...

Page 156: ... turning off all power supplies before disassembling work Step Procedure Points 1 Feature of the main PCB You can remove the main PCB when you disconnect the lead wires on the terminal board without removing the electrical box 2 Remove the screw on the terminal board 3 Release the 2 earth terminals R7255 R7256 Terminal board R7257 Earth terminal ...

Page 157: ...nfasten the 3 hooks on the upper side Lift and pull out the main PCB Refer to page 18 for detail S20 electronic expansion valve coil S30 compressor S40 overload protector S70 fan motor S80 four way valve coil S90 thermistors Step Procedure Points R7258 Screw R7259 R7260 S80 S20 S90 S30 S40 S70 ...

Page 158: ...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 2 Remove the partition plate 1 Remove the 2 screws R3266 Reactor Partition plate R3268 ...

Page 159: ... RK X S25 35E2V1B Removal Procedure 148 2 The partition plate has a hook on the lower side Lift and pull the partition plate to remove When reassembling fit the lower hook into the bottom frame Step Procedure Points R3270 Hook ...

Page 160: ...s or more 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 blanket carefully 2 Untie the string and open the sound blanket outer 3 Lift and remove the sound blanket outer R11884 Sound blanket top R7229 Sound blanket R7230 ...

Page 161: ...5 722_B Outdoor Unit RK X S25 35E2V1B Removal Procedure 150 4 Pull the sound blanket inner out 5 Pull the sound blanket bottom out Step Procedure Points R11887 Sound blanket inner Sound blanket bottom R11888 ...

Page 162: ...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 3 Disconnect the lead wires of the compressor R7233 Electronic expansion valve coil R7234 Terminal cover V W U R7235 Red U Yellow V Blue W ...

Page 163: ...xidation 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 For the sake of this wrap the four way valve with 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 restore 2 Cu...

Page 164: ...cutting pipes by all means because the sawdust comes into 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 Step Procedure Points R7250 ...

Page 165: ...l 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 For the sake of this wrap the four way valve with ...

Page 166: ...t comes into 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 fin 4 Lift the compressor up and remove it Step Procedure Points R12032 Suction side R...

Page 167: ... 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 The stop valve cover is united with the shield plate When reassembling make sure to fit the 5 hooks 1 Remove the screw of the stop valve cover Pull down the stop valve cover and remove it DAIKIN INVERTER...

Page 168: ...crews and lift the top panel 3 Remove the drip proof plate 4 Remove the 4 screws and remove the discharge grille The discharge grille has 4 hooks Step Procedure Points DAIKIN INVERTER Top panel R7190 DAIKIN INVERTER R7191 Drip proof plate DAIKIN INVERTER R7192 Discharge grille R7193 ...

Page 169: ...RK X S25 35G2V1B Removal Procedure 158 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 DAIKIN INVERTER R7194 Front panel R7195 Hooks ...

Page 170: ...The screw has reverse winding Nut size M6 1 Remove the washer fitted nut of the outdoor fan 2 Remove the outdoor fan When reassembling align mark of the outdoor fan with D cut section of the motor shaft 3 Cut the clamp Step Procedure Points R14200 Outdoor fan 10 mm R12236 D cut R7197 R7198 ...

Page 171: ... fan motor lead wire through the back of the fan motor so as not to be entangled with the outdoor fan 7 Remove the 4 screws and remove the fan motor Be sure to remove the lower screws first If the upper screws are removed first the fan motor the center of gravity of which is toward the front may tilt down or fall getting you injured Step Procedure Points R9332 S70 Fan motor lead wire R7200 R7201 R...

Page 172: ... 35G2V1B SiBE05 722_B 161 Removal Procedure 8 Remove the screw and remove the fan motor fixing frame When reassembling fit the lower hooks into the bottom frame Step Procedure Points R7204 Fan motor fixing frame R7205 R7206 ...

Page 173: ...al Procedure 162 4 Remove the right side panel 1 Remove the 2 screws on the rear side 2 Release the outdoor temperature thermistor 3 Lift up the guard net and remove it Step Procedure Points R7207 R7208 Outdoor temperature thermistor Guard net R7209 ...

Page 174: ...Outdoor Unit RK X S25 35G2V1B SiBE05 722_B 163 Removal Procedure 4 Remove the 4 screws on the right side panel 5 Remove the screw near the stop valves Step Procedure Points R7210 Right side panel R7211 ...

Page 175: ...5G2V1B Removal Procedure 164 6 Unfasten the hook on the rear side When reassembling make sure to fit the hook 7 Lift up the right side panel and remove it When reassembling make sure to fit the hook Step Procedure Points R7212 R7213 Hook ...

Page 176: ... disassembling work Step Procedure Points 1 Disconnect the 2 connectors for the reactor Preparation Remove the panels and disconnect the connector for the fan motor according to the Removal of Outer Panels Fan Motor 2 Cut the clamps at 2 locations 3 Disconnect the connector for the compressor S30 When reassembling coil the excessive lead wire and hang the loop on the hook R9338 R9339 R9340 S30 ...

Page 177: ...agnetic relay S50 and for the thermistors S90 5 Disconnect the connectors for the filter PCB S10 and for the overload protector S40 6 Disconnect the connectors for the electronic expansion valve coil S20 and for the four way valve coil S80 Step Procedure Points R9341 S90 S50 R9342 S40 S10 R9343 S80 S20 ...

Page 178: ...05 722_B 167 Removal Procedure 7 Disconnect the connectors for the filter PCB HL3 HN3 8 Remove the wire harness for standby electricity saving 9 Cut the clamps at 2 locations Step Procedure Points R9344 HN3 HL3 R9345 Wire harness R9346 ...

Page 179: ...SiBE05 722_B Outdoor Unit RK X S25 35G2V1B Removal Procedure 168 10 Lift and remove the electrical box Step Procedure Points R9348 Electrical box ...

Page 180: ...ff all power supplies before disassembling work Step Procedure Points 1 Release the discharge pipe thermistor Be careful not to lose the clip for the thermistor 2 Cut the clamp 3 Pull out the outdoor heat exchanger thermistor Be careful not to lose the clip for the thermistor R0267 Discharge pipe thermistor R12279 Clip R7221 R7222 Outdoor heat exchanger thermistor ...

Page 181: ...SiBE05 722_B Outdoor Unit RK X S25 35G2V1B Removal Procedure 170 4 Feature of the thermistors Step Procedure Points R9356 ...

Page 182: ...f all power supplies before disassembling work Step Procedure Points 1 Remove the main PCB You can remove the main PCB when you disconnect the lead wires on the terminal board without removing the electrical box 1 Feature of the main PCB 2 Remove the screw on the terminal board 3 Release the 2 earth terminals R9357 R7256 Terminal board R9358 Earth terminals ...

Page 183: ...E05 722_B Outdoor Unit RK X S25 35G2V1B Removal Procedure 172 4 Remove the 4 screws 5 Unfasten the 3 hooks on the upper side 6 Lift and pull out the main PCB Step Procedure Points R9359 Screws R9360 R9361 ...

Page 184: ...the main PCB Refer to page 20 for detail S10 HL3 HN3 filter PCB S20 electronic expansion valve coil S30 compressor S40 overload protector S50 magnetic relay S70 fan motor S80 four way valve coil S90 thermistors Step Procedure Points R12189 S10 S40 S90 S50 S70 S20 S80 HL3 HN3 S30 ...

Page 185: ... 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 2 Remove the partition plate 1 Remove the 2 screws R7224 Reactor R7225 R7226 Partition plate ...

Page 186: ...B SiBE05 722_B 175 Removal Procedure 2 The partition plate has a hook on the lower side Lift and pull the partition plate to remove When reassembling fit the lower hook into the bottom frame Step Procedure Points R7227 R7228 Hook ...

Page 187: ...d blanket top 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 Since the piping ports are torn easily remove the sound blanket carefully 2 Untie the string and open the sound blanket outer 3 Lift and remove the sound blanket outer 4 Pull the sound blanket inner out R7231 Sound blanket top R72...

Page 188: ...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 3 Disconnect the lead wires of the compressor R7233 Electronic expansion valve coil R7234 Terminal cover V W U R7235 Red U Yellow V Blue W ...

Page 189: ...xidation 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 For the sake of this wrap the four way valve with 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 restore 2 Cu...

Page 190: ...cutting pipes by all means because the sawdust comes into 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 Step Procedure Points R7250 ...

Page 191: ...l 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 For the sake of this wrap the four way valve with ...

Page 192: ...t comes into 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 fin 4 Lift the compressor up and remove it Step Procedure Points R12032 Suction side R...

Page 193: ...s or more 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 The stop valve cover is united with the shield plate When reassembling make sure to fit the 5 hooks 1 Remove the screw of the stop valve cover Pull down the stop valve cover and remove it ...

Page 194: ...the 2 screws and lift the top panel 3 Remove the drip proof plate 4 Remove the 4 screws and remove the discharge grille The discharge grille has 4 hooks Step Procedure Points DAIKIN INVERTER Top panel R7190 DAIKIN INVERTER R7191 Drip proof plate DAIKIN INVERTER R7192 Discharge grille R7193 ...

Page 195: ...35G2V1B9 RXS25 35J2V1B Removal Procedure 184 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 DAIKIN INVERTER R11825 Front panel R11826 Hooks ...

Page 196: ...nding Nut size M6 1 Remove the washer fitted nut of the outdoor fan 2 Remove the outdoor fan When reassembling align mark of the outdoor fan with D cut section of the motor shaft 3 Release the outdoor temperature thermistor Step Procedure Points R14201 Outdoor fan 10 mm R12236 R11828 D cut R11829 Outdoor temperature thermistor ...

Page 197: ...X S25 35G2V1B9 RXS25 35J2V1B Removal Procedure 186 4 Cut the clamp 5 Disconnect the connector for the fan motor S70 6 Release the fan motor lead wire from the hook Step Procedure Points R11830 R11831 S70 R11832 Fan motor lead wire ...

Page 198: ... RXS25 35J2V1B SiBE05 722_B 187 Removal Procedure 7 Remove the screw and remove the fan motor fixing frame When reassembling fit the lower hooks into the bottom frame Step Procedure Points R11833 Fan motor fixing frame R12314 R7206 ...

Page 199: ... wire When reassembling put the fan motor lead wire through the back of the fan motor so as not to be entangled with the outdoor fan 9 Remove the 4 screws and remove the fan motor 4 Remove the right side panel 1 Remove the 2 screws on the rear side Step Procedure Points R11835 R3249 Lead wire Outdoor fan R12311 Fan motor R12162 ...

Page 200: ...722_B 189 Removal Procedure 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 R12163 Right side panel R11839 R11842 ...

Page 201: ... X S25 35G2V1B9 RXS25 35J2V1B Removal Procedure 190 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 R12272 Hook R11841 Guard net ...

Page 202: ...all power supplies before disassembling work Step Procedure Points 1 Disconnect the connector for the overload protector S40 Preparation Remove the 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 R11846 S40 R11848 S80 R11844 ...

Page 203: ...ctor for the compressor 5 Disconnect the connector for the electronic expansion valve coil S20 6 Cut the clamp 7 Pull out the outdoor heat exchanger thermistor Be careful not to lose the clip for the thermistor Step Procedure Points R11845 R11847 S20 R11850 R11851 Outdoor heat exchanger thermistor R3264 Clip ...

Page 204: ...BE05 722_B 193 Removal Procedure 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 Discharge pipe thermistor R11849 R12279 Clip R11852 Electrical Box ...

Page 205: ...ning off all power supplies before disassembling work Step Procedure Points 1 Remove the main PCB You can remove the main PCB when you disconnect the lead wires on the terminal board without removing the electrical box 1 Feature of the main PCB 2 Remove the screw on the terminal board 3 Release the 2 earth terminals R11853 R11854 Terminal board R11855 Earth terminal ...

Page 206: ...orced 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 Disconnect the relay connector 6 Cut the clamp Step Procedure Points Forced operation button PCB R11856 R11857 R11858 ...

Page 207: ...door Unit RK X S25 35G2V1B9 RXS25 35J2V1B Removal Procedure 196 7 Release the harness 8 Cut the clamps at the 2 locations 9 Disconnect the connector for the filter PCB S10 Step Procedure Points R11859 R11860 R11861 S10 ...

Page 208: ...nectors for the magnetic relay S50 and for the forced operation button PCB S100 11 Disconnect the connector for the filter PCB HL3 HN3 12 Release the harnesses from the hook 13 Release the harness for the outdoor temperature thermistor Step Procedure Points R11862 S100 S50 HL3 HN3 R11863 R11864 R11865 ...

Page 209: ...ks and remove the main PCB Refer to page 22 for detail S10 HL3 HN3 filter PCB S20 electronic expansion valve coil S40 overload protector S50 magnetic relay S70 fan motor S80 four way valve coil S90 thermistors S100 forced operation button PCB Step Procedure Points R11866 R11867 R11868 S50 S100 S90 S10 HN3 HL3 S80 S20 S40 S70 ...

Page 210: ...G2V1B9 RXS25 35J2V1B SiBE05 722_B 199 Removal Procedure 2 Remove the filter PCB 1 Release the harnesses from the hook 2 Cut the clamp 3 Release the harnesses from the hook Step Procedure Points R11869 Filter PCB R11871 R11872 ...

Page 211: ...K X S25 35G2V1B9 RXS25 35J2V1B Removal Procedure 200 4 Release the harnesses from the hooks 5 Remove the screw 6 Unfasten the 2 hooks 7 Lift and pull out the filter PCB Step Procedure Points R11873 R11874 R11876 Filter PCB R11877 ...

Page 212: ...Outdoor Unit RK X S25 35G2V1B9 RXS25 35J2V1B SiBE05 722_B 201 Removal Procedure 8 Feature of the filter PCB Refer to page 22 for detail Step Procedure Points R11878 ...

Page 213: ...ng 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 2 Remove the partition plate 1 Remove the 2 screws R11879 Reactor R11880 R12273 Partition plate ...

Page 214: ...25 35J2V1B SiBE05 722_B 203 Removal Procedure 2 The partition plate has a hook on the lower side Lift and pull the partition plate to remove When reassembling fit the lower hook into the bottom frame Step Procedure Points R12280 R11883 ...

Page 215: ...utes or more 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 blanket carefully 2 Untie the string and open the sound blanket outer 3 Lift and remove the sound blanket outer R11884 Sound blanket top R11885 Sound blanket outer R11886 ...

Page 216: ...RK X S25 35G2V1B9 RXS25 35J2V1B SiBE05 722_B 205 Removal Procedure 4 Pull the sound blanket inner out 5 Pull the sound blanket bottom out Step Procedure Points R11887 Sound blanket inner Sound blanket bottom R11888 ...

Page 217: ...ure 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 3 Disconnect the lead wires of the compressor R7233 Electronic expansion valve coil R7234 Terminal cover V W U R7235 Red U Yellow V Blue W ...

Page 218: ...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 For the sake of this wrap the four way valve with 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 rest...

Page 219: ...saw for cutting pipes by all means because the sawdust comes into 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 Step Procedure Points R7250 ...

Page 220: ... 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 For the sake of this wrap the four way valve...

Page 221: ...e sawdust comes into 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 fin 4 Lift the compressor up and remove it Step Procedure Points R12032 Suctio...

Page 222: ...ced Cooling Operation 213 3 Trial Operation 214 4 Field Settings 215 4 1 When 2 Units are Installed in 1 Room 215 4 2 Standby Electricity Saving 216 4 3 Facility Setting Jumper cooling at low outdoor temperature 217 4 4 Jumper and Switch Settings 218 5 Application of Silicon Grease to a Power Transistor and a Diode Bridge 219 ...

Page 223: ...t Detail 1 Remove the valve caps from the liquid stop valve and the gas stop valve 2 Carry out forced cooling operation 3 After 5 to 10 minutes close the liquid stop valve with a hexagonal wrench 4 After 2 to 3 minutes close the gas stop valve and stop the forced cooling operation Refer to page 213 for forced cooling operation Gas stop valve Valve cap Close Liquid stop valve Service port R13628 He...

Page 224: ... indoor unit for 5 seconds 2 Press the forced cooling operation ON OFF button SW1 on the outdoor unit with standby electricity saving function turned off Command frequency RK X S25 35E2V1B RK X S25 35G2V1B 68 Hz RK X S25 35G2V1B9 RXS25 35J2V1B 58 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 th...

Page 225: ...m then restarts operation with the previous mode when the circuit breaker is restored In cooling mode select the lowest programmable temperature in heating mode select the highest programmable temperature Trial operation may be disabled in either mode depending on the room temperature After trial operation is complete set the temperature to a normal level 26 C to 28 C in cooling mode 20 C to 24 C ...

Page 226: ...m 1 of the 2 pairs of indoor unit and wireless remote controller can be set for different address 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 ADDRESS JA EXIST 1 CUT 2 R12419 Address EXIST CUT 1 2 Jumper R14202 ...

Page 227: ...Following procedure is required for turning ON the function 1 Check that the main power supply is turned OFF Turn OFF if it has not been turned OFF 2 Remove the stop valve cover 3 Disconnect the selective connector for standby electricity saving 4 Turn ON the main power supply Caution Before connecting or disconnecting the selective connector for standby electricity saving make sure that the main ...

Page 228: ... the outdoor temperature rises the operation starts again RKS25 35E2V1B RKS25 35G2V1B RKS25 35G2V1B9 Caution 1 If the outdoor unit is installed where the outdoor heat exchanger of the unit is exposed to direct wind provide a windbreak wall 2 Intermittent noises may be produced by the indoor unit due to the outdoor fan turning on and off when using facility settings 3 Do not place humidifiers or ot...

Page 229: ... setting when compressor stops for thermostat OFF effective only at cooling operation Fan speed setting Remote controller setting Fan rpm is set to 0 Fan stop JC on indoor unit PCB Power failure recovery function Auto restart The unit does not resume operation after recovering from a power failure Timer ON OFF settings are cleared J5 on outdoor unit PCB Improvement of defrost performance Standard ...

Page 230: ...or encouraging the heat radiation of the power transistor and the diode bridge Applying the paste should be implemented in accordance with the following instruction Remark There is the possibility of failure with smoke in case of bad heat radiation Wipe off the old silicon grease completely on a radiation fin Apply the silicon grease evenly to the whole Do not leave any foreign object such as sold...

Page 231: ...SiBE05 722_B Appendix 220 Part 9 Appendix 1 Piping Diagrams 221 1 1 Indoor Unit 221 1 2 Outdoor Unit 222 2 Wiring Diagrams 224 2 1 Indoor Unit 224 2 2 Outdoor Unit 224 ...

Page 232: ...OW COOLING INDOOR UNIT 6 4CuT SIROCCO FAN 9 5CuT FAN MOTOR M HEAT EXCHANGER THERMISTOR ON HEAT EXCH FIELD PIPING 6 4CuT FIELD PIPING 9 5CuT 4D034012E FIELD PIPING 6 4CuT FIELD PIPING 9 5CuT INDOOR UNIT 6 4CuT SIROCCO FAN 9 5CuT FAN MOTOR M HEAT EXCHANGER REFRIGERANT FLOW COOLING HEATING 4D048722B THERMISTOR ON HEAT EXCH ...

Page 233: ...MUFFLER WITH FILTER MOTOR OPERATED VALVE MUFFLER WITH FILTER LIQUID STOP VALVE GAS STOP VALVE FOUR WAY VALVE NORMALLY OFF DISCHARGE PIPE THERMISTOR 3D047318G OUTDOOR UNIT HEAT EXCHANGER 7 0CuT 7 0CuT 9 5CuT 4 8CuT 6 4CuT 6 4CuT 4 8CuT M PROPELLER FAN φ 4 0 ID 2 0CuT 9 5CuT 9 5CuT 6 4CuT 7 9CuT 9 5CuT MUFFLER 9 5CuT 9 5CuT COMPRESSOR MUFFLER MUFFLER 7 9CuT ACCUMULATOR REFRIGERANT FLOW COOLING OUTDO...

Page 234: ...FFLER WITH FILTER MUFFLER WITH FILTER LIQUID STOP VALVE GAS STOP VALVE DISCHARGE PIPE THERMISTOR MOTOR OPERATED VALVE FOUR WAY VALVE ON HEATING 3D047316Q 7 9CuT 7 9CuT 7 0CuT M HEAT EXCHANGER MUFFLER 6 4CuT FIELD PIPING 9 5CuT 9 5CuT HEATING 6 4CuT FIELD PIPING 6 4CuT 9 5CuT 6 4CuT MUFFLER 9 5CuT REFRIGERANT FLOW 7 0CuT COOLING φ 4 0 ID 2 0CuT 4 8CuT PROPELLER FAN COMPRESSOR OUTDOOR UNIT 9 5CuT 4 ...

Page 235: ...C100 MRM10 MRM20 7 1 HC1 3 S11 WHT BLK BLK BLK BLK BLK BLK HR1 HN2 HL2 ORG GRY BLU 1 7 1 WHT S10 YLW S20 M ORG BLU L1R Y1E BRN 6 RED 3 15A MRCW S80 HL3 FU1 HN3 YLW BRN ORG 1 Y1R V1 HR2 3 OUTDOOR DB1 IC11 _ PCB2 R1T 1 CONDENSER BLK t BLK S90 HC3 R2T BLK DB2 t _ BLK DISCHARGE R3T BLK 6 t BLK S70 C74 C75 1 HC4 WHT 2 ORG 1 _ _ 3 M BRN 4 M1F BLU _ _ C94 3 15A 7 FU2 RED C95 BLK 2 BLK Q1L R12T S40 BLK GR...

Page 236: ...OR MRCW MR30 MRM10 MRM20 MAGNETIC RELAY N NEUTRAL Q1L OVERLOAD PROTECTOR 3D058684B FIELD WIRING indoor MRM20 N 2 WHT IPM1 FU3 Z3C X1M DB1 L1R HR1 20A HR2 AC1 L1 BRN L 1 BLK 1 MRM10 AC2 HN3 V2 WHT 2 2 N DB2 HN2 C5 HA2 HA1 S BLU GRY RED 3 3 HL3 C119 HL2 V3 ORG C6 FU1 L Q1 MR30 3 15A 1 WHT 1 V1 BLK N PCB2 DB3 BLK FU2 BLK 3 15A GRN YLW SA1 S11 S10 BLK BLK E1 W V U BLK IPM2 BLK 9 9 BLK MR30_B E2 MR30_A...

Page 237: ...l carefully before using this product The User s Manual provides important safety instructions and warnings Be sure to follow these instructions and warnings If you have any enquiries please contact your local importer distributor and or retailer Cautions on product corrosion 1 Air conditioners should not be installed in areas where corrosive gases such as acid gas or alkaline gas are produced 2 I...

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