Daikin Inverter FTXL20G2V1B User Manual Download

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SiENBE04-925_A

Service

Manual

Inverter Pair

Wall Mounted Type G-Series

[Applied Models]

Inverter Pair: Heat Pump

SIENBE04-925_A_FRONT.pdf 1

24/02/2011 13:53:43

Summary of Contents for Inverter FTXL20G2V1B

Page 1: ...SiENBE04 925_A Service Manual Inverter Pair Wall Mounted Type G Series Applied Models z Inverter Pair Heat Pump...

Page 2: ...SiENBE04 925_A Service Manual Inverter Pair Wall Mounted Type G Series Applied Models z Inverter Pair Heat Pump...

Page 3: ...SiENBE04 925_A Table of Contents i Inverter Pair Wall Mounted Type G Series zHeat Pump Indoor Units FTXL20G2V1B FTXL25G2V1B FTXL35G2V1B Outdoor Units RXL20G2V1B RXL20G2V1B9 RXL25G2V1B RXL35G2V1B...

Page 4: ...stat Control 26 1 7 NIGHT SET Mode 27 1 8 ECONO Operation 28 1 9 2 Area INTELLIGENT EYE Operation 29 1 10 Inverter POWERFUL Operation 31 1 11 Other Functions 32 2 Function of Thermistor 33 3 Control S...

Page 5: ...t 82 4 7 Unspecified Voltage between Indoor Unit and Outdoor Unit 83 4 8 Outdoor Unit PCB Abnormality 84 4 9 OL Activation Compressor Overload 86 4 10 Compressor Lock 87 4 11 DC Fan Lock 88 4 12 Input...

Page 6: ...97 3 5 Removal of Reactor Partition Plate 205 3 6 Removal of Sound Blanket 207 3 7 Removal of Four Way Valve 209 3 8 Removal of Compressor 212 4 Outdoor Unit RXL25G2V1B 214 4 1 Removal of Outer Panels...

Page 7: ...g 269 2 3 Jumper and Switch Settings 270 3 Application of Silicon Grease to a Power Transistor and a Diode Bridge 271 Part 9 Appendix 272 1 Piping Diagrams 273 1 1 Indoor Unit 273 1 2 Outdoor Unit 274...

Page 8: ...SiENBE04 925_A vi Table of Contents...

Page 9: ...power 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 shook If it is necessary to s...

Page 10: ...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...

Page 11: ...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 t...

Page 12: ...ent 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 o...

Page 13: ...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...

Page 14: ...Introduction SiENBE04 925_A xii...

Page 15: ...SiENBE04 925_A List of Functions 1 Part 1 List of Functions 1 Functions 2...

Page 16: ...after Power Failure Horizontal Auto Swing Right and Left Self Diagnosis Digital LED Display 3 D Airflow Wiring Error Check COMFORT AIRFLOW Operation Anti Corrosion Treatment of Outdoor Heat Exchanger...

Page 17: ...SiENBE04 925_A Specifications 3 Part 2 Specifications 1 Specifications 4...

Page 18: ...rd Air Filter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 12 0 12 0 11 0 13 0 13 0 12 0 12 0 12 0 11 0 13 0 13 0 12 Power Consumption Rated W 26 26 26 28...

Page 19: ...ilter Removable Washable Mildew Proof Removable Washable Mildew Proof Running Current Rated A 0 11 0 11 0 10 0 14 0 14 0 13 0 12 0 12 0 11 0 15 0 14 0 14 Power Consumption Rated W 24 24 24 30 30 30 26...

Page 20: ...Specifications SiENBE04 925_A 6 Specifications...

Page 21: ...NBE04 925_A Printed Circuit Board Connector Wiring Diagram 7 Part 3 Printed Circuit Board Connector Wiring Diagram 1 Printed Circuit Board Connector Wiring Diagram 8 1 1 Indoor Unit 8 1 2 Outdoor Unit...

Page 22: ...swing motors 6 S46 Connector for display PCB 7 S47 Connector for signal receiver PCB 8 H1 H2 H3 FG Connector for terminal board 9 JA Address setting jumper Refer to page 268 for detail JB Fan speed s...

Page 23: ...04 925_A Printed Circuit Board Connector Wiring Diagram Printed Circuit Board Connector Wiring Diagram 9 PCB Detail PCB 1 Control PCB V1 FU1 S1 S41 S21 S47 JB JA JC S46 S25 LED A S32 FG H1 H2 H3 2P206...

Page 24: ...or Wiring Diagram SiENBE04 925_A 10 Printed Circuit Board Connector Wiring Diagram PCB 4 INTELLIGENT EYE Sensor PCB PCB 2 Signal Receiver PCB PCB 3 Display PCB 3P210728 1 S48 3P210728 1 RTH1 SW1 S49 L...

Page 25: ...use 20 A 250 V 8 V2 V3 Varistor 1 S10 Connector for filter PCB 2 S20 Connector for electronic expansion valve coil 3 S30 Connector for compressor 4 S40 Connector for overload protector 5 S50 Connector...

Page 26: ...ENBE04 925_A 12 Printed Circuit Board Connector Wiring Diagram 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 S90...

Page 27: ...ter PCB 2 S20 Connector for electronic expansion 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 c...

Page 28: ...t Board Connector Wiring Diagram PCB Detail PCB 1 Filter PCB PCB 2 Main PCB PCB 3 Forced Operation Button PCB HR1 HL2 3P254234 1 FU1 HN2 S FU3 AC2 E1 E2 AC1 S11 V3 V2 S50 on main PCB S10 J5 S90 FU2 S1...

Page 29: ...ector for fan motor 4 S80 Connector for four way valve coil 5 S90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 6 U V W Connector for compressor 7 HL1 HN1 S Conne...

Page 30: ...Board Connector Wiring Diagram SiENBE04 925_A 16 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB 1 Control PCB HN1 HL1 E E2 S V1 FU1 LED A S80 S20 S90 S70 HR2 HR1 FU2 S40 J5 U V W 2P208...

Page 31: ...itor PCB 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 AC1 AC2 Connector for termina...

Page 32: ...NBE04 925_A 18 Printed Circuit Board Connector Wiring Diagram PCB Detail PCB 1 Main PCB PCB 2 Service Monitor PCB V3 V11 AC1 FU2 E1 E2 HR1 HR2 FU3 W 2P169046 5 S40 S20 V U S70 S90 S51 S10 AC2 S101 V5...

Page 33: ...nverter POWERFUL Operation 31 1 11 Other Functions 32 2 Function of Thermistor 33 3 Control Specification 34 3 1 Mode Hierarchy 34 3 2 Frequency Control 35 3 3 Controls at Mode Changing Start up 37 3...

Page 34: ...ted by additional parameters in the following cases Frequency restrictions Initial settings Forced cooling operation Inverter Principle To regulate the capacity a frequency control is needed The inver...

Page 35: ...ce 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...

Page 36: ...he auto swing process for cooling dry heating and fan 3 D Airflow Alternative repetition of vertical and horizontal swing motions enables uniform air conditioning of the entire room This function is e...

Page 37: ...n automatic fan speed operation upper limit is at M tap in 30 minutes from the operation start Heating On heating mode the fan speed is regulated according to the indoor heat exchanger temperature and...

Page 38: ...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 a...

Page 39: ...ion 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...

Page 40: ...eturns to the zone C after 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 tempe...

Page 41: ...then automatically 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...

Page 42: ...NO button When this function is activated the maximum capacity also decreases The remote control can send the ECONO command when the unit is in COOL HEAT DRY or AUTO operation This function can only b...

Page 43: ...the indoor unit carries out a sampling every 20 msec and if it detects 10 cycles of the wave in one second in total corresponding to 20 msec 10 200 msec and when the ON signal continues 3 sec it judg...

Page 44: ...ift the airflow direction to area B left side 2 Detection signal ON in area A Shift the airflow direction to area B left side 3 Detection signal ON in area B Shift the airflow direction to area A righ...

Page 45: ...0 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 5 C HEAT H tap 50 rpm 31 C FAN H tap 50 rp...

Page 46: ...ton for 5 to 9 seconds while the unit is not operating Refer to Forced operation mode on page 48 for detail Note When the ON OFF button is pressed for 10 seconds or more the forced operation is stoppe...

Page 47: ...ge pipe temperature 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 d...

Page 48: ...Detail There are following modes stop cooling includes drying heating include defrosting Note Unless specified otherwise an indoor dry operation command is regarded as cooling operation Air conditione...

Page 49: ...n upper limit frequency among the frequency upper limits of the following functions Compressor protection input current discharge pipe temperature heating peak cut freeze up protection defrost 3 Deter...

Page 50: ...ency does not change for more than a certain fixed time the frequency is adjusted according to the D value When the D value is small the frequency is lowered When the D value is large the frequency is...

Page 51: ...peration in open phase stops RXL20G2V1B9 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 tempera...

Page 52: ...ompressor 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 wit...

Page 53: ...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 lim...

Page 54: ...cy 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...

Page 55: ...termines the frequency upper limit to prevent abnormal high pressure Detail R4561 Reset zone Indoor heat exchanger thermistor temperature Up zone Keep zone Drooping zone Stop zone 0 C 5 5 C 7 5 C 9 5...

Page 56: ...on 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 o...

Page 57: ...on The compressor operates for 6 minutes More than minutes of accumulated time pass since the start of the operation or ending the previous defrosting Conditions for Canceling Defrost The judgment is...

Page 58: ...trol 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 elect...

Page 59: ...g 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...

Page 60: ...ied 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 Di...

Page 61: ...on 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 t...

Page 62: ...outdoor unit is not abnormal and not in the 3 minute standby mode 2 The outdoor unit is not operating The forced operation is allowed when the above both conditions are met Start 1 Press the forced o...

Page 63: ...peration Manual 51 2 1 Auto Dry Cool Heat Fan Operation 52 2 2 Adjusting the Airflow Direction 54 2 3 COMFORT AIRFLOW and INTELLIGENT EYE Operation 56 2 4 POWERFUL Operation 59 2 5 OUTDOOR UNIT QUIET...

Page 64: ...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 in...

Page 65: ...ce to start operation Press once again to stop it 6 TEMPERATURE adjustment buttons It changes the temperature setting 7 MODE selector button It selects the operation mode AUTO DRY COOL HEAT FAN 8 QUIE...

Page 66: ...ssing of the button advances the mode setting in sequence AUTO DRY COOL HEAT FAN 2 Press ON OFF button ON is displayed on the LCD The OPERATION lamp lights up To stop operation 3 Press ON OFF button a...

Page 67: ...itches into defrosting operation to take away the frost During defrosting operation hot air does not flow out of indoor unit A pinging sound may be heard during defrosting operation which however does...

Page 68: ...splayed 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 flaps will stop moving disappears from the LCD To adjust the ve...

Page 69: ...ional 3 D Airflow Using three dimensional airflow circulates cold air which tends to collected at the bottom of the room and hot air which tends to collect near the ceiling throughout the room prevent...

Page 70: ...the COMFORT SENSOR button is pressed a different setting option is displayed on the LCD To cancel operation 2 Press COMFORT SENSOR button Press the button to select Blank 1 2 Blank Display Operation...

Page 71: ...justments The flaps will move upward while cooling so that the airflow will be directed upward The flaps will move downward while heating so that the airflow will be directed downward Cooling operatio...

Page 72: ...functions simultaneously When both of them are in use the air conditioner will not direct the airflow towards the people Sensor may not detect moving objects further than 5m away Check the applicatio...

Page 73: ...tion cannot be used together with ECONO QUIET or COMFORT Operation Priority is given to the function of whichever button is pressed last POWERFUL Operation can only be set when the unit is running Pre...

Page 74: ...on the LCD To cancel OUTDOOR UNIT QUIET operation 2 Press QUIET button again disappears from the LCD Notes on COMFORT AIRFLOW operation This function is available in COOL HEAT and AUTO modes This is...

Page 75: ...ONO mode vary with the connecting outdoor unit Notes on ECONO operation ECONO Operation can only be set when the unit is running Pressing the OFF button causes the setting to be canceled and the disap...

Page 76: ...ing by 10 minutes Holding down either button changes the setting rapidly 3 Press OFF TIMER button again The TIMER lamp lights up To cancel the OFF TIMER operation 4 Press CANCEL button The TIMER lamp...

Page 77: ...e setting by 10 minutes Holding down either button changes the setting rapidly 3 Press ON TIMER button again The TIMER lamp lights up To cancel the ON TIMER operation 4 Press CANCEL button The TIMER l...

Page 78: ...tings for example makes it possible to schedule operating mode and set temperature changes Furthermore by using OFF OFF OFF OFF settings only the turn OFF time of each day can be set This will turn OF...

Page 79: ...elect the desired mode Pressing the SELECT button changes ON or OFF setting in sequence In case the reservation has already been set selecting blank deletes the reservation Go to STEP 9 if blank is se...

Page 80: ...e week Refer to Copy mode Notes on WEEKLY TIMER operation Do not forget to set the clock on the remote control first The day of the week ON OFF TIMER mode time and set temperature only for ON TIMER mo...

Page 81: ...of the week 5 Press COPY button The reservation will be copied to the selected day of the week The whole reservation of the selected day of the week will be copied To continue copying the settings to...

Page 82: ...med 1 Press button The day of the week and the reservation number of the current day will be displayed 2 Press SELECT button to select the day of the week and the reservation number to be confirmed Pr...

Page 83: ...to Setting mode When selecting desired mode at STEP 4 in setting mode select blank The reservation will be deleted The reservations for each day of the week This function can be used for deleting res...

Page 84: ...it PCB Abnormality 84 4 9 OL Activation Compressor Overload 86 4 10 Compressor Lock 87 4 11 DC Fan Lock 88 4 12 Input Overcurrent Detection 89 4 13 Four Way Valve Abnormality 90 4 14 Discharge Pipe Te...

Page 85: ...rotection device of the indoor or outdoor unit is activated or when the thermistor malfunctions 2 When a signal transmission error occurs between the indoor and outdoor units In either case conduct th...

Page 86: ...ting 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 control indication 75...

Page 87: ...quence 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 remot...

Page 88: ...the figure until you hear the sound of beep or pi pi 3 Diagnose by the sound H pi The figure of the ten s place does not accord with the error code H pi pi The figure of the ten s place accords with t...

Page 89: ...ep The 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 Ref...

Page 90: ...normality 81 Outdoor Unit E1 Outdoor unit PCB abnormality 84 E5H OL activation compressor overload 86 E6H Compressor lock 87 E7 DC fan lock 88 E8 Input overcurrent detection 89 EA Four way valve abnor...

Page 91: ...on 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 r...

Page 92: ...ing 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 Free...

Page 93: ...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 accumul...

Page 94: ...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 ma...

Page 95: ...e 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 Tur...

Page 96: ...mpressor operation Supposed Causes Disconnection of connector Defective thermistor Defective indoor unit PCB Troubleshooting Check No 06 Refer to P 120 C4 Indoor heat exchanger thermistor C9 Room temp...

Page 97: ...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 distur...

Page 98: ...iring of connecting wires Wrong indoor unit PCB or outdoor unit PCB mounted Defective indoor unit PCB Defective outdoor unit PCB Troubleshooting R11707 Caution NO YES YES YES NO NO Check the code numb...

Page 99: ...Bs Noise Momentary fall of voltage Momentary power failure etc Troubleshooting 20 35 class Caution Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be da...

Page 100: ...y Replace the outdoor unit PCB Replace the harness Check to see if the outdoor unit is grounded Is LED A blinking Grounded NO Replace the connecting wires between the indoor and outdoor units Check th...

Page 101: ...tive stop valve Troubleshooting Check No 04 Refer to P 118 Check No 05 Refer to P 119 Check No 06 Refer to P 120 Check No 11 Refer to P 122 R11999 Caution YES NG Discharge pipe thermistor NO OK OK NG...

Page 102: ...or about 5 minutes without any other error Supposed Causes Compressor locked Compressor harness disconnected Troubleshooting Turn off the power Disconnect the harnesses U V and W R8399 Caution NO YES...

Page 103: ...er error 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 124 R11708 Caution YES YE...

Page 104: ...power switch before 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 p...

Page 105: ...itions A following condition continues over 1 10 minutes depending on the model after operating for 5 10 minutes depending on the model Cooling Dry room thermistor temp indoor heat exchanger temp 5 C...

Page 106: ...r 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 coi...

Page 107: ...s 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...

Page 108: ...frigerant shortage Four way valve Water mixed Stop valve OK OK OK NG NG Check No 06 Check the thermistors Check No 11 Check the refrigerant line Check No 04 Check the electronic expansion valve Replac...

Page 109: ...ceeds the limit Malfunction Decision Conditions The temperature sensed by the outdoor heat exchanger thermistor rises above C The error is cleared when the temperature drops below C Supposed Causes Th...

Page 110: ...outdoor unit PCB Replace the electronic expansion valve or the coil Replace the outdoor unit PCB Clean the outdoor heat exchanger Change the installation location or direction Check the installation...

Page 111: ...output converted 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...

Page 112: ...NO YES Connect it properly NO YES Replace the reactor NO YES Replace the compressor or the compressor relay harness Restart the operation again and if the error occurs again replace the outdoor unit P...

Page 113: ...g 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 35 class 5 minutes w...

Page 114: ...0 NO NO NO YES YES NO YES YES Check No 29 Check the short circuit of the diode bridge Check with the inverter checker Turn off the power Disconnect the harnesses U V and W Turn on the power Check the...

Page 115: ...rect the power supply Voltage as rated R11471 NO NO YES NO YES YES Check with the inverter checker Turn off the power Disconnect the harnesses U V and W Turn on the power Check the electrolytic capaci...

Page 116: ...nning 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 ru...

Page 117: ...ing frequency and CT detected input current Malfunction Decision Conditions The compressor running frequency is more than 55 Hz and the CT input current is below 0 5 A If the error repeats 4 times the...

Page 118: ...on the power again and restart operation Compressor running 320 50 VDC Any LED OFF Running current as shown at right with relay cable 1 or 2 Voltage within the allowable range Supply voltage 15 Replac...

Page 119: ...V 25 class 0 02 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...

Page 120: ...e following thermistors Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor Cooling Outdoor heat exchanger temperature Heating Indoor heat exchanger temperature...

Page 121: ...e compressor off the radiation fin temperature is above C The error is cleared when the radiation fin temperature drops below C To cool the electrical components the outdoor fan starts when the radiat...

Page 122: ...rn it on again Check the radiation fin temperature Check No 07 Check the installation condition Radiation fin dirty Above C Check No 09 Check the outdoor fan or related Error again or outdoor fan acti...

Page 123: ...pressor on is above C The error is cleared when the radiation fin temperature drops below C If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any...

Page 124: ...irty Check No 09 Check the outdoor unit 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...

Page 125: ...hile 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...

Page 126: ...ck No 07 Check the installation condition 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 aga...

Page 127: ...rature tends to rise Refrigerant shortage detection III Refrigerant shortage is detected by checking the difference between suction and discharge temperature Malfunction Decision Conditions Refrigeran...

Page 128: ...es Disconnection of the discharge pipe thermistor indoor or outdoor heat exchanger thermistor room or outdoor temperature thermistor Closed stop valve Refrigerant shortage refrigerant leakage Poor com...

Page 129: ...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 Al...

Page 130: ...oltage 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...

Page 131: ...before connecting or disconnecting connectors or parts may be damaged NO YES YES NO YES Precaution before turning on the power again NO Replace the fan motor or the outdoor unit PCB Check the supply...

Page 132: ...hen 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 Troublesh...

Page 133: ...wer off and on again and check to see if the EV generate latching sound 3 If the EV does not generate latching sound in the above step 2 disconnect the connector and check the continuity using a teste...

Page 134: ...e 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...

Page 135: ...temperature 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...

Page 136: ...e 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 dir...

Page 137: ...orm disturbance near the zero cross sections circled in Fig 2 5 1 9 Inverter Units Refrigerant System Check Check No 11 R7159 YES YES NO NO Outdoor fan system is functioning Check the outdoor fan syst...

Page 138: ...r from the outdoor unit PCB To disengage 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...

Page 139: ...n 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 R...

Page 140: ...e resistance between the pins of the DB1 as below If the resistance is or less than 1 k short circuit occurs on the main circuit 20 class 25 class terminal of the tester in case of digital terminal 2...

Page 141: ...178 2 9 Removal of Compressor 181 3 Outdoor Unit RXL20G2V1B9 183 3 1 Removal of Outer Panels Fan Motor 183 3 2 Removal of Electrical Box 192 3 3 Removal of Drain Pan Heater 195 3 4 Removal of PCB 197...

Page 142: ...SiENBE04 925_A Removal Procedure 127 5 6 Removal of Sound Blanket Thermistors 259 5 7 Removal of Four Way Valve 261 5 8 Removal of Electronic Expansion Valve 262 5 9 Removal of Compressor 263...

Page 143: ...pressed for 5 seconds the forced cooling operation is performed for about 15 minutes 2 Remove the air filter 1 Hold the both sides of the front panel and open the panel to the position where it stops...

Page 144: ...rifying filter is not marked for difference between the right and left sides 2 Remove the Titanium apatite photocatalytic air purifying filter ASSY by bending the air filter and unfastening the projec...

Page 145: ...r supplies before disassembling work Step Procedure Points 1 Hold the both sides of the front panel and open the panel over the position where it stops 2 Slide the left rotary shaft to the right and r...

Page 146: ...e front panel make sure that the shaft is fitted in the guide before closing the panel Caution on Mounting When mounting the front panel fit the right and left rotary shafts one by one into the groove...

Page 147: ...r 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...

Page 148: ...133 2 Remove the front grille 1 Remove the 2 screws one each at the right and left 2 The front grille has 3 hooks at the top 3 Unfasten the left hook 4 Unfasten the center hook Step Procedure Points...

Page 149: ...the right hook 6 Pull the upper part of the front grille out and lift the lower part up and then remove the front grille Caution on Mounting When mounting the front grille make sure that the 3 hooks a...

Page 150: ...o the upper side and the small horizontal blade to the lower side Do not put them in the wrong place 2 Unfasten the center shaft while bending the horizontal blade large slightly 3 Unfasten the left s...

Page 151: ...ing the horizontal blade small slightly 2 Unfasten the left shaft 3 Unfasten the key alignment shaft at the right side 3 Remove the fan guard 1 Unfasten the hooks at the lower part of the fan guard wi...

Page 152: ...ock rod 3 Unfasten the hooks at the upper 3 positions by pressing them with a flat screwdriver 4 Remove the vertical blade ASSY A vertical blade ASSY has 5 fins It is impossible to replace only one fi...

Page 153: ...ep Procedure Points 1 The figure shows the connections of wire harnesses Preparation Remove the front grille according to the Removal of Front Grille 2 Remove the screw of the wire fixture 3 Remove th...

Page 154: ...Release the harness for swing motors from the hook 7 Pull out the indoor heat exchanger thermistor Be careful not to lose the clip of the thermistor 8 Remove the screw and detach the earth wire Step P...

Page 155: ...at the upper far side by pressing it from above and pulling the electrical box toward yourself 11 Lift up the electrical box and pull it out There is a hook also at the lower part of the back When mo...

Page 156: ...ation 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...

Page 157: ...e the signal receiver unit 1 Unfasten the 3 hooks 2 Unfasten the hook on the opposite side and lift up the signal receiver unit 3 Remove the signal receiver unit Step Procedure Points R12277 Signal re...

Page 158: ...NT EYE sensor PCB 2 Disconnect the connector S26 from the INTELLIGENT EYE sensor PCB 5 Remove the signal receiver PCB 1 Unfasten the 3 hooks and remove the signal receiver PCB 2 Disconnect the connect...

Page 159: ...ure shows the connection of wire harness for the display PCB 2 Unfasten the 4 hooks and remove the display PCB 3 Disconnect the connector S49 from the display PCB 7 Remove the control PCB 1 Unfasten t...

Page 160: ...igures show the names of the PCB component parts S1 DC fan motor S21 HA connector S25 INTELLIGENT EYE sensor PCB S26 control PCB S32 indoor heat exchanger thermistor S41 swing motors S46 display PCB S...

Page 161: ...air may be sucked in to generate an over pressure in refrigeration cycle thus resulting in pipe rupture or accidental injury 3 Lift up the indoor unit slightly and pull out the drain hose The illustra...

Page 162: ...out the pipe 2 Widen the auxiliary pipe by about 10 20 degrees Caution When dismounting or mounting the indoor heat exchanger be sure to wear gloves or wrap it with cloth before proceeding You may be...

Page 163: ...nfastening the lower hooks lift up the indoor heat exchanger by its right side When mounting the indoor heat exchanger make sure that the hook right is fastened 6 Remove the indoor heat exchanger Step...

Page 164: ...before disassembling work Step Procedure Points 1 Remove the swing motor for vertical blade 1 Lift the indoor unit with a wooden base 2 Remove the screw behind the drain hose and disconnect the drain...

Page 165: ...crewdriver 5 Remove the swing motor unit 6 Detach the interlock shaft from the swing motor with a flat screw driver 7 Remove the vertical blade interlock with a flat screwdriver Step Procedure Points...

Page 166: ...BE04 925_A Indoor Unit Removal Procedure 151 8 Remove the 2 screws 9 Remove the swing motor for vertical blade 10 Disconnect the connector Connector green Step Procedure Points R10332 Screws R10333 R1...

Page 167: ...posite the horizontal blades do not move smoothly or the noise may be heard 1 Set the motor for the upper blade first connector white 2 Then set the motor for the lower blade connector red 3 Fix the b...

Page 168: ...least 10 min before disassembling work Step Procedure Points 1 Remove the right side panel Preparation Remove the indoor heat exchanger according to the Removal of Indoor Heat Exchanger 1 Remove the...

Page 169: ...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 rotor 1 Dislocate the fan rotor by sliding it to the right Step Procedure...

Page 170: ...th approx 5 mm left 2 Tighten the screw until it stops Then turn the screw in one scroll 3 Move the fan rotor and confirm the fan motor and the fan rotor are installed appropriately 4 Tighten the scre...

Page 171: ...r 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...

Page 172: ...ws 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 DAI...

Page 173: ...ove the screw and remove the drain pan heater cover 6 Remove the 7 screws of the front panel 7 Unfasten the hooks Pull and remove the front panel The front panel has 4 hooks Step Procedure Points R932...

Page 174: ...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...

Page 175: ...n 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...

Page 176: ...or Unit RXL20G2V1B Removal Procedure 161 8 Remove the screw and remove the fan motor fixing frame When reassembling fit the lower hooks into the bottom frame Step Procedure Points R9333 Fan motor fixi...

Page 177: ...edure 4 Remove the right side panel 1 Remove the 2 screws on the rear side 2 Release the outdoor temperature thermistor 3 Remove the 4 screws on the right side panel Step Procedure Points R12312 R1228...

Page 178: ...63 4 Remove the screw near the stop valves 5 Unfasten the hook on the rear side When reassembling make sure to fit the hook 6 Lift up the right side panel and remove it When reassembling make sure to...

Page 179: ...sassembling 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 Pane...

Page 180: ...etic 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...

Page 181: ...he connectors for the filter PCB HL3 HN3 8 Remove the wire harness for standby electricity saving 9 Cut the clamps at 2 locations 10 Disconnect the connectors for the drain pan heater with a flat scre...

Page 182: ...SiENBE04 925_A Outdoor Unit RXL20G2V1B Removal Procedure 167 11 Lift and remove the electrical box Step Procedure Points R9348 Electrical box...

Page 183: ...emove the drain pan heater 1 Cut the clamp 2 Remove the screw of the mounting clamp 3 Release the drain pan heater ASSY from the ditch between the bottom frame and the outdoor heat exchanger ASSY Remo...

Page 184: ...r Unit RXL20G2V1B Removal Procedure 169 4 Cut the clamp 5 Remove the 3 screws and remove the left side panel 6 The fuses are inside the drain pan heater Step Procedure Points R9352 R12307 Left side pa...

Page 185: ...ower 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 exc...

Page 186: ...SiENBE04 925_A Outdoor Unit RXL20G2V1B Removal Procedure 171 4 Feature of the thermistors Step Procedure Points R9356...

Page 187: ...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 electric...

Page 188: ...ENBE04 925_A Outdoor Unit RXL20G2V1B Removal Procedure 173 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 R936...

Page 189: ...main PCB Refer to page 12 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 ther...

Page 190: ...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 acc...

Page 191: ...NBE04 925_A 176 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 Procedu...

Page 192: ...d open the sound blanket outer 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 2 Lift and re...

Page 193: ...t 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 th...

Page 194: ...ation 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 fo...

Page 195: ...ting 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...

Page 196: ...nvironment 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...

Page 197: ...omes 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...

Page 198: ...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 s...

Page 199: ...ws 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 DAI...

Page 200: ...the screw and remove the drain pan heater cover 6 Remove the 7 screws of the front panel 7 Unfasten the hooks Pull and remove the front panel The front panel has 4 hooks Step Procedure Points R9329 D...

Page 201: ...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 temperatu...

Page 202: ...r Unit RXL20G2V1B9 Removal Procedure 187 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...

Page 203: ...B9 SiENBE04 925_A 188 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 R12309 Fan motor fixi...

Page 204: ...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...

Page 205: ...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...

Page 206: ...SiENBE04 925_A Outdoor Unit RXL20G2V1B9 Removal Procedure 191 5 Lift up the right side panel and remove it When reassembling make sure to fit the hook Step Procedure Points R12272 Hook...

Page 207: ...pplies 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...

Page 208: ...r 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 thermis...

Page 209: ...arge pipe thermistor Be careful not to lose the clip for the thermistor 9 Disconnect the connectors for the drain pan heater with a flat screwdriver 10 Lift and remove the electrical box Step Procedur...

Page 210: ...emove the drain pan heater 1 Cut the clamp 2 Remove the screw of the mounting clamp 3 Release the drain pan heater ASSY from the ditch between the bottom frame and the outdoor heat exchanger ASSY Remo...

Page 211: ...G2V1B9 SiENBE04 925_A 196 Removal Procedure 4 Cut the clamp 5 Remove the 3 screws and remove the left side panel 6 The fuses are inside the drain pan heater Step Procedure Points R9352 R12307 Left sid...

Page 212: ...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 electrica...

Page 213: ...ation 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 connecto...

Page 214: ...925_A Outdoor Unit RXL20G2V1B9 Removal Procedure 199 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 R1...

Page 215: ...r 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 outdo...

Page 216: ...ove the main PCB Refer to page 14 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...

Page 217: ...20G2V1B9 SiENBE04 925_A 202 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 PC...

Page 218: ...oor Unit RXL20G2V1B9 Removal Procedure 203 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 R1187...

Page 219: ...Outdoor Unit RXL20G2V1B9 SiENBE04 925_A 204 Removal Procedure 8 Feature of the filter PCB Refer to page 14 for detail Step Procedure Points R11878...

Page 220: ...ower 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 acco...

Page 221: ...iENBE04 925_A 206 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 Proce...

Page 222: ...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 t...

Page 223: ...or Unit RXL20G2V1B9 SiENBE04 925_A 208 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 R1...

Page 224: ...ait 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...

Page 225: ...dation 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 f...

Page 226: ...tting 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...

Page 227: ...ronment 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 re...

Page 228: ...s 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 t...

Page 229: ...er Panels Procedure Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Appearance features 2 Remove the panels 1 Remove t...

Page 230: ...emove the 4 screws and remove the discharge grille When reassembling make sure to fit the 4 hooks 4 Remove the screw and remove the stop valve cover The stop valve cover is united with the shield plat...

Page 231: ...n reassembling fasten the wires with screws on the terminal board 1 Remove the 3 screws to remove the wiring fixture Then remove the all screws to disconnect the power supply cables and the connecting...

Page 232: ...terminal board 4 Disconnect the connectors of the drain pan heater 5 Cut the clamp 6 Disconnect the connector for the fan motor S70 For removal procedure of the fan motor lead wire refer to Removal of...

Page 233: ...nector for the overload protector S40 8 Disconnect the connector for the electronic expansion valve coil S20 9 Disconnect the connector for the four way valve coil S80 10 Disconnect the connector for...

Page 234: ...ompressor 12 Disconnect the 2 connectors for the reactor 13 Release the discharge pipe thermistor Be careful not to lose the clip for the thermistor 14 Detach the clamp for the thermistors from the el...

Page 235: ...Outdoor Unit RXL25G2V1B SiENBE04 925_A 220 Removal Procedure 15 Remove the screw in front of the electrical box 16 Lift and remove the electrical box Step Procedure Points R0263 R0264...

Page 236: ...tep Procedure Points 1 Remove the screw and remove the electrical box cover Preparation Remove the panels according to the Removal of Outer Panels Remove the electrical box according to the Removal of...

Page 237: ...dure 4 Release the earth wire from the hook 5 Remove the 2 screws and detach the 1 clip to remove the radiation shield plate 6 Cut off the 5 clamps and disconnect the wire harnesses Step Procedure Poi...

Page 238: ...e the 8 screws in total to remove the PCB 8 Lift up the back side slightly and unfasten the hooks of the front When reassembling make sure that the hooks of the electrical box are placed on the PCB 9...

Page 239: ...10 Remove the PCB 11 Detach the terminals from the terminal board Refer to page 16 for detail S20 electronic expansion valve coil S40 overload protector S70 fan motor S80 four way valve coil S90 therm...

Page 240: ...SiENBE04 925_A Outdoor Unit RXL25G2V1B Removal Procedure 225 12 Remove the screw of the radiation fin Step Procedure Points R12214 Radiation fin R8171...

Page 241: ...emove the drain pan heater 1 Cut the clamp 2 Remove the screw of the mounting clamp 3 Release the drain pan heater ASSY from the ditch between the bottom frame and the outdoor heat exchanger ASSY Remo...

Page 242: ...r Unit RXL25G2V1B Removal Procedure 227 4 Cut the clamp 5 Remove the 3 screws and remove the left side panel 6 The fuses are inside the drain pan heater Step Procedure Points R9352 R12307 Left side pa...

Page 243: ...ing off all power supplies before disassembling work Step Procedure Points 1 Remove the partition plate When reassembling fit the lower hook into the bottom frame 1 Remove the 2 screws 2 The partition...

Page 244: ...anket carefully 1 Untie the string open the sound blanket outer and pull it out 2 Remove the sound blanket top upper 3 Remove the sound blanket top lower 4 Open the sound blanket inner and pull it out...

Page 245: ...ore disassembling work Step Procedure Points 1 Remove the outdoor fan The screw has reverse winding Nut size M6 1 Remove the washer fitted nut of the outdoor fan 2 Remove the outdoor fan When reassemb...

Page 246: ...emoval Procedure 231 2 The figure shows the arrangement of the fan motor lead wire 3 Remove the 1 screw of the fan motor fixing frame 4 Remove the fan motor fixing frame Step Procedure Points R8185 R1...

Page 247: ...an motor lead wire 6 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 7 Remove the 4 screw...

Page 248: ...e Points 1 Release the discharge pipe thermistor Be careful not to lose the clip for the thermistor 2 Cut the clamp and pull out the outdoor heat exchanger thermistor 3 The thermistors for outdoor tem...

Page 249: ...r supplies before disassembling work Step Procedure Points 1 Remove the peripheries Preparation Remove the sound blanket Detach the four way valve coil and the 2 clamps and then detach the wire harnes...

Page 250: ...erant 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...

Page 251: ...ting 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...

Page 252: ...tes 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 3 Unfasten the hooks with a f...

Page 253: ...happen that the refrigerant oil in the compressor catches fire prepare wet cloth so as to extinguish fire immediately Caution From the viewpoint of global environment protection do not discharge the r...

Page 254: ...y In case of difficulty with gas brazing 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 discon...

Page 255: ...10 minutes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the panels Take care not to cut your finger by the fins of the outdoor heat exchanger 1...

Page 256: ...the discharge grille upwards and remove it The discharge grille has 4 hooks 4 Remove the 6 screws of the front panel 5 Push the front panel and lift the shield plate to unfasten the hooks Step Procedu...

Page 257: ...left side hooks and then the right side hook Remove the front panel Lift the front panel while pushing the left side panel inwards Lift the front panel and unfasten the right side hook When reassembl...

Page 258: ...Procedure 243 2 Remove the stop valve cover 1 Remove the screw of the stop valve cover 2 Pull down the stop valve cover to unfasten the hooks and remove it The stop valve cover has 6 hooks Step Proce...

Page 259: ...Procedure Points 1 Remove the electrical box cover Preparation Remove the top panel and the front panel according to the Removal of Outer Panels This procedure is not necessary to remove the outdoor...

Page 260: ...2V1B Removal Procedure 245 2 Remove the fan motor 1 Detach the clamp and disconnect the connector for the fan motor S70 2 Release the fan motor lead wire from the 7 hooks Step Procedure Points R5258 R...

Page 261: ...fan with D cut section of the motor shaft 4 Remove the lower 2 screws from the fan motor first Be sure to remove the lower screws first If the upper screws are removed first the fan motor the center...

Page 262: ...Procedure 247 6 Release the fan motor lead wire from the 2 hooks and pull the fan motor out When reassembling put the fan motor lead wire through the back of the fan motor so as not to be entangled wi...

Page 263: ...s before disassembling work Step Procedure Points 1 Remove the 2 screws of the shield plate Preparation Remove the top panel and the front panel according to the Removal of Outer Panels 2 Slide the sh...

Page 264: ...nit RXL35G2V1B Removal Procedure 249 4 Disconnect the 2 earth wires 5 Remove the 3 screws of the right side panel 6 Remove the screw of the electrical box Step Procedure Points R9391 Earth wires R9392...

Page 265: ...connectors of the drain pan heater 8 Unfasten the hooks and remove the right side panel When reassembling insert the 2 hooks of the lower part and the 1 hook of the upper back 9 Remove the screws of...

Page 266: ...Detach the 2 wire clamps 12 Disconnect the connectors of the front side S20 electronic expansion valve coil S40 overload protector S80 four way valve coil S90 thermistors 13 Disconnect the relay conn...

Page 267: ...etach the clamp and release the thermistor lead wires from the hook 15 Remove the screw 16 Release the outdoor temperature thermistor 17 Release the harness of the outdoor temperature thermistor from...

Page 268: ...SiENBE04 925_A Outdoor Unit RXL35G2V1B Removal Procedure 253 18 Lift and remove the electrical box Step Procedure Points R9404 Electrical box...

Page 269: ...ork Step Procedure Points 1 Remove the cover of the electrical box Preparation Remove the electrical box according to the Removal of Electrical Box 2 Disconnect the connectors from the service monitor...

Page 270: ...5 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 8 Disconnect the 2 connectors for the reactor HR1 HR2 S...

Page 271: ...iENBE04 925_A 256 Removal Procedure 9 Remove the 3 screws of the main PCB 10 Unfasten the 4 hooks 11 Lift up and remove the main PCB Refer to page 18 for detail Step Procedure Points Main PCB R5287 R5...

Page 272: ...emove the drain pan heater 1 Cut the clamp 2 Remove the screw of the mounting clamp 3 Release the drain pan heater ASSY from the ditch between the bottom frame and the outdoor heat exchanger ASSY Remo...

Page 273: ...1B SiENBE04 925_A 258 Removal Procedure 4 Cut the clamp 5 Remove the 3 screws and remove the left side panel 6 The fuses are inside the drain pan heater Step Procedure Points R9352 R12307 Left side pa...

Page 274: ...tes or more after turning off all power supplies before disassembling work Step Procedure Points 1 Remove the sound blanket back 2 Remove the sound blanket outer Since the piping ports are torn easily...

Page 275: ...r 6 Release the discharge pipe thermistor Be careful not to lose the clip for the thermistor 7 Cut the clamp and pull out the outdoor heat exchanger thermistor Step Procedure Points Sound blanket top...

Page 276: ...oration 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 belo...

Page 277: ...the gas brazing machine Warning If the refrigerant gas leaks during work ventilate the room If the refrigerant gas is exposed to flames toxic gas may be generated Caution From the viewpoint of global...

Page 278: ...Compressor 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 le...

Page 279: ...exposed to flames toxic gas may be generated Warning Since it may happen that the refrigerant oil in the compressor catches fire prepare wet cloth so as to extinguish fire immediately Caution From the...

Page 280: ...ere 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 Do not use a metal saw for cutting pipes by all means because the sawd...

Page 281: ...l Operation and Field Settings 1 Trial Operation 267 2 Field Settings 268 2 1 When 2 Units are Installed in 1 Room 268 2 2 Standby Electricity Saving 269 2 3 Jumper and Switch Settings 270 3 Applicati...

Page 282: ...tem 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 tempe...

Page 283: ...or different address Both the indoor unit PCB and the infrared remote control need alteration Indoor Unit PCB 1 Remove the front grille 2 screws 2 Remove the electrical box 1 screw 3 Remove the shield...

Page 284: ...ocedure 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 connect...

Page 285: ...speed setting Remote control 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 f...

Page 286: ...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...

Page 287: ...SiENBE04 925_A 272 Appendix Part 9 Appendix 1 Piping Diagrams 273 1 1 Indoor Unit 273 1 2 Outdoor Unit 274 2 Wiring Diagrams 276 2 1 Indoor Unit 276 2 2 Outdoor Unit 276...

Page 288: ...EFRIGERANT FLOW FIELD PIPING 9 5CuT 6 4CuT FIELD PIPING M COOLING INDOOR UNIT FAN MOTOR HEAT EXCHANGER 6 4CuT HEATING THERMISTOR ON HEAT EXCH 4D058897C CROSS FLOW FAN COOLING 9 5CuT 6 4CuT M INDOOR UN...

Page 289: ...FLOW 7 0CuT COOLING 4 0 ID 2 0CuT 4 8CuT PROPELLER FAN COMPRESSOR OUTDOOR UNIT 9 5CuT 6 4CuT 4 8CuT 9 5CuT MUFFLER ACCUMULATOR 9 5CuT 3D059586E 3D059590A OUTDOOR UNIT HEAT EXCHANGER 7 9CuT 7 9CuT 12...

Page 290: ...7CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT 7 9CuT PROPELLER FAN MUFFLER HEAT EXCHANGER 7 9CuT 7 9CuT M COMPRESSOR 12 7CuT 12 7CuT 7 9CuT 7 9CuT 4 0CuT 4 0CuT CAPILLARY TUBE 4 CAPILLARY TUBE...

Page 291: ...2 V3 SA1 YLW GRN E1 E2 Z2C N 2 outdoor FU4 1A FU5 1A E1H t S1T DRAIN PAN HEATER L1 PCB1 MR30 MR30_A MR30_B MRM20 MRM10 HR1 HN2 HL2 1 S11 9 BLK BLK BRN BRN 4 1 BLK BLK ORG BLU GRY WHT BLK BLK BLK BLK B...

Page 292: ...GE HEATER FUSE INTELLIGENT POWER MODULE LIVE COIL REACTOR COMPRESSOR MOTOR FAN MOTOR MAGNETIC RELAY NEUTRAL PROTECTIVE EARTH SA1 OVERLOAD PROTECTOR PRINTED CIRCUIT BOARD CONNECTOR THERMISTOR THERMO ST...

Page 293: ...1 1 5 S102 1 5 PCB2 S2 LED A SW1 SW4 Y1R S80 3 1 BLU BLU INCASEOF HEAT PUMP TYPE S20 1 6 WHT YLW ORG BLU BRN RED M Y1E outdoor 1 S90 6 BLK BLK BLK t t t OUTDOOR DISCHARGE CONDENSER R3T R2T R1T Z1C Z5C...

Page 294: ...ication to the best of its knowledge No express or implied warranty is given for the completeness accuracy reliability or fitness for particular purpose of its content and the products and services pr...

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Daikin Inverter FTXL20G2V1B, Service Manual

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