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1. Piping fixture R15105 157 Removal Procedure Indoor Unit SiBE061121 Procedure 4 Remove the screw of Earth wire the earth wire EEEN wma ei d Kr II GL ANNEN l etoen o wd MaN d IW eh eege S 2 ILTZ R15136 5 Cut the clamp R15108 the clip m Take care not to lose he radiant 6 Pull outt m J of thermistor __J panel thermistor 0 6 A ee Et wo Ch EE EE El Cl Kb Ch
2. R15147 Indoor Unit 164 Indoor Unit SiBE061121 ES Procedure Pens o 10 Remove the motor OE SEN TL o ir 2 ek Motor cover 11 Release the harnesses for the fan motor from the hook R15149 12 Release the harnesses for the fan motor from the hooks R15144 165 Removal Procedure SiBE061121 Indoor Unit Step procedure Ponts 13 Loosen the lock screw 14 Remove the fan rotor and the fan motor 15 Remove the fan motor Removal Procedure m You can remove the fan motor by loosening the screw You do not need to remove the screw Ln L H LN S TO LI TELT wm SE SEN OTE 3 Fan motor EN 4 n ff rf nn fn SE SSESEEEEZ m S23 55S
3. Oo Le U Ni Tr emn RH mi watt ul Iddi GE KNN WAA EE de E S NAN EE 4 AAA B SEN f UT DAE ee ES d UN je 0 OC DO de T Am LC 10 Remove the 2 screws R15141 Removal Procedure 159 SiBE061121 Indoor Unit Step Procedure Points m Be careful not to wet the floor with drain 11 Disconnect the drain hose 12 Remove the drain pan 2 Remove the indoor heat exchanger ASSY 1 Remove the indoor electronic expansion valve coil 2 Unfasten the hook and disconnect the relay connector for the indoor heat exchanger thermistor Removal Procedure Drain hose R15315 III MM l EEN Mi KEN tum mu EE There is a hook inside the indoor electronic expansion valve coil Do not deform the hook OH a TEL R15113 NY
4. 3 Remove the 6 screws of the front panel Front panel 4 Push the front panel and lift the shield plate to unfasten the hooks 1 Push the front panel 2 Lift the shield plate upward 7 197 Removal Procedure SiBE061121 Outdoor Unit RXG50K2V1B Procedure Unfasten the left side m Lift the front panel while hooks and then the pushing the left side panel right side hook Zz inward Remove the front panel ODE AIL Anno AAA A R5249 m Lift the front panel and unfasten the right side hook m When reassembling fit the right side of the front panel first AW Removal Procedure 198 Outdoor Unit RXG50K2V1B SiBE061121 step Procedure Points 2 Remove the stop valve cover 1 Remove the screw of the stop valve cover Stop valve cover 2 Pull down the stop valve cover to unfasten the hooks and remove it m The stop valve cover has 6 hooks 199 Removal Procedure SiBE061121 3 2 Removal of Outdoor Fan Fan Motor Procedure 1 Remove the electrical box cover 1 Remove the screw of the shield plate K N a 2 Unfasten the 2 hooks and remove the shield plate 3 Unfasten the 4 hooks of the electrical box cover
5. S57 PCB2 a BLK BLK ia SIGNAL RECEIVER Q Gi Hp H2P Y1E i 27 26 PCB1 PCB3 WHT CC o SZW SHH RECTIFIER TRANSMISSION outdoor Se 8 CIRCUIT ae FIELD WIRING CAUTION NOTE THAT OPERATION WILL RESTART AUTOMATICALLY IF THE MAIN POWER SUPPLY IS TURNED OFF AND THEN BACK ON AGAIN S21 HA indoor PROTECTIVE EARTH 1 S57 CONNECTOR D F1U FUSE S1W OPERATION SWITCH WIRELESS H1iP H3P PILOT LAMP S2W 4 UPWARD AIR FLOW LIMIT SWITCH REMOTE M1F FAN MOTOR X1M TERMINAL STRIP CONTROLLER MIS SWING MOTOR E3 EARTH TERMINAL HEAT EX PCB1 PCB3 PRINTED CIRCUIT BOARD Y1E ELECTRONIC EXPANSION VALVE COIL R1T R4T THERMISTOR Z1C FERRITE CORE 3D069838A Appendix 230 Wiring Diagrams SiBE061121 2 2 Outdoor Unit RXG25 35K2V1B WWW FIELD WIRING indoor X1M 1 ey 1 BLK
6. R15316 160 Indoor Unit SiBE061121 Step Procedure Points 3 Remove the 2 screws on the left side 4 Unfasten the 2 hooks on the right and remove the indoor heat exchanger ASSY i NW AMI LLL l AN a NNW INI IN Been i MYA d Seen N EEE Indoor heat exchanger ASSY 5 Pull out the indoor heat exchanger thermistor 161 R15117 Ste ya NI AA dst SN AS seg Se A 4 d d an di UT Hit Wl Is SEEN dt G EEEH Od oto A gt a G i LET LLDT Ber De V H Tgi Y CHI nai EXS R15118 Indoor heat exchanger thermistor R15111 AP Caution When removing or reassembling the indoor heat exchanger be sure to wear gloves or wrap it with cloth before proceeding to the work You may be injured by the fins The indoor heat exchanger ASSY has 2 hooks on the R15324 Removal Procedure SiBE061121 Indoor Unit 1 10 Removal of Fan Rotor Fan Motor Procedure AP Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work St
7. mr Display To stop operation Press again e KJI disappears from the LCD e The OPERATION lamp goes off Notes on each operation mode e Since this air conditioner heats the room by taking heat from outdoor air to indoors the heating capacity becomes smaller in lower outdoor temperatures If the heating effect is insufficient it is recommended to use another heating appliance in combination with the air conditioner e The heat pump system heats the room by circulating hot air around all parts of the room After the start of HEAT operation it takes some time before the room gets warmer e In HEAT operation frost may occur on the outdoor unit and lower the heating capacity In that case the system switches into defrosting operation to take away the frost e During defrosting operation hot air does not flow out of indoor unit e This air conditioner cools the room by releasing the heat in the room outside Therefore the cooling performance of the air conditioner may be degraded if the outdoor temperature is high e When the outdoor temperature is lower than 10 C do not use COOL operation If the operation is used when the outdoor temperature is lower than 10 C the protective function of the main unit works and this disables the operation e The computer chip works to rid the room of humidity while maintaining the temperature as much as possible It automatically controls temperature and airflow rate so manua
8. Is the stop valve open Open the stop valve Is the connection pipe deformed Replace the pipe installed at the site Is the air filter or indoor outdoor heat exchanger dirty Not dirty Clean the dirty one Replace the compressor R11718 128 Check SiBE061121 5 11 Outdoor Fan System Check Check No 19 DC motor Check the outdoor fan system Outdoor fan running Fan motor lead wire connector disconnected YES Reconnect the connector YES Outdoor fan system is functioning Go to Check No 16 R15001 5 12 Main Circuit Short Check Check No 20 D Note Check to make sure that the voltage between and of the diode bridge DB1 is approx O V before checking m Measure the resistance between the pins of the DB1 as below m lf the resistance is o or less than 1 KQ short circuit occurs on the main circuit terminal of the tester in case of digital terminal i terminal of the tester a 2 3 in case of digital terminal several kQ several MQ R44 RAS RAE R41 pap DU DD FEEN PISTE R12035 129 Service Diagnosis SiBE061121 Check 5 13 Capacitor Voltage Check Check No 21 Before this check be sure to check the main circuit for short circuit With the circuit breaker still on measure the voltage as the illustration below Be careful never to touch any live parts Multimeter DC voltage ra
9. md ka DC voltage or DC current sensor abnormality is identified based on the compressor running frequency and the input current The compressor running frequency is above 52 Hz lf the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Defective outdoor unit PCB Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged AN Caution Replace the outdoor unit PCB 104 Troubleshooting SiBE061121 4 20 CT or Related Abnormality 50 Class Remote Controller Display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes 105 A CT or related error is detected by checking the compressor running frequency and CT detected input current B The compressor running frequency is more than 55 Hz and the CT input current is below 0 5 A If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Defective power module Breakage of wiring or disconnection Defective reactor Defective outdoor unit PCB Service Diagnosis SiBE061121 Troubleshooting Troubleshooting AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Check No 15 Refer to P 125 Turn off the power and turn it on again Refer to P 130 Running cur
10. 3 MAOO ON UE 132 dek R movalof Front EE Eege 132 12 Removal Ol Alr D annette e setes 133 1 3 Removal of Front Grille Ay 134 1 4 Removal of Electrical Box PCBS ane enen een eeneeneneeneenernn 135 1 5 Removal of Horizontal Blade naaar eenen erneer nennen eenen enn 148 1 6 Removal SWING ere EE 149 1 7 Removal of Radiant Pane be gegen RN EE geesde 150 1 8 Removal of Air Outlet Ay 155 1 9 Removal of Drain Pan Indoor Heat Exchanger ASSY 157 1 10 Removal of Fan Rotor Fan Motor 162 Outdoor Unit RXG25 35K2V1B nnee een eener een eeneenenn 167 2 1 Removal of Outer Panels Fan Motor 167 2 2 Removal of Electrical BOX arovereseevereenen sere ENNEN ENNEN e 176 2 0 Removal Ol PCBS EE 179 2 4 Removal of Reactor Partition Plate 187 2 5 Removal of Sound Bl nketS ertnenserteeeteineeratanseieertraidereiebeed 189 2 6 Removal of Four Way Vahye uunnsuansnnnnrenvenenennser venen vens 191 27 Removal EES 194 Outdoor Unit RXGSOK2V EE 196 3 1 Removal of Outer Panels nennen eenen nenenneeneneeneenvenen ennn 196 3 2 Removal of Outdoor Fan Fan Motor 200 3 3 Removal of Electrical BOX ereket aD NEA 204 34 Remova O PCBS unu ed eet nee 209 3 5 Removal of Sound Blankets Thermistors annen 212 3 6 Removal of Four Way Vahye un snann eneen enn eeneneenenn ennen 214 3 7 Removal of Outdoor Electronic Expansion Valve 215 3 8 Remov
11. Strings CAUTION e The surface of the radiant panel becomes very hot during RADIANT operation Do not touch the panel of the main unit directly After the operation is complete do not remove or care and clean the panel until the surface temperature of the panel decreases Air filter lower Titanium apatite photocatalytic air purifying filter e It is inside of air filter lower e Appearance of the outdoor unit may differ from some models Air inlet Outdoor temperature back and side sensor back VEH Drain hose Bi Stret Earth terminal e t is inside of this cover PS A HH Model name plate Air outlet NA dre Refrigerant piping and inter unit wiring 47 Operation Manual SiBE061121 Operation Manual Name of Parts Remote Controller Signal transmitter Receiver Display LCD e t displays the current settings In this illustration each section is shown with its displays on for the purpose of explanation e To use the remote controller aim the transmitter at the indoor unit If there is anything to block signals between the unit and the remote controller such as a curtain the unit will not TEMPERATURE operate i e Do not drop the remote controller Do adjustment buttons not get it wet e It changes the temperature setting e The maximum distance for Ze communication is approximately 7m ON OFF button FAN setting button e
12. Troubleshooting 4 11 Compressor Lock Remote Controller Display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Troubleshooting Check No 15 Refer to P 125 Service Diagnosis gt ep ar gt ep mee A compressor lock is detected by checking the compressor running condition through the position detection circuit lt 25 35 class gt m Operation stops due to overcurrent m If the error repeats the system is shut down m Reset condition Continuous run for about 11 minutes without any other error lt 50 class gt m A compressor lock is detected by the current waveform generated when applying high frequency voltage to the motor If the error repeats the system is shut down Reset condition Continuous run for about 5 minutes without any other error Compressor locked Compressor harness disconnected AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Precaution before turning on the power again Make sure the power has been off for at least 30 seconds Turn off the power Disconnect the harnesses U V and W Check No 15 Check with the inverter checker Inverter checker Part No 1225477 Correct the power supply or replace the outdoor unit PCB YES Turn off the power and reconnect the harnesses Turn on the power again and restart the system Emergency stop wit
13. 121 5 2 Fan Motor Connector Check 122 5 3 Power Supply Waveforms Check 122 5 4 Electronic Expansion Valve Coil Check 123 5 5 Four Way Valve Performance Check 124 5 6 Inverter Unit Refrigerant System Check 124 5 7 Inverter Checker Check 125 5 8 Rotation Pulse Check on the Outdoor Unit PCB 127 5 9 Installation Condition Check 128 5 10 Discharge Pressure En e 128 Service Diagnosis SiBE061121 Service Diagnosis 5 11 Outdoor Fan System Check 129 kA a KE uer U Snot Ee EE 129 5 13 Capacitor Voltage Check 130 5 14 Power Module Check 130 70 Troubleshooting with LED SiBE061121 1 Troubleshooting with LED 1 1 Indoor Unit Operation Lamp The operation lamp blinks when any of the following errors is detected 1 When a protection 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 the diagnostic procedure described in the following pages Operation lamp green R14646 Service Monitor The indoor unit has one green LED LED A on the main PCB When the microcomputer works in order the LED A blinks 1 2 Outdoor Unit The outdoor unit has one green LED LED A on the PCB When the microcomputer works in order the LED A blinks 71 Service Diagnosis SiBE061121 Problem Symptoms and Measures 2 Problem
14. 1225477 YES Correct the power supply or replace the outdoor unit PCB Turn off the power and reconnect the harnesses Turn on the power again and start operation Check No 18 Check the discharge pressure R14440 Service Diagnosis 94 Troubleshooting SiBE061121 4 14 Four Way Valve Abnormality Remote Controller Display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes 95 Z gt RI The room temperature thermistor the indoor heat exchanger thermistor the outdoor temperature thermistor and the outdoor heat exchanger thermistor are checked if they function within their normal ranges in each operation mode A following condition continues over 1 10 minutes depending on the model after operating for 5 10 minutes depending on the model m Cooling Dry room thermistor temp indoor heat exchanger temp lt 5 C m Heating indoor heat exchanger temp room thermistor temp lt 5 C m If the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error Disconnection of four way valve coil Defective four way valve coil or harness Defective outdoor unit PCB Defective thermistor Refrigerant shortage Water mixed in refrigerant Defective stop valve Service Diagnosis SiBE061121 Troubleshooting Check No 01 Refer to P 121 Check No 13 Refer to P 1
15. 3 3 Controls at Mode Changing Start up 3 3 1 Preheating Operation Outline Detail 33 The inverter operation in open phase starts with the conditions of the preheating command from the indoor unit the outdoor temperature and the discharge pipe temperature m 25 35 Class Outdoor temperature gt 7 C Control A Outdoor temperature lt 7 C Control B Control A e ON condition Discharge pipe temperature lt 10 C OFF condition Discharge pipe temperature gt 12 C Radiation fin temperature gt 90 C Control B e ON condition Discharge pipe temperature lt 20 C OFF condition Discharge pipe temperature gt 22 C Radiation fin temperature gt 90 C m 50 Class Outdoor temperature gt 10 C Control A Outdoor temperature lt 10 C Control B Control A e ON condition Discharge pipe temperature lt 6 C OFF condition Discharge pipe temperature gt 8 C Radiation fin temperature gt 90 C Control B e ON condition Discharge pipe temperature lt 10 5 C OFF condition Discharge pipe temperature gt 12 C Radiation fin temperature gt 90 C Function and Control SiBE061121 Control Specification 3 3 2 Four Way Valve Switching Outline In heating operation current is conducted and in cooling and defrosting current is not conducted In order to eliminate the switching sound as the four way valve coil switches from ON to OFF when the heating is stopped the OFF delay switch of the
16. N H r 229 CA A7 g R11835 Lead wire Outdoor fan R3249 Remove the 4 screws and remove the fan Bh NW motor af X LCE R12311 4 Remove the right side panel _ Fe Remove the 2 screws Set IC A Sal il Ai G f Wen lu De d A o on the rear side R12162 173 Removal Procedure SiBE061121 Outdoor Unit RXG25 35K2V1B Step Procedure 2 Remove the 4 screws on the right side panel 3 Remove the screw near the stop valves 2 SS ne 4 Unfasten the hook on m When reassembling make erii oY sure to fit the hook MANS Wu AE mm yy Th Removal Procedure 174 Outdoor Unit RXG25 35K2V1B SiBE061121 Procedure Lift up the right side m When reassembling make panel and remove it Mn a sure to fit the hook R12272 Lift up the guard net and remove it ET SOA V l NN E K R11841 Removal Procedure SiBE061121 Outdoor Unit RXG25 35K2V1B 2 2 Removal of Electrical Box Procedure AN Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure 1 Disconnect the Preparation connector for the en ne m Remove the panels and overload p
17. NO YES LO Outdoor temperature thermistor Discharge pipe thermistor Outdoor heat exchanger thermistor es gt on Reconnect the connectors or thermistors Replace the defective one s of the following thermistors Outdoor temperature thermistor x Discharge pipe thermistor Outdoor heat exchanger thermistor Replace the indoor heat exchanger thermistor Replace the outdoor unit PCB R14443 108 Troubleshooting SiBE061121 4 22 Electrical Box Temperature Rise Remote Controller Display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes 109 KS An electrical box temperature rise is detected by checking the radiation fin thermistor with the compressor off m With the compressor off the radiation fin temperature is above A C m The error is cleared when the radiation fin temperature drops below B C Bm 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 assess ov 75 IS Szeen Defective outdoor fan motor Short circuit Defective radiation fin thermistor Disconnection of connector Defective outdoor unit PCB Service Diagnosis SiBE061121 Troubleshooting Troubleshooting AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Check No 17 Turn off th
18. Pull and remove the front panel SiBE061121 R11825 m The front panel has 4 hooks R13505 Removal Procedure Outdoor Unit RXG25 35K2V1B SiBE061121 Procedure m Nut size M6 3 Remove the fan motor Outdoor fan Remove the nut of the outdoor fan m When reassembling align w mark of the outdoor fan with D cut section of the I Remove the outdoor motor shaft WWM HMI EEE Outdoor temperature thermistor Release the outdoor temperature thermistor 170 Removal Procedure Outdoor Unit RXG25 35K2V1B SiBE061121 step Procedure Points o MY mm 5 Disconnect the connector for the fan motor S70 6 Release the fan motor lead wire from the hook G DEE Ee R11832 171 Removal Procedure Outdoor Unit RXG25 35K2V1B SiBE061121 Procedure ab C ES Un S Ka U GA CO Bn en ab a Remove the screw and remove the fan motor fixing frame lower hooks into the bottom 172 Removal Procedure Outdoor Unit RXG25 35K2V1B SiBE061121 Procedure Open the hooks and m When reassembling put the release the fan motor fan motor lead wire through lead wire _ the back of the fan motor so NE as not to be entangled with NE the outdoor fan
19. 27 T 470aF 28V 3 Tt mr Saa emeng ZC ee 0 0 HR1 IS 2teF 400 HE a CJ we J a RAZ E KE a a y wb of a rors H a 1 W I WW UT arne D el H Las H 1 he F 1 IG oe to CH 5 oct D R 8 az rt hy 18 PMI co Es RI D EN S RET i f H IE 00332033 D ze erry EE ET J H DCi 2v 5 S 3 BUGIS eck p hmm SONB IA TE oz es Ictt IR 1B SS me D HM e D EAA AC Tee AE BA Ni ay D i a4 ah h i penn 203 DH i t HEI HEEL Leert 6 S 1 ee 7 7ASTV S4UBCV 23 yen gpLus Ge Fre MN cei eg S80 S90 S20 S40S70 S51 FU3 2P282217 1 PCB 2 Service Monitor PCB Kammen SERVICE MONITOR s52 g S102 3P169059 1 Printed Circuit Board Connector Wiring Diagram SiBE061121 Function and Control Part 4 Function and Control ke MAME UNCUONS nnee een Belete ebde 15 Jet Temperature COMTOI rset etende 15 12 Freguency Principle ee ee ee 15 1 3 Airflow Direction Control 17 1 4 Fan Speed Control for Indoor Unit annen eneen 18 ES RADIANT OPE aOR terne eeens derne senda eege 19 t6 Program Diy OPSANON EE 21 Ie Automatic Operat Oss crisser eaa 22 18 Thermosta Een e EE 23 EC NIGHE SET MOUS omne nnee 24 loft See leg Oe ee WEE 25 1 11 Inverter POWERFUL Operation aanne neen n 26 LIZ Ohe FUNCTIONS ennaa wed bea 27 2 FUNCION OI hn Le un E e EE 29 3 Gontrol SPECICATION ME 30 sl leede eneen ne ane ed ees d 30 Siz Eeer ee 31 3 3 Controls at Mode Chang
20. ET Ki CG x i R15137 Radiant panel thermistor 0 6 158 Removal Procedure SiBE061121 Indoor Unit Procedure the clip m Take care not to lose e of thermistor Sr out the radian Seng thermistor 0 4 ne weillt it lt Rn LI MME MN AAA Radiant panel thermistor 4 R15138 8 Cut the clamp ileum OUDE LE lt gt LE Y ail E rom Ld i NANA EM IW EEN IW w llt LL Gel SET u S GE ch Ct KAA KAA Wii ng HEN EE UR Le Make AS In Zi An UD A0 2 A Ai ioings are m When the ae es disconnected hs entering the 7 both openings i t o isture 9 Disconnec l f a d MOIS tons O z connecting sec 3 iquid pipina and the the liquid piping
21. R11669 is displayed on the LCD R11821 2 Select GC service check with the Temp A or W button 3 Press the Mode button to enter the service check mode R11672 The left side number blinks R11670 4 Press the Temp A or VW button and change the number until you hear the two consecutive beeps or the long beep R11671 Service Diagnosis 74 Service Check Function 15 SiBE061121 Diagnose by the sound beep The left side number does not correspond with the error code two consecutive beeps The left side number corresponds with the error code but the right side number does not long beep Both the left side and right side numbers correspond with the error code The numbers indicated when you hear the long beep are the error code Error codes and description Refer to page 76 Press the Mode button R11672 R11673 Press the Temp A or W button and change the number until you hear the long beep R11671 Diagnose by the sound beep The left side number does not correspond with the error code two consecutive beeps The left side number corresponds with the error code but the right side number does not long beep Both the left side and right side numbers correspond with the error code Determine the error code The numbers indicated when you hear the long beep are the error code Error codes and description Refer to page 76 10 Press the
22. and remove it AA N NY Sy Procedure ANN SOY yas ND W 7 4 Shield plate Electrical box cover Removal Procedure R12029 AE HTI HHHH 8 Outdoor Unit RXG50K2V1B AN Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Preparation m Remove the top panel and the front panel according to the Removal of Outer Panels This procedure is not necessary to remove the outdoor fan only 200 Outdoor Unit RXG50K2V1B SiBE061121 nn A oo Oo i k NE Release the fan motor lead wire from the 7 hooks QE S y 5 aS Mi O Ek Ser y lt a N n ZN ag i a Fan motor i lead wire Procedure Removal Procedure SiBE061121 Procedure Remove the nut of the outdoor fan i TT Toy a Kij j Outdoor Unit RXG50K2V1B m Nut size M6 O 10 mm ctl a EN En UA m When reassembling align y mark of the outdoor fan Remove the lower 2 screws from the fan with D cut section of the motor shaft m Be sure to remove the lower screws first If the upper motor first Then remove the 2 upper screws tre Mu hati Removal Proc
23. cfm 48 9 1 726 43 1 1 521 Propeller 73 735x825x300 797 x 960x 390 48 53 Sound Pressure H SL dB A 48 44 48 45 Level Sound Power ar def Ip Drawing No 3D071594 Note m The data are based on the conditions shown in the table below Piping Length Conversion Formulae kcal h kW x 860 Btu h kW x 3412 cfm m3 min x 35 3 Indoor 27 CDB 19 CWB Indoor 20 CDB Em Outdoor 35 CDB 24 CWB Outdoor 7 CDB 6 CWB 5 Specifications SiBE061121 Part 3 Printed Circuit Board Connector Wiring Diagram Te INNO Oe AAM netten neen enten ni neee 7 2e Outdoor RL EE 10 Za UR CA AEP A EE 10 22 RAAGSOKOVIB tenere nrden he ee 12 Printed Circuit Board Connector Wiring Diagram 6 Indoor Unit 1 Indoor Unit Connectors and PCB 1 Main PCB Other Parts 1 S1 S2 S6 4 S21 S26 S30 14 F1U 15 LED A SiBE061121 Connector for fan motor Connector for terminal board Connector for swing motor Connector for centralized control HA Connector for service PCB Connector for indoor electronic expansion valve coil motor operated valve coil Connector for indoor heat exchanger thermistor Connector for room temperature thermistor Connector for radiant panel thermistors Connector for display PCB Connector for earth Varistor Fan speed setting when compressor stops for thermostat OFF Power failure recovery function x Refer to page 225 for detail Fuse 3 15A 250V LE
24. deleted Weekly 2 Hold 5 for 5 seconds e The reservation of the selected day of the week will be deleted All reservations Weekl Hold for 5 seconds while normal display e Be sure to direct the remote controller toward the indoor unit and check for a receiving tone e This operation is not effective while WEEKLY TIMER is being set e All reservations will be deleted Operation Manual SiBE061121 Operation Manual 2 13 Quick Reference Quick Reference 3P276869 1 Operation Manual 68 SiBE061121 69 Part 6 Service Diagnosis Ts PFOUDIESNOOUNG WIN LED E 71 o We ele ie e En EE 71 TZ OND 0 ole GA sini Ae see ten enti ute ta lend ns ela ated ete nsne teeta guiecentitontwaias 71 2 Problem Symptoms and Measures nn0annannnnnonnnnennnnennnnnnnnnnnennnnnnnne 72 3 SENICE Cheek FUNCOM armere neden 73 e ER te Ee En eru O sisian a aE entend lansentaesannendendd 76 4 1 Error Codes and Description aaneen enenen eenen veneneenerenenennnn 76 4 2 Indoor Unit PCB Abnormality aaneen ennen eneen ens ennen ennen 77 4 3 Freeze up Protection Control or Heating Peak cut Control 79 4 4 Fan Motor DC Motor or Related Abnormality 81 4 5 Radiant Panel Temperature Rise Indoor Electronic Expansion Valve Motor Operated Valve Abnormality Freeze u
25. of the suction side and disconnect Lift the compressor up and remove it SiBE061121 Note m Do not use a metal 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 Be careful so as not to burn the compressor terminals the name plate the heat exchanger fins Removal Procedure Outdoor Unit RXG50K2V1B SiBE061121 RXG5OK2V1B Removal of Outer Panels 3 Outdoor Uni 3 1 Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work AN Warning Procedure Procedure Remove the panels Cc en S Remove the 4 screws and lift the top panel i H He MIDI doud VM OEL IA HIE MTN SS EEE HOH E m Take care not to cut your finger by the fins of the outdoor heat exchanger m Slide the discharge grille upward and remove it EHH SENE ji e i AULA HS HE AI rth TE A f wd TTTS TT OM III EDU OI Ce A b D Remove the 4 screws and remove the discharge grille Discharge grille 196 Removal Procedure Outdoor Unit RXG50K2V1B SiBE061121 Step Procedure m The discharge grille has 4 hooks
26. pa De 2 WT tO L p N z 5 x Q i lal I e L 0 O O z MR30_A MR30_B S o gt 23 aE m gt a de e ionis Ille Dy yt outdoor 1 a 2 NOTE m D S r 1 REFER TO THE NAMEPLATE FOR THE POWER REQUIREMENTS 4 En Es C5 C6 C119 CAPACITOR VK Dee mg Py it DB1 DB2 DB3 DIODE BRIDGE X12A it H Zic p FU1 FU2 FU3 FUSE x x INCASE OF RIT R2TR3T QIL N 3 Su IPM1 IPM2 INTELLIGENT POWER MODULE a am VIE Ke ONLY OUTDOOR DISCHARGE vg Q L LIVE ed CONDENSER ae Li COIL PCB1 PCB2 PCB3 PRINTED CIRCUIT BOARD SWI FORCED OPERATION SWITCH L1R REACTOR ae kon ca ee V1 V2 V3 VARISTOR M1C COMPRESSOR MOTOR i i X1M TERMINAL STRIP l S70 S80 S90 S100 S110 M1F FAN MOTOR a a ne VIE ELECTRONIC EXPANSION VALVE COIL MRCW MR30 MRM10 MRM20 MAGNETIC RELAY Fees E DEE EE N NEUTRAL RIT R2T RST THERMISTOR Z1C Z2C Z3C FERRITE CORE LUO EE E E E ENE EE ee E J LiR GRN 9 T E Z1C annis HRID iHR2 FUS e Leet SCH A RED POWER SUPPLY Sack E1 BIE2 MRM20 315A lo EU 10 DU Ls Z2C 30A V2 MAMIO BEES S N 5 BRN tet T A t T SS Tu ORG ef oj WHT di Ai Ei WHT BLU TO INDOOR UNIT X11 M1C ZAC RED a RED U 2 RED oul um V M 3 BLU gt BLU a V3 am men QiL pe xx O PCB1 MRC W 9 sao abt V5 1 4 Le bed e 15515 181015 3 880 4 1 S20 6 1 S90 e indoor 5 OO e oi ooool EE WWW IT iH Z gt D gt HI 1 x D FIELD WIRING Dana EDS 5 o o fel oc al
27. trouble easily and securely Connect this checker as a quasi compressor instead of compressor and check the output of inverter m Operation Method Step 1 Be sure to turn the power off Step 2 Install the inverter checker instead of a compressor Note Make sure the charged voltage of the built in smoothing electrolytic capacitor drops to 10 VDC or below before carrying out the service work l 2 Connect the terminals to the 1 Remove the terminals from terminale ofthe invertor the compressor checker Inverter checker Be careful not to let the terminals U V W touch each other Otherwise high voltage is applied R15350 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 result in incorrect detection Step 3 Activate power transistor test operation from the outdoor unit 1 Press the forced cooling operation ON OFF button for 5 seconds Refer to page 221 for the position Power transistor test operation starts 125 Service Diagnosis SiBE061121 Service Diagnosis Check m Diagnose method Diagnose according to 6 LEDs lighting status 1 When all the LEDs are lit uniformly the compressor is defective Replace the compressor 2 When the LEDs are not
28. 4 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 e When the pressure difference is low the rotation speed of the outdoor fan is reduced e When the pressure difference is high the rotation speed of the outdoor fan is controlled as well as normal operation 5 Fan control while forced cooling operation The outdoor fan is controlled as well as normal operation while the forced cooling operation 6 Fan speed control for POWERFUL operation The rotation speed of the outdoor fan is increased while the POWERFUL operation 7 Fan speed control while indoor outdoor unit quiet operation The rotation speed of the outdoor fan is reduced by the command of the indoor outdoor unit quiet operation 8 Fan ON OFF control when operation starts stops The outdoor fan is turned ON when the operation starts The outdoor fan is turned OFF when the operation stops 3 9 Liquid Compression Protection Function Outline Detail Function and Control In order to obtain the dependability of the compressor the compressor is stopped according to the outdoor temperature and temperature of the outdoor heat exchanger m Operation stops depending on the outdoor temperature In cooling operation when the outdoor temperature is below a certain level the compressor turns off 38 Control Specification SiBE061121 3 10
29. 45 Hz rising above 40 Hz dropping 2 30 45 Hz rising 25 40 Hz dropping 3 below 30 Hz rising below 25 Hz dropping lt 50 class gt A C B C m Ifthe error repeats the system is shut down m Reset condition Continuous run for about 60 minutes without any other error Supposed m Defective discharge pipe thermistor Causes Defective outdoor heat exchanger thermistor or outdoor temperature thermistor m Defective outdoor electronic expansion valve or coil m Refrigerant shortage m Defective four way valve m Water mixed in refrigerant m Defective stop valve m Defective outdoor unit PCB Troubleshooting AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Check No 01 Refer to P 121 Check No 01 Check the thermistors Di Replace the defective ischarge pipe thermistor thermistor Outdoor heat exchanger thermistor Outdoor temperature thermistor Check No 12 Refer to P 123 Check No 12 e NG Check the outdoor electronic Replace the outdoor expansion valve electronic expansion valve AN or the coil Check No 14 Refer to P 124 Check No 14 Check the refrigerant line Refer to the refrigerant line check procedure Refrigerant shortage x Four way valve x Water mixed Stop valve Replace the outdoor unit PCB R15286 97 Service Diagnosis SiBE061121 Troubleshooting 4 16 High Pressure C
30. 9 NIGHT SET Mode Outline Detail Function and Control When the OFF timer is set the NIGHT SET Mode is automatically activated The NIGHT SET Mode keeps the airflow rate setting The NIGHT SET Mode continues operation at the target temperature for the first one hour 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 to ensure comfortable sleeping conditions and also conserves electricity Cooling Target temperature SE 7 Operation stops at the set hours TIMER operation 0 5 C NIGHT SET Mode ON temperature shift R10870 Heating Radiant Target temperature A A TIMER operation 1 hour later NIGHT SET Mode ON R11813 24 Main Functions SiBE061121 1 10 ECONO Operation 25 The ECONO operation reduces the maximum operating current and the power consumption This operation is particularly convenient for energy saving oriented users It is also a major bonus for those whose breaker capacities do not allow the use of multiple electrical devices and air conditioners It is easily activated from the wireless remote controller by pushing the ECONO button m When this function is activated the maximum capacity also decreases m ECONO operation can only be set when the unit is running Pressing the ON OFF button on the remote controller cancels t
31. Defective over voltage detection circuit Defective PAM control part Disconnection of compressor harness Noise Momentary fall of voltage Momentary power failure Defective indoor unit PCB 118 Troubleshooting Troubleshooting 119 SiBE061121 AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Check the power supply voltage NO Voltage as rated Correct the power supply YES Check the connection of the compressor harness Loose or YES disconnected Reconnect it NO Precaution before turning on the power again Make sure the power has been off for at least 30 seconds YES Disturbance factors Check f i i Noise Power supply distortion eck for such factors for a long term Try to restart a few times Turn on the power again System restarted NO Repeat a few times Error again within 3 minutes after turning on the power Replace the indoor unit PCB Replace the outdoor unit PCB R15291 Service Diagnosis SiBE061121 Troubleshooting 4 27 Signal Transmission Error on Outdoor Unit PCB 50 Class Only ow po Remote GL Controller Display Method of Communication error between microcomputer mounted on the main microcomputer and PM1 Malfunction Detection Malfunction m The abnormality is determined when the data sent from the PM1 can not be received
32. Mode button for 5 seconds to exit from the service check mode When the remote controller is left untouched for 60 seconds it returns to the normal mode also R11672 Service Diagnosis SiBE061121 Troubleshooting 4 Troubleshooting 4 1 Error Codes and Description Service Diagnosis z Indoor Unit Outdoor Unit Page gt em e gt gt e 115 118 Refrigerant shortage Low voltage detection or over voltage detection Signal transmission error between indoor unit and outdoor unit Unspecified voltage between indoor unit and outdoor unit 88 71 79 Indoor unit PCB abnormality Freeze up protection control or heating peak cut control Fan motor DC motor or related abnormality Radiant panel temperature rise indoor electronic expansion valve motor operated valve abnormality freeze up protection 83 control Indoor heat exchanger thermistor or related abnormality Room temperature thermistor or related abnormality CO OI Radiant panel thermistor or related abnormality CO O1 U D D o o ol o o o D Q SI on ND CO O OD Outdoor unit PCB abnormality esch OL activation compressor overload Compressor lock DC fan lock Q U U b oO D Input overcurrent detection Four way valve abnormality Discharge pipe temperature control High pressure control in cooling Compressor system sensor abnormality Position sensor abnormality 101 DC vo
33. Procedure 13 Release the harness of the outdoor temperature thermistor from the hook 14 Lift and remove the electrical box Removal Procedure Electrical box o di Le ls Wi 208 Outdoor Unit RXG50K2V1B SiBE061121 3 4 Removal of PCBs Procedure AN Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work ae procedure Points 1 Disconnect the Preparation connectors S52 zt S102 co m Remove the electrical box S102 from the service according to the Removal of monitor PCB Electrical Box 2 Detach the 4 clamps with pliers and remove the service monitor PCB R5281 3 Remove the screws of the terminal board and the earth wire Dr Ke APT E a Pm e St Earth wire R12285 Terminal board 209 Removal Procedure SiBE061121 Outdoor Unit RXG50K2V1B step Procedure Points 4 Unfasten the hook on the right 5 Open the terminal 6 Disconnect the 1 Black harnesses 2 White 3 Red L1 Black L2 Brown N1 White N2 Blue 7 Disconnect the 2 connectors for the reactor HR1 HR2 R11473 Rem
34. Symptoms and Measures Symptom Check Item Details of Measure Page The unit does not operate Check the power supply Check if the rated voltage is supplied Po Check the type of the indoor unit Check if the indoor unit type is compatible with the outdoor unit Check the outdoor temperature Heating operation cannot be used when the outdoor temperature is 24 C or higher and cooling operation cannot be used when the outdoor temperature is below 10 C Diagnose with remote controller 76 indication Check the remote controller Check if address settings for the remote 22 addresses controller and indoor unit are correct Operation sometimes Check the power supply A power failure of 2 to 10 cycles stops air stops conditioner operation Operation lamp OFF Check the outdoor temperature Heating operation cannot be used when the outdoor temperature is 24 C or higher and cooling operation cannot be used when the outdoor temperature is below 10 C Diagnose with remote controller indication re ee A The unit operates but does Check for wiring and piping errors in not cool or does not heat the connection between the indoor unit and outdoor unit Check for thermistor detection errors Check if the thermistor is mounted securely Le Check for faulty operation of the Set the unit to cooling operation and check the outdoor electronic expansion valve temperature of the liquid pipe to see if the outdoor electronic expansi
35. T O D h FF 2 4 D BEN SCH DE EC EE a Th OFF Thermostat OFF D A E F B 9f 45 al S pe 55 Frequency Initial Setting lt Outline gt When starting the compressor the frequency is initialized according to the AD value and the Q value of the indoor unit Q value Indoor unit output determined from indoor unit volume airflow rate and other factors PI Control Determine Frequency Up Down by AD Signal 1 P control The AD 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 AD value When the AD value is low the frequency is lowered When the AD value is high the frequency is increased 3 Frequency management when other controls are functioning e When frequency is dropping Frequency management is carried out only when the frequency drops For limiting lower limit Frequency management is carried out only when the frequency rises 4 Upper and lower limit of frequency by PI control The frequency upper and lower limits are set according to the command on indoor unit When the indoor or outdoor unit quiet operation command comes from the indoor unit the upper limit frequency is lower than the usual setting 32 SiBE061121 Control Specification
36. and then reconnect it YES Check the power supply voltage NO N Voltage as rated Correct the connection Check the connection of connectors See Note Correct the power supply YES Start operation Y NO YES Check the power supply voltage NO Voltage as rated Replace the indoor unit PCB 1 Completed Error repeats Correct the power supply NO YES YES Replace the indoor unit PCB 1 NO Completed Completed R15270 i Note Check the following connector Model Type Floor Standing Type Terminal board Main PCB 78 Service Diagnosis Troubleshooting SiBE061121 4 3 Freeze up Protection Control or Heating Peak cut Control Remote Controller Display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes 79 en el Freeze up protection control During cooling operation the freeze up protection control operation halt is activated according to the temperature detected by the indoor heat exchanger thermistor Heating peak cut control During heating operation the temperature detected by the indoor heat exchanger thermistor is used for the heating peak cut control operation halt outdoor fan stop etc 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 65 C Shor
37. button is set to automatic lt Cooling gt The following drawing explains the principle of fan speed control for cooling Room thermistor temperature target temperature Fan speed MH 3 C 2 5 C M 2 C 1 5 C ML 1 C 0 5 C L R14635 lt Heating gt On heating operation the fan speed is regulated according to the indoor heat exchanger temperature and the difference between the room thermistor temperature and the target temperature D Note 1 During POWERFUL operation the fan rotates at H tap 50 rpm 2 The fan stops during defrost operation Function and Control 18 Main Functions SiBE061121 1 5 RADIANT Operation The RADIANT operation has 2 operation modes RADIANT 1 RADIANT operation with heating RADIANT 2 RADIANT operation only 1 5 1 Indoor Electronic Expansion Valve Motor Operated Valve Control Initializing with The indoor electronic expansion valve is initialized when turning on the power Power ON Opening Limit Opening limit control limits the opening of the indoor electronic expansion valve in order to keep Control a specified range during RADIANT operation Starting Starting operation control opens the indoor electronic expansion valve to a certain degree when Operation starting RADIANT operation The indoor electronic expansion valve is kept open for a certain Control period Target Panel When the starting operation control finishes the target panel temperature control starts and Temper
38. connector for the filter PCB S10 R11861 SiBE061121 Removal Procedure SiBE061121 Outdoor Unit RXG25 35K2V1B Step Procedure 10 Disconnect the connectors for the magnetic relay S50 and for the forced operation button PCB S100 S100 R11862 11 Disconnect the connector for the filter PCB HL93 HN3 cK Ce H S D we CNS W d L K Y 0 e d hr w LEN OS EN EEAS QJ Ly R11863 12 Release the harnesses from the hook 13 Release the harness for the outdoor temperature thermistor R11865 Removal Procedure 182 Outdoor Unit RXG25 35K2V1B SiBE061121 Step Procedure Points 14 Remove the 6 screws en wel HE N A ET Q iN KLLLKLLLL LL nen 15 Unfasten the 4 hooks and remove the main PCB R11867 m Refer to page 11 for detail S50 S100 S10 HL3 HN3 filter PCB S20 outdoor electronic expansion valve coil S40 overload protector S50 magnetic relay S70 fan motor S80 four way valve coil S90 thermistors S100 forced cooli
39. control on outdoor unit PCB defrost performance ex The frequency increases of 25 35 class the duration time of defrost lengthens OFF factory se SW4 C Improvement of Standard control Reinforced control on outdoor unit PCB defrost performance ex The frequency increases of 50 class the duration time of defrost lengthens For the location of the jumper and the switch refer to the following pages Indoor unit page 8 Outdoor unit page 11 13 225 Trial Operation and Field Settings SiBE061121 Application of Silicon Grease to a Power Transistor and a Diode Bridge 5 Application of Silicon Grease to a Power Transistor and a Diode Bridge Applicable All outdoor units using inverter type compressor for room air conditioner Models When the printed circuit board PCB of an outdoor unit is replaced it is required that silicon grease 1 is certainly applied to the heat radiation part the contact point to the radiation fin of the power transistor and diode bridge 1 Parts number of the silicon grease 1172698 Drawing number 3FB03758 1 Details The silicon grease is an essential article for encouraging the heat radiation of the power transistor and the diode bridge Applying the paste should be implemented in accordance with the following instruction Note There is the possibility of failure with smoke in case of bad heat radiation m Wipe off the old silicon grease completely on a radiation fin Apply th
40. easy to disconnect Note m Do not use a metal 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 Be careful so as not to burn the compressor terminals the name plate the heat exchanger fins 218 219 A WN SiBE061121 Part 8 Trial Operation and Field Settings w PUMO DOWN ODErAUON zenne teneerste Ee 220 z Forced Goolmd Bee EE 221 a RAL CCL AO ette aa ede eee ee 223 DN Ee Ee lui e wanten etende eneen eeen 224 4 1 When 2 Units are Installed in 1 Room nan enan enen e nennen 224 4 2 Standby Electricity Saving nuunsunrennnnenneennnrenrennnnenen vennen 225 4 3 Jumper and Switch Settings una snranrrnennnrenenenenesnnnenvens 225 Application of Silicon Grease to a Power Transistor and a Beleg ol 226 Trial Operation and Field Settings SiBE061121 Pump Down Operation 1 Pump Down Operation Outline In order to protect the environment be sure to conduct pump down operation when relocating or disposing the unit Remove the valve caps from the liquid stop valve and the gas stop valve Carry out forced cooling operation After 5 to 10 minutes close the liquid stop valve with a hexagonal wrench After 2 to 3 minutes close the gas stop valve and
41. for 9 Decision seconds Conditions m The error counter is reset when the data from the PM1 can be successfully received Supposed m Defective outdoor unit PCB Causes Troubleshooting AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Turn off the power and turn it on again l YES Error again Replace the outdoor unit PCB The cause can be an external factor other than the malfunction Observe the operating condition in long term R7185 Service Diagnosis 120 Check 5 Check 5 1 Thermistor Resistance Check Check No 01 121 SiBE061121 Disconnect the connectors of the thermistors from the PCB and measure the resistance of each thermistor using a tester The relationship between normal temperature and resistance is shown in the table and the graphs below Thermistor temperature C Resistance KQ CN CH wo o y woo C CC y y os CC R25 C 20 KQ B 3950 K R11905 aie eer Resistance range R11906 m For models in which the thermistor is directly mounted on the PCB disconnect the connector for the PCB and measure R3460 Service Diagnosis SiBE061121 Check 5 2 Fan Motor Connector Check Check the connection of connector Check the motor power supply voltage output pins 4 7 Check the motor control voltage pins 4 3 Check the rotation command voltage pins 4 2 Check the r
42. four way valve is carried out after the operation stopped Detail OFF delay switch of four way valve The four way valve coil is energized for 150 160 seconds after the operation is stopped 3 3 3 Four Way Valve Operation Compensation Outline At the beginning of the operation as the four way valve is switched the pressure difference to activate the four way valve is acquired by having output frequency which is more than a certain fixed frequency for a certain fixed time Detail Starting Conditions When starting compressor for heating When the operation mode changes from heating to cooling When starting compressor for defrosting When starting compressor for heating after defrosting When starting compressor for the first time after resetting with the power ON When starting compressor after the fault of switching over cooling heating The lower limit of frequency keeps A Hz for B seconds with any conditions 1 through 6 above ae SS Heating DEENEN B seconds 45 o 3 3 4 3 minute Standby Turning on the compressor is prohibited for 3 minutes after turning it off Except when defrosting DPPH 3 3 5 Compressor Protection Function When turning the compressor from OFF to ON the upper limit of frequency is set as follows The function is not activated when defrosting Hz Frequency C B sec Time R13528 Function and Control 34 Control Specification SiBE061121 3 4 Discharge Pipe Tem
43. is controlled by followings Target discharge pipe temperature Actual discharge pipe temperature e Previous discharge pipe temperature 42 Control Specification SiBE061121 3 12 Malfunctions 3 12 1 Detection of Overcurrent and Overload Outline An excessive output current is detected and the OL temperature is observed to protect the compressor Detail m If the OL compressor head temperature exceeds 120 130 C the system shuts down the compressor m Ifthe inverter current exceeds 9 25 20 A depending on the model the system shuts down the compressor 3 12 2 Refrigerant Shortage Control Outline I Detecting by power consumption If the power consumption is below the specified value and the frequency is higher than the specified frequency it is regarded as refrigerant shortage The power consumption is low comparing with that in the normal operation when refrigerant is insufficient and refrigerant shortage is detected by checking power consumption Refrigerant shortage zone Power consumption 55 Hz Frequency R14621 ll Detecting by discharge pipe temperature If the discharge pipe temperature is higher than the target discharge pipe temperature and the outdoor electronic expansion valve is fully open for more than the specified time it is regarded as refrigerant shortage Target discharge pipe temperature Refrigerant shortage zone R1391 lll Detecting by the difference of temperature If the dif
44. may work to stop the operation HEAT or lt 3 4 5MXS gt 15 24 C RADIANT lt RXG gt 15 24 C Indoor temperature 10 30 C Outdoor temperature lt 2 3 4 5MXS gt 10 46 C e A safety device may work to stop the operation lt RXG gt 10 46 C e Condensation may occur on the indoor unit and drip Indoor temperature 18 32 C Indoor humidity 80 max e Operation outside this humidity or temperature range may cause a safety device to disable the system Operation Manual 54 Operation Manual SiBE061121 2 6 Adjusting the Airflow Direction and Rate Adjusting the Airflow Direction and Rate You can adjust the airflow direction to increase your comfort B To start auto swing Upper and lower airflow direction Press e C is displayed on the LCD e The flap horizontal blade will begin to swing B To set the flap at desired position e This function is effective while flap is in auto swing mode Press when the flap has reached the desired position e CG disappears from the LCD B To adjust the louvers at desired position Hold the knob and move the louvers e You will find a knob on the left side and the right side blades e When the unit is installed in the corner of a room the direction of the louvers vertical blades should be facing away from the wall If they face the wall the wall will block off the wind causing
45. operating if the discharge pipe temperature exceeds a certain value the outdoor electronic expansion valve opens and the refrigerant runs to the low pressure side This procedure lowers the discharge pipe temperature 41 Function and Control SiBE061121 Control Specification 3 11 7 Control for Disconnection of the Discharge Pipe Thermistor Outline Detail The disconnection of the discharge pipe thermistor is detected by comparing the discharge pipe temperature with the condensing temperature If the discharge pipe thermistor is disconnected the outdoor electronic expansion valve opens according to the outdoor temperature and the operation frequency and operates for a specified time and then stops After 3 minutes of waiting the operation restarts and checks if the discharge pipe thermistor is disconnected If the discharge pipe thermistor is disconnected the system stops after operating for a specified time If the disconnection is detected repeatedly the system is shut down When the compressor runs for 60 minutes without any error the error counter is reset When the starting control cooling A seconds heating B seconds finishes the detection timer for disconnection of the discharge pipe thermistor C seconds starts When the timer is over the following adjustment is made 1 When the operation mode is cooling When the following condition is fulfilled the discharge pipe thermistor disconnection is ascertained Disc
46. operation switch PCB R15383 5 Disconnect the selective connector for Relay standby electricity connector saving and pull out the EE relay connector en KY R13507 6 Cut the clamp R11858 Removal Procedure 180 Outdoor Unit RXG25 35K2V1B Step Procedure Release the harness 8 Cut the clamps at the 2 R11859 locations 6 R11860 Disconnect the
47. rotation command voltage between the pins 2 4 is 0 15 VDC Keep operation off and power off Connect the connector S70 Check whether 2 pulses 0 15 VDC are output at the pins 1 4 when the fan motor is rotated 1 turn by hand oak wh 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 outdoor fan motor If OK in both steps 2 and 4 Replace the outdoor unit PCB PCB Actual rotation pulse output 0 15VDC Rotation command pulse input 0 15VDC 15 VDC 320 VDC R10811 127 Service Diagnosis SiBE061121 Check 5 9 Installation Condition Check Check No 17 Installation condition check Check the allowable dimensions of the air suction and discharge area Change the installation location or direction Is the discharged air short circuited Change the installation location or direction Is the outdoor heat YES exchanger very dirty Clean the outdoor heat exchanger Is the airflow blocked by obstacles or winds blowing in the opposite direction Change the installation location or direction Check the outdoor temperature The outdoor temperature should be 46 C or lower R14390 5 10 Discharge Pressure Check Check No 18 Service Diagnosis Discharge pressure check NO Replace the compressor YES
48. screws R15057 3 Remove the service cover Service cover R15058 Removal Procedure 144 Indoor Unit SiBE061121 step Procedure Points 4 Unfasten the hook and disconnect the relay connector for the display PCB R15059 5 Remove the screw m Use a piece of cloth to cover left with a flat n protect the surface of the screwdriver indoor unit R15126 6 Remove the screw 145 Removal Procedure Indoor Unit SiBE061121 Procedure E 7 8 9 146 R15287 R15061 R15063 Air outlet cover ASSY NG Unfasten the 8 hooks Remove the air outlet Turn over the air outlet cover ASSY and cut the cover ASSY 10 Release the harnesses from the hooks Removal Procedure Indoor Unit SiBE061121 Step Procedure 11 Lift up the cover of the lamp cover ASSY with a flat screwdriver cover ASSY R15064 12 Open the cover R15065 13 Unfasten the hook and remove the display PCB Display PCB R15066 14 Unfasten the hook and disconnect the Hook connector for the main PCB S56 R15067 147 Removal Procedure SiBE061121 Indoor Unit 1 5 Removal of Horizontal Blade Procedure AP Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work step
49. signal generated Replace the outdoor fan motor Replace the outdoor unit PCB R14410 Service Diagnosis SiBE061121 Troubleshooting 4 13 Input Overcurrent Detection gt J el Remote CO Controller Display Method of An input overcurrent is detected by checking the input current value with the compressor Malfunction running Detection Malfunction m The following current with the compressor running continues for 2 5 seconds Decision Cooling Heating Above 9 25 20 A depending on the model Conditions m The upper limit of the current decreases when the outdoor temperature exceeds a certain level Supposed m Defective compressor Causes m Defective power module m Defective outdoor unit PCB m Short circuit Troubleshooting AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Check No 15 An input overcurrent may result from wrong internal wiring If the system is interrupted by an input Refer to P 125 overcurrent after the wires have been disconnected and reconnected for part replacement check the wiring again Check No 17 Check No 17 Check the installation condition Refer to P 128 Start operation and measure the input current Check No 18 Refer to P 128 i NO e eech Replace the outdoor unit PCB YES Turn off the power and disconnect the harnesses U V and W Check No 15 Inverter checker Check with the inverter checker Part No
50. specified cable for wiring between the indoor and outdoor units Make the connections securely and route the cable properly so that there is no force pulling the cable at the connection terminals Improper connections may cause excessive 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 fire Placing heavy items on the power cable and heating or pulling the power cable may damage the cable Do not mix air or gas other than the specified refrigerant R 410A R 22 in the refrigerant system If air enters the refrigerating system an excessively high pressure results Causing equipment damage and injury If the refrigerant gas leaks be sure to locate the leaking point and repair it before charging the refrigerant After charging refrigerant make sure that there is no refrigerant leak If the leaking point cannot be located and the repair work must be stopped be sure to perform pump down and close the service valve to prevent the refrigerant gas from leaking into the room The refrigerant gas itself is harmless but it may generate toxic gases when it contacts flames such as fan and other
51. the cooling or heating efficiency to drop e If the flap is in the way press on the remote controller to move the flap out of the way and then adjust the louvers 14 55 Operation Manual SiBE061121 Operation Manual Adjusting the Airflow Direction ZS and Rate B To adjust the airflow rate setting Press el e Each pressing of e advances the airflow rate setting in sequence DA D A D D gt p gt k kan Auto Indoor unit quiet Low Middle low Vi Vi EN en _ mm m E High Middle high Middle e When the airflow is set to 2 indoor unit quiet operation will start and the noise from the unit will become quieter e In indoor unit quiet operation the airflow rate is set to a weak level e In DRY or RADIANT operation the airflow rate setting is not variable E Note on the angles of the flap e The flap swinging range is the same by all operation See the figure Upper limit Lower limit 45 E Note on airflow rate setting e At smaller airflow rates the cooling heating effect is also smaller CAUTION e Always use a remote controller to adjust the angles of the flap If you attempt to move it forcibly with hand when it is swinging the mechanism may be broken e Be careful when adjusting the louvers Inside the air outlet a fan is rotating at a high speed 15 Operation Manual Operation Manual SiBE061121 2 7 POWER
52. viewpoint of global environment protection do not discharge the refrigerant gas in the atmosphere Make sure to collect all the refrigerant gas gas is empty in the circuit Be sure to apply nitrogen replacement when heating up the brazed 4 gt ie Heat up the brazed parts indicated by the arrows LU Ss 217 Removal Procedure SiBE061121 Procedure Remove the 2 nuts of the compressor II IW Ip ij 1 ryt HEN Pj Wd L A WATT TD Lk hi Taal J Wd j UDA li Waa ul DUET RET H Tt Heat up the brazed part of the discharge side and disconnect Heat up the brazed part of the suction side and disconnect Lift the compressor up and remove it Removal Procedure Outdoor Unit RXG50K2V1B 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 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 Cut pipes on the main unit with a tube cutter in order to make it
53. 21 1 4 Removal of Electrical Box PCBs Procedure AP 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 electrical box Remove the screw of the service cover HN din mn Tim Ln l i iih 4 wl GG d ge Remove the service EE Vull cover wll Mun mm All ST Remove the screw and wire clamp R15132 Remove the 4 screws and disconnect the connecting wires 135 Removal Procedure SiBE061121 Indoor Unit Procedure Unfasten the hook and Lower for indoor electronic disconnect the relay expansion valve connector for the indoor electronic expansion valve coil R15030 Unfasten the hook and Upper for fan motor disconnect the relay connector for the fan motor R150
54. 24 Check No 14 Refer to P 124 Service Diagnosis Troubleshooting AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Four way valve coil YES disconnected loose Correct it YES Harness out of connector Reconnect it Check the continuity of the four way valve coil and harness Disconnect the harness from the connector Resistance NO between harnesses about Replace the four way 1000 2000 Q valve coil YES Check No 13 NG Check the four way valve Replace the outdoor switching output unit PCB OK i YES y ae Reconnect in position NO Check No 01 NG Check the thermistors Replace the defective thermistor OK Check No 14 NG Check the refrigerant l Refer to the refrigerant line ine x Refrigerant shortage check procedure x Water mixed Stop valve OK Replace the four way valve defective or dust clogged R14441 96 Troubleshooting SiBE061121 4 15 Discharge Pipe Temperature Control l Remote ro Controller Display Method of An error is determined with the temperature detected by the discharge pipe thermistor Malfunction Detection Malfunction m If the temperature detected by the discharge pipe thermistor rises above A C the Decision compressor stops Conditions m The error is cleared when the discharge pipe temperature has dropped below B C lt 25 35 class gt 1 above
55. 31 Remove the 3 screws R15032 Removal Procedure 136 it Uni r oo Ind re du ce Pro is box ctrical aage The mn b i ea W no box ctrical Els 33 150 R 1 112 iBEO6 SiB P cht BR D p e A Deelt min Os a NG Ge SCH Z Ke di n V Deele r cn ii ne Ze UT ln Z w A al ric elect e the Tl SC baie ebe Jar Ed X CO e TE J mn EN dh ha Zen H E oe GO r ve O trica Elec Deg SSS re du dee a OV m Re SiBE061121 Indoor Unit Procedure Unfasten the hook of each connector S6 S32 S33 S34 S26 Disconnect the connectors rs af 8 Za Vo Cd ernie npe ceerd net EH A LE ee Wray CSN nin ander E OA oi b d Leed Ze eg L t s Ee S30 ee ee Ee 5 S46 R15036 S6 swing motor S26 service PCB S30 indoor electronic expansion valve coil S32 indoor heat exchanger thermistor S33 room temperature thermistor S34 radiant panel thermistors S46 display PCB Release the harnesses from the hook
56. 35K2V1B nnen eneen ereen eeneenenn 167 2 1 Removal of Outer Panels Fan Motor 167 2 2 Removal of Electrical Bon 176 25 ZEIEN eben 179 2 4 Removal of Reactor Partition Plate 187 2 5 Removal of Sound Blankets 2 22 oe areerverssesnieertentntsersser vrare tendntdsenndnke 189 2 6 Removal of Four Way Vahye uunssnansnennsen venen eener venen vens 191 2 7 Removal of Compresseor a aaan annen en venene ennen venen venen ennen r venen vens 194 3 Outdoor Unit RXG5OK2VIB eenen een ennennen eenen 196 3 1 Removal of Outer Panels irene Eege 196 3 2 Removal of Outdoor Fan Fan Motor 200 3 93 Removalof Electrical BOX EE 204 OA Remova O POB EE 209 3 5 Removal of Sound Blankets Thermistors eneen 212 3 6 Removal of Four Way Valve un esann eneen enn eeneneenens ennen 214 3 7 Removal of Outdoor Electronic Expansion Valve 215 3 8 Removal of Compresso ana aan annen en eenene eenen venen venene senen venen vens 216 131 Removal Procedure SiBE061121 Indoor Unit 1 Indoor Unit 1 1 Removal of Front Panel Procedure AP Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work ae procedure Pots Appearance feature Indoor unit ON OFF button Open the front panel Front band stopper es Release the strings ee m When reassembling hang from the hooks the strings on the hooks Unfasten the 3 lower hooks and remove the fro
57. 55 1 11 Printed Circuit Board Connector Wiring Diagram SiBE061121 Outdoor Unit 2 2 RXG50K2V1B Connectors and PCB 1 Main PCB Other Parts 1 S10 Connector for terminal board indoor outdoor transmission 2 S20 Connector for outdoor electronic expansion valve coil 3 S40 Connector for overload protector 4 51 S101 Connector for service monitor PCB 5 S70 Connector for fan motor 6 S80 Connector for four way valve coil 7 90 Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe 8 AC1 AC2 Connector for terminal board power supply 9 E1 E2 Connector for earth 10 HR1 HR2 Connector for reactor 11 U V W Connector for compressor 12 FU1 Fuse 30 A 250 V 13 FU2 FU3 Fuse 3 15 A 250 V 14 V2 V3 V5 V6 V11 Varistor PCB 2 Service Monitor PCB 1 52 102 Connector for main PCB 2 LEDA LED for service monitor green 3 SW1 Forced cooling operation ON OFF switch 4 SW4 C Switch for improvement of defrost performance x Refer to page 225 for detail Printed Circuit Board Connector Wiring Diagram 12 Outdoor Unit PCB Detail 13 SiBE061121 PCB 1 Main PCB AC1 E1 FU2 E2 V3 amp GRN aT 70 C o EN j ik L oss eis e O1S2 oa 3a R229 wd ete wide UE re g sf fa oO a e de rar Bra E i AZCS EEE 8 z Se 8 c 9 HAY WHT 6 l HR2 TER HR2 8 E H r ce 4100F728 1 s m cat a a zt 3 6 T R Ds 4 O E
58. 6 Press to select the desired time y e The time can be set between 0 00 and 23 50 in 10 minute intervals Back e To return to the ON OFF TIMER mode setting press e Go to step 9 when setting the OFF TIMER f Press D e The time will be set e OPW and the temperature blink A Select Ge Press to select the desired temperature v e The temperature can be set between 10 C and 32 C COOL or AUTO The unit operates at 18 C even if it is set at 10 to 17 C HEAT or AUTO The unit operates at 30 C even if it is set at 31 to 32 C e To return to the time setting press CJ e The set temperature is only displayed when the mode setting is on 9 Press E e Be sure to direct the remote controller toward the indoor unit and check for a receiving tone and flashing the OPERATION lamp e The temperature is set while in ON TIMER operation and the time is set while in OFF TIMER operation e The next reservation screen will appear e To continue further settings repeat the procedure from step 4 e The TIMER lamp lights yellow Display 10 Press 7 to complete the setting e is displayed on the LCD and WEEKLY TIMER operation is activated e A reservation made once can be easily copied and the same settings used for another day of the week Refer to copy mode E Notes on WEEKLY TIMER operation e Do not forget to set the clock on the remote controller first e The day of
59. ANT operation with heating it is not available in RADIANT 2 RADIANT operation only 26 Main Functions SiBE061121 1 12 Other Functions 1 12 1 Hot Start Function In order to prevent the cold air blast that normally comes when heating operation is started the temperature of the indoor heat exchanger is detected and either the airflow is stopped or is made very weak thereby carrying out comfortable heating of the room The cold air blast is also prevented using a similar control when the defrosting operation is started or when the thermostat is turned ON 1 12 2 Signal Receiving Sign When the indoor unit receives a signal from the remote controller the unit emits a signal receiving sound 1 12 3 Indoor Unit ON OFF Button An ON OFF button is provided on the display of the unit m Press this button once to start operation Press once again to stop it B This button is useful when the remote controller is missing or the battery has run out m The operation mode refers to the following table Operation mode Temperature setting Airflow rate AUTO ON OFF button R14638 lt Forced cooling operation gt Forced cooling operation can be started by pressing the ON OFF button for 5 to 9 seconds while the unit is not operating Refer to page 221 for detail D Note When the ON OFF button is pressed for 10 seconds or more the forced cooling operation is stopped 1 12 4 Titanium Apati
60. Address EXIST CUT 2 R14631 esch Trial Operation and Field Settings 224 Field Settings SiBE061121 4 2 Standby Electricity Saving Outline 25 35 Class Only This function turns power supply OFF to the outdoor unit and sets the indoor unit into energy saving mode thus reducing the power consumption of the air conditioner Detail 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 Function OFF Function ON The standby electricity saving function is turned OFF before shipping R11820 AN Caution Before connecting or disconnecting the selective connector for standby electricity saving make sure that the main power supply is turned OFF 4 3 Jumper and Switch Settings Jumper Function When connected When cut factory set Fan speed setting Fan speed setting Fanrpm is set to 0 on indoor unit PCB when compressor Remote controller lt Fan stop gt stops for thermostat setting OFF effective only at cooling operation JC Power failure Auto restart The unit does not resume on indoor unit PCB recovery function operation after recovering from a power failure Timer ON OFF settings are cleared J5 Improvement of Standard control Reinforced
61. Air Direction Contro Air Fite Temperature Control wm o Le O O o SS Gross WEL o s T a oS S Sound denk H M L SL Gl ET 38 32 26 23 39 32 26 22 39 33 27 24 40 33 27 23 eve Outdoor Unit Casing Color EE Refrigerant dege LI De 085 oS 1 05 lt a Motor Ott TWB TR Running Curent Rate LA 20 29 2710 99 30 30 A40 588 558 539 Starting Current ALAT ege Ce Sound Pressure H SL dB A 46 43 47 44 48 44 48 45 Level ale Power Level Drawing No 3D071592 _ NE kcal n kW x 860 Note m The data are based on the conditions shown in the table below Cooling Piping Length Btu h kW x 3412 cfm m min x 35 3 Indoor 27 CDB 19 CWB Indoor 20 CDB S Outdoor 35 CDB 24 CWB Outdoor 7 CDB 6 CWB Specifications 4 Specifications SiBE061121 50 Hz 220 230 240 V Indoor Wat LELIE Heating o O Capacity Rated Min Max 17 100 5 800 19 100 e a LE S SE Heat Insulation a C le DEE Front Panel Color White 105 G74 m min 8 9 314 deer of 7 3 258 50212 Cross Flow Fan Fan 32 5 Steps Quiet Auto Air Direction Control Air Fite 35 35 35 Temperature Control 28 Sound Sound Power Level B BH Outdoor Unit RXG50K2V1B Casing Color Hermetically Sealed Swing Type Compressor 2YC36BXD 1 100 Refrigerant PCS 0 65 R400 16 m3 min 50 9 1 797 45 0 1 589
62. C or Y 0 5 C zone B continues for 10 min X 0 5 C 17 5 C or Y 0 5 C zone B continues for 10 min Zone C Thermostat ON 0 5 C Zone A Thermostat OFF R11581 21 Function and Control SiBE061121 Main Functions 1 7 Automatic Operation Outline Automatic Cooling Heating Function When the automatic operation mode is selected with the remote controller the microcomputer automatically determines the operation mode as cooling or heating according to the room temperature and the set temperature at start up The unit automatically switches the operation mode to maintain the room temperature at the set temperature Detail Ts set temperature set by remote controller Tt target temperature determined by microcomputer Tr room thermistor temperature detected by room temperature thermistor C correction 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 operation mode switching point are as follows Tr means the room thermistor temperature 1 Heating Cooling switching point Tr gt Tt 3 0 C 2 Cooling Heating switching point Tr lt Tt 2 5 C 3 Thermostat ON OFF point is the same as the ON OFF point of cooling or heating operation 4 During initial operation Tr gt Ts Cooling operation Tr lt Ts Heati
63. CB Turn off the power Disconnect the harnesses U V and W Check No 15 Inverter checker Check with the inverter checker Part No 1225477 YES Correct the power supply or replace the outdoor unit PCB NO Replace the compressor R14625 Service Diagnosis 102 Troubleshooting SiBE061121 Troubleshooting 50 class AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Check No 15 Refer to P 128 NO Voltage as rated Correct the power supply YES Check No 18 Check the discharge pressure NO Replace the stop valve YE S Check the connection Electrical components or compressor harnesses connected as specified Reconnect them as specified YES Turn on the power Check the electrolytic capacitor voltage Replace the outdoor unit PCB Turn off the power Disconnect the harnesses U V and W m We Check No 15 Inverter checker Check with the inverter checker Part No 1225477 YES Correct the power supply or replace the outdoor unit PCB NO Replace the compressor R14626 103 Service Diagnosis SiBE061121 Troubleshooting 4 19 DC Voltage Current Sensor Abnormality 25 35 Class Remote Controller Display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Troubleshooting Service Diagnosis keng i gt al
64. D for service monitor green PCB 2 Display PCB 1 S56 2 S1W H1P H2P H3P O1 Connector for main PCB Forced cooling operation ON OFF button LED for operation green LED for timer yellow LED for RADIANT operation red PCB 3 Service PCB 1 S27 2 S2W 1 Connector for main PCB Address setting jumper x Refer to page 224 for detail Printed Circuit Board Connector Wiring Diagram SiBE061121 PCB Detail Printed Circuit Board Connector Wiring Diagram PCB 1 Main PCB Sen S32 za S33 Tai S34 a7 S26 n e S46 e u FG ET C Apr Ee hanvat NAUNA Indoor Unit S21 e JC JB EES UH LEDA eS 77 cooseicoapmanicocesace z a II Biz a aft 2 oT he bf gO S1 TO HD OC tH H lt Q OZ Os D D m sch Tes wi S 5 g S lt S F1U B no no Z RK a _ lt 2P273247 1 Indoor Unit SiBE061121 PCB 2 Display PCB a ae PbF 5P27 3252 DI 1 Ad H S56 er Io S1W Q z EX730 O un HeP HIP bes SOA Cis H3P H1P H2P 3P273252 1 PCB 3 Service PCB 3P273254 1 Printed Circuit Board Connector Wiring Diagram SiBE061121 2 Outdoor Unit 2 1 RXG25 35K2V1B Connectors and PCB 1 Filter PCB Other Parts 1 2 NO Ol B W oo PCB 2 Main PCB S11 AC1 AC2 S E1 E2 HL2 HN2
65. DAIKIN SiBE061121 Service WELL Inverter Pair Floor Standing Type K Series Applied Models Inverter Pair Heat Pump eHeat Pump Indoor Unit FVXG25K2V1B FVXG35K2V1B FVXG50K2V1B Outdoor Unit RXG25K2V1B RXG35K2V1B RXG5S0K2V1B SiBE061121 Inverter Pair Floor Standing Type K Series Table of Contents SiBE061121 Ne MED OCIC HOM sical stash eect neten eeen vi del Sate Cautions zinnen teen oehoes vi t2 Used Mi een LEE X Part 1 List of Functions imerssternsrbeuwsennvensebebaendelsuennenkbindenvendnnnneeend A le tee ien EE 2 Part 2 Sp cifications ee O UE ne Mere Lu EE 4 Part 3 Printed Circuit Board Connector Wiring Diagram 6 iere Lie ie Arend ee Naalt E See eeen EE 7 2 erfree n TEEN 10 21 IRAG25 SKOV NEE 10 2 2 CR ELTER 12 Part 4 Function and Control nanannannansansnnannansannnnnnnsnnannnnnnnonnen Ts Malin FUNCUONS zat ensen sneerde metende tee een ele 15 1 1 Temperature CONO snorren verderen dndiek etste bekeek 15 1 2 Frequency HEIEREN 15 13 Erem Direction Control ooien nad 17 1 4 Fan Speed Control for Indoor Unit annen eneen 18 15 RADIANT Operation ze eden Ee Eee 19 146 Program Dy Operati Oi EE 21 12 eu E reen BEE 22 1 28 heimosta EIER 23 EZ NIGHT SET MOGO EE 24 bTOIEGONOG OD Cl allOn ertsen bende deden tenen 25 1 11 Inverter POWERFUL Operation aan ennene eenen enennn ennen 26 del 2 OMME FUNCUONS EE 27 2 Function O
66. Defective outdoor unit PCB Silicon grease is not applied properly on the radiation fin after replacing the outdoor unit PCB Service Diagnosis SiBE061121 Troubleshooting AN Caution connectors or parts may be damaged Check No 17 Refer to P 128 Turn off the power and turn it on again to start the system Check No 19 Refer to P 129 YES YES Has PCB been replaced Error displayed again NO Check the radiation fin temperature NO Above A C Check No 19 Check the outdoor fan or related NG OK Radiation fin dirty EE Slightly dirty Check No 17 Check the installation condition 25 35 class 50 class EE Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Check if the silicon grease applied properly on the radiation fin If not apply it ol See Note Silicon grease Part No 1172698 Replace the outdoor unit PCB Replace the fan motor Correct the connectors and fan motor leads Replace the outdoor unit PCB Clean up the radiation fin R14445 D Note Refer to Application of silicon grease to a power transistor and a diode bridge on page 226 for detail Service Diagnosis 112 Troubleshooting SiBE061121 4 24 Output Overcurrent Detection Remote Controller Display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes 113
67. Defrost Control Outline Defrosting is carried out by the cooling cycle reverse cycle The defrosting time or outdoor heat exchanger temperature must be more than a certain value to finish Detail Conditions for Starting Defrost The starting conditions is determined with the outdoor temperature and the outdoor heat exchanger temperature The system is in heating operation The compressor 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 C Hz B Hz Frequency PI control 0 Hz 120 sec D sec E sec F sec NT Compressor OFF O F 1 our way valve OEF G ON Fan OFF Po Outdoor electronic expansion valve opening Initial opening R14620 39 Function and Control SiBE061121 Control Specification 3 11 Outdoor Electronic Expansion Valve Control Outline Detail Function and Control The following items are included in the outdoor electronic expansion valve control Outdoor electronic expansion valve is fully closed 1 2 Outdoor electronic expansion valve is fully closed when turning on the power Pressure equalizing control Open Control 1 Outdoor electronic expansion valve control when starting operation 2 Outdoor electronic expansion valve control when the frequency changes 3 Outdoor e
68. EEEN 1 Ne Screwdriver Push here A R13824 221 Trial Operation and Field Settings SiBE061121 Outdoor Unit 50 class Trial Operation and Field Settings Forced cooling operation ON OFF switch Forced Cooling Operation a R14176 222 Trial Operation SiBE061121 3 Trial Operation esch Outline Measure the power supply voltage and make sure that it falls in the specified range 2 Trial operation should be carried out in either cooling or heating operation 3 Carry out the trial operation in accordance with the operation manual to ensure that all functions and parts such as flap movement are working properly m The air conditioner requires a small amount of power in its standby mode If the system is not to be used for some time after installation shut off the circuit breaker to eliminate unnecessary power consumption m If the circuit breaker trips to shut off the power to the air conditioner the system backs up the operation mode The system then restarts operation with the previous operation mode when the circuit breaker is restored In cooling operation select the lowest programmable temperature in heating operation select the highest programmable temperature B Trial operation may be disabled in either operation mode depending on the room temperature m After trial operation is complete set the temperature to a normal level 26 C
69. FUL Operation zl POWERFUL Operation POWERFUL operation quickly maximises the cooling heating effect in any operation mode You can get the maximum capacity B To start POWERFUL operation Powerful Press during operation e POWERFUL operation ends in 20 minutes Then the system automatically operates again with the previous settings which were used before POWERFUL operation e CP is displayed on the LCD To cancel POWERFUL operation Powerful Press again e 4 disappears from the LCD Powerful Example Normal operation POWERFUL operation Rack to normal operation e When you want to get the e POWERFUL operation will cooling effect quickly start work for 20 minutes the POWERFUL operation E Notes on POWERFUL operation e When using POWERFUL operation there are some functions which are not available e POWERFUL operation cannot be used together with RADIANT2 ECONO or OUTDOOR UNIT QUIET operation Priority is given to the function of whichever button is pressed last On Off e POWERFUL operation can only be set when the unit is running Pressing causes the settings to be canceled and the P disappears from the LCD e POWERFUL operation will not increase the capacity of the air conditioner if the air conditioner is already in operation with its maximum Capacity demonstrated e In COOL HEAT and RADIANT1 oper
70. For the sake of this wrap the four way valve with wet cloth and provide water so that the cloth does not dry Heat up every brazed part in turn and Note disconnect m Do not use a metal 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 Removal Procedure 214 Outdoor Unit RXG50K2V1B SiBE061121 3 7 Removal of Outdoor Electronic Expansion Valve Procedure AN Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Procedure Points O Pull out the outdoor electronic expansion Outdoor electronic expansion valve coil valve coil R15369 Remove the sheets of AP Warning R11398 Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine m Before working make sure that the refrigerant gas is empty in the circuit Be sure to apply nitrogen replacement when AP heating up the brazed Mell If the refrigerant gas leaks during work ventilate the room If the refrigerant gas is parts of the outdoor exposed to flames toxic gas electronic expansion may be generated valve and remove it Gn EN AP Caution From the
71. H R12287 Cut the clamp and pull out the outdoor heat exchanger thermistor exchanger Sein 213 Removal Procedure SiBE061121 Outdoor Unit RXG50K2V1B 3 6 Removal of Four Way Valve Procedure AN Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work step Procedure Points O Remove the screw and remove the four way AP Warning valve coil H Be careful not to get yourself SS burnt with the pipes and other Four way parts that are heated by the valve coil gas brazing machine AP Warning If the refrigerant gas leaks during work ventilate the room If the refrigerant gas is exposed to flames toxic gas may be generated AP Caution From the viewpoint of global environment protection do not discharge the refrigerant gas in the atmosphere Make sure to collect all the refrigerant gas m Before working make sure that the refrigerant Cautions for restoration gas is empty in the circuit 1 Restore the piping by non Be sure to apply nitrogen oH oxidation brazing replacement when d 2 Itis required to prevent the heating up the brazed carbonization of the oil inside the four way valve and the Heat up the brazed part j deterioration of the gaskets of the four way valve affected by heat Keep and disconnect below 120 C
72. HR1 FU1 FU3 V2 V3 S10 S20 S40 S50 S70 S80 S90 S100 HL3 HN Outdoor Unit Connector for main PCB Connector for terminal board Terminal for earth Connector for main PCB Connector for reactor Fuse 3 15 A 250 V Fuse 20 A 250 V Varistor Connector for filter PCB Connector for outdoor electronic expansion valve coil Connector for overload protector Connector for magnetic relay Connector for fan motor Connector for four way valve coil Connector for thermistors outdoor temperature outdoor heat exchanger discharge pipe Connector for forced cooling operation switch PCB Connector for filter PCB Connector for reactor Connector for compressor Fuse 3 15 A 250 V LED for service monitor green Varistor Jumper for improvement of defrost performance Refer to page 225 for detail PCB 3 Forced Cooling Operation Switch PCB 1 S110 2 SWI Connector for main PCB Forced cooling operation ON OFF switch Printed Circuit Board Connector Wiring Diagram 10 Outdoor Unit SiBE061121 PCB Detail PCB 1 Filter PCB HR1 HN2 S11 JC CH HEN H Le Cp Cu SUL FORN l e GRN SMRMIGA U sl H CIE Y PTC2 mba BRN T3 15A Fab ed h hp ASA MER dj HL2E S50 on main PCB 3P254234 1 PCB 2 Main PCB Rie Brie nies Beie DV m PCB2619 71 6WHT FU2 S100 S50 2P254206 9 PCB 3 Forced Cooling Operation Switch PCB S110 3P2557
73. Malfunction starts Detection m The system checks the compressor current right after the compressor starts Malfunction m The power supply voltage and the DC voltage is obviously low or high Decision m The compressor current does not run when the compressor starts Conditions Supposed m Disconnection of reactor Causes m Disconnection of compressor harness m Defective outdoor unit PCB m Defective compressor Troubleshooting AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Turn off the power Check the connection of the reactor NO Connection OK Connect it properly YES Check the connection of the compressor NO Connection OK Connect it properly YES Disconnect the reactor from the outdoor Check the reactor unit PCB and measure the resistance value between reactor terminals with tester NO Replace the reactor YES Disconnect the compressor relay harness Check the compressor from the outdoor unit PCB and measure the resistance value between the each 3 terminals of the compressor with tester Between all each terminal 10 Q or less NO Replace the compressor or the compressor relay harness YES Restart the operation again and if the error occurs again replace the outdoor unit PCB R7174 Service Diagnosis 100 Troubleshooting SiBE061121 4 18 Position Sensor Abnormality Remote Controller Di
74. N Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Check No 01 Check the connection of connectors Refer to P 121 Correct the connection Check No 01 Check the thermistor resistance value Replace the thermistor Replace the indoor unit PCB R14406 CH Indoor heat exchanger thermistor CO Room temperature thermistor CC Radiant panel thermistor 85 Service Diagnosis SiBE061121 Troubleshooting 4 7 Signal Transmission Error between Indoor Unit and Outdoor Unit Remote Controller Display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Service Diagnosis gt p TN m7 The data received from the outdoor unit in indoor unit outdoor unit signal transmission is checked whether it is normal The data sent from the outdoor unit cannot be received normally or the content of the data is abnormal Reduction of power supply voltage Wiring error Breaking of the connection wires between the indoor and outdoor units wire No 3 Defective outdoor unit PCB Defective indoor unit PCB Disturbed power supply waveform 86 Troubleshooting Troubleshooting 87 Check No 11 Refer to P 122 SiBE061121 AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Check the power supply voltage Voltage
75. OOR TEMPERATURE mur HEAT EXCHANGER THERMISTOR tte 7 0CUT FEEL i reall HEAT EXCHANGER HEHEHEH THERMISTOR MOTOR OPERATED EEE 4 8CuT oam 6 4CuT pin JUUNI Be T E 8 4 8CuT MUFFLER MUFFLER H WITH WITH Q FILTER FILTER 5 PROPELLER FAN X Q 3 S 2 SET MUFFLER ii WITH FILTER 2 G i G Sen S 3 8 tli FIELD PIPING O S a LIQUID SR 6 4CuT VALVE MUFFLER DISCHARGE PIPE THERMISTOR U Q 9 5CuUT 9 5CuT u FIELD PIPING 9 5CuT 8 ACCUMULATOR MUFFLER MUFFLER SEN OUTDOOR UNIT K 229 12 7CUT SiBE061121 REFRIGERANT FLOW COOLING HEATING 3D059586K 7 9CuT HEAT EXCHANGER OUTDOOR AIR TEMPERATURE i 7 9CuT THERMISTOR zs HE SOD 7 9CuT 7 9CuT CAPILLARY TUBE 1 7 9CUT OCuT 4 it Eend 7 9CUT Ne FILTER REFRIGERANT FLOW 6 4CUT_ en 7 9CUT a APILLAR Ray TUBES es s COOLING u a HEAT V HEATING EXCHANGER THERMISTOR CAPILLARY TUBE 4 MOTOR OPERATED PROPELLER FAN VALVE 12 7CUT 4H FILTER LN 12 7CuT LNY 9 5CuT Ys N RECEIVER 7 9CuT MUFFLER ON HEATING I I MUFFLER FIELD PIPING 7 9CuT 6 ACUT up 6 4 CuT MUFFLER 8 STOP VALVE EH d me 12 7CuT FIELD PIPING DISCHARGE PIPE Kg P lt 12 7 CUT THERMISTOR Hag GAS STOP VALVE COMPRESSOR WITH SERVICE PORT 3D051637U Appendix SiBE061121 2 Wiring Diagrams 2 1 Indoor Unit FVXG25 35 50K2V1B Wiring Diagrams
76. Press this button once to start operation e t selects the airflow rate setting Press once again to stop it T gt Page 15 RADIANT switching button Front cover e RADIANT operation e Open the front cover Model ARC466A2 Operation Manual 48 Operation Manual SiBE061121 E Open the front cover MODE selector button e t selects the operation mode AUTO DRY COOL HEAT FAN ECONO button e ECONO operation SWING button e Adjusting the airflow direction QUIET button e OUTDOOR UNIT QUIET operation Lamp brightness setting button Mode US Econo CS Swing Quiet Powerful Brightness POWERFUL button e POWERFUL operation WEEKLY button PROGRAM button OFF TIMER button Back BACK button Next TIMER CANCEL 1 i C NEXT button button e WEEKLY TIMER operation COPY button e t cancels the timer setting gt Page 19 20 e It cannot be used for the WEEKLY TIMER operation ON TIMER button SELECT button e It changes the ON OFF CLOCK button TIMER and WEEKLY TIMER settings EERENS 49 Operation Manual SiBE061121 Operation Manual 2 2 Preparation before Operation Preparation before Operation e 2e To set the batteries an Position and Bais Ze 7 Slide the front cover to take it off 2 Set two dry batteries AAA LRO3 alkaline 3 Set the front cover as before To fix the remote controlle
77. Procedure Ponts 1 Open the horizontal blade Horizontal blade R15068 2 Bend the horizontal blade and unfasten the center shaft O ZS ETET ot gt f En e Lele R15069 3 Unfasten the left shaft WISIN BNL CO UND WONO 1 SECM o OONN Eos ste VT Dias sue NON gt ener OUA DOMAN LIO E LITIN JJJ LOE R15070 4 Unfasten the right shaft and remove the horizontal blade Removal Procedure 148 Indoor Unit SiBE061121 1 6 Removal of Swing Motor Procedure AP Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work step Procedure Ponts Remove the 2 screws Kk a A H Dy Remove the swing motor Remove the shaft Unfasten the hook and disconnect the connector 149 Removal Procedure SiBE061121 Indoor Unit 1 7 Removal of Radiant Panel Procedure AP Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work ae procedure Poe o 1 Remove the screw 2 Unfasten the 2 hooks and remove the drip proof cover 3 Release the room temperature thermistor from the drip proof cover 4 Disconnect the connecting sections of the 2 pipings for the radiant panel Removal Procedure Ui IT HI KIN EN litt lg Wl UT IIT En mms ACS gm W N mum D e i Ei
78. R and ON TIMER in combination E To use OFF TIMER operation e Check that the clock is correct If not set the clock to the present time O 7 Press E Vi rrr D IT i Uab bad ba e 7 00 is displayed on the LCD e OFF blinks e and day of the week disappear from the LCD 2 Press until the time setting reaches the point you like e Each pressing of either button increases or decreases the time setting by 10 minutes Holding down either button changes the time setting rapidly Off 3 Press C_ again e OFF and setting time are displayed on the LCD e The OPERATION lamp blinks and the TIMER lamp lights yellow EED Display B To cancel OFF TIMER operation Cancel Press CT e OFF and setting time disappear from the LCD e and day of the week are displayed on the LCD E Notes on TIMER operation e When TIMER is set the present time is not displayed e Once you set ON OFF TIMER the time setting is kept in the memory The memory is canceled when remote controller batteries are replaced e When operating the unit via the ON OFF TIMER the actual length of operation may vary from the time entered by the user Maximum approximately 10 minutes B NIGHT SET mode e When the OFF TIMER is set the air conditioner automatically adjusts the temperature setting 0 5 C up in COOL 2 0 C down in HEAT to prevent excessive cooling heatin
79. Remove the 3 screws of the right side panel Remove the screw of the electrical box Procedure UAR Earth wires ST ei SiBE061121 Removal Procedure SiBE061121 Procedure Unfasten the hooks and remove the right side panel Outdoor Unit RXG50K2V1B m When reassembling insert the 2 hooks of the lower part and the hook of the upper back Disconnect the connectors of the front S40 S20 side S401 1920 AJS as R5273 S20 outdoor electronic expansion valve coil S40 overload protector S80 four way valve coil S90 S80 Disconnect the relay connector for the compressor Removal Procedure S90 thermistors 206 Outdoor Unit RXG50K2V1B SiBE061121 Step Procedure Points 10 Release the clamp of the compressor relay harness with pliers Compressor relay harness 11 Detach the clamp and release the thermistor lead wires from the hook 12 Remove the screw R12316 207 Removal Procedure SiBE061121 Step Outdoor Unit RXG50K2V1B
80. S procedure Points 17 Remove the cover thermal insulation ASSY small OT Cover thermal insulation ASSY small R15090 18 Remove the 8 screws and remove the cover thermal insulation ASSY large Cover thermal insulation ASSY large 19 Remove the 2 screws to remove the mounting plate right ll il 20 Remove the 2 screws to remove the mounting plate left Gl Mounting plate right Mounting plate left R15091 R15092 Removal Procedure 154 Indoor Unit 1 8 Removal of Air Outlet ASSY AP Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Procedure 155 Procedure Unfasten the hook and disconnect the relay connector for the swing motor Remove the 4 screws VAIN mm A MME Remove the air outlet ASSY Remove the 3 screws of the air outlet ASSY 8 R15097 SiBE061121 Preparation m Remove the horizontal blade according to the Removal of Horizontal Blade Removal Procedure SiBE061121 Indoor Unit ES Procedure Pens o 5 Turn over the air outlet ASSY and remove the 3 screws 6 Remove the sub air outlet ASSY 7 Remove the 3
81. SSS SS SS SS SSSES SSS A e Sy SE ET C KN AET Ed IN nek i nn R15318 166 Outdoor Unit RXG25 35K2V1B SiBE061121 2 Outdoor Unit RXG25 35K2V1B 2 1 Removal of Outer Panels Fan Motor Procedure AN Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work po Procedure Pints 1 ba EEN features d Take care not to cut your sm m N me finger by the fins of the ij outdoor heat exchanger Jl IN li S aiiis 2 prove the panels Remove the screw of the stop valve cover Pull down the stop valve cover and remove it s VAAR ssaki y H zr emm ef H HIII mm i jj OI SS HI m The stop valve cover is united with the shield plate m When reassembling make sure to fit the 5 hooks R13504 167 Removal Procedure SiBE061121 Outdoor Unit RXG25 35K2V1B ES Procedure Pens 2 Remove the 2 screws Top panel and lift the top panel R7190 3 Remove the drip proof Drip proof plate plate Ka J ANN AA Se ST aaa 4 Remove the 4 screws and remove the discharge grille Discharge grille R7192 m The discharge grille has 4 hooks i A Wu N WW Vu det Se i r m Removal Procedure 168 Outdoor Unit RXG25 35K2V1B Procedure Remove the 8 screws of the front panel Unfasten the hooks
82. TORT CONDITIONERS AND THE DEn cage ronment management RESIDENTIAL AIR CONDITIONING EQUIPMENT HEAT COMPONENTS INCLUDING M RECLAIM VENTILATION AIR CLEANING EQUIPMENT COMPRESSORS USED FOR THEM JMI 0107 COMPRESSORS AND VALVES VOAN DAIKIN INDUSTRIES LTD Dealer Head Office Umeda Center Bldg 2 4 12 Nakazaki Nishi Kita ku Osaka 530 8323 Japan Tokyo Office JR Shinagawa East Bldg 2 18 1 Konan Minato ku Tokyo 108 0075 Japan http www daikin com global_ac All rights reserved e Specifications designs and other content appearing in this brochure are current as of July 2011 but subject to change without notice S BE061121 I Printed in Japan 07 2011 B AK
83. The prohibited item or action is shown in the illustration or near the symbol amp This symbol indicates the action that must be taken or the instruction The instruction is shown in the illustration or near the symbol m After the repair work is complete be sure to conduct a test operation to ensure that the equipment operates normally and explain the cautions for operating the product to the customer 1 1 1 Cautions Regarding Safety of Workers Be sure to disconnect the 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 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 do not touch the discharged refrigerant gas The refrigerant gas may cause frostbite When disconnecting the suction or discharge pipe of the compressor at the welded section evacuate the refrigerant gas completely at a well ventilated place first If there is gas remaining inside the compressor the refrigerant gas or refrigerating machine oil discharges when the pipe is disconnected and it may Cause injury If the refrigerant gas leaks during the repair work ventilate the area The refrigerant gas may generate toxic gases when it contacts flames The step up ca
84. UT N A R15076 mn el wm Has SS er E DPT pre wu UU A 1 d Room temperature thermistor Clamp R15106 m When the pipings are disconnected protect the both openings from entering moisture i fag bp d IN AY R15078 150 Indoor Unit SiBE061121 step Procedure Points Remove the 2 lower CH screws on the right and left side of the radiant A panel am Au Si Ki AM Remove the 2 upper screws on the right and GC left side of the radiant panel Remove the radiant panel oo of R15081 Turn over the radiant panel R15082 Remove the 2 screws on the left E SI 10 Remove the left panel R15084 151 Removal Procedure SiBE061121 Indoor Unit Step Procedure 11 Remove the 2 screws on the right R15085 12 Remove the right panel R15086 13 Remove the screw m M4x 16 R15087 Removal Procedure 152 Indoor Unit SiBE061121 step Procedure Points 14 Remove the piping 15 Remove the screw VZ SNZ Cu Jm AA AS R15089 16 Remove the single union fixture Single union fixture R15129 153 Removal Procedure SiBE061121 Indoor Unit E
85. al of Compresso LEE 216 Part 8 Trial Operation and Field SettingS 219 Table of Contents EE eg Pump Down Opera sentent ne 220 Forced Cooling Riede AE 221 Trial ie en WEE 223 SI ek 224 4 1 When 2 Units are Installed in 1 Room nan enan enen e nennen 224 SiBE061121 4 2 Standby Electricity Gavinmng 225 4 3 Jumper and Switch Gettngs 225 5 Application of Silicon Grease to a Power Transistor and a DOGS BAE tinne deden themed 226 Pare 9 Append immens eten kennen ee a PNG DIAS zetten entente eee 228 T e Tele ie ie ln 228 12 ee ie En EE 229 AEL ao IA DIE Lo te ng EE 230 21 Magor UNE EE 230 22 ite eier RTE 231 V Table of Contents SiBE061121 Introduction 1 Introduction 1 1 Safety Cautions Cautions and m Be sure to read the following safety cautions before conducting repair work Warnings m The caution items are classified into N Warning and N Caution The N Warning items are especially important since they can lead to death or serious injury if they are not followed closely The AP Caution items can also lead to serious accidents under some conditions if they are not followed Therefore be sure to observe all the safety caution items described below m About the pictograms This symbol indicates the item for which caution must be exercised The pictogram shows the item to which attention must be paid This symbol indicates the prohibited action
86. ala Des ei akut 15525 151025 hee an Ka R3T R2T RIT LED a S2leeoso OUTDOOR DISCHARGE amp LI CONDENSER SW EWA outdoor Zic z5C E ennn en nnn EE nnn ern E X1M X2M TERMINAL STRIP MRM10 MRM20 L gt LIVE M1C COMPRESSOR MOTOR Y1E ELECTRONIC EXPANSION VALVE COIL MRC W MAGNETIC RELAY N NEUTRAL M1F FAN MOTOR V2 V3 V5 V6 V11 VARISTOR R1T R3T THERMISTOR SW1 FORCED OPERATION ON OFF SW SW1 Lup REACTOR SA2 SURGE ARRESTER S2 S102 CONNECTOR SW4 LOCAL SETTING SW SW4 QIL OVERLOAD PROTECTOR FU1 FU2 FU3 FUSE LEDA PILOT LAMP PM1 POWER MODULE AC1 AC2 PCB1 2 PRINTED CIRCUIT BOARD U V W X11A X12A Y1R REVERSING SOLENOID VALVE COIL E1 E2 SHEET METAL TERMINAL STRIP FIXED PLATE 3D056095E HR1 HR2 CONNECTOR 231 Appendix Daikin products are manufactured for export to numerous countries throughout the world Prior to purchase please confirm with your local authorised importer distributor and or retailer whether this product conforms to the applicable standards and is suitable for use in the region where the product will be used This statement does not purport to exclude restrict or modify the application of any local Warning legislation Ask a qualified installer or contractor to install this product Do not try to install the product yourself Improper installation can result in water or refrigerant leakage electrical shock fire or explosion Use only those parts and accessories s
87. as rated Correct the power supply Check the indoor unit outdoor unit connection wires YES Is there any wiring error Correct the indoor unit outdoor unit connection wires 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 Properly insulated Replace the connection wires o Before you check the LED A cancel a Wie indoor unit and NO the standby electricity saving EE function by operating fan operation Check the LED A on the outdoor with the remote controller unit PCB x Wait at least for 7 sec after turning on the power NO Is LED A blinking Diagnose the outdoor unit PCB YES Check No 11 Check the power supply waveform NO Is there any disturbance Replace the indoor unit PCB YES Locate the cause of the disturbance of the power supply waveform and correct it R15198 Service Diagnosis SiBE061121 Troubleshooting 4 8 Unspecified Voltage between Indoor Unit and Outdoor Unit Remote Controller Display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Troubleshooting Service Diagnosis re The supply power is detected for its requirements different from pair type and multi type models by the indoor outdoor transmission signal Pair type and multi type models are interconnected Wrong models interconnected Wrong wiring
88. ation 1 Remove the reacior the screw and gt m Remove the outer panels remove the reactor tim according to the Removal of Outer Panels Fan Motor m Remove the electrical box according to the Removal of Electrical Box 2 Remove the Te Remove the 2 screws LL TES TS a E o S 2273 Removal Procedure SiBE061121 Outdoor Unit RXG25 35K2V1B Step Procedure 2 The partition plate has m When reassembling fit the 2 hooks on the lower lower hooks into the bottom side Lift and pull the frame partition plate to i remove R13508 Removal Procedure 188 Outdoor Unit RXG25 35K2V1B SiBE061121 2 5 Removal of Sound Blankets Procedure ANY Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Step Procedure 1 Remove the sound m Since the piping ports are blanket top 7 torn easily remove the sound blanket carefully 2 Untie the string and open the sound blanket outer R11885 3 Lift and remove the sound blanket outer R11886 189 Removal Procedure SiBE061121 4 Pull the sound blanket inner out 5 Pull the sound blanket bottom out Removal Procedure P
89. ation To maximise the cooling heating effect the capacity of outdoor unit is increased and the airflow rate is fixed to the maximum setting The temperature and airflow settings are not variable e In DRY operation The temperature setting is lowered by 2 5 C and the airflow rate is slightly increased e In FAN operation The airflow rate is fixed to the maximum setting e In AUTO operation To maximise the cooling heating effect the capacity of outdoor unit is increased and the airflow rate is fixed to the maximum setting 57 Operation Manual SiBE061121 Operation Manual 2 8 OUTDOOR UNIT QUIET Operation ES OUTDOOR UNIT QUIET Operation OUTDOOR UNIT QUIET operation lowers the noise level of the outdoor unit by changing the frequency and fan speed on the outdoor unit This function is convenient during the night B To start OUTDOOR UNIT QUIET operation Quiet Press e ID is displayed on the LCD B To cancel OUTDOOR UNIT QUIET operation Cm Quiet Quiet KOHL CJ Press again e disappears from the LCD GE E a ek fy Example using the OUTDOOR UNIT QUIET operation during the night LLL K vk PLOT Le WAC AL 9 N e The noise level of the outdoor unit will be lower This is convenient when you need to consideration for your neighbourhood E Notes on OUTDOOR UNIT QUIET operation e This function is available in COOL HEAT and AUTO operation Th
90. ature adjusts the opening of the indoor electronic expansion valve to achieve the target panel Control temperature The panel temperature is categorized into stop dropping keep up and return zones The target panel temperature is 55 C at maximum but it may be lower depending on the condition Radiant panel temperature Stop zone 70 C Dropping zone 55 C Keep zone 53 C Up zone return zone from stop R14636 Operation stops the radiant panel temperature control is carried out Dropping zone The opening of indoor electronic expansion valve decreases The opening of indoor electronic expansion valve is kept Up zone The opening of indoor electronic expansion valve increases Return zone Starting operation control is carried out Operation Stop B In case operation stops during RADIANT operation including thermostat off Control In case any of the following events occur while the indoor electronic expansion valve is open the operation stop control makes the indoor electronic expansion valve close completely Operation ON OFF RADIANT 1 or RADIANT 2 is canceled Thermostat off Defrost control e 19 Function and Control SiBE061121 Main Functions 1 5 2 Indoor Unit Fan Control The movement of the indoor unit fan is different whether in RADIANT 1 or RADIANT 2 RADIANT 1 starts Room temperature Set temperature Note The only difference between Room temperature RADIANT 1 and RADIANT 2 i
91. c expansion valve coil x When the outdoor temperature is below the Replace the indoor electronic expansion valve coil Check No 01 Radiant panel thermistors Indoor heat exchanger thermistor Room temperature thermistor Does it conform to the thermistor characteristic chart YES Check the air passage Is there any short circuit NO Check the air filter Replace the thermistor Radiant panel thermistors Indoor heat exchanger thermistor Room temperature thermistor Provide sufficient air passage Clean the air filter NO Check the indoor heat exchanger Clean the indoor heat exchanger Change the refrigerant to remove moisture from the piping after drawing a vacuum Error repeats YES Replace the indoor unit PCB Error repeats Completed Completed Replace the indoor heat exchanger R14647 84 Troubleshooting SiBE061121 4 6 Thermistor or Related Abnormality Indoor Unit D Ny CU Remote Li Controller Display gt gt WI em gt an RI md A Method of The temperatures detected by the thermistors determine thermistor errors Malfunction Detection Malfunction The thermistor input is more than 4 96 V or less than 0 04 V during compressor operation Decision Conditions Supposed m Disconnection of connector Causes m Defective thermistor m Defective indoor unit PCB Troubleshooting A
92. calculated by the radiant panel thermistors is above Conditions 70 C Indoor electronic expansion valve abnormality m During cooling or dry operation the temperature detected by the radiant panel thermistor 6 4 has dropped m During heating operation the temperature detected by the radiant panel thermistor 4 has risen m During RADIANT operation the temperature detected by the radiant panel thermistor o 4 does not rise Freeze up protection control During cooling operation the operation stops when the temperature detected by the radiant panel thermistor dh 4 has dropped Supposed Clogged air filter of the indoor unit Causes Dust accumulation on the indoor heat exchanger Short circuited air Defective radiant panel thermistor s Defective indoor heat exchanger thermistor Defective room temperature thermistor Defective indoor electronic expansion valve or coil 83 Service Diagnosis SiBE061121 Troubleshooting Check No 01 Refer to P 121 Check No 12 Refer to P 123 Service Diagnosis Troubleshooting AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged lower limit for cooling operation 10 C the Check the operation condition freeze up protection control is activated and the cooling operation stops NO en Condition OK Start operation within the specified range of the outdoor temperature YES Check No 12 Check the indoor electroni
93. de Hierarchy Outline There are 3 modes the one is the normal operation mode and the others are the forced operation mode and the power transistor test mode for installation and servicing Detail Air conditioner control mode Forced operation mode Forced cooling operation Power transistor test mode Normal operation mode Fan Cooling includes drying Heating Heating Defrosting Stop indoor unit OFF Preheating operation Discharging from capacitor Stop R14248 D Note Unless specified otherwise a dry operation command is regarded as cooling operation and a radiant operation command is regarded as heating operation Function and Control 30 Control Specification SiBE061121 3 2 Frequency Control Outline Frequency is determined according to the difference between the room thermistor temperature and the target temperature The function is explained as follows 1 Zi 3 How to determine frequency Frequency command from the indoor unit Difference between the room thermistor temperature and the target temperature Frequency initial setting PI control When the shift of the frequency is less than zero AF lt O by PI control the target frequency is used as the command frequency Dropping function Input current control etc Upper limit frequency Upper limit function FMAX lt Compressor protection function Command frequency Limit frequency Skip control Target frequency Lower limit fre
94. diend CE mee An output overcurrent is detected by checking the current that flows in the inverter DC section m A position signal error occurs while the compressor is running m A speed error occurs while the compressor is running WR An output overcurrent signal is fed from the output overcurrent detection circuit to the microcomputer m If the error repeats the system is shut down m Reset condition Continuous run for about 11 minutes 50 class 5 minutes without any other error Poor installation condition Closed stop valve Defective power module Wrong internal wiring Abnormal power supply voltage Defective outdoor unit PCB Defective compressor Service Diagnosis SiBE061121 Troubleshooting Check No 15 Refer to P 125 Check No 17 Refer to P 128 Check No 18 Refer to P 128 Check No 22 Refer to P 130 Service Diagnosis Troubleshooting AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged An output overcurrent may result from wrong internal wiring If the system is interrupted by an output overcurrent after the wires have been disconnected and reconnected for part replacement check the wiring again Check No 17 Check the installation condition Stop valve fully open Fully open the stop valve Turn off the power and turn it on again to start the system See if the same error Occurs NOT Monitor the power supply volta
95. e Horizontal Auto Swing Right and Left Wony Free Auto Restart after Power Failure abanw ES SetrDiagnosis Digital LED Display e Comon auio FanSpee leje ie Control Indoor Unit Quiet Operation e e Anti ae Treatment of Outdoor ro a NIGHT QUIET Mode Automat _ Heat Exchanger OUTDOOR UNIT Suey EET Multi Split Split Type Compatible Manual Indoor Unit e Flexibility mM za OX VIA E SE SE GC OI za D SE 8 SS SE CS FVXG50K2V1B RXG50K2V1B IES B RXG50K2V1B INTELLIGENT EYE Operation SES H P C O Compatible Indoor Unit ale Quick Warming Function Preheating Flexible Power Supply Correspondence Operation Chargeless Hot Start Function HK Automatic Defrosting KEN Either Side Drain Right or Left a Power Selection pF Operation Automatic Operation Pare 5 Room Centralized Controller Option je RADIANT Operation RADIANT Operation e Remote Remote Control Adaptor Normal Open Pulse Contact Option Program Dry Operation E Control Remote Control Adaptor Normal Open Contact Option Fan Only sire Lifestyle New POWERFUL Operation Convenience Non Inverter Inverter POWERFUL Operation Ii DII NET Compatible Adaptor Priority Room Setting Ge EE GC Wireless LEE HOME LEAVE Operation ITT Wired Option eise ECONO Operation ele ee E Indoor Unit ON OFF Button S oo Signal Receiving Sig
96. e note that the latching sound varies depending on the valve type 123 Service Diagnosis SiBE061121 Check 5 5 Four Way Valve Performance Check Check No 13 Turn off the power and turn it on again x Four way valve coil Start heating operation Cooling Dry No continuity Heating Continuity S80 voltage at 220 240 VAC with compressor on Fig 1 NO Replace the outdoor unit PCB YES Disconnect the four way valve coil from the connector and check the continuity Four way NO valve coil resistance at Reol the f 1000 2000 Q T ace the four way valve YES Replace the four way valve R11903 Fig 1 Voltage at S80 220 240 VAC Time Compressor SR R11904 5 6 Inverter Unit Refrigerant System Check Check No 14 Refrigerant system check Is the discharge pipe thermistor disconnected from the holder Place the thermistor Check for refrigerant leakage See the service diagnosis on refrigerant shortage 411 Replace the refrigerant R8259 Service Diagnosis 124 Check SiBE061121 5 7 Inverter Checker Check Check No 15 m Characteristics If an abnormal stop occurs due to compressor startup failure or overcurrent output when using inverter unit it is difficult to judge whether it is caused by the compressor failure or other failure control PCB power module etc The inverter checker makes it possible to judge the cause of
97. e power and turn it on WARNING Refer to P 128 again 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 Check No 19 Refer to P 129 Error again or outdoor fan activated Check the radiation fin temperature N Above A C YES Replace the outdoor unit PCB Check No 19 Check the outdoor fan or related NG Replace the fan motor Correct the connectors and fan motor lead wire Replace the outdoor unit PCB Too dirty Radiation fin dirty Clean up the radiation fin Slightly dirty Check No 17 Check the installation condition R14444 es o 50 class Service Diagnosis 110 Troubleshooting SiBE061121 4 23 Radiation Fin Temperature Rise Remote Controller Display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes 111 A radiation fin temperature rise is detected by checking the radiation fin thermistor with the compressor on If the radiation fin temperature with the compressor on is above A C The error is cleared when the radiation fin temperature drops below B C lf the error repeats the system is shut down Reset condition Continuous run for about 60 minutes without any other error assess oe 7e Defective outdoor fan motor Short circuit Defective radiation fin thermistor Disconnection of connector
98. e silicon grease evenly to the whole m Do not leave any foreign object such as solder or paper waste between the power transistor and the radiation fin and also the diode bridge and the radiation fin Tighten the screws of the power transistor and the diode bridge and contact to the radiation fin without any gap lt Example gt The shape of electrical box and PCB vary depending on the model Take out a PCB Power transistor Diode bridge TRM TPM IGBT IPM SPM etc Diode bridge Rectifier stack etc Not applied Paper waste OK Evenly applied NG Not evenly NG Foreign object silicon grease applied R9056 Trial Operation and Field Settings 226 227 SiBE061121 Part 9 Appendix he PNG RI el EE 228 ti Vo lele leie Nu EE 228 12 Odeon En EE 229 2 WNO DilagraMS EE 230 Sch EE EE verstane A steel 230 22 OUr H e EE 231 Appendix SiBE061121 1 Piping Diagrams 1 1 Indoor Unit FVXG25 35K2V1B FIELD PIPING 6 4CuT FIELD PIPING 9 5CuT Appendix INDOOR UNIT CROSS FLOW FAN FAN MOTOR REFRIGERANT FLOW COOLING HEATING 4D071597 Piping Diagrams FVXG50K2V1B INDOOR UNIT ICROSS FLOW FAN evo PING f 6 4CuT FAN MOTOR FIELD PIPING 12 7CuT 9 5CuT _I REFRIGERANT FLOW COOLING gt HEATING 4D071598 228 Piping Diagrams 1 2 Outdoor Unit RXG25 35K2V1B 9 5CuT RXG50K2V1B OUTDOOR UNIT OUTD
99. ear from the LCD e The TIMER lamp goes off Weekly e To reactivate the WEEKLY TIMER operation Dress again W eekly e If a reservation deactivated with e activated once again the last reservation mode will be used CAUTION Weekly e H not all the reservation settings are reflected deactivate the WEEKLY TIMER operation once Then press again to reactivate the WEEKLY TIMER operation 25 Operation Manual 66 Operation Manual SiBE061121 B To delete reservations The individual reservation 7 fress ote E e The day of the week and the reservation number will be displayed p A 2 Press to select the day of the week and the reservation number to be deleted 3 Press D SG and ON or OFF blink A 4 Press and select blank e Pressing changes ON OFF TIMER mode Pressing A alternates the following items appearing on the LCD in rotational sequence e The reservation will be no setting with selecting blank JON B Jee mb ONTIMER OFF TIMER blank 5 Press D e The selected reservation will be deleted 6 Press e f there are still other reservations WEEKLY TIMER operation will be activated The reservations for each day of the week e This function can be used for deleting reservations for each day of the week e It can be used while confirming or setting reservations 1 Press to select the day of the week to be
100. ector for the main PCB S27 Remove the service S27 for main PCB PCB R15046 4 D the terminal board D a 1 Remove the screw 2 Unfasten the hook with a flat screwdriver 141 Removal Procedure SiBE061121 Step Procedure Ss i Release the terminal board ASSY Unfasten the hook Remove the terminal board cover Terminal board Ree emt Release the harnesses from the hook Removal Procedure Indoor Unit Indoor Unit SiBE061121 ae procedure Points 7 Cut the clamp E Sc E ME AAA fA ifs KA CS D R15051 8 Unfasten the 2 hooks of Upper brown fan motor each connector Pull Lower red electronic out the 2 relay expansion valve connectors Cy 9 Release the 4 terminals with a flat screwdriver 10 Remove the terminal board ASSY D R15134 143 Removal Procedure SiBE061121 Indoor Unit se Preedwe LL Ponte 5 Remove the display PCB Gene m Use a piece of cloth to 1 Remove the screw protect the surface of the cover right with a flat indoor unit screwdriver R15055 Ka HD R15056 2 Remove the 2
101. edure 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 Sund A 202 Outdoor Unit RXG50K2V1B Procedure Release the fan motor lead wire from the 2 hooks and pull the fan motor out Fan motor lead wire a SiBE061121 m 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 Removal Procedure SiBE061121 Outdoor Unit RXG50K2V1B 3 3 Removal of Electrical Box Procedure AN Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work ae procedure Points 1 Remove the 2 screws Preparation of the shield plate m Remove the top panel and the front panel according to the Removal of Outer Panels 2 Slide the shield plate upward to unfasten the hook on the bottom left and then remove the shield plate R5267 3 Disconnect the 2 power supply cables and the earth wire Removal Procedure 204 Outdoor Unit RXG50K2V1B Disconnect the 2 earth wires
102. enen enen eerenenen ennen eeens 101 4 19 DC Voltage Current Sensor Abnormality 25 35 Class 104 4 20 CT or Related Abnormality 50 Class 105 4 21 Thermistor or Related Abnormality Outdoor Unit 107 4 22 Electrical Box Temperature RIS ccccccccecccecceeeceeeeceeseseceeeseeeeas 109 4 23 Radiation Fin Temperature Rise n nnannennnnnnnnnnnnnnenenennrsnrrrenrrnrrnreennne 111 4 24 Output Overcurrent Detection ccccccccceececeeeeeseseeceeeeeeeeeeseeesseeeesaes 113 4 25 Remgerant Shortage EE 115 4 26 Low voltage Detection or Over voltage Detection 118 4 27 Signal Transmission Error on Outdoor Unit PCB 50 Class Only 120 E Ee 121 5 1 Thermistor Resistance Check 121 Table of Contents SiBE061121 5 2 Fan Motor Connector Check 122 5 3 Power Supply Waveforms Check 122 5 4 Electronic Expansion Valve Coil Check 123 5 5 Four Way Valve Performance Check 124 5 6 Inverter Unit Refrigerant System Check 124 5 7 Inverter Checker Check 125 5 8 Rotation Pulse Check on the Outdoor Unit PCB ees 127 5 9 Installation Condition Check 128 5 10 Discharge Pressure eeh eegenen enee ee 128 5 11 Outdoor Fan System Check 129 5 12 Main Circuit e ele e 129 5 13 Capacitor Voltage EE 130 5 14 Power Module Check 130 Part 7 Removal Procedure nnnannannnnnnnsnnsnnnnnnnnnnsensnnennsnnsnsnsenn TOA 1 2
103. ep Procedure 1 Remove the 3 screws 7 TE R15121 Removal Procedure 162 Indoor Unit SiBE061121 step Procedure Points Remove the cover ASSY Cover ASSY Release the harnesses for the electronic expansion valve coil from the hook upper Release the harnesses for the electronic expansion valve coil from the hook lower Remove the screw R15125 163 Removal Procedure SiBE061121 Unfasten the 2 hooks and remove the cover Release the harnesses for the electronic expansion valve coil from the hooks Remove the 3 screws Unfasten the hook Removal Procedure Procedure N i A 7 A R15146
104. eplace the fan generated motor Replace the indoor unit PCB R14964 82 Troubleshooting SiBE061121 4 5 Radiant Panel Temperature Rise Indoor Electronic Expansion Valve Motor Operated Valve Abnormality Freeze up Protection Control el iD v a Remote 2 Controller Display Method of Radiant panel temperature rise Malfunction During RADIANT operation high temperature control e g operation halt indoor electronic Detection expansion valve closure is activated according to the temperature detected by the radiant panel thermistors Indoor electronic expansion valve abnormality The indoor electronic expansion valve is required to be fully closed during cooling dry or heating operation When the indoor electronic expansion valve is open due to malfunction the refrigerant flows into the radiant panel and the radiant panel temperature rises or drops The indoor electronic expansion valve is required to be open during RADIANT operation When the indoor electronic expansion valve is closed due to malfunction the refrigerant does not flow into the radiant panel and the radiant panel temperature does not rise Operation stops when any of these cases is detected by the system Freeze up protection control The temperature detected by the radiant panel thermistors is used to prevent the indoor unit from freezing during cooling operation Malfunction Radiant panel temperature rise Decision The radiant panel surface temperature
105. f Thermistor 1 Outdoor Heat Exchanger Thermistor 2 Discharge Pipe Thermistor 3 Indoor Heat Exchanger Thermistor 4 Radiant Panel Thermistors 29 Outdoor electronic expansion valve Indoor electronic expansion valve Motor operated valve Radiant panel Four way valve G Compressor R14640 The outdoor heat exchanger thermistor is used for controlling target discharge pipe temperature The system sets the target discharge pipe temperature according to the outdoor and indoor heat exchanger temperature and controls the outdoor electronic expansion valve opening so that the target discharge pipe temperature can be obtained In cooling operation the outdoor heat exchanger thermistor is used for detecting disconnection of the discharge pipe thermistor When the discharge pipe temperature becomes lower than the outdoor heat exchanger temperature the discharge pipe thermistor is judged as disconnected In cooling operation the outdoor heat exchanger thermistor is used for high pressure protection The discharge pipe thermistor is used for controlling discharge pipe temperature If the discharge pipe temperature used in place of the inner temperature of the compressor rises abnormally the operating frequency becomes lower or the operation halts The discharge pipe thermistor is used for detecting disconnection of the discharge pipe thermistor The indoor heat exchanger the
106. ference between suction and discharge temperature is smaller than the specified value it is regarded as refrigerant shortage Refer to page 115 for detail 43 Function and Control SiBE061121 Operation Manual Part 5 Operation Manual Ts SYSTEM COMMOULAUON eener tee bed 45 2 Operation Mantels neeh neee 46 Zell Names Ole alts EE 46 2 2 Preparation before Operation 50 2 3 AUTO DRY COOL HEAT FAN Operation 52 24 RADIANT OperatiOM ierse eegene eege 53 2 5 Temperature Selinde ereteken bellona 54 2 6 Adjusting the Airflow Direction and Rate ccccccccsseeeceseeceeeeeneeeeneees 55 27 POWERFULCODSFAUOM EE 57 2 8 OUTDOOR UNIT QUIET Operation 58 29 ECONO Operation rimore desnehadhtant seen ieends 59 210 OFF HUESEN 60 2 TON TIMER OPpSfAUOR EE 61 212 WEEKLY TIMER Operation EE 62 2 ANS QUICK REISE CS arne 68 44 System Configuration SiBE061121 1 System Configuration After installation and trial operation of the room air conditioner are completed the air conditioner should be handled and operated as described in the following pages Every user should be informed on the correct method of operation and how to check if it can cool or heat well and how to use it efficiently Providing instructions to the user can reduce requests for servicing by 80 However proficient the installation and operating functions of the air conditioning system are the customer may fault either the room air conditione
107. g for your pleasant sleep Operation Manual 60 Operation Manual SiBE061121 2 11 ON TIMER Operation EI ON TIMER Operation B To use ON TIMER operation e Check that the clock is correct If not set the clock to the present time 7 Press Ges e GOD is displayed on the LCD Jon 6 29 e ON blinks e and day of the week disappear from the LCD A 2 Press until the time setting reaches the point you like e Each pressing of either button increases or decreases the time setting by 10 minutes Holding down either button changes the time setting rapidly On 3 Press again e ON and setting time are displayed on the LCD e The OPERATION lamp blinks and the TIMER lamp lights yellow GHB _ a Display B To cancel ON TIMER operation Cancel Press CT e ON and setting time disappear from the LCD e and day of the week are displayed on the LCD To combine ON TIMER and OFF TIMER e A sample setting for combining the 2 timers is shown below Example Present time 23 00 The unit operating OFF TIMER at 0 00 ON TIMER at 14 00 Combined E In the following cases set the timer again e After a breaker has turned off e After a power failure e After replacing batteries in the remote controller 61 Operation Manual SiBE061121 Operation Manual 2 12 WEEKLY TIMER O
108. ge Error again discharge and suction pressures and other factors for a long term YES Possible causes x Momentary fall of power supply voltage Keep on using as it is Compressor overload x Short circuit Check the connectors and other components Turn off the power and disconnect the harnesses U V and W Check No 15 j Inverter checker Check with the inverter checker Part No 1225477 Correct the power supply or replace the outdoor unit PCB NO Check No 22 Check the power module NO Replace the outdoor unit PCB Turn off the power and reconnect the harnesses Turn on the power again and start operation Check the power supply voltage NO Voltage as rated Correct the power supply YES Short circuit or YES wire breakage between compressor s coil phases NO Check No 18 Check the discharge pressure Replace the compressor R14446 114 Troubleshooting SiBE061121 4 25 Refrigerant Shortage A d Remote Lu Controller Display Method of Refrigerant shortage detection I Malfunction Refrigerant shortage is detected by checking the input current value and the compressor Detection running frequency If the refrigerant is short the input current is lower than the normal value Refrigerant shortage detection Il Refrigerant shortage is detected by checking the discharge pipe temperature and the opening of the outdoor electronic expansio
109. harge pipe temperature 6 C lt outdoor heat exchanger temperature 2 When the operation mode is heating When the following condition is fulfilled the discharge pipe thermistor disconnection is ascertained Discharge pipe temperature 6 C lt indoor heat exchanger temperature A seconds B seconds 120 C seconds Adjustment when the thermistor is disconnected When the disconnection is ascertained the compressor continues operation for 9 minutes and then stops When the compressor stops repeatedly the system is shut down 3 11 8 Target Discharge Pipe Temperature Control Function and Control The target discharge pipe temperature is obtained from the indoor and outdoor heat exchanger temperature and the outdoor electronic expansion valve opening is adjusted so that the actual discharge pipe temperature becomes close to the target discharge pipe temperature Indirect SH superheating control using the discharge pipe temperature The target discharge pipe temperature is set as to become the SC HEES aiming SH a The inclination does not change depending on the operating condition SH Superheat Era The outdoor electronic expansion valve opening and the target discharge pipe temperature are adjusted every 20 seconds The target discharge pipe temperature is controlled by indoor heat exchanger temperature and outdoor heat exchanger temperature The opening degree of the outdoor electronic expansion valve
110. he OPERATION lamp e 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 e To continue copying the settings to other days of the week repeat step 4 and step 5 g 6 Dress to complete the setting e is displayed on the LCD and WEEKLY TIMER operation is activated m Note on copy mode e The entire reservation of the source day of the week is copied in the copy mode In the case of making a reservation change for any day of the week individually after copying the content of weekly reservations press ___ and change the settings in the steps of setting mode Operation Manual SiBE061121 Operation Manual WEEKLY TIMER Operation e The reservation can be confirmed Setting Displays trams ON 508 ech TUE MH 650 15 30 d l Normal Confirmation 1 Press 5 e The day of the week and the reservation number of the current day will be displayed 2 Press to select the day of the week and the reservation number to be confirmed e Pressing displays the reservation details To change the confirmed reserved settings select the reservation number and press ext The mode is switched to setting mode Go to setting mode step 2 E 3 Press to exit confirming mode B To deactivate WEEKLY TIMER operation Weekly Press CJ while is displayed on the LCD e The CME will disapp
111. he function m ECONO operation is available when the unit is in AUTO COOL DRY or HEAT operation and not available in RADIANT or FAN operation m ECONO operation and POWERFUL operation cannot be used at the same time The latest command has the priority T geet Maximum during normal operation Power consumption and current Normal Po ege eer Maximum during ECONO operation ECONO Operation Time R9288 Function and Control SiBE061121 Main Functions 1 11 Inverter POWERFUL Operation Outline Detail D Note Function and Control In order to exploit the cooling and heating capacity to full extent operate the air conditioner by increasing the indoor fan rotating speed and the compressor frequency When the POWERFUL button is pressed the fan speed and target temperature are converted to the following states for 20 minutes COOL H tap A rpm DRY Dry rotating speed A rom Lowered by 2 5 C DRY UTO A Same as cooling heating in The target temperature is POWERFUL operation kept unchanged A 50 rpm Ex POWERFUL operation in cooling It should be the lower limit of cooling temperature 18 C POWERFUL It counts 20 minutes alsoj O in the remote controller N POWERFUL Ending condition or in 1 to 3 1 After the lapse of 20 minutes 2 Operation OFF 20 minutes 3 POWERFUL operation is OFF R13571 POWERFUL operation is only available in RADIANT 1 RADI
112. heaters stoves and ranges When relocating the equipment make sure that the new installation site has sufficient strength to withstand the weight of the equipment If the installation site does not have sufficient strength and if the installation work is not conducted securely the equipment may fall and cause injury Introduction SiBE061121 Check to make sure that the power cable plug is not dirty or loose then insert the plug into a power outlet securely If the plug has dust or loose connection it may cause an electrical shock or fire Be sure to install the product correctly by using the provided standard For unitary type installation frame only Incorrect use of the installation frame and improper installation may cause the equipment to fall resulting in injury Be sure to install the product securely in the installation frame mounted on the For unitary type window frame If the unit is not securely mounted it may fall and cause injury When replacing the coin battery in the remote controller be sure to dispose of the old battery to prevent children from swallowing it If a child swallows the coin battery see a doctor immediately 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
113. her parts that are heated by the gas brazing machine AP Warning If the refrigerant gas leaks during work ventilate the room If the refrigerant gas is exposed to flames toxic gas may be generated AP Warning Since it may happen that the Compressor refrigerant oil in the R11889 compressor catches fire prepare wet cloth so as to extinguish fire immediately m Before working make sure that the refrigerant AP Caution gas is empty in the circuit From the viewpoint of global Be sure to apply nitrogen environment protection do replacement when not discharge the refrigerant heating up the brazed gas in the atmosphere Make d sure to collect all the Heat up the brazed part refrigerant gas of the discharge side G and disconnect A A 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 R12031 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 Discharge side In case of difficulty with gas brazing machine 1 Disconnect the brazed part where is easy to disconnect and restore Cut pipes on the main unit with a tube cuiter in order to make it easy to disconnect Removal Procedure 194 Outdoor Unit RXG25 35K2V1B Procedure Heat up the brazed part
114. hout compressor running YES Replace the compressor NO System shut down after errors repeated several times NO Check the outdoor electronic expansion valve coil Replace it as required YES Replace the compressor R14439 92 Troubleshooting SiBE061121 4 12 DC Fan Lock Remote Controller Display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Troubleshooting Check No 16 Refer to P 127 93 gt gt Rm An error is determined with the high voltage fan motor rotation speed detected by the Hall IC m The fan does not start in 15 30 seconds depending on the model even when the fan motor is running m If the error repeats the system is shut down Reset condition Continuous run for about 11 minutes 50 class 5 minutes without any other error Disconnection of the fan motor Foreign matters stuck in the fan Defective fan motor Defective outdoor unit PCB AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Fan motor connector disconnected Turn off the power and reconnect the connector Foreign matters in or around the fan Remove them Turn on the power Rotate the fan Fan rotates smoothly Replace the outdoor fan motor Check No 16 Check the rotation pulse input on the outdoor unit PCB Pulse
115. ied amount of fresh refrigerant Refrigerant shortage error again Check No 01 Check the thermistors Replace the defective one s Replace the outdoor unit PCB Error again Replace the compressor Completed Completed R15311 117 Service Diagnosis SiBE061121 Troubleshooting 4 26 Low voltage Detection or Over voltage Detection Remote Controller Display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Service Diagnosis gt IZ L G Indoor Unit Evaluation of zero cross detection of power supply by the indoor unit PCB Outdoor Unit Low voltage detection An abnormal voltage drop is detected by the DC voltage detection circuit Over voltage detection An abnormal voltage rise is detected by the over voltage detection circuit Indoor Unit There is no zero cross detection in approximately 10 seconds Outdoor Unit Low voltage detection m The voltage detected by the DC voltage detection circuit is below 150 180 V depending on the model Over voltage detection m An over voltage signal is fed from the over voltage detection circuit to the microcomputer The voltage is over 400 V m If the error repeats the system is shut down m Reset condition Continuous run for about 11 minutes 50 class 5 minutes without any other error Power supply voltage is not as specified Defective DC voltage detection circuit
116. ing Start Up anas enenn ennen en veneneen 33 3 4 Discharge Pipe Temperature Control aaneen ennen eneen eneen 35 so Input Garrent EE Eet 36 3 6 Freeze up Protection Control aanne eneen enen een venen venen venen vens 37 3 7 Heating Peak Cur GONWOl ereronde en 37 3e Outdoor Fan GONWO EE 38 3 9 Liquid Compression Protection Function an aaneen erven eren enen 38 3 10 Defrost Qontrol EE 39 3 11 Outdoor Electronic Expansion Valve Control eneen eeen 40 SAC MER 43 14 Main Functions SiBE061121 1 Main Functions 1 1 Temperature Control Definitions of Temperatures Temperature Control The definitions of temperatures are classified as following Room temperature temperature of lower part of the room Set temperature temperature set by remote controller Room thermistor temperature temperature detected by room temperature thermistor Target temperature temperature determined by microcomputer Target temperature Room thermistor temperature a Set temperature Room temperature R12321 The illustration is for wall mounted type as representative The temperature of the room is detected by the room temperature thermistor However there is difference between the temperature detected by room temperature thermistor and the temperature of lower part of the room depending on the type of the indoor unit or installation condition Practically the temperature control is done by
117. ing is not variable temperature E Operating conditions E Recommended temperature setting e For cooling 26 28 C e For heating 20 24 C B Tips for saving energy e Be careful not to cool heat the room too much Keeping the temperature setting at a moderate level helps save energy e Cover windows with a blind or a curtain Blocking sunlight and air from outdoors increases the cooling heating effect e Clogged air filters cause inefficient operation and waste energy Clean them once in about every 2 weeks E Notes on the operating conditions e The outdoor unit consumes some power to have its electric components work even while it is not operating Connecting outdoor unit RXG25 35 1 15W Other outdoor units 15 20W The outdoor unit consumes 40 to 55W of power at the time of compressor preheating e If you are not going to use the air conditioner for a long period for example in spring or autumn turn the breaker off e Use the air conditioner in the following conditions Operating conditions If operation is continued out of this range Outdoor temperature lt 2 3 4 5MXS gt 10 46 C e A safety device may work to stop the operation lt RXG gt 10 46 C In multi system it may work to stop the operation of the out Indoor temperature 18 32 C door unit only Indoor humidity 80 max e Condensation may occur on the indoor unit and drip Outdoor temperature lt 2MXS gt 10 24 C e A safety device
118. is is not available in RADIANT FAN and DRY operation e 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 e Even the operation is stopped using the remote controller or the indoor unit ON OFF switch when using OUTDOOR UNIT QUIET operation CEO will remain on the remote controller display e OUTDOOR UNIT QUIET operation will drop neither the frequency nor fan speed if they have been already dropped low enough Operation Manual 58 Operation Manual SiBE061121 2 9 ECONO Operation Lal ECONO Operation ECONO operation is a function which enables efficient operation by limiting the maximum power consumption value This function is useful for cases in which attention should be paid to ensure a circuit breaker will not trip when the product runs alongside other appliances B To start ECONO operation Press during operation e N is displayed on the LCD B To cancel ECONO operation Press again e Ak disappears from the LCD Example Normal operation ECONO operation In case the air conditioner and other The maximum power consumption of the air appliances which require high power conditioner is limited by using ECONO consumption are used at same time a circuit operation breaker may trip if the air conditioner operate The circuit breaker will hardly trip even if the
119. l 62 Operation Manual 63 SiBE061121 mTo use WEEKLY TIMER operation Setting mode e Make sure the day of the week and time are set If not set the day of the week and time Program 1 Program 2 leben 3 Program 4 ON OFF OFF LTE a Monday 25 C NE 27 C D SS D ar 6 00 8 30 17 30 22 00 Setting Displays JON MON i Al pat Day and number ON OFF i Temperature Press CJ e The day of the week and the reservation number of the current day will be displayed e 1 to 4 settings can be made per day A 2 Press to select the desired day of the week and sake number e Pressing changes the reservation number and the day of the week 3 Press a e The day of the week and reservation number will be set e and ON blink A 4 Press to select the desired mode e Pressing changes ON or OFF setting in sequence Pressing A alternates the following items appearing on the LCD in rotational sequence JON IS IS kend kend ON TIMER OFF TIMER blank e In case the reservation has already been set selecting blank deletes the reservation e Go to step 9 if blank is selected e To return to the day of the week and reservation number setting press 5 Press Ges B e The ON OFF TIMER mode will be set e and the time blink 22 Operation Manual SiBE061121 Operation Manual 97 WEEKLY TIMER Operation A Select D D
120. l adjustment of these functions is unavailable e In AUTO operation the system selects an appropriate operation mode COOL or HEAT based on the room and outside temperatures and starts the operation e The system automatically reselects setting at a regular interval to bring the room temperature to user setting level e This mode is valid for fan only Operation Manual 52 53 Operation Manual 2 4 RADIANT Operation RADIANT Operation The RADIANT operation provides a comfortable environment with quiet and currentless heating operation in addition to the HEAT operation mode The RADIANT operation has 2 operation modes B To start RADIANT operation 7 Press and select an HEAT operation e Each pressing of the button advances the mode setting in sequence LI ze z0 Radiant AUTO DRY COOL HEAT FAN e 3 is displayed on the LCD 2 Press and select a RADIANT operation e S is displayed on the LCD e The RADIANT lamp lights red e This button can be used only in the HEAT operation mode RADIANT2 Display RADIANT operation Gentle breeze m RADIANTI m RADIANT2 e Use this operation to prioritize quiet and currentless heating operation or when the noise from RADIANT1 operation bothers you The gentle breeze operation starts from the beginning e Use this operation when the difference between the set temperature and indoor temperatu
121. lectronic expansion valve control for defrosting 4 Outdoor electronic expansion valve control when the discharge pipe temperature is abnormally high 5 Outdoor electronic expansion valve control when the discharge pipe thermistor is disconnected Feedback Control 1 Target discharge pipe temperature control The followings are the examples of control which function in each operation mode by the outdoor electronic expansion valve control Holding Functions No Functions When the frequency changes under target discharge When the power turns on or when the compressor When the frequency changes under starting control During target discharge pipe temperature control pipe temperature control When the frequency changes under the control for disconnection of the discharge pipe thermistor When the disconnection of the discharge pipe When the operation starts thermistor is ascertained Under defrost control Starting control Control when the frequency changes Target discharge pipe temperature control Control for disconnection of the discharge pipe thermistor High discharge pipe temperature control Pressure equalizing control Opening limit control Starting control Control when the frequency changes Target discharge pipe temperature control Control for disconnection of the discharge pipe thermistor High discharge pipe temperature cont
122. liance to somewhere else or consult the service shop Operation Manual 50 Operation Manual SiBE061121 51 B Turn the breaker on e After the power is turned on the flap of the indoor unit opens and closes once to set the reference position To set the clock e DOD is displayed on the LCD e MON and blink CR mmm e blinks i m d Press to set the clock to the present time v e Holding down A or V rapidly increases or decreases the time display 5 Press e Point the remote controller at the indoor unit when pressing the buttons e blinks B Note on setting the clock e H the indoor unit s internal clock is not set to the correct time the ON TIMER OFF TIMER and WEEKLY TIMER will not operate punctually Operation Manual SiBE061121 Operation Manual 2 3 AUTO DRY COOL HEAT FAN Operation AUTO DRY COOL HEAT FAN Operation The air conditioner operates with the operation mode of your choice From the next time on the air conditioner will operate with the same operation mode B To start operation 1 Press and select an operation mode e Each pressing of the button advances the mode setting in sequence A N gt gt gt AUTO DRY COOL HEAT FAN e KII is displayed on the LCD e The OPERATION lamp lights green
123. lit uniformly check the power module Refer to Check No 22 3 If NG in Check No 22 replace the power module PCB If OK in Check No 22 check if there is any solder cracking on the PCB 4 If any solder cracking is found replace the PCB or repair the soldered section If there is no solder cracking replace the PCB Caution 1 When the output frequency is low the LEDs blink slowly As the output frequency increases the LEDs blink quicker The LEDs look like they are lit 2 On completion of diagnose by the inverter checker be sure to re crimp the FASTON terminals Otherwise the terminals may be burned due to loosening Direction of crimp FASTON terminal R15292 126 Check SiBE061121 5 8 Rotation Pulse Check on the Outdoor Unit PCB Check No 16 25 35 class 1 Check that the voltage between the pins 10 11 is 15 VDC 2 Check if the Hall IC generates the rotation pulse 0 15 VDC 4 times between the pins 10 12 10 13 when the fan motor is manually rotated once 13 HV Hall IC 12 HU Hall IC 11 15 VDC 10 9 Free pin 8 Free pin 7 Phase W 6 Free pin 5 Free pin 4 Phase V 3 Free pin 2 Free pin 1 Phase U R11907 50 class Make sure that the voltage of 320 30 V is applied 1 Set operation off and power off Disconnect the connector S70 Check that the voltage between the pins 4 7 is 320 VDC Check that the control voltage between the pins 3 4 is 15 VDC Check that the
124. lobal environment protection do not discharge the refrigerant gas in the atmosphere Make sure to collect all the refrigerant gas Cautions for restoration Restore the piping by non oxidation brazing 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 Cut pipes on the main unit with a tube cutter in order to make it easy to disconnect 192 Outdoor Unit RXG25 35K2V1B SiBE061121 Step Procedure Note m Do not use a metal 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 ses St E Provide a protective sheet or a steel plate so that the brazing flame cannot influence peripheries 193 Removal Procedure SiBE061121 Outdoor Unit RXG25 35K2V1B 2 Removal of Compressor Procedure AN Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work step Procedure Points O Remove the 2 nuts of the compressor AP Warning Be careful not to get yourself burnt with pipes and ot
125. ltage current sensor abnormality 25 35 class CT or related abnormality 50 class 105 107 107 107 109 1 113 107 Outdoor temperature thermistor or related abnormality ck Ik Discharge pipe thermistor or related abnormality kel Ge ee Tri gt ts Al ni n Outdoor heat exchanger thermistor or related abnormality Electrical box temperature rise esch esch Radiation fin temperature rise t t U H Ik Output overcurrent detection Radiation fin thermistor or related abnormality Signal transmission error on outdoor unit PCB 50 class only 120 Displayed only when system down occurs 7 O Troubleshooting 4 2 Indoor Unit PCB Abnormality Remote Controller Display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes 71 U U l SiBE061121 The system checks if the circuit works properly within the microcomputer of the indoor unit The system cannot set the internal settings Wrong models interconnected Defective indoor unit PCB Disconnection of connector Reduction of power supply voltage Service Diagnosis SiBE061121 Troubleshooting Troubleshooting AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Check the combination of the indoor and outdoor unit Match the compatible models To secure the connection once disconnect the connector
126. motor winding Breaking of wire inside the fan motor Breaking of the fan motor lead wires Defective capacitor of the fan motor Defective indoor unit PCB Service Diagnosis SiBE061121 Troubleshooting Check No 02 Refer to P 122 Service Diagnosis Troubleshooting Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Turn off the power supply and rotate the fan by hand NO Replace the fan motor Does the fan rotate smoothly YES Turn the power on and start operation Note The motor may break when the motor connector is disconnected while remaining power supply Turn off the power supply NO and disconnect the fan motor connector then Does the fan rotate turn the power on YES Check No 02 Check the output of the fan motor connector s the motor power supply voltage 310 340 VDC generated NO Replace the indoor unit PCB YES Is the motor control voltage 15 VDC generated NO Replace the indoor unit PCB YES Is the rotation command YES voltage 1 5 Replace the fan VDC motor Stop the fan motor generated NO Check No 02 Check the output of the fan motor connector Is the rotation NO Replace the fan pulse generated motor and the indoor unit PCB Replace the indoor Is the rotation NO unit PCB pulse gt R
127. n Jele ILL R C with Back Lit jeje Ill Temperature Display Note Holding Functions No Functions List of Functions 2 SiBE061121 Part 2 Specifications hig SOC CHIC ATIOINS reede eenen Rete 4 Specifications SiBE061121 Specifications 1 Specifications 50 Hz 220 230 240 V Indoor Unit Cd FVXG25K2V1B FVXG35K2V1B EE RXG25K2V1B RXG35K2V1B 2 5 1 3 3 0 3 4 1 3 4 5 3 5 1 4 3 8 4 5 1 4 5 0 Capacity Rated Min Max 8 500 4 400 10 200 11 600 4 400 15 400 11 900 4 800 13 000 15 400 4 800 17 100 kcal h 2 150 1 120 2 580 2 920 1 120 3 870 3 010 1 200 3 270 3 870 1 200 4 300 ene eo ee ee EN Running Current Rated Ke 3 0 2 9 2 8 4 1 3 9 3 7 4 8 4 6 4 4 6 0 5 7 5 5 e Na Lon OW 550 300 790 780 290 1 270 950 310 1 150 1 210 290 1 460 Power Factor 83 3 82 5 81 8 86 5 87 0 87 8 90 0 89 8 90 0 91 7 92 3 91 7 COP Rated 4 55 4 33 3 80 4 36 4 48 3 54 3 68 4 52 3 30 3 72 4 83 3 42 S Gre Ges S 95 Ee Gas ee 035 9 18 0 0180 Heat Insulation Both Liquid and Gas Pipes Both Liquid and Gas Pipes Max Interunit Piping Length Max Interunit Height Difference Chargeless Amount of Additional Charge of 20 Indoor Unit FVXG25K2V1B FVXG35K2V1B Front Panel Color w 8 9 314 9 9 349 9 1 321 10 2 360 Kion Baie Zi sin 7 0 an 7 8 275 7 2 a 8 0 E cm F Moro w a oOo O ooo aS
128. n nt un ET EE 29 de Gonrol Speen EaAOM went aten enten ane 30 31 MOOSMISTATENV EE 30 3 2 Fregueney EE ebe deer dee EE 31 3 3 Controls at Mode Changing Start Up unne nennen venen eenenenn 33 3 4 Discharge Pipe Temperature Control 35 3 5 Input Current Control 36 3 6 Freeze up Protection Control 37 3 7 Heating Peak cut Control 37 3 0 Outdoor Fan GONUWO ER 38 3 9 Liquid Compression Protection Function an aen oeen erven eren enen 38 3 10 DIe Control Seege 39 3 11 Outdoor Electronic Expansion Valve Control eneen eeen 40 312 Ma leeden S arena E ten deenteeandenhaenes 43 Part 5 Operation Manual nnnnsnssnnnsnnsunssnnnnnnnnnsnnsnnnnnnennnnnnnnnn 44 1 System Configuration ann oanne neven ens enneneennensenenvennenvenenneenenenn 45 2 Operation MINUA za eneen eter adenine 46 Table of Contents ji SiBE061121 21 NAMES Of PAS eternet enten entel velen 46 2 2 Preparation before Operation 50 2 3 AUTO DRY COOL HEAT FAN Operation 52 2 4 RADIANT Operations nnn benden 53 2 5 Temperature Setting nsr anas erneennenvensner eenen vennen venen 54 2 6 Adjusting the Airflow Direction and Rate ccccccccssseeseseeseeeeeeeeeeneees 55 27 POWERFULOPDSMAUOM ee eebe ee AE 57 2 8 OUTDOOR UNIT QUIET Operation 58 29 IEGONO Operation wennen nennen 59 210 OPP JOUR 60 2 A ON TIMER Operation tse enden teater 61 212 WEEKLY TIMER OperatiOn EE 62 213 QUICK REIETENC EE 68 Part 6 Service Diagn
129. n that is not indispensable but may nevertheless be valuable to the reader such as tips and tricks Note Caution A caution is used when there is danger that the reader through incorrect manipulation may damage equipment loose data get Caution an unexpected result or has to restart part of a procedure Warning A warning is used when there is danger of personal injury AP Warning Reference A reference guides the reader to other places in this binder or in this manual where he she will find additional information on a specific topic SiBE061121 Part 1 List of Functions he tee EEN 2 List of Functions SiBE061121 Functions 1 Functions n n Basic Inverter with Inverter Power Control Health amp Air Air Purifying Filter Air Purifying Filter Function 10 10 Clean ae Operation Limit for Cooling CDB Photocatalytic Deodorizing Filter Operation Limit for Heating CWB Ea Ea SE EEN PAM Control O Titanium Apatite Photocatalytic saters jet eeo jeje Compressor Oval Scroll Compressor LL Ar Ener Prete Lee Swing Compressor efe Wipe Ciean Fat rend LL Rotary Compressor Weck Reluctance DO moor efe MOLD PROOF Operation Comfortable _ PowerArowFap Good Slesp Cooling Operation 1 Aiow Power Airiow Dual Flaps Timer WEEKLY TIMER Operation e e Wide Angle Lowers e e 24 Hour ONOFFTMER e e Venica Auto Swing Up and Dow e NGHTSET Mode fef
130. n valve If the refrigerant is short the discharge pipe temperature tends to rise Refrigerant shortage detection Ill Refrigerant shortage is detected by checking the difference between suction and discharge temperature Malfunction Refrigerant shortage detection I Decision The following conditions continue for 7 minutes Conditions lt 25 35 class gt e Input current x input voltage lt A x output frequency B e Output frequency gt C TT An Bw erg ass 61020 To lt 50 class gt Input current lt D x output frequency E Output frequency gt F Po E F Refrigerant shortage detection II The following conditions continue for 80 seconds e Opening of the outdoor electronic expansion valve gt G e Discharge pipe temperature gt H x target discharge pipe temperature J ppes HO TNO mme 25 35 class 128 128 128 128 cooling 20 heating 45 115 Service Diagnosis SiBE061121 Supposed Causes Service Diagnosis Troubleshooting Refrigerant shortage detection Ill 25 35 class only When the difference of the temperature is lower than K C it is regarded as refrigerant shortage K C C room thermistor temperature indoor heat exchanger temperature outdoor heat exchanger temperature outdoor temperature indoor heat exchanger temperature room thermistor temperature outdoor temperature outdoor heat exchanger temperature m Ifthe error repeats the system is
131. nction and Control SiBE061121 Main Functions Drawing of The following drawing shows a schematic view of the inverter principle Inverter Refrigerant circulation rate high So high speed Amount of heat exchanged air large Amount of heat exchanged air large Amount of heat gt Amount of heat exchanged air small exchanged air small low speed _ 4 freq 50 Hz TNM 60 Hz freq variable ean Refrigerant circulation rate low R2812 Inverter Features The inverter provides the following features m The regulating capacity can be changed according to the changes in the outdoor temperature and cooling heating load WR Quick heating and quick cooling The compressor rotational speed is increased when starting the heating or cooling This enables to reach the set temperature quickly m Even during extreme cold weather high capacity is achieved It is maintained even when the outdoor temperature is 2 C Bm Comfortable air conditioning A fine adjustment is integrated to keep the room temperature constant B Energy saving heating and 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 Frequency Fongen OOOO O O B Four way valve operation compensation Refer to page 34 B Compressor protection function Refer to page 34 m Discharge pipe
132. ng operation Cooling Operation Target temperature 3 0 C Target temperature 2 00 ebessen Target temperature 2 0 C Thermostat OFF Thermostat OFF Target temperature 2 5 C Heating Operation R11892 Ex When the target temperature is 25 C Cooling 23 C Thermostat OFF 22 C Switch to heating Heating 27 C Thermostat OFF 28 C Switch to cooling Function and Control 22 Main Functions SiBE061121 1 8 Thermostat Control Thermostat control is based on the difference between the room thermistor temperature and the target temperature Thermostat OFF Condition The temperature difference is in the zone A Thermostat ON Condition e The temperature difference returns to the zone C after being in the zone A e 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 Radiant 10 seconds Cooling Dry ON Room thermistor temperature target temperature Cooling 0 5 C C Dry 0 5 C 1 5 C B Cooling 2 0 C A Dry 2 5 2 0 C OFF R12319 Heating Radiant OEF Room thermistor temperature target temperature A 2 0 C B 1 5 C C 0 56 ON R12432 Refer to Temperature Control on page 15 for detail 23 Function and Control SiBE061121 Main Functions 1
133. ng operation switch PCB S90 S10 R11868 183 Removal Procedure SiBE061121 Outdoor Unit RXG25 35K2V1B mei Presi Paie 2 Remove the filter PCB 1 Release the harnesses from the hook R11869 2 Cut the clamp Wel SZ H WEN LE R11871 3 Release the harnesses from the hook d R11872 Removal Procedure 184 Outdoor Unit RXG25 35K2V1B SiBE061121 Procedure Points Release the harnesses from the hooks Remove the screw R11874 Unfasten the 2 hooks Filter PCB R11876 Lift and pull out the filter PCB R11877 185 Removal Procedure Outdoor Unit RXG25 35K2V1B SiBE061121 Procedure 186 m Refer to page 11 for detail S lge e SCH Nj P S Vl O Gel SI K Feature of the filter Removal Procedure Outdoor Unit RXG25 35K2V1B SiBE061121 2 4 Removal of Reactor Partition Plate Procedure ANY Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Procedure 1 enges the reactor BEEN Prepar
134. nge R13538 5 14 Power Module Check Check No 22 D Note Check to make sure that the voltage between and of the power module is approx O V before checking m Disconnect the compressor harness connector from the outdoor unit PCB To disengage the connector press the protrusion on the connector m Follow the procedure below to measure resistance between the terminals of the power module and the terminals of the compressor with a multi tester Evaluate the measurement results for a judgment Negative terminal of Power module UVW Power module UVW tester positive terminal for digital tester Positive terminal of UVW Power module UVW Power module tester negative terminal for digital tester Resistance is OK several kQ several MQ Resistance is NG 0 Q or oo Service Diagnosis 130 SiBE061121 Part Removal Procedure te MOOR UAE erna etn 132 bk une Ee gi ein gn EE 132 12 Removal r Alr EE 133 1 3 Removal of Front Grille Ay 134 1 4 Removal of Electrical Box PCBS ane eneneeneeneenene eneen 135 1 5 Removal of Horizontal Blade aanne een enne nennen eenen enn 148 1 6 REmoval of Swing MOTO eisena deden bindende 149 1 7 Removal of Radiant E insnet vetnek 150 1 8 Removal of Air Outlet Ay 155 1 9 Removal of Drain Pan Indoor Heat Exchanger ASSY 157 1 10 Removal of Fan Rotor Fan Motor 162 2 Outdoor Unit RXG25
135. nt panel R15018 Removal Procedure 132 SiBE061121 do Removal Procedure Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work Procedure AP Warning Pull down and remove the air filters upper 1 2 Removal of Air Filters Indoor Unit Procedure purifying filter from the frame not remove the Titanium when cleaning it apatite photocatalytic air ab O O C it dt Cc ab gt Ben en O H E Se 1 eren p OY EE ax SSC B sch willt Sec tettert S25 25525254 52525252 62529 SEN Eeer SE SS Si EENS Ss 5252522 255 ZE Titanium apatite photocatalytic air purifying filter Air filter upper lower Air filter Pull up and remove the air filters lower Remove the Titanium apatite photocatalytic air purifying filter 133 Indoor Unit SiBE061121 1 3 Removal of Front Grille ASSY Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work AP Warning Remove the 5 screws Procedure Procedure Unfasten the 3 lower BS L o gt C oO U el Ke c 2 Ox OO D E oO O CaS SN Front grille ASSY Remove the 2 screws to remove the side Side panel Remove the 2 screws to remove the side Remove the 3 screws to remove the suction ction grille 134 Removal Procedure Indoor Unit SiBE0611
136. oSiS OD Tz TROUDIESNOOUNG With LED consorci 71 SN DR elle ee A EE 71 12 Outdoor En EE 71 2 Problem Symptoms and Measures AA 72 3s SEICE ONECK FUNCTION BEE 73 A TFOUDISSAOONND EEN 76 4 1 Error Codes and Description aans E E A 76 4 2 Indoor Unit PCB Abnormality aanneem een eneneneenaneneennen 77 4 3 Freeze up Protection Control or Heating Peak cut Control 79 4 4 Fan Motor DC Motor or Related Abnormality 81 4 5 Radiant Panel Temperature Rise Indoor Electronic Expansion Valve Motor Operated Valve Abnormality Freeze up Protection Control 83 4 6 Thermistor or Related Abnormality Indoor Unit ees 85 4 7 Signal Transmission Error between Indoor Unit and Outdoor Unit 86 4 8 Unspecified Voltage between Indoor Unit and Outdoor Unit 88 4 9 Outdoor Unit PCB Abnormality anneer ennneneennneneennen 89 4 10 OL Activation Compressor Overload nnn annnn eneen nnee 91 411 Compressor LOCK EEN 92 412 DG FAN LOEK vernederende enheid 93 4 13 Input Overcurrent Detection aaneen venen een enn venen vaneen venen vens 94 4 14 Four Way Valve Abnormality aaneen ennen eneneneenenenen venen 95 4 15 Discharge Pipe Temperature Control 97 4 16 High Pressure Control in Cooling uunnsenennnen nennen ennen vennen 98 4 17 Compressor System Sensor Abnormality aanne eneen 99 4 18 Position Sensor Abnormality o
137. of connecting wires Wrong indoor unit PCB or outdoor unit PCB mounted Defective indoor unit PCB Defective outdoor unit PCB Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged AE Caution Check the combination of the indoor and outdoor unit w gt z YES Match the compatible models Are the connection wires connected property NO Correct the connection YES Check the code numbers 2P01234 for example of the indoor and outdoor unit PCB with the Parts List NO Matched compatibly Change for the correct PCB YES Replace the indoor unit PCB or the outdoor unit PCB R11707 88 Troubleshooting SiBE061121 4 9 Outdoor Unit PCB Abnormality 4 9 1 25 35 Class Remote Controller Display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Troubleshooting 89 gt gt RI The system follows the microprocessor program as specified The system checks to see if the zero cross signal comes in properly The microprocessor program runs out of control The zero cross signal is not detected Defective outdoor unit PCB Broken harness between PCBs Noise Momentary fall of voltage Momentary power failure etc AP Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged x Before you check the LED A Turn on
138. on of current dropping and stop value according to the outdoor temperature The current drops when outdoor temperature becomes higher than a certain level depending on the model 36 Control Specification SiBE061121 3 6 Freeze up Protection Control Outline During cooling operation the signal sent from the indoor unit controls the operating frequency limitation and prevents freezing of the indoor heat exchanger The signal from the indoor unit is divided into zones Detail The operating frequency limitation is judged with the indoor heat exchanger temperature Indoor heat exchanger thermistor temperature Reset zone 7C Keep zone 5 C Dropping zone Stop zone raes 3 7 Heating Peak cut Control Outline During heating operation the indoor heat exchanger temperature determines the frequency upper limit to prevent abnormal high pressure Detail Stop zone AC BC Cc Dropping zone D C Keep zone ECG Indoor heat exchanger Reset zone thermistor temperature R14645 37 Function and Control SiBE061121 Control Specification 3 8 Outdoor Fan Control 1 Fan ON control to cool down the electrical box The outdoor fan is turned ON when the electrical box temperature is high while the compressor is OFF 2 Fan OFF control while defrosting The outdoor fan is turned OFF while defrosting 3 Fan OFF delay when stopped The outdoor fan is turned OFF 60 seconds after the compressor stops
139. on valve works Diagnose with remote controller 6 indication Diagnose by service port pressure Check for refrigerant shortage and operating current Large operating noise and Check the output voltage of the vibrations power module Check the power module Check the installation condition Check if the required spaces for installation specified in the installation manual are provided 7 7 1 4 5 A 1 13 Service Diagnosis 72 Service Check Function SiBE061121 3 Service Check Function Check Method 1 1 When the timer cancel button is held down for 5 seconds 55 is displayed on the temperature display screen Back A Next CJ D Off Select On CJ Cancel Timer cancel button C___ Timer EC lt ARC466 Series gt R14553 2 Press the timer cancel button repeatedly until a long beep sounds m The code indication changes in the sequence shown below D Note 1 A short beep or two consecutive beeps indicate non corresponding codes 2 To return to the normal mode hold the timer cancel button down for 5 seconds When the remote controller is left untouched for 60 seconds it also returns to the normal mode 3 Not all the error codes are displayed When you cannot find the error code try the check method 2 Refer to page 74 73 Service Diagnosis SiBE061121 Service Check Function Check Method 2 1 Press the center of the Temp button and the Mode button at the same time
140. ontrol in Cooling Ge Ge a Remote CO Controller Display Method of High pressure control operation halt frequency drop etc is activated in cooling operation if Malfunction the temperature sensed by the outdoor heat exchanger thermistor exceeds the limit Detection Malfunction m The temperature sensed by the outdoor heat exchanger thermistor rises above about 65 C Decision m The error is cleared when the temperature drops below about 50 C Conditions Supposed The installation space is not large enough Causes Dirty outdoor heat exchanger Defective outdoor fan motor Defective stop valve Defective outdoor electronic expansion valve or coil Defective outdoor heat exchanger thermistor Defective outdoor unit PCB Troubleshooting AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Check No 01 SEN Refer to P 121 eck the installation space Check No 17 CNECK NO 12 Check the installation Change the installation Refer to P 123 condition location or direction Clean the outdoor heat exchanger Check No 17 Check No 19 NG Refer to P 128 Check the outdoor fan Replace the fan motor Reconnect the connector or OK fan motor lead wires Check No 18 Check No 18 W Refer to P 128 Check the discharge Replace the stop valve pressure OK Check No 19 rege e eck No Refer to P 129 Check the outdoor electronic Me Replace the ou
141. otation pulse pins 4 1 Check No 02 anr S1 Motor power supply voltage 310 340 VDC Unused Unused GND Motor control voltage 15 VDC Rotation command voltage 1 5 VDC Rotation pulse input NOU Ek OO N OOO EE OO R12404 5 3 Power Supply Waveforms Check Check No 11 Measure the power supply waveform between No 1 and No 2 on the terminal board and check the waveform disturbance m Check to see if the power supply waveform is a sine wave Fig 1 m Check to see if there is waveform disturbance near the zero cross sections circled in Fig 2 Fig 1 Fig 2 R1444 R1736 Service Diagnosis 122 Check SiBE061121 5 4 Electronic Expansion Valve Coil Check Check No 12 4 5 Conduct the followings to check the electronic expansion valve coil EV 1 2 3 Check to see if the EV connector is correctly connected to the PCB Turn the power off and on again and check to see if the EV generate a latching sound If the EV does not generate a latching sound in the above step 2 disconnect the connector and check the continuity using a tester Check the continuity between the pins 1 6 2 6 3 6 and 4 6 If there is no continuity between the pins the EV coil is faulty Harness 5P 6 1 Indoor unit S50 relay connector 5 6 2 Outdoor unit S20 6P Connector Check 6 3 123456 ge R15312 If the continuity is confirmed in the above step 3 the PCB is faulty D Note Pleas
142. oval Procedure 210 Outdoor Unit RXG50K2V1B SiBE061121 ae procedure Pots 8 Remove the 3 screws of the main PCB Main PCB 9 Unfasten the 4 hooks 10 Lift up and remove the m Refer to page 13 for detail 211 Removal Procedure SiBE061121 Outdoor Unit RXG50K2V1B 3 5 Removal of Sound Blankets Thermistors Procedure AN Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work ae procedure Pons 1 Remove the sound blanket back Sound blanket back e Lem er et ZN oi R11161 2 Remove the sound AE m Since the piping ports are blanket outer outen SR torn easily remove the sound blanket carefully WEY i Wu Wc d ig N A Hu i 3 Remove the sound e blanket top upper Wm D Sound blanket top upper Removal Procedure 212 Outdoor Unit RXG50K2V1B SiBE061121 step Procedure Points Remove the sound blanket top lower SE oC Remove the sound blanket inner aA Sound blanket inner R5296 Release the discharge Be careful not to lose the clip pipe thermistor l mt UI Eh ech i for the thermistor ox at ys teg a 7 OQ Discharge pipe thermistor R12286 ee
143. p Protection Control 83 4 6 Thermistor or Related Abnormality Indoor Unit 85 4 7 Signal Transmission Error between Indoor Unit and Outdoor Unit 86 4 8 Unspecified Voltage between Indoor Unit and Outdoor Unit 88 4 9 Outdoor Unit PCB Abnormality oaeen eneen eneen ens eenenennen 89 4 10 OL Activation Compressor Overload annen enenn enn nen eneen 91 det ee lege ee 92 412 DOC Fanm ele 93 4 13 Input Overcurrent Detection aaneen neneenenenvenerennerenen ennn 94 4 14 Four Way Valve Abnormality aaneen nennen ennrennenennenennen 95 4 15 Discharge Pipe Temperature Control 97 4 16 High Pressure Control in Cooling naan senen en ennnen eenen eenenn 98 4 17 Compressor System Sensor Abnormality aanne 99 4 18 Position Sensor Abnormality pareren eneen dertebaadea tee 101 4 19 DC Voltage Current Sensor Abnormality 25 35 Class 104 4 20 CT or Related Abnormality 50 Class 105 4 21 Thermistor or Related Abnormality Outdoor Unit 107 4 22 Electrical Box Temperature ise 109 4 23 Radiation Fin Temperature ise 111 4 24 Output Overcurrent Detection ccccceccceececeeeeeeeeceeeeseeeseeeesseeesaeeens 113 425 Remdgerant SO OMAGC nannieb eed 115 4 26 Low voltage Detection or Over voltage Detection ees 118 4 27 Signal Transmission Error on Outdoor Unit PCB 50 Class Only 120 De ne 121 5 1 Thermistor Resistance Check
144. pacitor supplies high voltage electricity to the electrical components of the outdoor unit Be sure to discharge the capacitor completely before conducting repair work A charged capacitor may cause an electrical shock Do not start or stop the air conditioner operation by plugging or unplugging the power cable plug Plugging or unplugging the power cable plug to operate the equipment may cause an electrical shock or fire vi Introduction vil SiBE061121 Be sure to wear a safety helmet gloves and a safety belt when working at a high place more than 2 m Insufficient safety measures may cause a fall accident In case of R 410A refrigerant models be sure to use pipes flare nuts and tools for the exclusive use of the R 410A refrigerant The use of materials for R 22 refrigerant models may cause a serious accident such as a damage of refrigerant cycle as well as an equipment failure Do not repair the electrical components with wet hands Working on the equipment with wet hands may cause an 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 may cause injury Be sure to conduct repair work wi
145. peration WEEKLY TIMER Operation Up to 4 timer settings can be saved for each day of the week It is convenient if the WEEKLY TIMER is set according to the family s life style E Using in these cases of WEEKLY TIMER Example the same timer settings are made for the week from Monday through Friday while different timer settings are made for the weekend Monday Make timer settings up to programs 1 4 Program 1 Program 2 Program 3 Program 4 ON O OFF OFF N TT 5 MD a gt 8 30 30 6 00 17 22 00 Tuesday Use the copy mode to make settings for Tuesday to Friday because these settings are the same as to those for Monday 4 Program 1 Program 2 Program 3 Program 4 ON OFF ON OFF SEH EN gt RL aD E BENN ED 6 00 8 30 17 30 22 00 Saturday No timer settings Sunday Make timer settings up to programs 1 4 Program 1 Program 2 Program 3 Program 4 ON OFF LIT BEB 0 00 8 00 1 e Up to 4 reservations per day and 28 reservations per week can be set in the WEEKLY TIMER The effective use of the copy mode ensures ease of making reservations e The use of ON ON ON ON settings 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 off the air conditioner automatically if the user forgets to turn it off 21 Operation Manua
146. perature Control Outline The discharge pipe temperature is used as the internal temperature of the compressor If the discharge pipe temperature rises above a certain level the upper limit of frequency is set to keep this temperature from rising further Detail Dropping zone Keep zone EG Reset zone Discharge pipe R14642 temperature ed Ser ACO B CC ECC pc e Im E 0 35 Function and Control SiBE061121 Control Specification 3 5 Input Current Control Outline Detail Function and Control The microcomputer calculates the input current while the compressor is running and sets the frequency upper limit from the input current In case of heat pump model this control which is the upper limit control of the frequency takes priority over the lower limit of control of four way valve operation compensation Compressor Stop Stop Zone Dropping Zone Keep Zone Input current Reset Zone R14643 Frequency control in each zone Stop zone After 2 5 seconds in this zone the compressor is stopped Dropping zone e The upper limit of the compressor frequency is defined as operation 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 e Limit of the frequency is canceled SE CSC a a a ea eas s ss Cas Css 67 75 o Limitati
147. quency Lower limit function FMIN Four way valve operating compensation etc R14641 Initial frequency PI control Defrost control Detail How to Determine Frequency The compressor s frequency is determined by taking the following steps ON en N Determine command frequency Command frequency is determined in the following order of priority Limiting defrost control time Forced cooling Indoor frequency command Determine upper limit frequency The minimum value is set as an 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 Determine lower limit frequency The maximum value is set as an lower limit frequency among the frequency lower limits of the following functions Four way valve operation compensation draft prevention pressure difference upkeep 4 Determine prohibited frequency 31 There is a certain prohibited frequency such as a power supply frequency Function and Control SiBE061121 Function and Control Control Specification Indoor Frequency Command AD signal The difference between the room thermistor temperature and the target temperature is taken as the AD signal and is used for frequency command Temperature A Temperature Temperature D Temperature difference signa difference signa difference signal difference signa 2 0
148. r holder on the wall 1 Choose a place from where the signals reach the unit 2 Fix the holder to a wall a pillar or similar location with the screws procured locally 3 Place the remote controller in the remote controller holder B To set the luminance of the display e The luminance of the indoor unit display can be set controller holder Brightness Press Ei Hi gt Low gt SEI E Notes on batteries e When replacing the batteries use batteries of the same type and replace both old batteries together e When the system is not used for a long time take the batteries out e The batteries will last for approximately 1 year If the remote controller display begins to fade and the degradation of reception performance occurs within a year however replace both batteries with new size AAA LROS3 alkaline e The attached batteries are provided for the initial use of the system The usable period of the batteries may be short depending on the manufactured date of the air conditioner E Notes on remote controller e Never expose the remote controller to direct sunlight e Dust on the signal transmitter or receiver will reduce the sensitivity Wipe off dust with soft cloth e Signal communication may be disabled if an electronic starter type fluorescent lamp such as inverter type lamps is in the room Consult the shop if that is the case e If the remote controller signals happen to operate another appliance move that app
149. r or its installation work when it is actually due to improper handling The installation work and the handing over of the unit can only be considered completed when its handling has been fully explained to the user without using technical terms and while imparting full knowledge of the equipment 45 Operation Manual SiBE061121 Operation Manual 2 Operation Manual 2 1 Names of Parts Name of Parts Indoor Unit Louvers vertical blades e The louvers are inside of the air outlet Air outlet TE O Radiant panel GE Front panel RS Air inlet IT Flap horizontal blade Q esn Ku Room temperature sensor e t detects the air temperature around the unit Display Signal receiver and Indoor unit ON OFF switch Signal receiver e t receives signals from the remote controller e When the unit receives a signal you will hear a beep sound Sound type beep beep OPERATION lamp 1 TIMER lamp yellow Setting changed long beep green Indoor unit ON OFF switch e Press this switch once to start operation RADIANT lamp red Press once again to stop it gt Pane 12 e The operation mode refer to the following table AUTO AUTO e This switch is useful when the remote controller is missing Operation Manual 46 Operation Manual SiBE061121 E Open the front panel Front panel stopper e
150. re is large or to warm up the room quickly CAUTION e During the RADIANT operation the surface temperature of the panel will be about 55 C at maximum Even after the RADIANT operation is finished the surface temperature of the panel of the air conditioner stays hot for a while Do not touch the air conditioner until the surface temperature of the panel decreases Be careful that children do not touch the surface of the panel E Notes on RADIANT operation e f RADIANT2 operation does not warm up the room use HEAT or RADIANT1 operation e RADIANT1 can be used with POWERFUL operation RADIANT2 cannot be used with the POWERFUL operation e This operation may not warm up the room adequately depending on conditions such as an extremely low outside temperature and lack of adequate performance e The RADIANT operation uses the auto fan speed so the airflow rate cannot be changed e When the RADIANT operation starts the temperature of the radiant panel increases SiBE061121 Operation Manual SiBE061121 Operation Manual 2 5 Temperature Setting Temperature Setting B To change the temperature setting Press e The displayed items on the LCD will change whenever either one of the buttons is pressed HEAT or RADIANT operation 18 32 C 10 30 C 18 30 C COOL operation AUTO operation DRY or FAN operation Press A to raise the temperature and press W to lower the The temperature sett
151. rent as shown at Replace the outdoor unit right We cable 1 Current Capacitor charged when PCB guideline the indoor unit or outdoor unit main relay turns on NO Check No 21 Check the capacitor voltage N O Measure the rectifier input voltage YES Rising with increasing frequency Turn off the power Disconnect the harnesses U V and W Inverter checker Part No 1225477 Check No 15 Check with the inverter checker Correct the power supply or replace the outdoor unit PCB Turn off the power and reconnect the harnesses Then turn on the power again and restart operation Compressor running Replace the outdoor unit PCB Replace the compressor Voltage within the allowable range Power supply Replace the outdoor unit voltage 15 PCB Check the power supply voltage R15382 Service Diagnosis 106 Troubleshooting SiBE061121 4 21 Thermistor or Related Abnormality Outdoor Unit Remote Controller Display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Troubleshooting 107 en v4 I ve a LI gt I z I OD DO i gt Li gt This fault is identified based on the thermistor input voltage to the microcomputer A thermistor fault is identified based on the temperature sensed by each thermistor m The thermistor input voltage is above 4 96 V or below 0 04 V with
152. ressor OL Malfunction Detection Malfunction m Ifthe error repeats the system is shut down Decision m Reset condition Continuous run for about 60 minutes without any other error Conditions The operating temperature condition is not specified Supposed m Defective discharge pipe thermistor Causes m Defective outdoor electronic expansion valve or coil m Defective four way valve or coil m Defective outdoor unit PCB m Refrigerant shortage m Water mixed in refrigerant m Defective stop valve Troubleshooting AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Check No 01 Refer to P 121 Discharge pipe thermistor Insert the thermistor in disconnected position Check No 12 Refer to P 123 Check No 01 R Check the thermistors Replace the discharge pipe x Discharge pipe thermistor thermistor Check No 13 Refer to P 124 Check No 14 Refer to P 124 Check No 12 Check the outdoor electronic expansion valve coil Replace the outdoor electronic expansion valve or the coil Check No 13 Check the four way valve Replace the four way valve or the coil Replace the outdoor unit PCB Check No 14 Check the refrigerant line Refer to the refrigerant line Refrigerant shortage check procedure x Water mixed Stop valve Replace the outdoor unit PCB R14438 91 Service Diagnosis SiBE061121
153. rmistor is used for controlling target discharge pipe temperature The system sets the target discharge pipe temperature according to the outdoor and indoor heat exchanger temperature and controls the outdoor electronic expansion valve opening so that the target discharge pipe temperature can be obtained In cooling operation the indoor heat exchanger thermistor is used for freeze up protection control If the indoor heat exchanger temperature drops abnormally the operating frequency becomes lower or the operation halts In heating operation the indoor heat exchanger thermistor is used for detecting disconnection of the discharge pipe thermistor When the discharge pipe temperature becomes lower than the indoor heat exchanger temperature the discharge pipe thermistor is judged as disconnected The radiant panel thermistors are used for calculating radiant panel surface temperature Due to structural and manufactural restrictions the radiant panel surface temperature cannot be controlled directly with a thermistor Thermistors are mounted on the radiant panel piping in order to calculate the radiant panel surface temperature The indoor electronic expansion valve is controlled according to the radiant panel surface temperature The radiant panel thermistors are used for detecting malfunction of the indoor electronic expansion valve Function and Control SiBE061121 Control Specification 3 Control Specification 3 1 Mo
154. rocedure Sound blanket bottom A 2 piss ah rh Ai Pe T ER d NS VA EN d i Q O PS SS Be R11888 Outdoor Unit RXG25 35K2V1B Outdoor Unit RXG25 35K2V1B SiBE061121 2 6 Removal of Four Way Valve Procedure AN Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work ae procedure Points o 1 Pull out the outdoor electronic expansion valve coil m Outdoor electronic is J expansion ell l N valve coil PF a 4 K eal 1 D kein SN En We AN R15368 2 Remove the terminal Hd C A he TDS AY SA N a DS 3 Disconnect the lead wires of the compressor R7235 191 Removal Procedure SiBE061121 Remove the screw and remove the four way valve coil m Before working make sure that the refrigerant gas is empty in the circuit Be sure to apply nitrogen replacement when heating up the brazed part Heat up the brazed part and withdraw the piping with pliers Removal Procedure Procedure Four way valve coil Outdoor Unit RXG25 35K2V1B Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine AP Warning If the refrigerant gas leaks during work ventilate the room If the refrigerant gas is exposed to flames toxic gas may be generated AP Caution From the viewpoint of g
155. rol Defrost control Pressure equalizing control Opening limit control 40 Control Specification SiBE061121 3 11 1 Fully Closing with Power ON The outdoor electronic expansion valve is initialized when turning on the power The opening position is set and the pressure equalization is developed 3 11 2 Pressure Equalizing Control When the compressor is stopped the pressure equalization control is activated The outdoor electronic expansion valve opens and develops the pressure equalization 3 11 3 Opening Limit Control Outline A maximum and minimum opening of the outdoor electronic expansion valve are limited Detail Tees Maximum opening pulse 480 480 Minimum opening pulse The outdoor electronic expansion valve is fully closed when cooling operation stops and is opened at fixed degree during defrosting 3 11 4 Starting Operation Control The outdoor electronic expansion valve opening is controlled when the operation starts and prevents the superheating or liquid compression 3 11 5 Control when the frequency changes When the target discharge pipe temperature control is active if the target frequency is changed for a specified value in a certain time period the target discharge pipe temperature control is canceled and the target opening of the outdoor electronic expansion valve is changed according to the shift 3 11 6 High Discharge Pipe Temperature When the compressor is
156. rotector SACK disconnect the connector for S40 l D Zn the fan motor according to i the Removal of Outer Panels Fan Motor WZ J lor NE Es 7 US LU R11846 2 Disconnect the connector for the four way valve coil S80 3 Disconnect the 2 m The colors of the harnesses connectors for the white or brown do not reactor Mg matter to the position of the Z connector Removal Procedure 176 Outdoor Unit RXG25 35K2V1B SiBE061121 Step Procedure 4 Disconnect the relay connector for the compressor GC E E DE E Ce 2 dl SG Jee Z f Z 4 Sl G R11845 5 Disconnect the connector for the outdoor electronic expansion valve coil S20 6 Cut the clamp GAU SS GD 7 Pull out the outdoor m Be careful not to lose the clip heat exchanger for the thermistor thermistor Sl l a Outdoor heat W Gi exchanger thermistor R11851 Removal Procedure SiBE061121 Release the discharge pipe thermistor Lift and remove the electrical box Removal Procedure Outdoor Unit RXG25 35K2V1B Procedure m Be careful not to lose the clip for the thermistor R12279 Discharge pipe thermistor R11849 Electrical Box R11852 178 Outdoor Unit RXG25 35K2V1B SiBE061121 2 3 Removal of PCBs Procedure ANY Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling
157. s R15037 Removal Procedure 138 Indoor Unit SiBE061121 Procedure Points Disconnect the connector for the earth FG FG H ER SS Dee EE SZ e E tl Mn as L N CH ia WV R15038 JS R 5 Unfasten the hook and disconnect the connector for the fan motor S1 R15039 Unfasten the hook and disconnect the connector for the terminal board S2 R15040 Unfasten the 2 hooks Og Al D Bo R Die GC vemm Isi ez R15041 139 Removal Procedure SiBE061121 Indoor Unit Procedure Step Remove the main PCB Iaea et Hell E oO Sd S6 S33 S26 S382 S34 S46 R15042 S1 fan motor S2 terminal board S6 swing motor S26 service PCB S30 indoor electronic expansion valve coil S32 indoor heat exchanger thermistor S33 room temperature thermistor S34 radiant panel thermistors S46 display PCB FG earth m Refer to page 8 for detail Remove the 3 Remove the service PCB 3 Remove the service PCB Unfasten the hook 4 E j l on X Ng l A a Se ji 7 j R15043 The service PCB is now Sch easy to manage WO PE lef INS 5 d a Gy aes NN Removal Procedure 140 Indoor Unit SIBEO6TI21 Unit SiBE061121 Procedure Unfasten the hook and disconnect the conn
158. s the movement of the indoor unit fan In RADIANT 1 the rotation speed of the Rotation speed of indoor indoor unit fan is controlled depending on unit fan the difference between the set temperature and the room temperature In RADIANT 2 the rotation speed of the indoor unit fan is constant R14637 1 5 3 RADIANT Operation and Optional Function Some optional function cannot be used with RADIANT 1 or RADIANT 2 at the same time Function RADIANT RADIANT 2 POWERFUL operation not available ECONO operation not available not available QUIET operon Function and Control 20 Main Functions SiBE061121 1 6 Program Dry Operation Outline Program dry operation removes humidity while preventing the room temperature from lowering Since the microcomputer controls both the temperature and airflow rate the temperature adjustment and fan adjustment buttons are inoperable Detail The microcomputer automatically sets the temperature and airflow rate The difference between the room thermistor temperature at start up and the target temperature is divided into two zones Then the unit operates with an appropriate capacity for each zone to maintain the temperature and humidity at a comfortable level Room thermistor Target temperature Thermostat OFF point Thermostat ON point temperature at start up X Y Z X 0 5 C 24 C or more or Y 0 5 C zone B Room thermistor continues for 10 min temperature at start up xX 05
159. screws of the sub air outlet ASSY R15100 8 Turn over the sub air outlet ASSY and remove the 3 screws EE D PEPE eee 9 To divide the sub air outlet ASSY unfasten the 4 hooks and release the hook of the upper air outlet ASSY from the interlock rod DN ASE tl UZ TN A WT IC Lower air outlet ASSY R15290 Removal Procedure 156 Indoor Unit SiBE061121 1 9 Removal of Drain Pan Indoor Heat Exchanger ASSY Procedure AP Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work step Procedure Points O O 1 Remove the drain pan m The drip proof sheet is 1 Unfasten the hook and transparent remove the drip proof sheet Drip proof sheet R15103 2 Remove the screw 3 Remove the piping fixture
160. shut down m Reset condition Continuous run for about 60 minutes without any other error 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 compression performance of compressor Defective outdoor electronic expansion valve 116 Troubleshooting SiBE061121 Troubleshooting AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Check No 01 ada ge Replace them in position disconnected x Discharge pipe thermistor P P l Indoor or outdoor heat exchanger thermistor Room temperature thermistor Check No 12 o Outdoor temperature thermistor Refer to P 123 YES Stop valve closed Check for refrigerant shortage Oil oozing at relay pipe connections Open the stop valve YES Repair the pipe flare or replace the union NO Oil oozing at internal YES piping NO Compressor vibrating Ma too much Check the power transistor harness for looseness Correct it as required Also NO replace the cracked pipe Check the pipes for improper contact Correct them as required Also replace the cracked pipe Check No 12 Outdoor electronic expansion valve functioning NO Replace the outdoor electronic expansion valve YES Change for a specif
161. splay Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes 101 har ed KI mee A compressor start up failure is detected by checking the compressor running condition through the position detection circuit m Ifthe error repeats the system is shut down Reset condition Continuous run for about 11 minutes 50 class 5 minutes without any other error Disconnection of the compressor relay cable Defective compressor Defective outdoor unit PCB Start up failure caused by the closed stop valve Input voltage is outside the specified range Service Diagnosis SiBE061121 Troubleshooting Troubleshooting 25 35 class AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Check No 15 Refer to P 125 Turn off the power Check No 18 Check the power supply voltage Refer to P 128 Check No 20 Refer to P 129 NO Voltage as rated Correct the power supply YES Check No 18 Check the discharge pressure NO Replace the stop valve YES Check No 20 Check the short circuit of the diode bridge NO Replace the outdoor unit PCB YES Check the connection Electrical components or compressor harnesses connected as specified NO Reconnect them as specified YES Turn on the power Check the electrolytic capacitor voltage ee YES Replace the outdoor unit P
162. stop the forced cooling operation Detail 1 2 3 4 ed Hexagonal N wrench Close Liquid stop valve Gas stop valve P Valve cap Service port Refer to page 221 for forced cooling operation R13628 Trial Operation and Field Settings 220 Forced Cooling Operation SiBE061121 2 Forced Cooling Operation ltem Forced Cooling Conditions The forced cooling operation is allowed when both the following conditions are met 1 The outdoor unit is not abnormal and not in the 3 minute standby mode 2 The outdoor unit is not operating Start The forced cooling operation starts when any of the following conditions is fulfilled 1 Press the forced cooling operation ON OFF button S1W on the indoor unit for 5 seconds 2 Press the forced cooling operation ON OFF switch SW1 on the outdoor unit Command 25 35 class 58 Hz frequency 50 class 66 Hz End The forced cooling operation ends when any of the following conditions is fulfilled 1 The operation ends automatically after 15 minutes 2 Press the forced cooling operation ON OFF button S1W on the indoor unit again 3 Press the ON OFF button on the remote controller 4 Press the forced cooling operation ON OFF switch SW1 on the outdoor unit Others The protection functions are prior to all others in the forced cooling operation Indoor Unit ON OFF button S1W R14649 Outdoor Unit 25 35 class NI HI
163. t circuited air Clogged air filter of the indoor unit Dust accumulation on the indoor heat exchanger Defective indoor heat exchanger thermistor Defective indoor unit PCB Service Diagnosis SiBE061121 Troubleshooting Check No 01 Refer to P 121 Service Diagnosis Troubleshooting AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Check the air passage YES Provide sufficient air passage Is there any short circuit O N Check the air filter N Clean the air filter mar D O YES Check the dust accumulation on the indoor heat exchanger YES Clean the indoor heat exchanger NO Check No 01 Check the indoor heat exchanger thermistor Does it conform to the thermistor characteristic chart Replace the thermistor Replace the indoor unit PCB R14402 80 SiBE061121 Troubleshooting 4 4 Fan Motor DC Motor or Related Abnormality Remote Controller Display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes 81 al a p J L The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor operation The detected rotation speed does not reach the demanded rotation speed of the target tap and is less than 50 of the maximum fan motor rotation speed Layer short inside the fan
164. tdoor Ge valve electronic expansion valve coil or the coil OK Replace the outdoor unit PCB Check No 01 NG Service Diagnosis Check the outdoor heat exchanger thermistor Replace the outdoor heat exchanger thermistor OK Replace the outdoor unit PCB R14413 98 Troubleshooting SiBE061121 4 17 Compressor System Sensor Abnormality 4 17 1 25 35 Class Remote Controller Display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Troubleshooting 99 l we vo m The system checks the DC current before the compressor starts m The DC current before compressor start up is out of the range 0 5 4 5 V sensor output converted to voltage value m The DC voltage before compressor start up is below 50 V m Broken or disconnected harness m Defective outdoor unit PCB Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged AE Caution Check the relay harness for the compressor Is the harness broken Replace the harness Turn off the power and turn it on again Restart operation and error displayed again No problem Keep on running Replace the outdoor unit PCB R11712 Service Diagnosis SiBE061121 Troubleshooting 4 17 2 50 Class Remote HL Controller Display Method of m The system checks the power supply voltage and the DC voltage before the compressor
165. te Photocatalytic Air Purifying Filter This filter combines the Air Purifying Filter and Titanium Apatite Photocatalytic Deodorizing Filter as a single highly effective filter The filter traps microscopic particles decomposes odors and even deactivates bacteria and viruses It lasts for 3 years without replacement if washed about once every 6 months 1 12 5 Auto restart Function If a power failure including one for just a moment occurs during the operation the operation restarts automatically when the power is restored in the same condition as before the power failure D Note Ittakes 3 minutes to restart the operation because the 3 minute standby function is activated 1 12 6 WEEKLY TIMER Operation Up to 4 timer settings can be saved for each day of the week up to 28 settings in total Those 3 items of ON OFF temperature and time can be set Refer to page 62 for detail 27 Function and Control SiBE061121 Main Functions 1 12 7 Brightness Setting of the Indoor Unit Display Each time you press the Brightness button on the remote controller the brightness of the indoor unit display changes to high low or off Refer to the operation manual for details Indoor unit display Timer lamp yellow Operation lamp green Radiant lamp red R14639 Function and Control 28 Function of Thermistor SiBE061121 2 Function o
166. temperature control Refer to page 35 B Input current control Refer to page 36 B Freeze up protection control Refer to page 37 E Heating peak cut control Refer to page 37 m Defrost control Refer to page 39 Forced Cooling Refer to page 221 for detail Operation Function and Control 16 Main Functions SiBE061121 1 3 Airflow Direction Control Wide Angle The louvers made of elastic synthetic resin provide a wide range of airflow that guarantees a Louvers comfortable air distribution You can adjust the position of the louvers ETS WE Reg Se de ND R14632 R14633 Auto Swing The swinging range of the flap is the same in any operation mode 99 R14634 17 Function and Control SiBE061121 Main Functions 1 4 Fan Speed Control for Indoor Unit Outline Phase control and fan speed control contains 9 steps LLL LL SL L ML M MH H and HH The airflow rate can be automatically controlled depending on the difference between the room thermistor temperature and the target temperature This is done through phase control and Hall IC control For more information about Hall IC refer to the troubleshooting for fan motor on page 81 Automatic Fan In automatic fan speed operation the step SL is not available Cooling Heating _ R6834 Step NM HH R6833 Speed Control POWERFUL The airflow rate is automatically controlled within this range when the FAN setting
167. th appropriate tools The use of inappropriate tools may cause injury Be sure to check that the refrigerating cycle section has cooled down enough before conducting repair work Working on the unit when the refrigerating cycle section is hot may cause burns Use the welder in a well ventilated place Using the welder in an enclosed room may cause oxygen deficiency SiBE061121 Introduction 1 1 2 Cautions Regarding Safety of Users Be sure to use parts listed in the service parts list of the applicable model and appropriate tools to conduct repair work Never attempt to modify the equipment The use of inappropriate parts or tools may cause an electrical shock excessive heat generation or fire If the power cable and lead wires have scratches or deteriorated be sure to replace them Damaged cable and wires may cause an electrical shock excessive heat generation or fire Do not use a joined power cable or extension cable or share the same power outlet with other electrical appliances since it may cause an electrical shock excessive heat generation or fire Be sure to use an exclusive power circuit for the equipment and follow the local technical standards related to the electrical equipment the internal wiring regulations and the instruction manual for installation when conducting electrical work Insufficient power circuit capacity and improper electrical work may cause an electrical shock or fire Be sure to use the
168. the target temperature appropriately adjusted for the indoor unit and the temperature detected by room temperature thermistor 1 2 Frequency Principle Main Control Parameters Additional Control Parameters Inverter Principle 15 The compressor is frequency controlled during normal operation The target frequency is set by the following 2 parameters coming from the operating indoor unit B The load condition of the operating indoor unit B The difference between the room thermistor temperature and the target temperature The target frequency is adapted by additional parameters in the following cases WR Frequency restrictions B Initial settings m Forced cooling operation To regulate the capacity a frequency control is needed The inverter makes it possible to vary the rotation speed of the compressor The following table explains the conversion principle The supplied AC power source is converted into the DC power source for the present The DC power source is reconverted into the three phase AC power source with variable frequency E When the frequency increases the rotation speed of the compressor increases resulting in an increased refrigerant circulation This leads to a higher amount of the heat exchange per unit B When the frequency decreases the rotation speed of the compressor decreases resulting in a decreased refrigerant circulation This leads to a lower amount of the heat exchange per unit Fu
169. the power again cancel the standby electricity saving function by operating fan operation with the remote controller x Wait at least for 7 sec after NO turning on the power Is LED A blinking Replace the outdoor unit PCB YES Check to see if the outdoor unit is grounded NO Grounded Ground the system YES Is the harness YES broken Replace the harness NO Zero cross signal abnormality Replace the outdoor unit PCB R14186 Service Diagnosis SiBE061121 4 9 2 50 Class Remote Controller Display Method of Malfunction Detection Malfunction Decision Conditions Supposed Causes Troubleshooting Service Diagnosis gt RI Troubleshooting Detection within the program of the microcomputer The program of the microcomputer is in abnormal running order Defective outdoor unit PCB Noise Momentary fall of voltage Momentary power failure AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Turn on the power again NO Check to see if the unit is grounded YES Replace the outdoor unit PCB Ground the system The cause can be external factors other than malfunction Investigate the cause of noise R7183 90 Troubleshooting SiBE061121 4 10 OL Activation Compressor Overload Remote C 3 Controller Display Method of A compressor overload is detected through comp
170. the power on mE 5 error is judged if the discharge pipe temperature is lower than the heat exchanger temperature m Disconnection of the connector for the thermistor Defective thermistor corresponding to the error code m Defective heat exchanger thermistor in the case of 5 error outdoor heat exchanger thermistor in cooling operation or indoor heat exchanger thermistor in heating operation m Defective outdoor unit PCB In case of ou AN Caution Replace the outdoor unit PCB Be sure to turn off the power switch before connecting or disconnecting connectors or parts may be damaged Du Radiation fin thermistor Service Diagnosis SiBE061121 Troubleshooting Check No 01 Refer to P 121 Service Diagnosis D z CH GG pII Gh 00799 j LI In case of 9 US Troubleshooting AN Be sure to turn off the power switch before connecting or disconnecting Caution connectors or parts may be damaged Turn on the power again Error displayed again on remote controller Check No 01 Check the thermistor resistance value NO 3 error the discharge pipe temperature is YES lower than the heat exchanger temperature Cooling Outdoor heat exchanger temperature Heating Indoor heat exchanger temperature Check No 01 Check the indoor heat exchanger thermistor resistance value in the heating operation Indoor heat exchanger thermistor functioning
171. the unit it may cause a fire Check to see if the parts and wires are mounted and connected properly and if the connections at the soldered or crimped terminals are secure Improper installation and connections may cause excessive heat generation fire or an electrical shock If the installation platform or frame has corroded replace it Corroded installation platform or frame may cause the unit to fall resulting in injury Check the grounding and repair it if the equipment is not properly grounded Improper grounding may cause an electrical shock SiBE061121 Introduction Be sure to measure the insulation resistance after the repair and make sure that the resistance is 1 MQ or higher Faulty insulation may cause an electrical shock Be sure to check the drainage of the indoor unit after the repair Faulty drainage may cause the water to enter the room and wet the furniture and floor Do not tilt the unit when removing it The water inside the unit may spill and wet the furniture and floor Be sure to install the packing and seal on the installation frame properly For unitary type If the packing and seal are not installed properly water may enter the room and only 1 2 Used Icons wet the furniture and floor Icons are used to attract the attention of the reader to specific information The meaning of each icon is described in the table below Icon Type of Description Information Note A note provides informatio
172. the week ON OFF TIMER mode time and set temperature only for ON TIMER mode can be set with WEEKLY TIMER Other settings for ON TIMER are based on the settings just before the operation e Both WEEKLY TIMER and ON OFF TIMER operation cannot be used at the same time The ON OFF TIMER operation has priority if it is set while WEEKLY TIMER is still active The WEEKLY TIMER will go into standby state and ETM will disappear from the LCD When ON OFF TIMER is up the WEEKLY TIMER will automatically become active e Shutting the breaker off power failure and other similar events will render operation of the indoor unit s internal clock inaccurate Reset the clock CATER Operation Manual 64 Operation Manual SiBE061121 65 Copy mode e A reservation made once can be copied to another day of the week The whole reservation of the selected day of the week will be copied Program 1 Program 2 Pa 3 Geen 4 ON OFF Monday COP A Tuesday to Friday gd DD ON 508 B P ON 6 80 1 TUE E 0 1 Se 25 Te 46 30 Confirmation Normal Press __ 2 Press to confirm the day of the week to be copied Copy 3 Drees e The whole reservation of the selected day of the week will be copied 4 Press to select the destination day of the week Copy 5 Press e Be sure to direct the remote controller toward the indoor unit and check for a receiving tone and flashing t
173. to 28 C in cooling operation 20 C to 24 C in heating operation m For protection the system does not start for 3 minutes after it is turned off Detail ARC466 Series 1 Press the On Off button to turn on the system 2 Press the center of the Temp button and the Mode button at the same time 3 Select 7 trial operation with the Temp A or WV button 4 Press the Mode button to start the trial operation 5 Press the Mode button and select operation mode 6 Trial operation terminates in approx 30 minutes and switches into normal mode To quit a trial operation press the On Off button Sn ml On Off 2 4 5 COC 1 6 COC UC Weekly Ee Copy R14593 223 Trial Operation and Field Settings SiBE061121 Field Settings 4 Field Settings 4 1 When 2 Units are Installed in 1 Room Outline When 2 indoor units are installed in 1 room 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 1 Remove the front panel air filters and front grille 2 Remove the screw and remove the service cover O i Service cover R14629 3 Turn on the DIP switch S2W 1 on the service PCB R14630 Wireless Remote 1 Remove the cover and take it off Controller 2 Cut the address setting jumper
174. upplied or specified by Daikin Ask a qualified installer or contractor to install those parts and accessories Use of unauthorised parts and accessories or improper installation of parts and accessories can result in water or refrigerant leakage electrical shock fire or explosion Read the User s Manual 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 If the outdoor unit is to be installed close to the sea shore direct exposure to the sea breeze should be avoided If you need to install the outdoor unit close to the sea shore contact your local distributor Organization EE DAIKIN INDUSTRIES LTD EE renzo AIR CONDITIONING MANUFACTURING DIVISION oi de S EA THAILAND LTD IS NI ofthe Daikin Group s business Scope of Registration Scope of Registration 8 14001 8 facilities and subsidiaries in Japan THE DESIGN DEVELOPMENT AND MANUFACTURE OF THE DESIGN DEVELOPMENT 2 JAC e 7 certified under the ISO 14001 COMMERCIAL AIR CONDITIONING HEATING COOLING AND MANUFACTURE OF AIR A W I _ international standard for Deet REFRIGERATING EQUIPMENT HEATING EQUIPMENT
175. viewpoint of global environment protection do not discharge the refrigerant gas in the atmosphere Make sure to collect all the refrigerant gas Heat up the 2 brazed 215 Removal Procedure SiBE061121 Outdoor Unit RXG50K2V1B 3 8 Removal of Compressor Procedure AN Warning Be sure to wait for 10 minutes or more after turning off all power supplies before disassembling work ae procedure Pons 1 Remove the terminal cover WE A do E W A a eel ot 4 ee ER C7 4 a a LJ NW SEKR W tmnt coe V Ga 2 Disconnect the lead wires of the compressor Yellow V R12204 Removal Procedure 216 Outdoor Unit RXG50K2V1B SiBE061121 3 Release the clamp with pliers to detach the compressor lead wires 4 Remove the putty m Before working make sure that the refrigerant Procedure AP Warning Be careful not to get yourself burnt with the pipes and other parts that are heated by the gas brazing machine AP Warning If the refrigerant gas leaks during work ventilate the room If the refrigerant gas is exposed to flames toxic gas may be generated AP Warning Since it may happen that the refrigerant oil in the compressor catches fire prepare wet cloth so as to extinguish fire immediately AP Caution From the
176. with its maximum capacity air conditioner and other appliances are used at same time Running current and This diagram is a representation for illustrative power consumption purposes only Maximum during The maximum running current and power s Normal normal operation consumption of the air conditioner in ECONO EEn Cee POON eee Maximum during operation vary with the connecting outdoor ECONO operation Unit ECONO operation Time From start up until set temperature is reached E Notes on ECONO operation e ECONO operation can only be set when the unit is running Pressing causes the settings to be canceled and be A disappears from the LCD e ECONO operation is a function which enables efficient operation by limiting the power consumption of the outdoor unit operating frequency e ECONO operation functions in AUTO COOL DRY and HEAT operation This is not available in RADIANT and FAN operation e POWERFUL operation and ECONO operation cannot be used at the same time Priority is given to the function of whichever button is pressed last e If the level of power consumption is already low ECONO operation will not drop the power consumption 59 Operation Manual SiBE061121 Operation Manual 2 10 OFF TIMER Operation FF OFF TIMER Operation Timer functions are useful for automatically switching the air conditioner on or off at night or in the morning You can also use OFF TIME
177. work Step Procedure 1 Remove the main PCB SE m You can remove the main and the forced cooling GEO J PCB when you disconnect operation switch PCB ES NZ St the lead wires on the Feature of the main Y DA P terminal board without PCB A RL hl d removing the electrical box Main PCB Forced cooling operation switch PCB R13506 Remove the screw on the terminal board R11854 Release the 2 earth wires R11855 179 Removal Procedure SiBE061121 Outdoor Unit RXG25 35K2V1B Step Procedure 4 Pull out the forced i m Be careful of a sharp cooling operation Z gt protrusion at the back of the switch PCB S 1 forced cooling operation Disconnect the Q switch PCB connector S110 to remove the forced cooling operation switch PCB y H fa A D SA URI 2 Rt eum Forced cooling

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