air-conditioner ras-18ykh-e / ras-18yah-e ras-18ykh-a / ras
Contents
1. ON 1 aT gg F ON JOFFJOFFI ON on Set 0 temp 5 8 2156 ale 27 o c gt 6 as 5 E 2 5 6 a Fig 7 2 1 o 2 A cool operation is carried out when the indoor microcomputer sends the operation signal to the outdoor microcomputer 1 When the FAN is set to AUTO the indoor fan motor operates as shown in Fig 7 2 2 2 When the FAN is set to LOW MED or HIGH the indoor fan motor operates with a constant in volume as listed in Table 7 1 1 5 g E 41 5 6 41 0 According 5 to the set 0 5 position o 0 Set 0 5 temp RYO1 OFF Fig 7 2 2 3 Once the setting is made the operation mode is memorized in the microcomputer so that the same operation can be effected thereafter simply by pushing the START STOP button 7 2 1 Louver Control 1 By pushing the SET button of the remote control during the operation the louver can be set to the desired position And the louver position is stored in the micro computer the louvers will be set to the position automatically at the next operation 2 When the AUTO button is pushed the louver vertically swings within range of 25deg 29 7 3 HEAT Operation MODE of the remote control HEAT 1 Compressor 4 way valve outdoor fan and operation display are controlled as shown in Fig 7 3 1 F Room temp2. valve lL g Em l Fig 8 4 5 KEEP IMPORTANT 4 POINTS FOR PIPING WORK 1 Take awav dust and moisture Inside of the connecting pipes 2 Tight connection between pipes and unit 3 Evacuate the air in the connecting pipes using VACUUM PUMP 4 Check gas leak connected points he flare nut as far as possible with vour fingers Then ighten the nut with a spanner and torque wrench as shown in the figure lez dle Do not apply excess torque A mm Thickness Imperial mm 2 f 1 3 0 8 1 8 1 0 Die Pipe Tightening Connection Fig 8 4 3 Align the centers of the connecting pipes and tighten Otherwise the nut may crack depending on the conditions Packed Valve Handling Precautions Open the valve stem all the way out so not try to open it beyond the stopper Securely tighten the valve stem cap torque is as follows Gas pipes side 012 7 mm 49 Nem 5 0 kgf m Liquid pipe side 06 35 16 Nem 1 6 kgf m Hexagon wrench is required gt Flare nut 2 Q S Stopper 0 Valve bodv Lu Valve stem O Valve stem cap Fig 8 4 6 Connect and secure the power supply cord Stripping length of power cord 90mm 10mm Earth line NOTE Wire type 3 5 mm or Fig 8 4 8 more AWG 12 To plug the cable in the plug receptacle take the following precaut
3. Air inlet 7 A REN 4 x 212 x 18 for 98 10 anchor bolt 100 or more V 600 or more Air outlet ss COLOR IDENTIFICATION BROWN RED RED WHI WHITE VEL YELLOW BLU BLUE BLK BLACK GRV GRAV PNK PINK ORN ORANGE GRN 8 VEL GREEN amp ORANGE Switch parts CN16 1 2 21 3 WIRING DIAGRAM Thermal fuse 164 C Fan motor T F01 Fuse 5 250V TNR BLK R106 RED TO1 Transformer Lie Um gi Mis kog 09 MAIN BOARD MCC 1293 Indoor terminal block Outdoor terminal block 009 II Grand infrared rays terminal parts Thermal fuse Thetmo Heat exchanger parts 77C sensor senso L 4 Power supply 18YAH E 220 240V 50Hz 18YAH A 240V 50Hz ICN33 GRN 8 YEL BLK Discharge temperature sensor TD RED Chassis Schan er BLK sensor CE WHI RED GRY Crank case heater Fuse 28 2 5 WHIZ N PNK BLK N Coil for 4 way valve Compressor Fan motor 4
4. Pipe insulating material Polyethylene foam 6mm thick 1 Putty PVC tapes Each one about 100 mm in diameter and 300 350 mm long 8 3 Indoor Unit 8 3 1 Installation Place A place which provides the spaces around the indoor unit as shown in the above diagram A place where there is no obstacle near the air inlet and outlet A place which allows an easy installation of the piping to the outdoor unit A place which allows the front panel to be opened Direct sunlight to the indoor unit wireless receiver should be avoided The microprocessor in the indoor unit should not be too close to r f noise sources For details see the owner s manual Remote control A place where there are no obstacles such as a curtain that may block the signal from the indoor unit Do not install the remote control in a place exposed to direct sunlight or close to a heating source such as a stove Keep the remote control at least 1 m apart from the nearest TV set or stereo equipment This is necessary to prevent image disturbances or noise interference The location of the remote control should be determined as shown below 3 Side view Top view FT E 6 p gi S 5 5 Zm Indoor gt 3 7 3 35 4 Reception Remote range Remote range ontrol control Axial distance Fig 8 3 1 8 3 2 Installation Parts
5. jil 1 is subtracted from data before operation TEMP Q Down Example P 10 is subtracted from data before operation Example A AUTO LOUVER 4 A M Data before operation is directly transferred Example a _ SET LOUVER 981 Table 9 2 4 Block level Diagnosis function Air Check Block Symptom Conditioner Condition Judgment and action code status Indoor P C Indoor temp TA sensor is Operation Displayed when Check the indoor temp sensor TA board out of place continues error is detected 2 Check the indoor board Disconnection or short circuit Indoor temp TC sensor is Operation Displayed when 1 Check the indoor temp sensor TC out of place continues error is detected 2 Check the indoor P C board Disconnection or short circuit Trouble on indoor fan All off Displayed when 1 Check the connector circuit for Abnormal revolution speed of error is detected revolution speed input CN13 fan Check the indoor fan Check the indoor P C board Indoor unit or other part is Operation Displayed when Check the indoor P C board defective continues error is detected EEPROM and peripheral circuits EEPROM access error Outdoor temp sensor is out of All off Displayed when Check the outdoor temp sensor TE place error is detected 2 C
6. 8803 R91 D04 Orange Serial receive LED DO5 Green Serial send LED LED Fig 9 3 7 Dip switch and LED position Table 1 Table 2 gt Dip Check contents switch Check contents Normal operation Normal operation Timer short operation Protective operation Once 20 Power line protective circuit Protective operation Twice 1E Pipe sensor TD temp up protection 21 High pressure switch line circuit Check 18 and 19 See Table 2 gt Protective operation Three times Protective operation Four times Emergency stop 18 Heat exchanger TE circuit 19 Pipe sensor TD circuit e e 06800 Check 1E and 21 See Table 12 LED status Fast flashing Q Slow flashing Goes off 35 9 4 How to Check the Remote Control Including the Indoor P C Board There is no beep from the indoor unit Push the START STOP button The operation lamp of the air conditioner main Does the transmission NO indicator flash unit does not light Short circuit the metal terminal at the side of the YES battery compartment all clear terminal with a pencil wait about 10 seconds Is there direct sunlight on the receptor of the air conditioner Is operation possibl
7. 10kQ at 25 Case heater 240V 28W Magnetic switch FC2S Transformer FT67 220 240V Microcomputer TMP470840 Varistor R73 74 86 15G471K 470V Fuse FO1 T5A 250V 0 39m Connecting pipe 1 3 O D 12 7mm 5 REFRIGERANT CVCLE DIAGRAM INDOOR UNIT A RS Siege Note Ti heat Maximum pipe length is 15m Maximum pipe head is 6m Cooling 1 Gao 1 1 Heating E Connecting pipe m 0635 Cross flow fan O D 6 35 Packed valve Packed valve 012 7 06 35 Gas container connection Reinstall etc om Liquid tank Compressor PH280X3 4MS Capillarv tube Capillarv tube 21 7 x 600 21 2 x 7004 Outdoor heat exchanger Refrigerant R 22 1 45kg Cooling 4 Heating OUTDOOR UNIT Mark 4 means check points of Gas Leak Ambient temp Heating Standard Standard kg cm G 18YAH E A 21 0 Surface temp of heat exchanger interchanging pipe T1 C 18YKH E A 53 0 Fan speed indoor conditions DB WB Outdoor 7 6 Indoor High temperature 1 20 5 to 25 5 52 0 to 61 0 21 15 Low temperature 17 0 45 0 10 10 Standard 3 0 9 0 35 24 Cooling High temperat
8. When the installation plate is directiv mounted on the wall 1 Securely fit the installation plate onto the wall by screwing it in the upper and lower parts to hook up the indoor unit 2 To mount the installation plate on a concrete wall with anchor bolts utilize the anchor bolt holes as illustrated the above figure O x 3 Install the installation plate horizontally in the wall Fig 8 3 4 Failure to firmly install the unit may result in personal injury and property damage if the unit falls Installation plate Keep horizontal direction 1 Adjust the lateral position of the installation plate without changing the height so that each screw hole in the plate comes in the center of a pillar or stud 2 Make pilot holes with a bit to prevent the studs from cracking and then drive the screws into the holes and tighten When installing the installation plate with mounting screw do not use the anchor bolt hole Otherwise the unit may fall down and result in personal injury and property damage In the case of a reinforced concrete wall 1 In the selected area on the reinforced concrete wall bore holes at intervals of 450 mm and drive clip anchors or hole in anchors into them ary ol 2 Attach the installation plate to the wall by HA screwing bolts or nuts into the anchors Projection 022 15mm However in the case where hole in or less anchors are used the depth
9. 25 Replace sensor 09 Other cycle error 1 Does compressor operate Does compressor tune off halfway NO Doesn t inner over relay in compressor operate Check charged amount of refrigerant Check abnormal overload Trouble on compressor Is characteristic of TC sensor resistance value normal YES Refer to the Characteristic g Is circuit wiring I 1086 at 25 diagram VES Replace compressor NO Replace TC sensor Wiring check modification Replacement failure of outdoor P C board Indoor P C board check Replace Failure P C board Outdoor Failure P C board check Normal Isn t TC sensor disconnected from the sensing part YES Replace P C board Correct connection 09 Other cycle error 2 Does indoor fan operate YES Isn t filter clogged NO Is characteristic of TC sensor resistance value normal YES Is connection of connector normal i Clean filter NO Replace Refer to Characteristic diagram sensor 10kQ at 25 Freeze preventing operation Amount 1 45kg charged in factory Modify connection of connector Is condenser normal Is charged amount of refrigerant normal
10. Gas leak Miswiring of connecting wires of indoor outdoor units PEE ee Clogging of pipe and coming off of TC sensor Fig 9 3 5 9 3 4 How to Check the P C Board a Main P C board part Power relav indoor fan motor drive circuit and 1 Operating precautions EE control circuit C P U and peripheral circuits 1 When removing the front panel or the P C board be sure to disconnect the power plug from the AC outlet buzzer drive circuit and buzzer Infrared rays receive parts 2 When removing the P C board hold the edge Infrared rays receiving circuit of the P C board and do not apply force to the Display parts LED 3 When connecting or disconnecting the connectors on the P C board hold the whole housing Do not pull at the lead wire Switch P C board Wireless control TEMPORARY switch 2 Inspection procedures 1 When a PC board is judged to be failure check for disconnection burning or discol f oration of the copper foil pattern or this P C board 2 The P C board consists of the following 4 parts Procedure Disconnect the power plug from the AC outlet and remove the P C board assembly from the elec tronic parts base Remove the flat cable from the terminal plate e Buzzer P C board Buzzer Transformer Transformer P C board Check the defects of the P C board following the list below Referring to Table 9 3 1 3 Checking procedure
11. Set temp o z 2 Compressor 4 way valve Outdoor fan OPERATION displav Common relay Fig 7 3 1 2 A heat operation is carried out when the indoor microcomputer sends the operation signal to the outdoor microcomputer The indoor fan motor operates as shown in Fig 7 3 2 when the FAN is set to AUTO The motor operates with a constant air volume as listed in Table 7 1 1 when the FAN is set to LOW MED or HIGH RYO1 OFF FAN AUTO Manual Set 10 5 3 p 0 5 According to the set position 1 0 1 5 Room temp Set temp Fig 7 3 2 3 Once the setting is made the operation mode is memorized in the microcomputer so that the same operation can be effected thereafter simplv bv pushing the START STOP button 7 3 1 Louver Control 1 Bv pushing the SET button of the remote control during the operation the louver can be set to the desired position 2 When the AUTO button is pushed the louver verticallv swings within range of 25deg And the louver position is stored in the micro computer and at the next operation the louvers will be set to the stored position automaticallv at the next operation 7 3 2 Cool Airflow Control 1 If the indoor heat exchanger temperature detected by the indoor heat exchanger sensor is 16 or below the indoor fan stops and if the temperature rises to 26 or above the fan is
12. YES Replace condenser Addition of refrigerant Is indoor fan motor normal YES Is outside air YES Freeze preventing low load operation NO Indoor P C board check Replace Failure P C board Replace fan motor OC Indoor TA sensor error Is connection of 4 NO TA sensor connector normal2 VES Is characteristic of TA sensor NO resistance value normal YES Refer to Characteristic diagram 10kQ at 25 C Indoor P C board check Failure 00 Indoor TC sensor error Is connection of CNO5 NO sensor connector normal YES Is characteristic of TC sensor NO resistance value normal 10 25 YES Refer to Characteristic diagram Indoor P C board check Failure Is connection of TE sensor NO a o o um o o 3 o o o connector normal YES Is characteristic of TE sensor NO resistance value normal 10 at 25 YES Refer to Characteristic diagram Outdoor P C board check Failure Modify connection of connector Replace TA sensors Replace P C board Modify connection of connector Replace TC sensors Replace P C board Modify connection of connector Replace
13. on the rear protective circuit action can be done by turning bottom of the wireless remote control with a the remote control operation into service mode tip of pencil for more than 3 seconds Make operating the remote control observing the sure the operation mode display wind volume remote control indicators and checking whether display clock display and setting temperature TIMER lamp flashes 5 Hz display are turned on and of the clock display is flashing Note To perform this self diagnosis the remote Cautions when doing service 1 After completion of servicing always push the all clear ACL button to return the operation mode to the normal mode control with the service code of 43069666 is required 2 After completion of servicing by the check How to select remote control operation mode code turn off the power once and then turn on the power to reset memorized contents of 1 Selecting service mode cen the microcomputer to the initial status Push the switch button provided on rear bottom of the wireless remote control with a tip of pencil for more than 3 seconds Make sure the setting temperature is displayed on the display and other display is turned off All clear button Switch for selecting service mode Rear bottom cover Rear bottom of remote control Fig 9 2 1 200 Self diagnosis by check codes c Atthe same time also make sure the opera ti
14. put Watchdog timer output Switch board CPU Pin 28 Power source R S SER Transformer primary side Temp fuse Transformer secondarv side Light receiving unit Buzzer board Louver Fan revolution pulse input D Serial input LED Orange from outdoor 9 Serial output LED Green to outdoor B TA sensor input TC sensor input MMC 1275 ME 1275 Jap x ditti Hu fol SU ERA C E Osea i E as 183 9 3 6 Judgment bv LED Displav on Outdoor P C Board When the check code is checked at the outdoor unit side the following indications are available bv LED and Dip switch DSWO1 Table 9 3 3 LED displav and check code Dip switch 2 Vellow 3 Vellow 4 Vellow Timer short 20 Power line 1E Pipe sensor TD protective circuit temp up protection 21 High pressure switch line circuit Table 1 18 Heat exchanger sensor TE circuit 19 Heat exchanger sensor TL and pipe sensor TD circuit Protective operation frequencv of sensor circuit error When LED 1 to 4 is indicated with light in order the phase detect protection circuit operates regardless of setting of Dip switch Indication exchange e ON Dip switch SWO1 Schematic Diagram of id Olt v5 Outdoor Control Board 520 2025 OH 22 OW Ont 07
15. restarted Details are in 7 8 zd 7 4 AUTO Operation MODE of the remote control AUTO 1 One of the 3 modes Cooling Fan only and Heating is selected according to room tempera ture at which operation is to start as shown in Fig 7 4 1 The Fan mode will continue until room temperature reaches a level at which another mode is selected Set temp 43 Cooling mode 7 4 1 Temporary Auto When the TEMPORARY button is pushed the set temperature is fixed at 24 and controlled in accordance with the chart shown in Fig 7 4 1 The same cooling mode as the room temperature control is set at set temp 3 C 5 3 Heating mode The same heating mode as the room temperature control is set at set temp 43 C S Fig 7 4 1 7 5 ECONO 7 5 2 Heating When the ECONO button is pushed during COOL HEAT and AUTO operation the OPERATION displav is turned off and the ECONO display is lit and the indoor unit operates quietly and mildly with control ling airflow 7 5 1 Cooling 1 In the ECONO mode the set temp by the remote control is changed automatically as shown in Fig 7 5 1 2 Fan speed LOW is changed 2 Set temp is changed Pe Set temp 1H 2H TIME ECONO button is pushed Fig 7 5 1 1 1 In the ECONO mode the set temp by the remote control is changed automatically as shown in Fig 7 5 2 2 Fan
16. 264 _ g 450 pali o m gt m Hanger a Minimum distance Anchor bolt hole from ceiling 26 1 u o 1 o be 9 o fo o 0 lo o o o 0 t3 col oo Minimum distance ani RP J ty ANA 2 Minimum distance S from wall o o o o op 0 0 29 from wall 80 or more le 9 p 9 o 1 5 9 0 0 o o 99 130 or more Ca p X ps NLA 4 4 e 123 402 402 423 m T 1050 665 Center line Installation plate G Piping hole Piping hole 2 2 Outdoor Unit RAS 18VAH E RAS 18VAH A A 25 Drain outlet N oO 1 4 212 x 18 hole for 28 010 anchor bolt 23 310 2 Electric Parts cover e Liquid side Flare 26 35 Gas side Flare 915 88 Service port E 12 340 pitch 12 364 Handle Q Mounting dimension of anchor bolt A Detail Drawing 600 600 S Air inlet ir inle 100 or more M 4 600 or more vt e 212 x 18 hole tar
17. Do not store in a wet basement or expose to rain or water After unpacking the unit examine it carefully for possible damage If you detect any damage do not install the unit Contact your Toshiba dealer immediately Do not install in a place that can increase the vibration of the unit Do not install in a place that can amplify the noise level of the unit or where noise and discharged air might disturb user s neighbors To avoid personal injury be careful when handling parts with sharp edges Please read the installation manual carefully before installing the unit It contains further important instructions for proper installation 8 2 Installation Diagram of Indoor and Outdoor Units Anchor bolt arrangement of outdoor unit 600 mm Drain outlet Air outlet Secure the outdoor unit with the anchor bolts if the unit is likely to be exposed to a strong wind Use or 210 anchor bolts If itis necessary to drain the defrost water from the outdoor unit base pan attach the drain nipple to the outdoor unit before installing it The drain outlet is located as shown above Before installing the wireless remote control Air filters for both sides Clip anchor local part Mounting screw Purifving filter Wireless remote control 2 With the remote control cover opened load the supplied batteries correctly Cover observing t
18. Part with an asterisk x is packaged with outdoor unit Part Part No Name of parts Q ty No Name of parts Q ty Cmm o U i 6 Installation plate x 1 Mounting screw 4 25 x 8 8 000 e 25 Wireless remote control 1 Deodorizing filter x 1 0 e Remote control holder x 1 Purifying filter x 1 7 V Pan head wood screw Q3 161 2 Drain nipple 1 9 Others Owner s manual Batteries x 2 Installation manual 8 3 3 Cutting a Hole and Mounting Installation Plate Cutting a hole Refrigerant pipe hole Hooking section 265 100 d en co Center of pipe hole is located 47mm on the line indicated by the arrow and 100 mm apart from the pipe hole center line N Indoor unit outline Fig 8 3 2 When installing the refrigerant pipes from the rear Determine the pipe hole position using the installation plate and drill the pipe hole 065 mm slightly downward NOTE When using the drill to pierce the wall that contains a metal lath wire lath or metal plate be sure to use a pipe hole brim ring sold separately Mounting the installation plate For installation of the indoor unit use the paper pattern on the back 0 Installation _ 4808 indoor unit tin re 4 9 oc f t
19. SPECIFICATIONS OF ELECTRICAL PARTS 4 1 Indoor Unit RAS 18VKH E RAS 18VKH A Parts name Fan motor for indoor Specifications Output Rated 31W 2poles DC35V 19W AFP 220 31 4B Red Black White Black Winding resistance Q at 20 267 8 147 7 Thermo sensor TA sensor microprocessor 10kQ at 25 Transformer TO1 TTZ MCC 629 Microcomputer TMP87CK40AN Heat exchanger sensor TC sensor microprocessor 10kQ at 25 C Line filter LO1 25mH AC 0 7A Diode DBO1 KBPO6M Capacitor CO1 ECAIEHG222bE 220uF 25V Fuse FO1 MTS T5A 250V Varistor R98 R106 15G431K 430V 401 820 Louver motor 4 2 Outdoor Unit RAS 18VAH E RAS 18VAH A Parts name Compressor MP35EA7 Output Rated 2W 10poles 1phase DC12V Specifications Output Rated 2000W 2poles 1phase 220 240V 50Hz PH280X3 4MS Winding resistance 2 Red Black White Black at 20 1 35 2 68 Fan motor for outdoor Output Rated 65W 6poles 1phase 220 240V 50Hz MMF 230 65C Winding resistance 2 Red Black White Black at 20 C 71 2 139 0 Running capacitor for fan motor SK45FMP AC 450V 3 5uF Running capacitor for compressor SK42CMP45U1 AC 420V 45uF Solenoid coil for 4 way valve LB60012 AC 200 240V Thermo sensor TE TD
20. for the Operation of air conditioner When the breaker is turned on the OPERATION lamp on the setting indication part flashes control and maintenance of the air conditioner it is not a failure of the unit Table 9 1 1 Description The OPERATION lamp flashes indicating that power is turned on If this happens push the START STOP button once to cause the lamp to stop flashing A power outage also causes the lamp to flash Fan speed remains unchanged in the dry mode Fan speed is automatically controlled in the dry mode Room temperature is in the range under which the compressor is turned off but the compressor will not stop The compressor will not stop while the compressor on hold timer 3 minutes timer is actuated The compressor will not switch on or off even when the thermo control is operated in the dry operation In the dry mode the compressor goes on and off at regular intervals independent of the thermo control The PRE DEF lamp comes on when the heating operation is started The PRE DEF lamp comes on during defrost operation and when the indoor heat exchanger temperature is low when the heating operation is started Atthis time the indoor fan is stopped to prevent cold air from drifting into the room The outdoor fan stops once in the while during the heating operation When the indoor heat exchanger temperature is high the outdoor fan may be stopped by the high temperature
21. intake temperature and the discharge one is more than 8 C NOTE Three minutes protection feature A protection feature prevents the air conditioner from being activated for about 3 minutes when it is restarted immediately after operation O 9 Check the remote control operation when it is at fixed position When finished the check and test operation make sure to return the TEMPORARY switch to REMOTE CONTROL 10 Explain to the customer on the correct usage of air conditioner with simple layman s terms 8 4 Outdoor Unit 8 4 1 Installation Place A place which provides the spaces around the outdoor unit as required above in the diagram A dry sunny place If the place is exposed to direct sunlight use an awning for protection A place which can bear the weight of the outdoor unit and does not allow an increase in noise level and vibration A place where the operation noise and discharged air do not disturb your neighbors A place which is not exposed to a strong wind A place free of a leakage of combustible gases A place which does not block a passage When the outdoor unit is to be installed in an elevated position be sure to secure its feet A place where the drain water does not raise any problem An allowable length of the refrigerant piping is up to 15 m An allowable heat level is up to 6 m 1 2 Install the outdoor unit without anvthing blocking the air d
22. limit control operation Compressor does not work though room temperature is in the range of turning the compressor on Compressor does not work while the compressor restart delay 3 min timer is active The same is true after power is turned on as the time is still active During automatic operation the operation mode changes After selection of the cooling and heating operation the operation mode is selected again when the compressor off mode continues for 15 min according to the room tempera ture During automatic operation mode the fan only operation continues When the room temperature is within setting temperature 1 C the fan only mode is selected 20 9 2 Primarv Judgment of Trouble 9 2 2 Displav of Abnormalities and Sources Judgement of the Abnormal Spots The indoor unit of this machine observes the opera 921 Role of Indoor Unit Control tion condition of the air conditioner and displavs the The indoor unit controller receives the operation contents of the self diagnosis as block displavs on commands from the remote control and assumes the displav panel of the indoor unit the following functions Measurement of the draft air temperature of the indoor heat exchanger bv using the thermo sensor TA Louver motor control Control of the indoor fan motor operation Control of the LED displav Sends the operation signal to the outdoor micro computer Table 9 2 1 Block d
23. outdoor unit 4 screws 2 Connect the connecting cable to the terminal as identified with their respective matched numbers on the terminal block of indoor and outdoor unit 1 8 mm AWG 16 or more 3 When connecting the connecting cable to the outdoor unit terminal make a loop as shown installation diagram to prevent water coming in the outdoor unit 4 Insulate the unused cords conductors with strip the sheath of connecting cable to prevent the shortage or electric leakage Process them so that they do not touch any electrical or metal parts Stripping length of connecting cable Terminal 60mm bloc o k fomm Earth line ET Terminal o screw Rr 1 omm N d Connecting ia i JA 508 f Cord clamp Fig 8 4 10 CAUTION 1 Wrong wiring connection may cause some electrical parts burn out 2 Be sure to use the cord clamps and the electric parts cover to the specified positions with attached to the product Mount the electrical parts cover for cables of connecting section firmly with the screws Do not damage or scratch the conductive core and inner insulator of power supply and inter connecting cables when peeling them Be sure to comply with local cords on running the wire from indoor unit to outdoor unit size of wire and wiring method etc Wire type More than H05 RN F Use the power supply cord and inter
24. the specified position 6 Do not damage or scratch the conductive core amp inner insulator of power supply and inter connecting cables when peeling them 7 Do not deform or smash the surface of the cables Do not press or fix the cord and cables firmly with staples etc Installation wall plate How to connect the cable 1 Remove the side panel 2 screws Remove the electric parts cover and cord clamp 3 Insert the connecting cable fully into the terminal block and secure it by screw tightly Tightening torque 1 2 Nem 0 12 kgf m 4 Secure the con necting cable with How to open the screw cap the cord clamp Place your finger on the 5 Fix the electric lower part and push up to parts cover and open the screw cap side panel w Fig 8 3 7 Be sure to refer the wiring system diagram labeled inside the side panel Check local electrical codes and also any specific wiring instruction or limitation How to remove the front panel 6 amp Screws e f T X 1 2 1 2 1 2 Fig 8 3 8 1 Open the screw caps remove three front panel fixing screws 2 Put the screw caps back as thev were 3 Press the part saving PUSH on the air inlet grille to open the air inlet grille Remove three black front panel fixing screws 4 Close the air inlet grille 5 Manually open the vertical air flow louver dir
25. the front panel and the body will become wider spoiling the appearance Push Push Push j Fig 8 3 20 8 3 8 Gas Leak Test Check the flare nut connections valve stem cap connections and service cap connections for gas leak with a leak detector or soap water Electric parts Flare nut connections indoor unit Valve stem Flare nut cap connection connections Outdoor unit Service cap connection Fig 8 3 21 8 3 9 Check and Test Operation O 1 Check the unit is firmly hooked up on the installation plate 2 Check the connecting pipes tightened securely Confirm that there is no gas leakage Confirm that all connecting cables are secured and correct Check the pipe insulation Check the drainage Connection of the grounding wire To switch the TEST RUN COOL mode turn the switch on U w NOOR TEMPORARY REMOTE CONTROL AUTO TEST RUN sal COOL lI Fig 8 3 22 Make sure to return the TEMPORARY switch to REMOTE CONTROL Three minutes protection feature A protection feature prevents the air conditioner from being active for about 3 minuets when it is restarted immediatelv after operation O 8 Operate the unit at cooling operation mode for fifteen minutes or more Measure the temperature of the intake and discharge air Ensure the difference between the
26. the pipe Outer dia Tightening Additional Unit Nem mm torque tightening torque 6 35 16 1 6 kgfem 18 1 8 kgfem 12 7 49 5 0 kgfem 54 5 5 kgf m Half union o 08 nut Externally Lx Internally threaded side threaded side Use a wrench to secure Use a torque wrench to tighten Fig 8 4 4 8 4 3 Evacuating AIR PURGE Evacuate the air in the connecting pipes and in the indoor unit using vacuum pump Do not use the refrigerant in the outdoor unit For details see the manual of vacuum pump Use of vacuum pump 1 Connect the charge hose A from the manifold valve to the charge inlet of the gas side packed valve 2 Connect the charge hose B to the port of vacuum pump 3 Open fully the low pressure side handle of the manifold valve 4 Operate the vacuum pump 5 Close the low pressure side handle of manifold valve after evacuating and stop the vacuum pump Continue evacuating more than 15 minutes and check the pressure gage indicates 0 1 MPa 76 cm Hg 6 Open the stems of packed valves A and B1 all the way 7 Securely tighten the stem Low pressure side handle Manifold valve High pressure cap to each of the packed valve stems Outdoor unit Indoor unit Al Tu Charge Service port N hose B Gas H 9127 H o Bit Packed
27. Power factor 91 81 92 85 Indoor 0 28 0 30 0 28 0 30 Running current Outdoor 9 82 11 00 11 22 12 10 Starting current 60 Moisture removal 2 0 Indoor H M L 44 41 38 Noise Outdoor 55 57 56 Name of refrigerant R 22 Refrigerant Rated volume 1 45 Refrigerant control Capillarv tube Gas side size 12 7 Connection tvpe Flare connection Liquid side size mm 6 35 Interconnection pipe Connection tvpe Flare connection Maximum length of one way 2 m 15 Maximum height difference Indoor unit 1 Outdoor unit m 6 Codensate drain pipe Outer diameter INDOOR UNIT RAS 18YKH E RAS 18YKH A 298 Dimension 1050 180 Net weight 12 Evaporator type Finned tube Indoor fan type Cross flow fan High fan 750 Air volume Medium fan 650 Low fan 550 Fan motor output 31 Air filter OUTDOOR UNIT Polypropylene net filter Washable RAS 18YAH E RAS 18YAH A 690 Dimension 880 310 Net weight 65 Condenser type Finned tube Outdoor fan type Propeller Airflow volume 240V 3560 Fan motor output 65 Model PH280X3 4MS Compressor Output 2000 Safetv device Fuse overload relav Auto louver Ves 11 to 43 10 to 21 Usable outdoor te
28. TE sensors Replace P C board 18H ABR ABE 19 Outdoor TD sensor error Modifv connection of connector Replace Is connection of TD sensor NO connector normal2 VES Is characteristic of TD sensor NO resistance value normal YES e Refer to Characteristic diagram 4 and 5 10kQ at 25 C Outdoor P C board check Failure 1E Discharge temp error J Is protective control such as discharge thermostat normal YES Are wiring connector connection normal TL TD sensors Replace P C board Modify wiring connector connection Check and modify charged Is charged amount NO of refrigerant normal YES amount of refrigerant 1 45kg Make better delete the cause Isn t it abnormal VES overload NO Is characteristic of NO TD sensor resistance value normal e 10kQ at 25 C Outdoor P C board check Failure 28 Replace TD sensor Replace P C board 9 3 Troubleshooting Flowcharts 9 3 1 Power cannot be Turned on No Operation at AII Preliminary checks 1 Is the supply voltage normal 2 Is the connection to the AC output OK 3 Are the connection of the primary side and the secondary side of the power transformer inserted into the P C board 4 Is the FUSE F01 blown Turn the power off f
29. TO 5 BA FILE NO A00 0001 SERVICE MANUAL AIR CONDITIONER SPLIT WALL TYPE RAS 18YKH E RAS 18YAH E RAS 18YKH A RAS 18YAH A EN KA N ie AN CONTENTS 1 SPECIFICATIONS die a uii a d 3 2 CONSTRUCTION VIEWS iii ika ei 5 3 WIRING DIAGRAM 55 5555 5 5 5 355 8 4 48 5 958838 5 8 9569 88 88 7 4 SPECIFICATIONS OF ELECTRICAL PARTS 8 5 REFRIGERANT CYCLE DIAGRAM eene nennen 9 6 CONTROL BLOCK DIAGRAM 5 canon rna niin nna nei n sa man dana 10 7 OPERATION DESCRIPTION 5 05555 55 4 555455 595 323 325 559555965988 9888388888 555 5 12 8 INSTALLATION PROCEDURE 5 555545544 99995995 3933955955 69 16 9 TROUBLESHOOTING CHART iii i i mma ains 20 10 EXPLODED VIEWS AND PARTS LIST 37 1 SPECIFICATIONS RAS 18VKH E RAS 18VAH E RAS 18VKH A RAS 18VAH A Capacitv Cooling Heating 240V Cooling Heating 6 35 6 50 Power source Sin 220 240 Power consumption 2 03 2 20 2 33 2 52
30. Table 9 3 1 Check point Symptom Is the fuse blown Trouble cause Application of shock voltage Short circuit of the indoor fan motor Turn the power ON If the OPERATION lamp flash 0 5 sec ON 0 5 sec OFF steps 1 3 in the right column are not necessary Check power supply voltage 1 Between CN12 1 and 3 220 240 2 Between CNO1 1 and 3 12V AC 3 Between TP6 5V and 5V AC 4 Between TP7 12 and 12V DC Defective power cord power switch fuse or line filter or wrong wiring Defective power transformer Defective power circuit or short circuited load Same as 3 Thermal fuse operation Push the START STOP button once to set in operation mode Do not set to the fan only or on timer mode Check power supply voltage 1 Between terminals 2 and 3 2 Between terminals 1 and 2 Miswiring PF terminal is failure Start operation by using the antirestart timer 1 All LEDs of the OPERATION lamp the TIMER lamp PRE DEF lamp ECONO lamp and AUTO lamp light up 2 After 3 seconds normal display does not appear am do defect in the 9P Display is failure or housing assembly Procedure Check point Svmptom Trouble cause Push the START STOP button once 1 The compressor does not operate The temperature of the indoor to set in operation mode 2 The OPERATION lamp
31. connecting cable with specified thickness specified type and protective devices specified No wire should touch refrigerant piping compressor of any moving parts 9 TROUBLESHOOTING CHART 9 1 2 Incorrect Cable Connection between Indoor and Outdoor Units Troubleshooting Procedures Following details of What to be pre checked first make sure of the basic items The indoor unit is connected to the outdoor unit with 4 cables Make certain that the indoor and outdoor units have been connected properly with terminals assigned the same numbers wired to each other If the connectors are not connected as specified the outdoor unit will not operate normally or OPERA TION lamp and TIMER lamp will flash BHz 9 1 3 Misleading but Good Operations Program Controlled Operation When there is no trouble corresponding to above check in detail the faulty parts follow ing How to judge faulty parts by symptoms later 9 1 What to be Prechecked First 9 1 1 Power Supply Voltage The line voltage must be AC 220 240 RAS 18YKH E RAS 18YAH E 240V RAS 18YKH A RAS 18VAH A If the line voltage is not within this range this air conditioner may not work normally The microcomputer performs the operations listed in Table 9 1 1 to control the air conditioner If a claim is made on the operation check whether it corre sponds to the contents in the Table 9 1 1 If it does itis an indispensable operation
32. e Operation Displayed when 1 Check the four way valve System System continues error is detected 2 Check the indoor heat exchanger After cooling operation has sensor TC started the indoor heat 3 Check the indoor P C board exchanger temp rises After heating operation has started the indoor heat exchanger temp lowers Trouble on other cycle line Operation Displayed when Inner overload relay operation of After cooling heating continues error is detected compressor case thermostat operation has started the Electromagnetic contact OFF STOP indoor heat exchanger Indoor heat exchanger sensor sensing temp TC does not vary part out of place Check the indoor heat exchanger sensor TC Check the indoor P C board When the compressor stop Operation Displayed when 1 Check the charged amount of command is sent by freeze continues error is detected refrigerant gas preventing control Compres Gas shortage Sor stops Gas refilling gas leak check dowd fan Check the indoor fan Lock LOW Compressor break down All off Indicated when Check compressor ful detected If itis OK check PC board abnormal Ut LL t A RUM Contents detected by the check codes I 10 are stored in memory of the microcomputer even if the
33. e when the transmitter is moved nearer to the infrared signal receiver of the air conditioner Push the START YES STOP button Battery life Is there any thyristor fluorescent light near by NO NO Does the transmission indicator light Is operation NO possible when setting the temporary switch of the air conditioner main unit to TEST RUN or TEMPORARY AUTO YES Is there any beep and operation YES NO Can any signal tone be heard in a transistor radio when transmitting within 5cm distance from the radio YES NO LLLL P C board is failure conditioner away from thyristor Replace Replace the Normal fluorescent light P C board batteries Note After battery replacement shortcircuit the metal terminal at the side of the battery compartment all clear terminal with a pencil Remote control is failure Replace remote control Keep the air Avoid direct sunlight 36 10 EXPLODED VIEWS AND PARTS LIST 10 1 Indoor Unit 1 432 405 IS a Description Description 43061192 Base E Parts 43T60060 Cable Assembly 3P 43T69022 Board Assembly 43137002 P C Board Assembly Transformer MCC 602 Buzzer MCC460 43T61003 Base Display 43T69004 Sensor Heat Exchanger 43T60001 Terminal Block 2P 43T69005 Sensor Thermostat 43T60002 Terminal B
34. ectly below 6 Open the front panel lower portion until it comes in contact with the vertical air flow louver Lift up the front panel upper portion in a forward diagonal direction to unhook the clicks inside the front panel upper portion 7 After unhooking the nails inside the main unit upper portion rotate the front panel upper portion towards you to remove the front panel from the unit body Front panel Screw caps and screws Rear plate gt lt Electrical component box cover Ce Screws UM Cord clamp AI ex x gt 1 ES bushing Wiring cover Screw Fig 8 3 9 Stripping length of connecting cable 220 mm 10 mm 50 mm 60 mm Fig 8 3 10 NOTE Use standard wire only Wire type More than HO5 RN F 1 3 mm or more e Insert the connecting cable fully into the terminal block and secure it by screw tightly Tightening torque 1 2 Nem 12 kgfecm Secure the connecting cable with the cord clamp Fix the wiring cover rear plate bushing and front panel on the indoor unit Cord clamp Grounding wire Terminal block w Connecting cable Wiring cover Screw Fig 8 3 11 8 3 5 Piping and Drain Hose Installation Left hand connection with piping After scribing slits
35. f leftward piping and rear leftward piping bind the auxiliary pipes two only with facing tape Rear plate Fig 8 3 14 Auxiliary pipes Installation plate Carefully arrange pipes so that any pipe does not stick out of the rear plate of the indoor unit Carefully connect the auxiliary pipes and connecting pipes to each other and cut off the insulating tape wound on the connecting pipe to avoid double taping at the joint moreover seal the joint with the vinyl tape etc Since dewing results in a machine trouble make sure to insulate both the connecting pipes Use polyethylene foam as insulating material When bending a pipe carefully do it not to crush it 8 3 6 Indoor Unit Fixing 1 Pass the pipe through the hole in the wall and hook the indoor unit on the installation plate at the upper hooks 2 Swing the indoor unit to right and left to confirm that it is firmly hooked up on the installation plate 3 While pushing the indoor unit onto the wall by the lower part hook it up on the installation plate by the lower part Pull the indoor unit toward you by the lower part to confirm that it is firmly hooked up on the installation plate MEL Hook here 6 A 1 Installation IT x plate 1 Hook here m Fig 8 3 16 This air conditioner has the structure designed to drain water collected from dew which forms on the back of the indoor unit to the drain pan guide There
36. flashes heat exchange unit is ex 1 Setting the anti restart timer 2 Cooling operation Defective control P C board tremely low 3 Fan speed AUTO 4 Set the temperature sufficiently lower than the room temperature 5 Continuous operation Connect the motor connector to There is a voltage of 120V or more 1 Indoor fan motor is failure MOTOR and turn the power ON between the red and black motor Start operation as follows connector leads 1 Set the operation mode to FAN The motor does not rotate ONLY But the key operation of the remote Main P C board is failure 2 Set the fan speed to HIGH control is accepted Motor rotates but vibrates hard Contact of the motor connector is defective 3 Continuous operation Table 9 3 2 Approximate value of the sensor thermistor resistance TA TC kW Temperature 0c 10 20 C 25 C 30 C 9 3 5 How to Reduce the Operation Time of the Anti restart Timer Wireless remote control Drill 2 holes on the rear of the wireless remote control unit Attach the diode 181555 or equivalent to the rivet inside the unit Push the START STOP button to start operation with the diode attached 0 6 Timer short diode Fig 9 3 6 Indoor Printed Circuit Board P C B MMC 1293 5V power source transistor emitter pin 12V power source transistor emitter pin Reset input Pin 7
37. fore do not store the power cord and other parts at a height above the drain guide Wall Space for pipes Fig 8 3 17 8 3 7 Drainage 1 Run the drain hose sloping downwards NOTE Hole should be made at a slight downward slant to the outdoor side Do not rise the drain hose Do not form the drain hose into the waved shape UX AX x x TE A lo ET Do not put the Do not put the drain drain hose end hose end in the into water drainage ditch Fig 8 3 18 2 Put water in the drain pan and make sure that the water is drained out of doors 3 When connecting extension drain hose insulate the connecting part of extension drain hose with shield pipe Shield pipe IEEE Drain hose Inside the room Extension drain hose Fig 8 3 19 Arrange the drain pipe for proper drainage from the unit Improper drainage can result in dew dropping How to install the front panel on the indoor unit Install the front panel through the opposite order of How o remove the front panel When the panel is removed and mounted again take the ollowing action After fastening the 6 screws be sure to hook the inside clicks D and of the front panel shown in the diagram right gap is between the front panel and the rear plate If cooling dry operation is made without pushing the air outlet dew can be deposited on the front panel surface In addition a gap between
38. former FT 67 Terminal Block 4P Terminal Block 3P 30A Filter Clamp Protector Cord Protector Cord Clip Cable Bushing Bushing Cord Cover E Parts Nipple Drain P C Board Assembly MCC 1275 TOSHIBA CARRIER CORPORATION 336 TADEWARA FUJI SHI SHIZUOKA KEN 416 8521 JAPAN
39. heck the P C board Disconnection or short circuit Outdoor temp sensor is out of off Displayed when 1 Check the outdoor temp sensor TD place error is detected 2 Check the P C board Disconnection or short circuit Discharge temp error off Displayed when Check the refrigerating cycle Detection of discharge temp error is detected Gas leak over the set value Check the pipe sensor TD High pressure switch All off Displayed when Check the high pressure switch operation error is detected 2 Check the circuits of high pressure IOL operation Switch line Disconnection and contact failure of CNO04 connector Check the P C board Overload operation of the refrigerating cycle Cable Serial signal is not sent from Operation Displayed when 1 In case that the outdoor unit does not connection the outdoor unit to the indoor continues error is detected operate at all unit Check crossover wire Correct Miswiring of crossover wire miswiring Serial send circuit of the Check the outdoor P C board outdoor P C board is 2 In case that the outdoor unit operates defective normally Serial receive circuit of the While the outdoor send Serial LED Green indoor P C board is on the indoor P C board flashes If the defective receive Serial LED Orange Flashes Check the indoor P C board Does not flash Check the outdoor P C board Refrigerant Trouble on the four way valv
40. heir polaritv e500 Batteries 96 0 Parts name Refrigerant piping iqui 26 35 Liquid 26 Gas side 212 7 Each one Y SSG Installation plate 44mm or more Remote control holder Wireless remote control Vinyl tape Apply after carrying out a drainage test Saddle Extention drain hose Option RB 821SW During piping installation Y s Insert the remote control holder cushion between the indoor unit and wall and lift the indoor unit to make work easier E Do not allow the drain hose N to get slack Cut the piping hole sloped slightly Make sure to run the drain hose sloped A downward fhe auxiliary piping can be N connected to the left rear or down 5 Down Rear left Insulation of refrigerant pipes insulates the pipes separatelv not together 6 mm thick heat resisting polvethvlene foam Drainage N Drain Separatelv sold or pp market available drain hose Bottom plate Install the provided drain nipple in the hole of the bottom plate of the outdoor unit See figure at left Perform proper drainage processing using a separately sold or market available drain hose 16 mm inner diameter Do not use an ordinary hose available at the market since it tend to get flat 89 in a clog of drain water J Loop the connective cable
41. ion THIS APPLIANCE MUST BE EARTHED IMPORTANT L Brown N Blue Green and Yellow FOLLOWING CODE Fig 8 4 9 THE WIRES IN THIS MAINS LEAD ARE COLORED IN ACCORDANCE WITH THE LIVE NEUTRAL EARTH As the colors of the flexible cord of this appliance may not correspond with the colored markings to identify terminals in your plug as follows Connect BROWN colored core to plug terminal marked letter L Connect BLUE colored core to plug terminal marked letter N Connect GREEN and VELLOW colored core to plug terminal marked Earth symbol The installation of the cables has to be done in such a way that the basic insulated wires for the infrared sensor can not be touched Use the power supplv cord cables with thickness type and protective devices specified in the installation manual Prepare the interior power supply cord and cables wiring with current capacity sufficient for starting and usage of air conditioner Use standard wire only will cause an electrical fire or smoke Prepare the power source for exclusive use with the air conditioner This product can be connected to the mains Connection to fixed wiring A switch or circuit breaker which disconnects all poles and has a contect separation of at least 3 mm must be incorporated in the fixed wiring An approved short circuit breaker or switches must be used 8 4 5 Wiring Connection 1 Remove the electric parts cover from the
42. ischarging When the outdoor unit is installed in a place exposed alwavs to a strong wind like a coast or on a high story of a building secure the normal 8 4 4 Electrical Work How to connect the power cord For the air conditioner that has no power cord connect a power cord to it as mentioned below Remove the electric parts cover from the outdoor unit 4 screws After removing the electric parts cover remove the cord clamp Model RAS 18YAH E RAS 18YAH A RAS 18YKH E RAS 18YKH A Power source 50 Hz 220 240V 50 Hz 240V Maximum running current 16 8 Plug socket amp fuse rating 20 Wiring If incorrect incomple 3 5 mm AWG 12 or more e wiring is carried out it fan operation using a duct or a wind shield Specially in windy area install the unit to prevent the admission of wind Installation in the following places may result trouble Do not install the unit such places A place full of machine oil A saline place such as coast A place full of sulfide gas A place where high frequency waves are likely to be generated as from audio equipment welders and medical equipment Fig 8 4 1 8 4 2 Refrigerant Piping Connection Flaring 1 Cut the pipe with a pipe cutter Hae w Fig 8 4 2 2 Insert a flare nut into the pipe and flare
43. isplav Block displav OPERATION displav flashing 1 Hz Power failure when power is ON OPERATION displav flashing 5 Hz Thermo sensor TA short break OPERATION displav flashing 5 Hz Heat exchanger sensor TC short break OPERATION displav flashing 5 Hz Indoor fan lock abnormalitv of indoor fan OPERATION displav flashing 5 Hz Indoor P C board failure OPERATION and TIMER displav flashing 5 Hz Wrong wiring of connecting cable OPERATION TIMER and PRE DEF displav Gas shortage other refrigerant cycle trouble flashing 5 Hz Heat exchanger sensor open break short Overload relay or thermostat for compressor trouble OPERATION TIMER and PRE DEF display Cycle abnormal flashing 5 Hz 1 Judgement from defective operation or abnormal operation Table 9 2 2 Symptom Primary judgement No reaction on Turn off the power once turn it on Remote control is The indoor part including the remote control again and try to operate the remote not possible remote control is defective operation control again Remote control is OK possible The outdoor fan The compressor operates The outdoor part is defective does not rotate outdoor fan motor The compressor does not operate The inside part is defective 2 Self diagnosis with remote control 2 Selecting ordinarv mode With the indoor unit control self diagnosis of Push the all clear button ACL
44. lace the control P C board 9 3 3 Wiring Failure Interconnecting and Serial Signal Wire 1 Outdoor unit does not operate 1 Is the voltage between 2 and 3 of the indoor terminal block varied Confirm that transmission from indoor to outdoor is correctly performed based upon the following dia gram NOTE Measurement should be performed 2 minutes and 30 seconds after starting of the operation Be sure to prepare a diode for judgment Terminal block at indoor side Red O O S5277G or equivalent or J type S5277G Diode with rated voltage of 400V White 2 or more is acceptable D Terminal block Tester Fig 9 3 2 Normal time Voltage swings between DC15 and 60V Abnormal time Voltage does not vary 2 Outdoor unit stops in a little while after operation started Check procedure Select phenomena described below 1 The outdoor unit stops 10 to 20 minutes after operation started and 10 minutes or more are required to restart the unit Gas circulation amount is down Gas shortage Gas leak Measure gas pressure Pipe clogging Thermo operation of compressor Fig 9 3 3 2 If the unit stops once it does not operate until the power will be turned on again To item of Compressor does not operate Fig 9 3 4 3 The outdoor unit stops 10 minutes to 1 hour after operation started and an alarm is displayed Discharge temp error check code 03 1E Sensor temp error check code 02 1C
45. lock 3P 43T69056 Board Assembly 43T08105 Plate Switch MCC 1293 43T63020 Holder P C Board 43160041 Fuse Set Thermal 43T69021 Display Assembly LED 43T60059 Housing Assembly Secondary R 43793019 Rays 43T60058 Housing Assembiv Primarv 43760032 Lead Assembly Display 9P 43T62028 Sheet Switch 73T63021 P C Board Assembly Switch MCC 577 res Indoor Unit 2 43103009 43103003 43007181 43119015 43119016 43107019 43107013 43009535 43109030 43109031 43111002 43111001 43707010 43149033 43120013 43107012 43121026 43139001 N ES Ly ny a 7 X lt gt Description Panel Assembiv Front Bodv Back Assemblv Latch Plastic Bushing Body Right Bushing Body Left Arm Cap Screw Grille assembly Grille Grille Sub Pipe Shield Pipe Seald Bushing Holder Pipe Fan Cross Flow CJ952 Arm Grille Assembly Motor Fan AC200V240V 50Hz AFP 220 31 4B Band Motor Right 38 43139013 43139014 43144019 43147006 43147016 43122008 43119003 43162025 43163002 43169058 43170005 43070168 43180008 43119017 43182006 43185060 43080401 43080402 Description Band Motor Left Base Bearing Evaporator Pipe Deliverv Pipe Suction Bearing Holder Sensor Cover Electorical Parts Holder Remote Control Remote Control Hose Drain 3M Hose Drain Air Filte
46. mperature range 11 to 43 10 to 21 Specifications are subject to change without notice Note 1 Capacity is based on the following temperature conditions Condition JIS C9612 1994 Temperature Cooling Indoor unit inlet air temperature Heating Outdoor unit inlet air temperature Notes 2 CHARGELESS No additional refrigerant required This air conditioner accepts a connection piping length of up to 15m and a head of up to 6m There is no need to add the refrigerant as long as the total length of the connection piping is up to 15m 2 CONSTRUCTION VIEWS 2 1 Indoor Unit RAS 18YKH E RAS 18YKH A Indoor heat exchanger Dust collecting filter Air filter Deodorizing filter Air inlet 180 298 lt 24 Power cord 1 7m Ie 8 w 0 z NN Air Front panel Rear plate Wireless remote control Remote control holder ll Se U i 1 7777 E un 7741 59 6 Drain hose Hanger 0 60m Auxiliarv pipe 0 39m Auxiliary pipe 0 49m Flare 912 7 Flare 06 35 Detail of installing dimensions of the indoor unit 30 990 30 L 274 E
47. nit ON OFF Signal Compressor ON OFF Signal Outdoor Fan ON OFF Signal Compressor Control Serial Signal 4 Way Valve Control Transmitter Receiver Outdoor Fan Control Defrost Operation Serial Signal Communication Relav 4 Wav RWOL Relav Driver Relay Magnetic RYO7 Switch Compressor Outdoor Fan Motor Photo Coupler pa P Initializing Circuit Soph for Indoor Unit Clock frequency Oscillator Circuit 6MHz Power Supply Circuit RAS 18YAH E AC220 240V 50Hz RAS 18YAH A AC240V 50Hz 100pinQ c 9 7 OPERATION DESCRIPTION 7 1 FAN ONLY Operation MODE of the remote control FAN ONLY 1 Fan speed setting 1 When the FAN is set to AUTO the indoor fan motor operates as shown in Fig 7 1 1 2 When the FAN is set to LOW MED or HIGH the indoor fan motor operates with a constant in volume as listed in Table 7 1 1 Room temp Fig 7 1 1 Auto setting of air volume Table 7 1 1 Manual setting of FAN SPEED Indication of HIGH Air volume FAN SPEED m h 2 Once the setting is made the operation mode is memorized in the microcomputer so that the same operation can be effected thereafter simply by pushing the START STOP button 7 2 COOL Operation MODE of the remote control COOL 1 Compressor 4 way valve outdoor fan and operation display are controlled as shown in Fig 7 2 1
48. of the holes should be adjusted so that the nut heads extend no more than 15 mm Fig 8 3 5 There may be a wire conduit embedded in the wall Confirm on the blue prints or ask the builder Install the installation plate using 4 to 8 pieces of mounting screw securing four corners with screws Make sure of the proper installation of the installation plate before mounting the indoor unit Hole in anchor Installation plate Hole in anchor Nut with threaded hole 8 mm dia Bolt Less than 15 mm wall Fig 8 3 6 In the case of the pipe on the back Using the pattern position the pipe hole and bore the hole slightly downward 8 3 4 Electrical Work Important items of indoor unit wiring 1 For electrical works the wiring and cables must be performed in compliance with national wiring standard or regulation If incorrect and incomplete wiring is carried out it will cause an electrical fire or electrical shock 2 Do not use the inter connecting cable Never execute the connection of electrical wiring with other method than the approved one exp use the terminal block etc 3 Prepare the interior power supply cord capacity sufficient for starting and usage current of air conditioner 4 Connect the connecting cable to the terminal as identified with their respective matched numbers on the terminal block of outdoor unit 5 Fix the cable securely with the cord clamps to
49. of the rear panel by a knife or a marking off pin cut them by a pair of nippers or the like A Slit rear panel Fig 8 3 12 Bend the connecting pipe so that it is laid within 52 mm above the wall surface If the connecting pipe is laid exceeding 52 mm above the wall surface the indoor unit may unstably be set on the wall When bending the connecting pipe make sure to use spring bender so as not to crush the pipe Bend the connecting pipe within a radius of 40 mm NOTE If the pipe is bent incorrectly the indoor unit would be unstably set on the wall and the air conditioner might be raised 1 When the piping runs to the left remove the left side body bushing of the rear panel You may need the body bushing when you relocate the unit so be sure to make customer keep it in a safe place 2 After passing the connecting pipe through the pipe hole connect the connecting pipe to the auxiliary pipes and wrap facing tape around them Outward form of indoor unit R 40mm Use polisin polyethylene core Nor the like for bending pipe H Y 7 Use the handle of screwdriver etc Fig 8 3 13 152 fam Underside connection with piping 1 Cut out the knock out piece from the right below of the rear plate with a knife etc Smooth the cut edges Pipe holder Bind the auxiliary pipes two and connecting cable with facing tape tightly In case o
50. on lamp is also flashing This shows that 1 The self diagnosis by the check codes is con Pam the protection circuit on the indoor P C board ducted under the block displays of item B H in Table 9 2 1 is working 2 Remote control key operation under the service d Operate the TEMP B kev and make sure mode 1 the remote control display shows f and EU basal te kd Sanh key operation 8 flashing of the operation lamp If the opera ras b number is tion lamp is flashing it shows the protection FRS QI circuits for connecting cable is working or 8 The self diagnosis by the check codes is con thermal fuse is blown ducted with procedures shown below In the same way operate the TEMP A a Enter the service mode and make sure the off timer displav of the remote control shows key so that the display is increased one by one to continue checks by the self diagnosis 17197 as shown in the next table From upto b Operate the ON OFF key and make sure n A the timer lamp on the display section is Check operations of protection circuits flashing 5 Hz for each block and 14 to iF check operations of the typical protection circuits nn iL Table 9 2 3 Operating key Indication after operation ON OFF _ 1 is added to data before operation CS Up Example 4
51. or about 5 seconds and then turn it on again Does the OPERATION Does operation start lamp flash of the remote control NO ES NO Y NO Infrared rays receive parts or P C board failure 2 Is 50Hz 220 240V AC supplied to the primary side of the power source transformer NO YES Refer to the figure below Is 12V AC supplied to the secondary side of the power transformer NO YES Refer to the figure below Is the voltage display on the rearN YES panel of the P C board normal 12V DC or 5V DC NO 12V DC 5V DC power supply circuit failure when you push the ON OFF button Does the transmission indicator of theN NO remote control flash normally and is the transmission really performed Is the lead wire disconnected from YES the infrared rays receive parts Refer to above Preliminary checks Or there is a defect before the power transformer Power transformer is failure Microcomputer is failure Operations Check items Probable main causes Remedies Item by symptoms Normal Remote control failure Replace Connect the wire properly Replace Replace transformer Replace the P C board Replace the 3801 C01 Q03 001 Q01 Q02 ICO3 Primary side P C board Secondary side CN32 CN33 T
52. or heat exchange sensor TE Defrost lowers by the set degree less than the temperature detected at start time the operation enters the defrost operation In this time the 4 way valve relay and the outdoor fan are turned off The indoor fan is turned off by the cool air blow out preventing control of the indoor microcomputer at the indoor side and PRE DEF on the remote control goes on The defrost operation is automatically reset to the normal operation when the temperature detected by the above mentioned TE sensor rises up to the set value or when Max 12 minutes of the operation time has passed 5 2 8 INSTALLATION PROCEDURE 8 1 Safetv Cautions For general public use Power supply cord of parts of appliance for outdoor use shall be more than polychloroprene sheathed flexible cord design HO5 RN F or cord designation 245 IEC 57 6718181911 To Disconnect the Appliance from the Mains Supply This appliance must be connected to the mains by means of a circuit breaker or a switch with a contact separation of at least 3 mm If this is not possible a power supply plug with earth must be used This plug must be easily accessible after installation The plug must be disconnected from the power supply socket in order to disconnect the appliance completely from the mains REQUIREMENT OF REPORT TO THE LOCAL POWER SUPPLIER Please make sure certainly that the installation of this air conditioner will be reported to the local powe
53. power supply is turned off Therefore contents of operations in the past are all displayed 24 Details of Table 9 2 2 Judgment of Trouble by Every Symptom 04 Serial signal error Does outdoor NO unit operate YES Correct crossover wires Are 1 2 and 3 crossover NNO wires normal YES Is connection of NO Correct connection connector normal YES Does LED Orange on NO outdoor P C board flash YES Does LED Orange on indoor P C board flash NO Does LED Green on outdoor P C board flash YES 08 Four way valve error Is operation of NO four way valve normal YES Satisfied Has coil terminal 220 240V in heating Unsatisfied NO Y Check indoor P C board Failure ili of connector Check outdoor P C board Failure Replace P C board Replace P C board Four way valve check Failure Replace Circuit check modification Are circuit wires normal YES Outdoor P C board check YES Is characteristic of TC sensor resistance value normal YES Refer to the Characteristic diagram 10kQ at 25 Replace P C board Outdoor P C board check Failure CN11 220 240V Replace Indoor P C board check i P C board Failure
54. r Frame Main Plate Assembly Installation Owner s Manual Frame A Filter Frame B Filter 10 2 Outdoor Unit 27 26 401 31 32 35 E yy gt AN 2 43T00024 43T00025 43T00026 43T42002 43119012 43119011 43191001 43142005 43115001 43143023 43T46027 43146016 43147020 43147018 43747007 43747014 43146482 43746005 43141301 43749011 43749012 43749019 43121013 CT AR 44 2 22 31 32 28 33 34 Description Panel Air Outlet Panel Front Panel Side Base Assembly Guard Fin Guard Fan Plate Roof Plate Valve Packed Handle Condenser Assembly Valve Packed 12 7 Valve Packed 6 35 Bonnet Bonnet Tube Capillary 1 2DIA Tube Capillary 1 7DIA Valve 4 Way Valve Checked Compressor PH280X3 4MS Base Spring A Base Spring B Spring Buffer Motor Fan AC220 240V 50Hz 2 43720010 43746018 43169059 43169060 43152004 43157238 43193065 43160071 43160029 43155021 43155014 43158008 43160035 43160036 43160037 43762014 43162015 43196003 43196001 43196004 43162013 43179004 43169057 we Description Fan Propeller 490 Coil 4 Way AC220 240V LB6 Sensor Sensor TD Switch Magnet FC 2S Heater Crank case Spring Fuse Fuse Set 30A 250V Capacitor 45MFD 420V Capacitor 3 5MFD 450V Trans
55. r supplier before installation If you have any obscure problems or if the power supplier does not accept the installation of this appliance service agency will take adequate countermeasures FOR USE BY QUALIFIED PERSONS ONLY TURN OFF MAIN POWER SUPPLY BEFORE ATTEMPTING ANY ELECTRICAL WORK MAKE SURE ALL POWER SWITCHES ARE OFF FAILURE TO DO SO MAY CAUSE ELECTRIC SHOCK CONNECT THE CONNECTING CABLE CORRECTLY IF THE CONNECTING CABLE IS CONNECTED BY WRONG WAY ELECTRIC PARTS MAY BE DAMAGED CHECK THE EARTH WIRE IS NOT BROKEN OR DISCONNECTED BEFORE INSTALLATION DO NOT INSTALL NEAR CONCENTRATIONS OF COMBUSTIBLE GAS OR GAS VAPORS FAILURE TO FOLLOW THIS INSTRUCTION CAN RESULT IN FIRE OR EXPLOSION TO PREVENT OVERHEATING THE INDOOR UNIT AND CAUSING A FIRE HAZARD PLACE THE UNIT WELL AWAY MORE THAN 2M FROM HEAT SOURCES SUCH AS RADIATORS HEAT REGISTORS FURNACE STOVES ETC Never modify this unit by removing any of the safety guards or by by passing any of the safety interlock switches Do not install in a place which cannot bear the weight of the unit Personal injury and property damage can result if the unit falls Before doing the electrical work attach an approved plug to the power supply cord And make sure the equipment to be earthed Appliance shall be installed in accordance with national wiring regulations Exposure of unit to water or other moisture before installation will result in an electrical short
56. ransformer P C board MCC 629 CN12 Main P C board MCC 1293 CNO1 Fig 9 3 1 Power transformer connection diagram 29 9 3 2 Only the Indoor Fan does not Operate Preliminary checks 2 Does it neither work in COOL or FAN ONLY operation Checking procedure gt Turn OFF the power REMOTE CONTROL position Turn ON the power REMOTE CONTROL position Does the fan stop at the NO operation stop condition Control P C board failure YES Start operation at HIGH cooling NO Does 120V AC or higher NO Does the fan rotate voltage apply to between red and black lead of the motor YES YES Turn OFF the power Change the setting Is it possible to rotate the NO to LOW cooling cross flow fan by hand YES Turn ON the power Does the rotating speed NO Stop the of the fan lower operation YES When rotating the cross flow fan by hand at the operation stop condition is the rotation signal 12VDC lt gt 0V detected between 2 gray lead and 3 brown lead of the motor connector PJ13 or CN13 1 pulse 1 revolution Motor circuit 003 QO6 1 01 or 12V power circuit 003 001 failure Normal 30 Replace the P C board Motor control circuit failure ICO1 05 DO4 or 12V power circuit QO3 DO1 or thermal fuse failure Repair the cross flow fan Replace the fan motor Rep
57. speed LOW ECONO button is pushed OH 1H 2H TIME Set temp is changed Set temp is changed Set temp Fig 7 5 2 ea 7 6 High Temperature Limit Control Heating Operation The microprocessor detects the indoor heat ex changer temperature so as to prevent exceeding the condensate pressure Control is performed as shown in Fig 7 6 1 Heat exchanger temperature 60 Compressor Outdoor fan 54 52 p Only outdoor fan is turned off Fig 7 6 1 7 7 Low Temperature Limit Control Cooling Operation The microprocessor detects the indoor heat ex changer temperature so as to prevent freezing up the indoor heat exchanger Control is performed as shown in Fig 7 7 1 Heat exchanger temperature Outdoor fan Less than 2 C continues for 6 minutes Fig 7 7 1 7 8 Cool Airflow Prevention Control Heating Operation 1 During the heating operation the indoor fan speed is controlled automatically in accordance with the indoor heat exchanger temperature to prevent blowing the cool air Control is performed as shown in Fig 7 8 1 Heat exchanger temperature 30 26 Indoor fan speed According to the 20 set position 16 Fig 7 8 1 2 As soon as the defrost operation starts the indoor fan stops 7 9 Defrost Operation During heat operation if the temperature Evaporat ing temperature detected by the outdo
58. ure 3 5 11 0 43 26 Note Low temperature 2 5 1 5 21 15 Measure the heat exchanger temperature at the center of U bend By means of TC sensor 1 9 During heating overload the high temperature limit control operation is included Heat Exchanger Sensor Temperature Sensor Infrared Ravs Signal Receiver CLOCK FREQUENCY 36 864kHz Remote Control Operation START STOP Operation Mode Selection AUTO COOL DRY FAN ONLY Thermo Setting Fan Speed Selection ON TIMER Setting OFF TIMER Setting Louver AUTO Swing Louver Direction Setting ECONO Functions Louver Control Infrared Rays j Initializing Circuit Clock Frequency Oscillator Circuit 8MHz Power Supply Circuit Timer Processing Temperature Processing 3 minute Delay at Restart for Compressor Motor Revolution Control Serial Signal Communication o Triac e Filter From Outdoor Unit Transformer Louver ON OFF Signal Louver Driver Serial Signal Transmitter Receiver Serial Signal Communication Operation Display Timer Display ECONO Sign Display PRE DEF Sign Display Indoor Fan Motor Louver Motor outdoor unit L 9 400891 32018 TOHLNOD 9 Discharge 4 Way Valve Temperature Sensor TE Heat Exchanger Sensor Serial Signal Communication Indoor U
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