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1. Technical Information 11 6 Function and Control Service Manual 6 1 Remote Controller Introduction Buttons on Remote Controller Introduction for Icons on Display Screen 12 F E Es F E E eu START STOP Press to start stop operation Press to decrease temperature setting A Press to increase temperature setting FAN AUTO Press to set fan speed MODE Press to select operation mode AUTO COOL DRY FAN HEAT SENSOR CLOCK Press it set clock TIMER ON Press it to set auto on timer AIR SWEEP Press it set swing angle EXTEND TEMP TIMER OFF Press it to set auto off timer TURBO SLEEP LIGHT Press it to turn on off the light MODE icon If MODE button is pressed current operation mode icon AUTO COOL DRY FAN or XX HEAT only for heat pump models will show SLEEP icon amp is displayed by pressing the SLEEP button Press this button again to clear the display TEMP icon Pressing TEMP button 2 set temperature indoor ambient temperature 4 outdoor am
2. 45 50 25 30 35 40 20 15 110 115 105 90 Outdoor temp F Outdoor temp F Technical Information Service Manual 2 4 Cooling and Heating Data Sheet in Rated Frequency Cooling Rated cooling Pressure of gas pipe Inlet and outlet pipe condition F connecting indoor and temperature of heat DB WB outdoor unit exchanger indoor unit outdoor unit Indoor Outdoor MPa Indoor Outdoor P MP ne Re Compressor frequency Hz 54 to 57 106 to 109 Super High High 80 67 0 8 1 1 MWM12Y1J 50 to 54 109 to 113 Super High High 77 MRM12Y1J Rated heating Pressure of gas pipe Inlet and outlet pipe condition F connecting indoor and temperature of heat Fan speed of Fan speed of DB WB outdoor unit exchanger indoor unit outdoor unit Pma Tr Heating Compressor L MWMO9Y1J 70 60 47 43 37 38 i7to14 321037 Super High Instruction T1 Inlet and outlet pipe temperature of evaporator T2 Inlet and outlet pipe temperature of condenser P Pressure at the side of big valve Connection pipe length 24 6ft 2 5 Noise Curve Indoor side noise when blowing Outdoor side noise when blowing 60 60 50 W UU 50 lt 40 lt 5 g 90 9 40 9 20 30 10 0 20 low Middle High Super High 0 20 40 60 80 100 Indoor Fan
3. 806 824 842 878 89 6 914 2 355 100 4 E EE 152 6 154 4 156 2 158 159 8 161 6 163 4 165 2 167 168 8 170 6 3 998 3 861 3 729 3 603 3 481 3 364 3 252 3 144 3 04 2 94 2 844 2 752 56 19 107 6 177 8 2 415 53 46 109 4 179 6 2 339 8 8 50 87 111 2 181 4 2 265 251 6 48 42 113 183 2 2 194 253 4 46 11 114 8 185 2 125 2552 43 92 116 6 186 8 2 059 41 84 118 4 188 6 1 996 39 87 120 2 190 4 1 934 260 6 38 01 122 192 2 1 875 262 4 36 24 123 8 194 1 818 2542 34 57 125 6 195 8 1 736 32 98 127 4 197 6 1 71 267 8 31 47 129 2 199 4 1 658 269 6 131 201 2 1 609 271 4 132 4 5 1 561 2732 134 6 1 515 136 4 1 47 30 04 28 68 27 39 26 17 8 206 6 B ae Installation and Maintenance 73 Service Manual Resistance Table of Discharge Temperature Sensor for Outdoor 50K Temp F Resistance kQ Temp F Resistance xO Temp CF Resistance kO Temp F Resistance 202 sss s 102 1534 941 474 84 7908 518 oa 12 192 4 amp 9 36s 536 so 1238 1699 19 amo 48 708 sa 1256 16 1958 4334 608 52 8155 1274 4575 1978 7424 2 608 s ns 192 1517 194 409 oa sos 608 me 2012 3 se 589 66 ms mm mo
4. 12 14 16 Electric Box Assy 6970034 69700355 1 Electric Cover Sub Assy 6970036 1 69700356 1 Shield Cover 69700357 6970037 1 69700358 69700358 1 26 Stepping Motor 69700359 69700359 1 27 Indicator Shield Cover 697023 6970023 1 28 Indicator Light Cover 6970024 6970024 1 Display Board 6970025 7 697029 1 30 _ Electric Box Sub Assy 69700365 6970030 1 699094 69700361 1 32 TeminalBoard 69700130 69700130 1 Remote Controller 69700313 6970093 1 34 Temperature Sensor 68700362 69032 1 356 Temperature Sensor 697003638 69709 1 Above data is subject to change without notice 6 20 21 22 23 20 21 22 23 4 2 N N gt e 2x Installation and Maintenance Service Manual 10 2 Outdoor Unit MRMO9Y1J MRM12Y1J OU CO rm sO LD moja lt Installation and Maintenance 58 Service Manual No escription MRMO9Y1J MRM12Y1J 5 Chassis Sub assy 69700270 69700270 1 6 Drainage Connecter 69700164 69700164 1 7 Compressor Gasket 69700284 69700284 1 8 Co
5. 60 11 2 Removal Procedure of Outdoor Unit Y 66 Appendix S SSS S 70 Appendix 1 Reference Sheet of Celsius and Fahrenheit 70 Appendix 2 Configuration of Connection 70 Appendix 3 Pipe Expanding Method a 71 Appendix 4 List of Resistance for Temperature Sensor 72 Table of Contents Service Manual Part Technical Information 1 Summary Indoor Unit 19 MWM12Y1J Outdoor Unit MRMO9Y 1 MRM12Y1J Remote Controller YT1FF MOTO2 Technical Information Service Manual 2 Specifications 2 1 Specification Sheet MRMO9Y 1J MRM12Y1J Power sos Rated Frequency 8 9 PowrSupyMoe Or Cooling Capacity Min Max Heating Capacity Min Max 9800 2500 11000 13000 3400 13500 Cooling Power Input Min Max 750 220 1100 1260 260 1340 Heating Power Input w 830 230 1230 1320 250 1360 Cooling Power Curent Rated Input 1230 Air Flow Volume SH H M L SL Pini Bui 2 2 5 1 14 4 21 5 19 14 28 7
6. 21 T Notes for Installation and 21 8 23 8 1 Installation Dimension DI8grar du cela eeu Deme 23 8 2 Installation Parts checking T 25 8 3 Selection of Installation Location 25 8 4 Electric Connection Requirement no ign kt vada 25 Rad OM Ol nee d P rS 25 8 6 Installation of Outdoor MUI RUMINUS 27 8 7 Vacuum Pumping and Leak Detection 29 8 8 Check after Installation and Test Operation 29 Table of Contents Service Manual 9 Maintenance senes 30 9 1 Error a 30 9 2 Troubleshooting for Main Malfunction 38 9 3 2 3 way Valve 444 47 9 4 Troubleshooting for Normal Malfunction sauna bk nuntur 54 10 Exploded View and Parts 56 10 1 oes ak hl mE 56 jS s mD TINI 58 11 Removal Procedure 60 11 1 Removal Procedure of Intdoor Unit
7. Start it 3 min later to wiring diagram Y Replace parts of outdoor electric box Remove the error 10 Diagnosis of losing synchronism for compressor Main detection points Is pressure of the system too high 5 voltage too low Malfunction diagnosis process Losing synchronism upon startup of the unit Is the stop time of compressor more than 3min Is wire of compressor well connected Adjust t lt connecting wire of outdoor electric box Replace compressor Installation and Maintenance Is fan well Is outdoor fan normal N Y stuff N Reliable connected Is outdoor fan blocked by stuff Replace parts of outdoor electric box Replace parts of outdoor electric box I Y Remove error Replace outdoor fan Replace compressor 45 46 11 Diagnosis of overload and discharge malfunction Main detection points Is electric expansion valve well connected Is it damaged Is refrigerant leaked Is overload wire connection normal Malfunction diagnosis process 20min after de energization of complete unit Is electric expansion valve well connected Is overload wire reliably connected Replace electr
8. Fan Motor Heating Speed SH H M L SL r min 1300 1150 980 820 1350 1200 1000 850 Output of Fan Motor W 15 1 Fan Motor Capacitor uF 4 W Row fin Gap Swing Motor Model MP24BA MP24BA BA ound Power Level SH H M L SL dB A 51 47145 42 53 49 45 42 Dimension WXHXD 30 1 3X11 1 7X8 30 1 3X11 1 7X8 z 5 5 4 6 Input of Heater w 7 Evaporator Form Aluminum Tube Aluminum Fin copper Tube A Dimension of Carton Box LXWXH 33 2 9X13 1 2X10 2 7 33 2 9 13 1 2 10 2 7 Dimension of Package LXWXH 33 1 3X13 4 7X10 6 7 33 1 3X13 4 7X10 6 7 x b m9 9 Ib 1 Gross Weight 23 23 2 Technical Information Service Manual Model of Outdoor Unit u MRM09Y1J MRM12Y1J Product Code CB146W0431_L13396 CB146W0451_L13396 ZHUHAI LANDA COMPRESSOR ZHUHAI LANDA COMPRESSOR CO LTD CO LTD CompesorMode O AOE Compressor OO Compressor T 6 6 j Overload Protector 1NTHL 2383 1 111 6233 Throttling Method L Electron expansion valve Electron expansion valve F Ambient temp cooling F 64 113 64 113 Ambient temp heating F 5 75 5 75 Condenser Form Aluminum Fin copper Tube Aluminum Fin copper Tube Rows fin Gap 2 1 18 2 1 18 29 8 11X1X19 8 17 29 8 11X1X19 8 17 Compressor Manufacturer Trademark Fan Motor Speed mm 90 Outdoor Output of Fan Mot
9. Service Manual Models MWMO9Y 1 J MRMO9Y 1 MWM12Y1J MRM12Y1J Refrigerant R410A Service Manual Table of Contents Part Technical 2 22 22 1 1 Summary 2 1 2 Specifications 2 FANE pasasaq asss 2 2 2 Operation Characteristic Curve 4 2 3 Capacity Variation Ratio According to Temperature 4 2 4 Cooling and Heating Data Sheet in Rated Frequency 5 2 NOISE CUNE petite erin ae eee Metu rerba uu one M a M Fe UE 5 3 Outline Dimension Diagram v 6 RUN riore e kt 6 UNIE ee u 52 6 4 Refrigerant System Diagram 7 5 Electrical 222 2000 8 Fete ce ROO nasa ee ere ia ce id ium eee eee 8 5 2 PCB Printed Diao 10 6 Function and 12 6 1 Remote Controller Introduction a 12 6 2 Brief Description of Modes and 15 Part Installation and Maintenance
10. e Cut the required pipe with pipe cutter B Remove the burrs e Remove the burrs with shaper and prevent the burrs from getting into the pipe C Put on suitable insulating pipe pi D Put on the union nut Union pipe e Remove the union nut on the indoor connection pipe and outdoor valve install the union nut on the pipe E Expand the port e Expand the port with expander Note e A is different according to the diameter please refer to the sheet below 1 4 2 39 1 36 3 8 1 16 1 51 1 2 1 14 1 51 05 8 5 53 2 23 F Inspection Smooth e Check the quality of expanding port If there is any blemish expand the port again according to the steps above lt gt leaning damaged crack uneven surface thickness The length is equal Installation and Maintenance 71 Service Manual Appendix 4 List of Resistance for Temperature Sensor Resistance Table of Ambient Temperature Sensor for Indoor and Outdoor Units 15K Resistance kO Temp CF Resistance kO Temp CF Resistance kO Temp F Resistance kQ 138 1 68 1875 1382 3 848 2084 1 071 128 6 1793 0 371 2102 1 039 1 4 121 6 71 6 1 44 141 8 359 22 1 009 3 2 1 115 73 4 1639 1436 3 454 2138 75 2 15 68 145 4 3 333 2156 0 952 102 9 5 1087 68 147 2 3 217 2174 0 925 97 4 78 8 14 36 149 3 105 2192 0
11. Defrost Control Outline Heat Pump Only Defrosting is carried out by the cooling cycle reverse cycle The defrosting time or outdoor heat exchanger temperature must be more than its fixed value when finishing Detail 1 Conditions for Starting Defrost The starting conditions must be made with the outdoor air temperature and heat exchanger temperature Under the conditions that the system is in heating operation 6 minutes after the compressor is started and more than 44 minutes of accumulated time pass since the start of the operation or ending the defrosting 2 Conditions for Canceling Defrost The judgment must be made with heat exchanger temperature 39 F 72 F PI control Frequency 60sec 50 600 50sec ON Compressor ON Four way valve valve opening Initial opening Fan Control Outline Fan control is carried out according to the following priority 1 Fan ON control for electric component cooling fan 2 Fan control when defrosting Technical Information 19 20 Service Manual Fan OFF delay when stopped ON OFF control in cooling operation Tap control when drooping function is working Fan control in forced operation Fan control in indoor outdoor unit silent operation Fan control in powerful mode ON O Q Oo Fan control in normal operation Detail Fan OFF Contro
12. E D INDOOR OVERHEAT UNIT XT FILTER th 10805 3 7 412 3 113 Jew AC L1 ot ON OG w YEGN TERMINAL HEN2HEN NHENI AG N5 AC LOAC L4 ACD Y BLOCK T PIER wis maY rO BU LoL 112 x MEM HEATER ENTER EE w 3 CHASSIS COMP uu FAN WOTOR CO TAT x Technical Information Service Manual 5 2 PCB Printed Diagram Indoor Unit e Top view NO Name 4 5 Ambient temperature sensor Temperature sensor PG feedback 10 11 ann Ue GRJ836 A4 V1 3 201344843 _ e Bottom view 974 cara tI in 72 0114 121 ak aca Res R76 10 Technical Information Service Manual Outdoor Unit e Top view 13 12 11 10 9 8 1 Compressor output 6 of power neutral wire 11 Portof AC fan motor 2 Overload port 7 12 Temperature sensor port 8 of compressor electric heating 13 of electronic expansion valve communication wire 9 Por of eompressoreloctie Reatng bal Io _ 5 Earthingwire port 10 PortofACfanmotor 7 e Bottom view
13. X 520 4 Remove the electric box Twist off the 2 screws fixing the electric box cover withscrewdriver pull it upwardly and then remove the electric box cover Twist off the screws fixing the electric box with screwdriver loosen the tileline pull out the wiring terminal pull it upward and then remove the electric box 5 Remove the partition plate gt The partition plate is fixed to Loosen the 2 screws ey the bottom frame with a hook The partition plate has a e hook on the lower side Lift S 4 22 and pull the partition plate SY ee to remove 4 68 Installation and Maintenance Service Manual Procedure 6 Remove compressor 4 Way valve assy Unsolder the pipeline connected to the compressor Release all refrigerant before disassembling the pipeline Twist off the 3 foot nuts on compressor and then remove the compressor Twist off the 2 bolts fixing the gas valve unsolder the soldering joint between gas valve and air return pipe and then remove the gas valve note When unsoldering the soldering joint wrap the gas valve with wet cloth completely to avoid the damage to valve Twist off the 2 bolts fixing the liquid valve unsolder the soldering joint between liquid valve and Y type tube and then remove the liquid valve Gas valve lt WN and liq
14. 6 Malfunction of power supply from indoor unit to outdoor unit Main inspection point Inspect the power supply plug seat with AC voltage gauge to check if the voltage between L and N is within 200VAC 240VAC Check with AC voltage gauge if the voltage between 3 of indoor wiring block is within 200VAC 240VAC Flow chart of Malfunction diagnosis Energize the unit and wait for 3min Measure voltage between N 1and 3 of indoor wiring block Voltage gt 200V Measure voltage between L and N of outdoor wiring block Voltage gt 200V Indoor main board error indoor and outdoor wiring error Outdoor electric box error Adjust wiring Replace main board of indoor unit Replace outdoor Replace indoor electric box and outdoor wiring Remove malfunction 7 Indoor fan does not rotate and there is no feedback Main detection point 15 control panel reliably connected with the motor Is it loose Is the connecting sequence correct 5 input voltage within the normal range measure the voltage between L and of the wiring block XT with AC voltage gauge Malfunction diagnosis process Installation and Maintenance 43 Service Manual Energize the unit and start it Voltage between Land N of indoor wiring block connecting state of the connecting terminal Voltage gt 200V Reliable
15. AEE dorus eV P 1 1 1 1 1 Tc a pore m 1 1 1 1 ad See ele mus E SN 2 1 1 1 1 1 1 1 1 N LO N v 1 1 1 I 1 I 1 1 IPIE RIO n 1 1 I os 1 1 gt 1 1 5 1 1 as 1 4 S za og 1 m 1 I 552 ob sss 5888 1 i S 1 1 40 60 80 100 120 20 100 120 80 60 Compressor Frequency Hz Compressor Frequency Hz 2 3 Capacity Variation Ratio According to Temperature Heating Cooling eee ES T wo ox m 5 o dc bo esce S q SO 55542 goo oococo pec 1 MCA N e 95 one1 Aoede5 ot T S g woe cM 5 SATS 5554 gooo S o OSSA diee i 5
16. 558 256 186 428 191 m ns 152 5 294 177 446 ma me 26 1 522 2552 175 454 466 168 so 257 162 482 126 1906 186 49 258 16 74 Installation and Maintenance 7 FRIEDRICH JF00302172
17. and blink 20 times OFF 3S and blink 19 times OFF 3S and blink 11 times During cooling and drying operation compressor will stop 27 analysis IPM protection loss while indoor fan will operate 3 of synchronism protection and During heating operation the b Ng overcurrent protection of phase complete unit will stop current for compressor operation Refer to the malfunction OFF 1S and blink 4 times OFF 1S and blink 10 times 1 Bad contact of DC motor feedback terminal 2 Bad contact of DC motor control end 3 Fan motor is stalling 4 Motor malfunction Internal fan motor external fan motor compressor and electric heater stop operation guide louver stops at present location 5 Malfunction of mainboard rev detecting circuit Refer to the malfunction analysis IPM protection loss of synchronism protection and overcurrent protection of phase current for compressor During cooling and drying operation compressor will stop while indoor fan will operate During heating operation the complete unit will stop operation During cooling and drying operation compressor will stop while indoor fan will operate During heating operation the complete unit will stop operation OFF 1S and blink Refer to the malfunction analysis Outdoor DC fan motor DC fan motor malfunction or malfunction lead to compressor system blocked or the connector stop operation loosed
18. ni Indicator has 3 kinds of Indicator Display during Malfunction blinking 0 5s and OFF display status and during blinking ON 0 5s and OFF status Possible Causes and blink 1 times OFF 3S and blink 1 times When the outdoor unit receive signal of Gathering refrigerant the system will be forced to run under cooling mode for gathering refrigerant Nominal cooling mode OFF 3S and blink once During cooling and drying operation indoor unit operates while other loads will stop during heating operation the complete unit will stop operation 1 Loosening or bad contact of indoor ambient temp sensor and mainboard terminal 2 Components in mainboard fell down leads short circuit 3 Indoor ambient temp sensor damaged check with sensor resistance value chart 4 Mainboard damaged OFF 3S and blink twice AC stops operation once reaches the setting temperature Cooling drying internal fan motor stops operation while other loads stop operation heating AC stop operation 1 Loosening or bad contact of Indoor evaporator temp sensor and mainboard terminal 2 Components on the mainboard fall down leads short circuit 3 Indoor evaporator temp sensor damaged check temp sensor value chart for testing 4 Mainboard damaged 32 OFF 3S and blink 3 times OFF 3S and blink 4 times OFF 3S and blink 5 times OFF 3S and blink for 6 time
19. sm amp 4 634 1346 2048 37 4s 62 6433 164 139 2066 359 2 483 e os 12 1262 204 354 42 202 346 14 4074 ne 569 ms 22 sms 32 345 74 me 258 32 s 325 752 ma 258 319 es ms m 493 172 189 274 sa ae 339 ao 19 108 292 2955 104 362 sos 47 18 387 21 282 122 206 84 1526 228 2192 24 892 43 4544 968 22435 2115 i58 293 sea 152 264 26 ire 256 ss so 18 sss 282 2568 194 226 896 1598 826 2 24 212 265 914 348 1616 238 244 932 3345 1634 77 2336 2365 248 153 9 3205 1652 77 254 2302 256 191 958 sorn 1 724 272 224 284 15 96 2954 1688 69e 2 2182 302 165 104 28 1706 xos 2424 3 1022 2723 124 652 2426 209 338 15 2615 142 244 206 356 msa 158 251 619 262 193 sra 153 106 an sos 28 192 392 435 194 239 106 5 2498 tes 4 51 m 22 194
20. the system selects the operation mode cooling and fan automatically according to the ambient temperature The display shows the actual operation mode and setting temperature There will be 30s delay for mode conversion The protection function is the same as that of other modes 1 When T amp 277 F the cooling mode is selected 2 for cooling only unit when Tamb lt 71 6 F the unit runs in fan mode 3 When 71 6 F ST indoor amo lt 77 F upon initial startup the unit will enter auto mode and run in automatic fan mode If the other mode changes to auto mode the previous operation mode will remain Cooling operation Cooling operation With compressor capacity supplied With no compressor capacity supplied 6 Auto fan speed Mode In auto fan mode the rotational speed of the fan for indoor unit is decided by the differential temperature between ambient temperature and set temperature In dry mode the automatic fan speed is forced to be low No of Unit High Medium Low jumper type Mode Turbo fan fan fan cap speed speed speed Rotational speed during cooling 1300 1100 09K Rotational speed 1300 during heating Rotational speed during cooling 1350 12K Rotational speed during heating 1950 4208 7 Lover Control After energization the swing motor will open the horizontal louver to be open and then be close completely And the air outlet is c
21. Adjust connection connecting state eplace main board of indoor unit remove the error Check power supply Y Y Replace motor 8 Temperature sensor malfunction Main detection points 5 outdoor ambient temperature within the normal range 5 indoor and outdoor fan running normally e 5 radiating environment inside and outside the unit good enough Malfunction diagnosis process Energize the unit and start it connecting Indoor unit Y state of indoor display F1 F2 temperature sensor N Indoor unit reliable N display F4 F5 connected Y Adjust Check connecting state of Y outdoor temperature sensor liable perature N Remove error connected state sensor Replace esmepnesroar Remove error Remove error ture Sensol Y N error Replace main boarudn iotf indoor Y Replace parts of outdoor electric box e Installation and Maintenance Service Manual 9 Malfunction diagnosis of startup failure Main detection points 5 wiring of compressor correct 5 stop time of compressor enough 5 compressor damaged Malfunction diagnosis process Is compressor wire connected correctly Energize the unit and start it Is the stop time of compressor more than 3min
22. Drainage pipe 23 Service Manual Installation procedures Start installation Preparation before installation Read the requirements select installation Prepare tools for electric connection location Select indoor unit Select outdoor unit installation location installation location Install wall mounting Install the support of outdoor unit frame drill wall holes select it according to the actual situation Fix outdoor unit Connect pipes of indoor unit and drainage pipe Connect wires of indoor unit Bind up pipes and hang the indoor unit only for cooling and heating unit Install drainage joint of outdoor Make the bound pipes pass through the wall hole and then connect outdoor unit Connect pipes of outdoor unit Connect wires of outdoor unit Neaten the pipes Vacuum pumping and leakage detection Check after installation and test operation Finish installation Note this flow is only for reference please find the more detailed installation steps in this section 24 e Installation and Maintenance Service Manual 8 2 Installation Parts checking No Name No X Name 8 Sealing gum Outdoor unit 9 Wrapping tape Connection pipe 10 Support of outdoor unit Drainage pipe 11 Fixing screw Wall mounting Drainage plug cooling 5 12 frame and heati
23. Motor Rotating Speed Compressor frequency Hz 09K 12K 09K 12K Technical Information Service Manual 3 Outline Dimension Diagram 3 1 Indoor Unit 8 1 Y b MWM09Y1J MWM12Y1J Unit inch 3 2 Outdoor Unit MRM09Y1J MRM12Y1J 80 10 1 8 ae a J 21 1 4 S D 5 niu TS L 33 2 5 12 3 5 11 2 3 21 1 4 Unit inch Technical Information Service Manual 4 Refrigerant System Diagram Cooling amp Heating Models Indoor unit Outdoor unit Gas pipe side NES Valve exchanger Compressor evaporator Heat exchanger zd pipe condenser 000 A d N J x 2 TN Strainer Capillary lt COOLING HEATING Refrigerant pipe diameter Liquid 1 4 Gas 3 8 Technical Information 1 o Service Manual 5 Electrical Part 5 1 Wiring Diagram elnstruction Color Symbol Symbol Color Symbol wi 7m m pw Note Jumper cap is used to determine f
24. When setting temperature indoor temperature 29 3 F it lasts for a certain period the unit will start heating In that case indoor fan outdoor fan and compressor will start running The indoor fan works according to the anti cold air n this mode the range of setting temperature is 61 86 F A Setting temperature indoor temperature 2 Protection function heating mode when the compressor stops result of malfunction the indoor fan blows residual heat 3 Defrosting control when the defrosting signal is revived defrosting Technical Information mark will be shown e heater and indoor stop Anti cold air function The rotational speed of indoor electromotor is decided based on the indoor pipe temperature The indoor fan can run at low speed or stop running This function will terminate after the unit runs for 3min or the pipe temperature reached certain value During heating if the indoor pipe temperature is lower than certain value The running speed of indoor fan will decrease automatically base on the pipe temperature and ensure that the outlet air is hot Residual heat blowing function During heating when the stopping condition for the compressor is reached the compressor and the outdoor fan motor stop running while the upper and lower air deflector rotate to level L the indoor fan will stop after running for 60s at setting speed 5 Auto Changeover Mode In this mode
25. compressor stop operation and Outdoor fan motor will stop 30s latter 3 minutes latter fan motor and compressor will restart To protect the electronical components when detect high power and blink Indoor unit and outdoor unit doesn t match compressor and Outdoor fan motor can t work During cooling and drying operation compressor will stop while indoor fan will operate During heating operation the complete unit will stop operation Refer to the malfunction analysis 35 Malfunction phase current detection circuit for compressor Malfunction of complete units current detection Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of Indicator Display during Dual g blinking ON 0 5s and OFF Power Cool Indicator Indicator display status and during blinking ON 0 5s and OFF Heating Yellow Red Green Indicator Indicator Indicator Indicator OFF 3S and blink 13 times OFF 3S and blink 20 times OFF 3S and blink 13 times OFF 3S and blink 20 times Service Manual status Possible Causes During cooling and drying operation compressor will stop while indoor fan will operate During heating operation the complete unit will stop Replace outdoor control panel AP1 During cooling and drying operation compressor will stop while indoor fan will operate During heating operation the complete unit will stop Supply voltage
26. fixing holes on the wall 2 Drill the screw fixing holes on the wall with impact drill the specification of drill head should be the same as the plastic expansion particle and then fill the plastic expansion particles in the holes 25 3 Fix the wall mounting frame the wall with tapping screws ST4 2X25TA and then check if the frame is firmly installed by pulling the frame If the plastic expansion particle is loose please drill another fixing hole nearby 3 Install Wall mounting Frame 1 Choose the position of piping hole according to the direction of outlet pipe The position of piping hole should be little lower than the wall mounted frame As show in Fig 1 Wall Wall _ Gradienter ipsos W w yeas to the wall 6inch above 7 MX Right 2 1 6inch Fig 1 2 1 6inch Rear piping hole Rear piping hole 2 Open a piping hole with the diameter of 2 1 6inch on the selected outlet pipe position In order to drain smoothly slant the piping hole on the wall slightly downward to the outdoor side with the gradient of 5 10 As show in Fig 2 2 Indoor Outdoor 2 1 6inch Fig 2 15 107 Note 1 Pay attention to dust prevention and take relevant safety measures when opening the hole 2 The plastic expansion particles are not provided and should be bought locally 4 Outlet Pipe 1 The pipe can be led out in the direction of right
27. is drooping Frequency management is carried out only when the frequency droops For limiting lower limitFrequency management is carried out only when the frequency rises 4 Upper and lower limit of frequency by PI controlThe frequency upper and lower limits are set depending on indoor unit When low noise commands come from the indoor unit or when outdoor unit low noise or quiet commands come from indoor unit theupper limit frequency must be lowered than the usual setting 3 minutes Standby Prohibit to turn ON the compressor for 3 minutes after turning it off except when defrosting Compressor Protection Function When turning the compressor from OFF to ON the upper limit of frequency must be set as follows The function must not be used when defrosting Frequency 88 FCG3 64 FCG2 48 FCG1 240 360 TCG 1sec TCG 2sec TCG 3sec Time 1 80 lt gt gt gt Discharge Pipe Control Outline The discharge pipe temperature is used as the compressor s internal temperature If the discharge pipe temperature rises above a certain level the operating frequency upper limit is set to keep this temperature from going up further Detail Divide the Zone Stop zone Drooping zone Keep zone Up zone Heat exchanger thermistor temperature Reset zone Technical Information Service Manual 18 Management within the Zones Zone Control contents Stop zone When the
28. panel 2 5 o o Loosen the screw the Pull down the stop valve cable cross plate sub cover and remove it assy and remove it 2 Remove top panel Loosen the 3 screws right left and lift the top panel 1 Features 66 Service Manual s mm Twist off the screws connecting the grille and the panel with screwdriver and then remove the grille Twist off the screws connecting the panel and the motor support chassis and grille with screwdriver and then remove the outer case Twist off the screws connecting right side plate and end plate of condenser grille valve support and electric box and then remove the right side plate 3 Remove the fan motor Twist off the nut on blade with wrench and then remove the axial flow blade Installation and Maintenance Lift the front panel and remove it while pushing the right side panel inwards Step Procedure Points The screw has reverse winding Remove the propeller 67 Service Manual Procedure H motor fixing frane Twist off the 4 tapping screws fixing the motor pull out the pin of leading wire of motor X and then remove the motor M Twist off the 2 tapping screws 1 motor support and 1 screws on electric box pull it Fan motor EER lt 2 upward and then remote the lt motor support
29. plugged up somewhere Please refer to the malfunction analysis discharge protection overload 1 Supply voltage is unstable 2 Supply voltage is too low and load is too high 3 Evaporator is dirty Refer to the corresponding malfunction analysis OFF 3S and blink 8 times During cooling operation compressor will stop while indoor fan will operate During heating operation the complete unit stops Refer to the malfunction analysis overload high temperature resistant protection of jumper cap Installation and Maintenance OFF 3S and blink 15 times During cooling and drying operation compressor will stop while indoor fan will operate During heating operation the complete unit will stop All loads operate normally while operation frequency for compressor is decreased Wireless remote receiver and button are effective but can not dispose the related command Replace outdoor control panel 1 Discharging after the complete unit is de energized for 20mins check whether the thermal grease on IPM Module of outdoor control panel AP1 is sufficient and whether the radiator is inserted tightly If its no use please replace control panel AP1 1 No jumper cap insert on mainboard 2 Incorrect insert of jumper cap 3 Jumper cap damaged 4 Abnormal detecting circuit of mainboard 31 Service Manual Display Method of Outd Display Method of Indoor Unit pos E
30. rear right left or rear left As show in Fig 3 2 When selecting leading out the pipe from left or right please cut off the corresponding hole on the bottom case As show in Fig 4 Le Rear left Fig 3 Right Rear right Left Right Cut off the hole Fig 4 26 Service Manual 5 Connect the Pipe of Indoor Unit 1 Aim the pipe joint at the corresponding bellmouth As show in Fig 5 2 Pretightening the union nut with hand 3 Adjust the torque force by referring to the following sheet Place the open end wrench on the pipe joint and place the torque wrench on the union nut Tighten the union nut with torque wrench As show in Fig 6 4 Wrap the indoor pipe and joint of connection pipe with insulating pipe and then wrap it with tape As show in Fig 7 Open end wrench Union nut Pipe QT Fig 5 Indoor pipe Fig 6 2 _ Insulating pipe Fig 7 Refer to the following table for wrench moment force Hex nut diameter inch Tightening torque ft Ibf 11 14 7 22 8 29 5 33 2 40 6 44 3 47 9 51 6 55 3 6 Install Drain Hose 1 Connect the drain hose to the outlet pipe of indoor unit As show in Fig 8 2 Bind the joint with tape As show in Fig 9 Drain hose Outlet pipe Tu S W Outlet Drain hose Fig 8 pipe A Note 1 Add insulating pipe the indoor drain hose order to prevent condensation 2 The plastic exp
31. temperature reaches the stop zone stop the compressor and correct abnormality Drooping zone Start the timer and the frequency will be drooping Keep zone Keep the upper limit of frequency Return Reset zone Cancel the upper limit of frequency Input Current Control Outline Detect an input current by the CT during the compressor is running and set the frequency upper limit from such input current In case of heat pump model this control is the upper limit control function of the frequency which takes priority of the lower limit of four way valve activating compensation Detail The frequency control will be made within the following zones 2 Hz drooping 1 0second after After 2 5 seconds rushing in the lt gt drooping zone gt Compressor stops Stop zone Drooping zone Keep zone Reset zone When a stop current continues for 2 5 seconds after rushing on the stop zone the compressor operation stops If a drooping current is continues for 1 0 second after rushing on the drooping zone the frequency will be 2 Hz drooping Repeating the above drooping continues until the current rushes on the drooping zone without change In the keep zone the frequency limit will remain In the return reset zone the frequency limit will be cancelled Limitation of current drooping and stop value according to the outdoor air temperature 1 In case the operation mode is cooling The current droops when outdoor air te
32. the manufacturer its service agent or similarly qualified persons in order to avoid a hazard 8 The temperature of refrigerant circuit will be high please keep the interconnection cable away from the copper tube 2 Grounding Requirement 1 The air conditioner is first class electric appliance It must be properly grounding with specialized grounding device by a professional Please make sure it is always grounded effectively otherwise it may cause electric shock 2 The yellow green wire in air conditioner is grounding wire which can t be used for other purposes 3 The grounding resistance should comply with national electric safety regulations 4 The appliance must be positioned so that the plug is accessible 5 An all pole disconnection switch having a contact separation of at least 3mm in all poles should be connected in fixed wiring 6 Including an air switch with suitable capacity please note the following table Air switch should be included magnet buckle and heating buckle function it can protect the circuit short and overload Caution please do not use the fuse only for protect the circuit 8 5 Installation of Indoor Unit 1 Choosing Installation location Recommend the installation location to the client and then confirm it with the client 2 Install Wall mounting Frame 1 Hang the wall mounting frame on the wall adjust it in horizontal position with the level meter and then point out the screw
33. to the closed position 2 Connect the charge set and a gas cylinder to the service port of the Gas side valve Leave the valve on the gas cylinder closed 3 Air purging Open the valves on the gas cylinder and the charge set Purge the air by loosening the flare nut on the liquid side valve ap proximately 45 or 3 seconds then closing it for 1 minute repeat 3 times After purging the air use a torque wrench to tighten the flare nut on liquid side valve 4 Check for gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant Close the valve on the gas cylinder and discharge the refriger ant until the gauge indicates 3 to 5 kg cm g 50 6 Disconnect the charge set and the gas cylinder and set the Liquid side and Gas side valves to the open position Be sure to use a hexagonal wrench to operate the valve stems 7 Mount the valve stem nuts and the service port nut Use torque wrench to tighten the service port nut to a torque of 1 8 kg m Be sure to check for gas leakage CAUTION Do not leak the gas in the air during Air Purging Installation and Maintenance Service Manual Balance Refrigerant of the 3 way Valve Gas leakage Liquid side Outdoor unit Procedure 1 Confirm that both the 2 way and 3 way valves are set to the back seat 2 Connect the charge set to the 3 way valves port Le
34. 04 8 206 6 1 811 24 _ _ 8 1 754 249 8 1 699 251 6 _ 7 _ _ _ 1 645 1 594 1 544 1 497 1 451 1 408 1 363 1 322 1 282 1 244 1 207 1 171 1 136 1 103 253 4 255 2 25 258 8 260 6 262 4 264 2 266 267 8 269 6 271 4 273 2 275 276 8 237 2 0 678 72 Installation and Maintenance Service Manual Resistance Table of Tube Temperature Sensors for Indoor and Outdoor 20K Resistance Temp CF Resistance Temp C Resistance kA Temp CF Resistancetn 22 1814 68 201 1382 513 j 294 1427 04 1714 29 4 212 1386 14 161 716 2285 1418 473 22 1346 32 1533 734 218 1436 4605 238 1307 Ls as sa aus 1288 68 1372 1472 429 2174 6 1299 2192 3 E 1165 2228 224 3 5 1046 2264 9913 2282 8917 2318 84 61 2536 8031 2354 7624 22 741 Es 6879 2405 6537 1022 706 1724 2 663 2426 6213 104 1062 1742 2577 2444 5908 1058 02 176 2495 2462 imi im
35. 898 80 6 13 74 5 92 22 87 35 82 75 78 43 74 35 70 5 150 8 2998 221 04873 82 4 13 16 152 6 2896 2228 0 848 2 797 2243 5 0 825 2 702 84 2 12 6 154 4 12 07 156 2 226 4 0 802 87 8 11 57 158 2 611 228 2 0 779 89 6 11 09 159 8 2 523 2 0 0 758 91 4 10 63 161 6 2 439 66 88 231 8 0 737 93 2 10 2 163 4 2 358 3 24 8 60 23 95 9 779 165 2 2 28 57 18 2 63 46 235 4 0 697 96 8 9 382 167 2 206 3 233 6 0 717 3 98 6 9 003 168 8 2 133 239 54 31 51 59 100 4 _ _ _ _ _ 06 240 8 49 02 102 2 _ _ _ mm 8 642 170 6 2 064 44 31 42 14 40 09 38 15 36 32 34 58 32 94 31 38 29 9 28 51 27 18 25 92 24 73 23 6 22 53 21 51 20 54 19 63 8 297 172 4 1 997 242 6 104 105 8 107 6 109 4 111 2 113 114 8 116 6 118 4 120 2 122 123 8 125 6 1274 129 2 131 132 4 5 134 6 136 4 7 967 174 2 _ _ _ 7 653 176 _ _ _ 1 933 244 4 0 608 1 871 246 2 7 352 7 065 6 791 6 529 6 278 6 038 5 809 5 589 5 379 5 197 4 986 4 802 4 625 4 456 4 294 4 139 3 99 177 8 179 6 181 4 183 2 185 186 8 188 6 190 4 192 2 194 195 8 197 6 199 4 201 2 203 2
36. Compulsive Defrosting Function 1 Start up compulsory defrosting function Under ON status set heating mode with remote controller and adjust the temperature to 16 C 61 F Press button successively within 5s and the complete unit will enter into compulsory defrosting status Meanwhile defrosting mark H1 will be shown Note If complete unit has malfunction or stops operation due to protection compulsory defrosting function can be started up after malfunction or protection is resumed 2 Exit compulsory defrosting mode After compulsory defrosting is started up the complete unit will exit defrosting operation according to the actual defrosting result and the complete unit will resume normal heating operation Technical Information Service Manual Part Installation and Maintenance 7 Notes for Installation and Maintenance Safety Precautions Important Please read the safety precautions carefully before installation and maintenance The following contents are very important for installation and maintenance Please follow the instructions below eThe installation or maintenance must accord with the instructions eComply with all national electrical codes and local electrical codes ePay attention to the warnings and cautions in this manual eAll installation and maintenance shall be performed by distributor or qualified person eAll electric work must be performed by a licensed t
37. OFF 3S and blink twice OFF 3S and blink 4 times OFF 3S and blink 5 times OFF 3S and blink 6 times Indicator has 3 kinds of display status and during blinking ON 0 5s and OFF 0 5s Yellow Indicator OFF 1S and blink 3 times OFF 1S and blink 7 times OFF 1S and blink 5 times status During cooling and drying operation except indoor fan operates all loads stop operation During heating operation the complete unit stops During cooling and drying operation compressor and outdoor fan stop while indoor fan operates The Dual 8 Code Display will show FO and the complete unit stops During cooling and drying operation compressor and outdoor fan stop while indoor fan operates During heating operation all loads stop During cooling and drying operation compressor and outdoor fan stop while indoor fan operates During heating operation all loads stop During cooling operation compressor stops while indoor fan motor operates During heating operation the complete unit stops Possible Causes Possible reasons 1 Refrigerant was superabundant 2 Poor heat exchange including filth blockage of heat exchanger and bad radiating environment Ambient temperature is too high 1 Poor air return in indoor unit 2 Fan speed is abnormal 3 Evaporator is dirty 1 In defect of refrigerant 2 Indoor evaporator temperature sensor works abnormally 3 The unit has been
38. Press A and w buttons simultaneously to lock or unlock the keypad If the remote controller is locked m is displayed In this case pressing any button blinks three times Combination of MODE and buttons Allows you to toggle between Fahrenheit and Celsius When the unit is OFF press MODE and Y buttons simultaneously to switch between C and Replacement of Batteries in Remote Controller 1 Press the back side of remote controller marked with as shown in the fig and then push out the cover of battery box along the arrow direction 2 Replace two 7 AAA 1 5V dry batteries and make sure the position of polar and polar are correct 3 Reinstall the cover of battery box Note e During operation point the remote control signal sender at the receiving window on indoor unit e The distance between signal sender and receiving window should be no more than 8m and there should be no obstacles between them e Signal may be interfered easily in the room where there is fluorescent lamp or wireless telephone remote controller should be close to indoor unit during operation e Replace new batteries of the same model when replacement is required e When you don t use remote controller for a long time please take out the batteries e the display on remote controller is fuzzy or there s no display please replace Sketch for batteries replacing batteries Technical Inform
39. aintenance 61 5 Removal of front grille assembly 62 Remove a service cover mounting screw Open service cover upward Remove the 5 screws in the right and the left which fix the main body with the front grille Disengage the 3 hooks on the upper part In case that the hooks are not pressed from above remove the front panel and then remove the grille while pushing the hook through a clearance between the front grille and the heat exchanger The front grille can be removed in a manner to pull out the upper part forward and lift up the lower part Service Manual 4 Opening and closing of service cover A switch for field setting is not provided in particular Screw stoppers inside the flap which were equipped in the existing models are not provided At the upper part there 2 hooks in the left and the right Disengage the hooks by pressing knobs with screwdriver Installation and Maintenance Service Manual 6 Remove electrical box Disconnect the Cable clamp Remove Temperature Heat exchanger thermistor Sensor Disconnect the connection wires Twist off the earthing screw fixing the evaporator Pull out the all the wiring terminals Connecting wires Remove a screw on the electrical box Installation and Maintenance attention to the direction of the retainer of the thermistor so that the
40. an speed and the swing angle of horizontal lover for this model e Indoor Unit MWMO09Y1J MWM12Y1J ROOM TUBE DISPLAY TEM SENSOR SENSOR 1 DISP2 DISP1 9 RT2 OUTDOOR UNIT N N 1 ROOM TUBE DISP1 DISP2 CON QUT A4 I 3 3 i I TERMINAL l 1 2 BLOCK JUMP EVAPORATOR II od l 1 PGF PG SWING UD 2 2 l 1 2 FAN MOTOR SWING MOTOR U D Technical Information Service Manual e Outdoor Unit MRMO9Y1J MRM12Y1J These circuit diagrams are subject to change without notice please refer to the one supplied with the unit TUBE QUTROOM TEM EXHAUST NSOR TEM SENSOR TEM SENSOR COMP Fis A W3YEGN 04 U al 6 V RD RD G 4 W NEN AO NSAC NAAC L3ACL2 L
41. and outflow air emitted by the outdoor unit will not affect neighborhood 2 The location should be well ventilated and dry in which the outdoor unit won t be exposed directly to sunlight or strong wind 3 The location should be able to withstand the weight of outdoor unit 4 Make sure that the installation follows the requirement of installation dimension diagram 5 Select a location which is out of reach for children and far away from animals plants If it is unavoidable please add fence for safety purpose Installation and Maintenance 8 4 Electric Connection Requirement 1 Safety Precaution 1 Must follow the electric safety regulations when installing the unit 2 According to the local safety regulations use qualified power supply circuit and air switch 3 Make sure the power supply matches with the requirement of air conditioner Unstable power supply or incorrect wiring may result in electric shock fire hazard or malfunction Please install proper power supply cables before using the air conditioner 4 Properly connect the live wire neutral wire and grounding wire of power socket 5 Be sure to cut off the power supply before proceeding any work related to electricity and safety 6 Do not put through the power before finishing installation 7 For appliances with type Y attachment the instructions shall contain the substance of thefollowing If the supply cord is damaged it must be replaced by
42. ansion particles are not provided As show in Fig 10 ___ Drain hose d 1 HW Insulating pipe Fig 10 Installation Maintenance Service Manual 7 Connect Wire of Indoor Unit 1 Open the panel remove the screw on the wiring cover and then take down the cover As show in Fig 11 Panel Screw Fig 11 Wiring cover 2 Fix the wire crossing board on connection wire sleeve at the bottom case let the connection wire sleeve go through the wire crossing hole at the back of indoor unit and then pull it out from the front As show in Fig 12 N ae Fig 12 3 Remove the wire clip connect the power connection wire to the wiring terminal tighten the screw and then fix the power connection wire with wire clip As show in Fig 13 2 yellow green J Outdoor unit connection SS Fig 13 4 Put wiring cover back and then tighten the screw 5 Close the panel A Note 1 All wires of indoor unit and outdoor unit should be connected by a professional 2 If the length of power connection wire is insufficient please contact the supplier for a new one Avoid extending the wire by yourself 3 For the air conditioner with plug the plug should be reachable after finishing installation 4 For the air conditioner without plug an air
43. ate When the setting time is reached the unit will start and stop running In that case the unit will run according to the previously setting mode when the setting time for timer on is reached The unit will stop running while the setting time for timer off is reached If the setting time for timer on and timer off is the same the unit will stop running no matter what the current state is 10 Auto Restart Function Memory mode up and down swing light setting temperature setting fan speed general timer not clock Fahrenheit Celsius After de energized the unit can run according to the memory if it is energized again If the tim function is not set in the last remote control the system will run according to the last remote control If the timer function is set in the last control before it is de energized the system will memorize the last timer setting The setting time is recalculated since the energization of the unit If the timer function is set in the last control and the setting time is reached before the unit is de energized the unit will run according to the previous running mode after it is energized again But the timer function will terminate The clock will not be memorized In cooling and heating mode not available in auto dehumidify fan mode press the Turbo button the fan speed displayed super high speed in the remote controller and the indoor fan rotates at super high speed 11 Turbo Function In cooling and heating mod
44. ation Service Manual 6 2 Brief Description of Modes and Functions 1 Cooling Mode 1 When room temp set temp x 3 6 F cooling will stop Outdoor fan will stop later and indoor fan will operate at set speed 2 When room temp set temp gt 3 6 F if such situation continues for a period of time cooling operation will be started In that case indoor fan outdoor fan and compressor will operate and the indoor fan will operate at set speed In this mode fan and swing motor will operate at set status and the temp range setting is 61 86 F If there is malfunction of outdoor unit or the unit stops for protection the indoor unit will keep its operation status but the error will be displayed Indoor temperature object temperature 2 Dry Mode 1 In this mode the fan motor runs at low fan speed while swing works according to setting state The range of setting temperature is 61 86 F 2 When outdoor unit has malfunction or stopped for protection the indoor fan will keep the original running state and the error will be displayed 3 Fan Mode 1 In this mode the indoor fan may run at high medium low and automatic speed The compressor outdoor fan and 4 way valve all stop running 2 In this mode the range of setting temperature is 61 86 F 4 Heat Mode 1 Heating mode When setting temperature indoor temperatures 29 3 unit will stop heating Both outdoor fan and indoor fan will stop later
45. ave the valve on the charge set closed Connect the charge hose to the service port Installation and Maintenance 3 Open the valve Lo side on the charge set dis charge the refrigerant until the gauge indicates 0 kg cm G If there is no air in the refrigerant cycle the pressure when the air conditioner is not running is higher than 1kg cm G discharge the refrigerant until the gauge indicates 0 5 to 1kg cm G if this is the case it will not be necessary to apply a evacuation Discharge the refrigerant gradually if it is discharged too suddenly the refrigeration oil will also be discharged 51 Evacuation All amount of refrigerant leaked Service Manual Outdoor unit Procedure 1 Connect the vacuum pump to the center hose of charge set center hose 2 Evacuation for approximately one hour Confirm that the gauge needle has moved toward 76cmHg vacuum of 4 mmHg or less 52 3 Close the valve Lo side on the charge set turn off the vacuum pump and confirm that the gauge needle does not move approximately 5 minutes after turning off the vacuum pump 4 Disconnect the charge hose from the vacuum pump Vacuum pump oil If the vacuum pump oil becomes dirty or depleted replenish as needed Installation and Maintenance Service Manual Gas Charging After Evacuation Outdoor unit Procedure 1 Conne
46. bient temperature and blank is displayed circularly AIR SWEEP icon 5115 displayed when pressing the AIR SWEEP button Press this button again to clear the display LIGHT icon 9 is displayed by pressing the LIGHT button Press LIGHT button again to clear the display LOCK icon is displayed by pressing and A buttons simultaneously Press them again to clear the display SET TIME display After pressing TIMER button ON or OFF will blink This area will show the set time TURBO icon 6 is displayed when pressing the TURBO button Press this button again to clear the display DIGITAL display This area will show the set temperature SENSOR icon is displayed when pressing the SENSOR button Press this button again to clear the display FAN SPEED display Press FAN button to select the desired fan speed setting AUTO Low Med High Your selection will be displayed in the LCD windows except the AUTO fan speed EXTEND icon is displayed when pressing the EXTEND button Press this button again to clear the display eee Technical Information Service Manual Introduction for Buttons on Remote Controller 1 START STOP button Press this button to turn on the unit Press this button again to turn off the unit 2 w Press this button to decrease set temperature Hold it down for 2 seconds or more to rapidly decrease set temperature In AUTO mode set temperature is not adjustable 3 A Press this b
47. client 2 Method of test operation e Put through the power press ON OFF button on the remote controller to start operation e Press MODE button to select AUTO COOL DRY FAN and HEAT to check whether the operation is normal or not e If the ambient temperature is lower than 60 8 F the air conditioner can t start cooling 29 Service Manual 9 Maintenance 9 1 Error Code List 1 Malfunction display requirement When there are several malfunctions they will be displayed circularly 2 Malfunction display method 1 Hardware malfunction immediate display refer to error code list 2 Operation state immediate display refer to error code list 3 Other malfunctions it is displayed after the compressor stops for 200s refer to error code list Note when the compressor is restarted the malfunction display delay time 200s is cleared 3 Display control viaremote controller Enter display control press light button successively for 4 times within 3s to display the corresponding malfunction code Exit display control pressing light button successively for 4 times within 3s or after display is shown for 5 the display will terminate 30 Installation and Maintenance Service Manual Display Method of Outdoor Display Method of Indoor Unit Unit Malfunction Name Indicator Display during blinking ON 0 5s and OFF 0 5s Power Indicator OFF 3s and blink once
48. ct the charge hose to the charging cylinder This is different from previous procedures Connect the charge hose which you dis connected from the Because you are charging with liquid refrigerant vacuum pump to the valve at the bottom of the cylinder from the gas side absolutely do not attempt to If you are using a gas cylinder also use a scale and reverse charge with larger amounts of liquid refrigerant the cylinder so that the system can be charged with liquid while operating the air conditioner 2 Purge the air from the charge hose Open the valve at the bottom of the cylinder and press the check valve on the charge set to purge the air Be careful of 4 Immediately disconnect the charge hose from the 3 way the liquid refrigerant valves service port Stopping partway will allow the gas to be discharged If the system has been charged with liquid refrigerant while 3 Open the valve Lo side on the charge set and charge operating the air conditioner turn off the air conditioner before the system with liquid refrigerant disconnecting the hose If the system can not be charged with the specified amount of refrigerant it can be charged with a little at a time approximately 150g each time while operating the air 5 Mount the valve stem nuts and the service port nut conditioner in the cooling cycle however one time is not Use torque wrench to tighten the service port nut to a torque sufficient wait app
49. cted by remote controller with different function 1 General timer start and stop time can be set The accuracy is minute E g timer on for 1 hour timer off for 1 5 hours Timer on after setting timer on the unit will run at setting time according to the original setting mode The timing interval is 0 5hour and the setting range is 0 5 24hours Timer off the timer off function can be set when the unit is on When the setting time for timer off is reached the unit will stop The timing interval is 0 5hour and the setting range is 0 5 24hours 2 start and stop time can be set The accuracy is minute 0 timer on at 8 00a m timer off at 17 30p m Timer on if the timer on function is set when the system is on the system will go on running If the timer on function is set when the system is off the system will start running in the previously set mode when the setting time is reached Timer off if the timer off function is set when the system is off the system will keep off even though the setting time is reached If t he timer off function is set when the system is on the system will stop running when the setting time is reached Timer modification when the system is under timer state start or stop of the unit can be set via remote ON OFF button and the timer can be reset The system runs according to the latest setting state When both the timer on and timer off are set the system runs according to the current setting st
50. d 8 TIMER ON button Press this button to initiate the auto ON timer To cancel the auto timer program simply press this button again After pressing this button disappears ON blinks 00 00 is displayed for ON time setting Within 5 seconds press A or w button to adjust the time value Every press of either button changes the time setting by 1 minute Holding down either button rapidly changes the time setting by 1 minute and then 10 minutes Within 5 seconds after setting press TIMER ON button to confirm 9 AIR SWEEP button Press this button to set up amp down swing angle which circularly changes as below 4 gt J no display EE lt gt horizontal louvers stops at current position This remote controller is universal If any command M or z is sent out the unit will carry out the command as indicates the guide louver swings as z 11 10 button Pressing EXTEND button COOL DRY mode the icon is displayed the indoor fan will continue operation for 10 minutes in order to dry the indoor unit even though you have turned off the unit After energization EXTEND OFF is defaulted EXTEND is not available in AUTO FAN or HEAT mode 11 TEMP button By pressing this button you can display th e indoor setting temperature or indoor ambient temperature When the indoor unit is first powered on it will display the setting te
51. e fluctuant Fig 27 Fig 26 8 7 Vacuum Pumping and Leak Detection 1 Use Vacuum Pump 1 Remove the valve caps on the liquid valve and gas valve and the nut of refrigerant charging vent 2 Connect the charging hose of piezometer to the refrigerant charging vent of gas valve and then connect the other charging hose to the vacuum pump 3 Open the piezometer completely and operate for 10 15min to check if the pressure of piezometer remains in 0 1MPa 4 Close the vacuum pump and maintain this status for 1 2min to check if the pressure of piezometer remains in 0 1MPa If the pressure decreases there may be leakage 5 Remove the piezometer open the valve core of liquid valve and gas valve completely with inner hexagon spanner 6 Tighten the screw caps of valves and refrigerant charging vent As show in Fig 28 Liquid valve Gas valve Refrigerant chargin vent Nut of refrigerant g Charging vent Vacuum pump Inner hexagon spanner E Fig 28 Installation and Maintenance 2 Leakage Detection 1 With leakage detector Check if there is leakage with leakage detector 2 With soap water If leakage detector is not available please use soap water for leakage detection Apply soap water at the suspected position and keep the soap water for more than 3min If there are air bubbles coming out of this position there s a leakage 8 8 Check aft
52. e not available in auto dehumidify fan mode press the Turbo button the fan speed displayed super high speed in the remote controller and the indoor fan rotates at super high speed 12 Health Function When the indoor fan motor is running the Health function is set by pressing remote controller If there is no Health button on the remote controller the health function opening is defaulted 13 I Feel Function If the remote controller receives the Feel order the controller will work at the ambient temperature value which is sent by remote controller Except the defrosting and anti cool wind which still adopts the sampling value of AC itself ambient temperature sensor the remote controller will send ambient temperature value to controller every 10mins After 11mins if the controller hasn t received the ambient temperature value from the remote controller for long time then it will run according to the current ambient temperature of AC If the function has not been set the ambient temperature will adopt the sensor sampling value of AC itself If power off happens this function will not be memorized Troubleshooting of Temperature Sensor 1 Indoor Temperature Sensor 16 e Technical Information Service Manual Detect malfunctions of temperature sensor any time 2 Indoor Pipe Temperature Sensor In defrosting period the temperature sensor malfunction will not be detected 5 min after finishing defrosting the system begins t
53. e sub assy and valve cover of outdoor unit and then remove the cable cross plate sub assy and valve cover As show in Fig 21 2 Remove the screw cap of valve and aim the pipe joint at the bellmouth of pipe As show in Fig 22 Foot holes Fig 20 pipe Pipe joint 2 B Liquid gas pipe gas valve lt Union nut Fig 22 3 Pretightening the union nut with hand 4 Tighten the union nut with torque wrench Refer to the following table for wrench moment of force Hex nut diameter inch Tightening torque ftibf 01 4 11 14 7 03 8 22 8 29 5 332 406 44 3 47 9 51 6 55 3 5 8 3 4 28 Service Manual 5 Connect Outdoor Electric Wire 1 Put power connection wire and power wire through the wire passing hole 2 Remove the wire clip connect the power connection wire and power wire to the wiring terminal fix them with screws As show in Fig 23 3 Fix the power connection wire and power wire with wire clip 4 Install the cable cross plate sub assy cable cross plate sub assy UK NO 2 213 ga cord clam power conhect wire Indoor unit connection power wire Fig 23 A Note 1 After tightening the screw pull the power cord slightly to check if it is firm 2 Never cut the power c
54. echnician according to local regulations and the instructions given in this manual eBe caution during installation and maintenance Prohibit incorrect operation to prevent electric shock casualty and other accidents Warnings Electrical Safety Precautions 1 Cut off the power supply of air conditioner before checking and maintenance 2 The air condition must apply specialized circuit and prohibit share the same circuit with other appliances 3 The air conditioner should be installed in suitable location and ensure the power plug is touchable 4 Make sure each wiring terminal is connected firmly during installation and maintenance 5 Have the unit adequately grounded The grounding wire can t be used for other purposes 6 Must apply protective accessories such as protective boards cable cross loop and wire clip 7 The live wire neutral wire and grounding wire of power supply must be corresponding to the live wire neutral wire and grounding wire of the air conditioner 8 The power cord and power connection wires can t be pressed by hard objects 9 If power cord or connection wire is broken it must be replaced by a qualified person Installation and Maintenance 10 If the power or connection wire is not long enough please get the specialized power cord or connection wire from the manufacture or distributor Prohibit prolong the wire by yourself 11 For the air conditioner without plug a
55. ed with any other refrigerant Never have air remain in the refrigerant line as it may lead to rupture or other hazards 3 Make sure no refrigerant gas is leaking out when installation is completed 4 If there is refrigerant leakage please take sufficient measure to minimize the density of refrigerant 5 Never touch the refrigerant piping or compressor without wearing glove to avoid scald or frostbite Improper installation may lead to fire hazard explosion electric shock or injury 21 22 Service Manual Main Tools for Installation and Maintenance 1 Level meter measuring tape 2 Screw driver 4 Electroprobe 7 Electronic leakage detector 8 Vacuum pump 10 Pipe pliers pipe cutter 11 Pipe expander pipe bender i 3 Impact drill drill head electric drill 6 Torque wrench open end wrench inner hexagon spanner 9 Pressure meter 12 Soldering appliance refrigerant container Installation and Maintenance Service Manual 8 Installation 8 1 Installation Dimen Space to the wall At least 5 8 9 inch sion Diagram Space to the wall At least 5 8 9 incl At least 98 3 7 inch Space to the floor Se Ses 5 DL lt SS Installation and Maintenance At least 19 2 3 inch
56. er Installation and Test Operation 1 Check after Installation Check according to the following requirement after finishing installation Possible malfunction installed firmly emit noise Have you done the It may cause insufficient cooling refrigerant leakage test heating capacity Is heat insulation of It may cause condensation and pipeline sufficient water dripping It may cause condensation and Is water drained well water dripping 2 3 Is the voltage of power 5 supply according to the may cause malfunction or voltage marked on the damage the parts nameplate Is electric wiring and lbipeline installed It may cause malfunction or damage parts No Items to be checked correctly Is the unit grounded It may cause electric leakage securely Does the power cord It may cause malfunction or follow the specification damage the parts Is there any obstruction lt may cause insufficient cooling in air inlet and air outlet heating The dust and sundries caused It may cause malfunction or during installation are damaging the parts removed The gas valve and liquid 11 valve of connection pipe are open completely 0 It may cause insufficient cooling heating capacity 2 Test Operation 1 Preparation of test operation e The client approves the air conditioner installation e Specify the important notes for air conditioner to the
57. ero crossing Inspection Circuit Malfunction of the IDU Fan Motor U8 Installation and Maintenance Troubleshooting for U8 malfunction Re energize1 minute after de erergization U8 is still displayed Yes zero cross detection circuit of the mainboard is defined abnormal Replace the mainboard with the same model End No gt The unit returns to normal Conclusion U8 is displayed due to instant energization afte de energization while the capacitor discharges slowly 41 Service Manual 5 Malfunction of communication E6 Start Cut off power supply Check if connection line of IDU and ODU and the wire inside electric box are correctly connected Connect the line gt according to wiring diagram Malfunction eliminated Correct connection yes no Match correctly N0 PPiaccording to producti specification Malfunction eliminated with display board Main board of DU matches with that of ODU yes no Replace mmunication cord is damage eS gt communication alfunction eliminated yes cord no 4 v Replace IDU s main board yes Replace ODU s Malfunction eliminated Installation Maintenance 42 Service Manual
58. heck whether the thermal grease on IPM Module of outdoor control panel AP1 is sufficient and whether the radiator is inserted tightly If its no use please replace control panel AP1 Refer to the malfunction analysis overload high temperature resistant 1 Wiring terminal is loosened In normal state the resistance for this terminal should be less than 1ohm 2 Refer to the malfunction analysis discharge protection overload Installation and Maintenance Service Manual Malfunction Name Display Method of Indoor Unit Indicator Display during Dual g blinking ON 0 5s and OFF Power Indicator Cool Heating Indicator Indicator OFF 3S and blink 4 times Display Method of Outdoor Unit Indicator has 3 kinds of display status and during blinking ON 0 5s and OFF 0 5s Red Indicator status Possible Causes Yellow Green Indicator Indicator During cooling and drying operation compressor will stop while indoor fan will operate During heating operation the complete unit will stop operation Refer to the malfunction analysis overload high temperature resistant OFF 1S and blink 6 times Internal motor fan motor do not operate Failure start up Installation and Maintenance OFF 3S and blink 5 times OFF 3S and blink 5 times OFF 3S and blink OFF 3S and blink 7 times OFF 3S and blink 6 times and blink 23 times OFF 3S
59. ic expansion valve Remove malfunction Replace parts of outdoor electric box Remove malfunction Refrigerant leakage recharge the refrigerant Service Manual Y Adjust connecting wire Finish Installation and Maintenance Service Manual 9 3 2 way 3 way Valve Appearance 2 way Valve Liquid Side 3 way Valve Gas Side Hexagonal wrench 4mm Flare nut Open position Closed position To piping connection To outdoor unit Valve cap Flare nut piping connection Open position Closed position Service Service port port To outdoor unit Servicing Works Shaft position Shaft position Service port Shippi Closed Closed Closed Ipping with valve cap with valve cap with cap Air purging Closed Closed Open fo Installation clockwise clockwise with vacumm pump Open Open Closed O t with valve with valve cap with cap Pumping down Closed Open Open 2 Transfering clockwise counter clockwise connected Evacuation Open Open Open 3 Servicing Gas charging Open Open Open 4 Servicing with cylinder Pressure check Open 5 Servicing Open Open with charging cylinder Gas releasing Open 6 Open Open with charging cylinder Installation and Maintenance 47 Air purging CAUTION Do not leak the gas i
60. ing 8 6 Installation of Outdoor Unit 1 Fix the Support of Outdoor Unit Select it according to the actual installation situation 1 Select installation location according to the house structure 2 Fix the support of outdoor unit on the selected location with expansion screws 27 Note 1 sufficient protective measures when installing the outdoor unit 2 Make sure the support can withstand at least four times the unit weight 3 The outdoor unit should be installed at least 1 1 6inch above the floor in order to install drain joint As show in Fig 18 4 For the unit with cooling capacity of 2300W 5000W 6 expansion screws are needed for the unit with cooling capacity of 6000W 8000W 8 expansion screws are needed for the unit with cooling capacity of 10000W 16000W 10 expansion screws are needed Chassis Outdoor drain joirt Drain vent At least 1 1 6 inch above the floor Drain hose gt 222 Fig 18 Fig 19 2 Install Drain Joint Only for cooling and heating unit 1 Connect the outdoor drain joint into the hole on the chassis 2 Connect the drain hose into the drain vent As show in Fig 19 3 Fix Outdoor Unit 1 Place the outdoor unit on the support 2 Fix the foot holes of outdoor unit with bolts As show in Fig 20 Foot holes Screw Cable Cross Plate Sub assy f Valve Cover 4 Connect Indoor and Outdoor Pipes 1 Remove the screw on the right cable cross plat
61. irmly rong wire connection or poor Check the wiring status according to circuit Replace the capacity of fan Power voltage is a little low or Use universal meter to measure the power y high oltage The voltage is a little high or low 99 ge reg hen unit is on cooling heating performance Motor of outdoor unit is damaged bad and ODU compressor generates a lot of noise and heat Change compressor oil and refrigerant If no better replace the compressor with a new one 5 Compressor Can t Operate Discriminating method air conditioner status Troubleshooting Connect wires according to wiring diagram to make sure all wiring terminals are connected firmly rong wire connection or poor the wiring status according to circuit connection diagram Measure the capacity of fan capacitor with an Capacity of compressor is universal meter and find that the capacity is out of damaged the deviation range indicated on the nameplate of an capacitor Power voltage is a little low Use universal meter to measure the power esi ie wala wilh vellaae redulator high oltage The voltage is a little high or low 99 HE reg Use universal meter to measure the resistance Coil of compressor is burnt out Repair or replace compressor between compressor terminals and it s 0 Cylinder of compressor is blocked Compressor can t operate Repair or replace compressor 6 Air Conditioner
62. is Leaking Discriminating method air conditioner status Troubleshooting Drain pipe is blocked Water leaking from indoor unit Fa Drain pipe is broken Water leaking from drain pipe Replace drain pipe rapping is not tight COnnectioni place of Wrap it again and bundle it tightly 7 Abnormal Sound and Vibration Discriminating method air conditioner status Troubleshooting hen turn on or turn off the unit he panel and omer parts will There s the sound of PAPA Normal phenomenon Abnormal sound will lexpand and there s abnormal disappear after a few minutes sound hen turn on or turn off the unit here s abnormal sound due Normal phenomenon Abnormal sound will pn sound can be heard flow refrigerant inside air disappear after a few minutes conditioner Foreign objects inside the indoor Remove foreign objects Adjust all parts unit or there re parts touching There s abnormal sound fro indoor unit position of indoor unit tighten screws and stick ogether inside the indoor unit damping plaster between connected parts Foreign objects inside the outdoo Remove foreign objects Adjust all parts unit or there re parts touching There s abnormal sound fro outdoor unit position of outdoor unit tighten screws and ogether inside the outdoor unit stick damping plaster between connected parts Short circuit inside the magnetic During heating the way val
63. is unstable During cooling and drying operation the compressor will stop while indoor fan will operate During heating operating the complete unit will stop operation Theres circuit malfunction on outdoor units control panel AP1 please replace the outdoor units control panel AP1 1 Supply voltage is lower than AC175V 2 Wiring terminal 4V is loosened or If this malfunction occurs during heating operation the complete broken unit will stop operation 3 4V is damaged please replace 4 36 malfunction of outdoor unit Frequency limiting power Compressor running Frequency limiting module temperature OFF 3S and blink 18 times During cooling operation compressor will stop while indoor fan will operate during Replace outdoor control panel AP1 heating the complete unit will stop operation Installation and Maintenance Service Manual Malfunction Name Normal 53 communica tion T Display Method of Indoor Unit Display Method of Outdoor Unit Indicator Display during Indicator has 3 kinds of display Dual 8 blinking ON 0 55 and OFF status and during blinking Code 10 55 0 5s and OFF 0 5s Display Power Cool Heating Yellow Red Green Indicator Indicator Indicator Indicator Indicator Indicator OFF 0 55 and blink Installation and Maintenance Q status Defrosting will occur in heating mode Compressor
64. l Procedure of Intdoor Unit Steps Pints 1 External features ON OFF button is kept pushing for 5 seconds a forced cooling operation will be carried out for ap prox 15 minutes 2 Removing air filters Pull protrusions on left a and right sides of panel with fingers and open front panel all the way Lift center section of air filter and disengage hooks Air filter and right filters are interchangeable To re install insert air filter along the guide Remove air filter by pulling forward 60 Installation and Maintenance Service Manual 3 Opening and shutting front panel Draw out the axial bush Bend the horizontal louver slightly and then remove it Support the front panel by one hand while remove the rotation axis at the upper center by the other hand Guide Louver Hook a finger onto the projection part provided on the both sides of the and right filters I m T interchangeable up the panel to the e position higher than it To re install insert air filter will stop along the guide Remove the front panel from the unit Installation and M
65. l when Stopped Fan OFF delay for 60 seconds must be made when the compressor is stopped Tap Control in indoor outdoor unit silent operation 1 When Cooling Operation When the outdoor air temperature is lower than 99 F the fan tap must be set to L 2 When Heating Operation When the outdoor air temperature is higher than 39 F the fan tap must be turned to L only for heat pump model Refrigerant Recycling Function applicable when changing installation location or in maintenance 1 Enter refrigerant recycling function Within 5min after energizing unit ON or OFF status is ok continuously press LIGHT button for 3 times within 3s to enter refrigerant recycling mode Fo is displayed and refrigerant recycling function is started At this moment the maintenance people closes liquid valve After 5min stick the thimble of maintenance valve with a tool If there is no refrigerant spraying out close the gas valve immediately and then turn off the unit to remove the connection pipe 2 Exit refrigerant recycling function After entering refrigerant recycling mode when receive any remote control signal or enter refrigerant recycling mode for 25min the unit will exit refrigerant recycling mode automatically If the unit is in standby mode before refrigerant recycling it will be still in standby mode after finishing refrigerant recycling if the unit is in ON status before refrigerant recycling it will still run in original operation mode
66. lose In heating mode if the swing function is not set the horizontal louver will rotate to maximum in clockwise direction Then it will 15 Service Manual rotate to place D Under other state the horizontal louver will rotate to level L If the swing function is set 0 0 when starting the unit the horizontal louver will swing between place L there 7 states for the louver in Place L Place A Place B Place C Place D and swing between Place L and place D stop in any place between Place L and place D When the unit is turned off the louver will stay in place 0 The swing is available only when the swing function is set and the indoor fan is running Note When place L to B place A to C and place B and D is set the horizontal louver will swing between place L to D L A B C D 8 Sleep Function Sleeping mode is available only in cooling and heating modes D Cooling mode at the base of initial set temperature by remote controller the set temperature will increase automatically according to people s coziness within several hours after setting sleep function Heating mode at the base of initial set temperature by remote controller the set temperature will decrease automatically according to people s coziness within several hours after setting sleep function 9 Timer Function The main board has general timer function and clock function The timer function can be sele
67. mperature if the temperature s display status is changed from other status to 7 displays the ambient temperature 5s later or within 5s it receives other remote control signal that will return to display the setting temperature if the users haven t set up the temperature displaying status that will display the setting temperature This function is not applicable for some models 12 TIMER OFF button Press this button to initiate the auto off timer To cancel the auto timer program simply press the button again TIMER OFF setting is the same as TIMER ON Technical Information 13 Service Manual 14 13 TURBO button Press this button to activate deactivate the Turbo function which enables the unit to reach the preset temperature in the shortest time In COOL mode the unit will blow strong cooling air at super high fan speed In HEAT mode the unit will blow strong heating air at super high fan speed This function is not applicable for some models 14 SLEEP button Press this button to go into the SLEEP operation mode Press it again to cancel this function This function is available in COOL or DRY mode to maintain the most comfortable temperature for you 15 LIGHT button Press LIGHT button to turn on the display s light and press this button again to turn off the display s light If the light is turned on 9 is displayed If the light is tunrned off 9 disappears Combination A w buttons About lock
68. mperature becomes higher than a certain level model by model 2 In case the operation mode is heating The current droops when outdoor air temperature becomes higher than a certain level model by model Freeze up Protection Control Outline During cooling operation the signals being sent from the indoor unit allow the operating frequency limitation and then prevent freezing of the indoor heat exchanger The signal from the indoor unit must be divided into the zones as the followings Detail 1 Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 sec from operation start 2 Control in Each Zone Heat exchanger thermistor temperature Return Reset zone Up zone Keep zone Drooping zone Stop zone Technical Information Service Manual Heating Peak cut Control Outline Heat Pump Only During heating operation the signals being sent from the indoor unit allow the operating frequency limitation and prevent abnormal high pressure The signal from the indoor unit must be divided as follows Detail 1 Conditions for Start Controlling Judge the controlling start with the indoor heat exchanger temperature after 2 sec from operation start 2 Control in Each Zone The heat exchange intermediate temperature of indoor unit controls the following Stop zone Drooping zone Keep zone Up zone Heat exchanger thermistor temperature Reset zone
69. mpressor and Fittings 69700268 69700268 2 9 Electric Expansion Valve Sub 69700288 69700009 w ecer amu 1 7 697009 69700011 1 12 67000 67026 1 13 69700011 69700272 1 14 Cable Cross 69700286 69700014 1 Cable Cross 69700276 697004 1 16 Right Side Plate Assy 69700272 69700279 1 17 CoverofPassWie 69700014 6970078 1 Electric Expand Valve Fitting 69700291 69700213 1 Temperature Sensor N Temperature Sensor 69700283 1 69700213 69700269 Motor Support Spot Weld 69700026 69700277 Electric Box Cover Sub Ass Electric Box Assy 69700287 69700273 Terminal Board 69700196 69700280 Front Grill 69700000 69700281 18 19 20 21 22 23 24 25 26 27 28 29 288 16 18 22 23 24 25 28 29 30 31 32 33 33 34 35 Above data is subject to change without notice Installation and Maintenance Q Service Manual 11 Removal Procedure Warning sure to wait for minimum of 20 minutes after turning off all power supplies and discharge the refrigerant completely before removal 11 1 Remova
70. n air switch must be installed in the circuit The air switch should be all pole parting and the contact parting distance should be more than 1 8 inch 12 Make sure all wires and pipes are connected properly and the valves are opened before energizing 13 Check if there is electric leakage on the unit body If yes please eliminate the electric leakage 14 Replace the fuse with a new one of the same specification if it is burnt down don t replace it with a cooper wire or conducting wire 15 If the unit is to be installed in a humid place the circuit breaker must be installed Installation Safety Precautions 1 Select the installation location according to the require ment of this manual See the requirements in installation part 2 Handle unit transportation with care the unit should not be carried by only one person if it is more than 44 095 3 When installing the indoor unit and outdoor unit a suffi cient fixing bolt must be installed make sure the installation support is firm 4 Ware safety belt if the height of working is above 78 3 4 inch 5 Use equipped components or appointed components dur ing installation 6 Make sure no foreign objects are left in the unit after fin ishing installation Refrigerant Safety Precautions 1 Avoid contact between refrigerant and fire as it generates poisonous gas Prohibit prolong the connection pipe by welding 2 Apply specified refrigerant only Never have it mix
71. n the air during Air purging Procedure 1 Connect the charge hose from the manifold valve to the service port of the gas side packed valve 2 Connect the charge hose to the port of the vacuum pump 3 Open fully the low pressure side handle of the gauge man ifold valve 4 Operate the vacuum pump to begin evacuating Perform evacuating for about 15 minutes if the piping length is 20 me ters 15 minutes for 20 meters assuming a pump capacity of 27 liters per minute Confirm that the compound pressure gauge reading is 101 kPa 76 cmHg 5 Close the low pressure valve handle of gauge manifold Check the flare connections for gas leakage 6 Use torque wrench to tighten the service port nut to a torque of 1 8kg cm 7 Set the 3 way valve to the back seat 8 Mount the valve stem nuts to the 2 way and 3 way valves 9 Check for gas leakage At this time especially check for gas leakage from the 2 way and 3 way valves stem nuts and from the service port nut 48 Service Manual Outdoor unit CAUTION If gas leakage are discovered in step 5 above take the following mesures If the gas leaks stop when the piping connections are tightened further continue working from step 6 If the gas leaks do not stop when the connections are retightened repair the location of the leak discharge all of the gas through the service port and then recharge with the specified amount of gas from a gas cyli
72. nder Installation and Maintenance Service Manual Pumping Down Outdoor unit Purge the air Procedure 1 Confirm that both the 2 way and 3 way valves are set to the open position Remove the valve stem caps and confirm that the valve stems are in the raised position Be sure to use a hexagonal wrench to operate the valve stems 2 Operate the unit for 10 to 15 minutes 3 Stop operation and wait for 3 minutes then connect the charge set to the service port of the 3 way valve Connect the charge hose with the push pin to the service port 4 Air purging of the charge hose Open the low pressure valve on the charge set slightly to air purge from the charge hose 5 Set the 2 way valve to the closed position 6 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 1kg cm g Installation and Maintenance 7 Immediately set the 3 way valve to the closed position Do this quickly so that the gauge ends up indicating 3 to 5kg cm g 8 Disconnect the charge set and mount the 2 way and 3 way valves stem nuts and the service port nut Use torque wrench to tighten the service port nut to a torque of 1 8 kg m Be sure to check for gas leakage 49 Re air Purging Service Manual Outdoor unit Procedure 1 Confirm that both the liquid side valve and the gas side valve are set
73. ng unit Connecting 13 Owner s manual cable power cord remote controller 7 _ Wal pipe Note 1 Please contact the local agent for installation 2 Don t use unqualified power cord 8 3 Selection of Installation Location 1 Basic Requirement Installing the unit in the following places may cause malfunction If it is unavoidable please consult the local dealer 1 The place with strong heat sources vapors flammable or explosive gas or volatile objects spread in the air 2 The place with high frequency devices such as welding machine medical equipment 3 The place near coast area 4 The place with oil or fumes in the air 5 The place with sulfureted gas 6 Other places with special circumstances 2 Indoor Unit 1 There should be no obstruction near air inlet and air outlet 2 Select a location where the condensation water can be dispersed easily and won t affect other people 3 Select a location which is convenient to connect the outdoor unit and near the power socket 4 Select a location which is out of reach for children 5 The location should be able to withstand the weight of indoor unit and won t increase noise and vibration 6 The appliance must be installed 98 3 7inch above floor 7 Don t install the indoor unit right above the electric appliance 8 The appliance shall not be installed in the laundry 3 Outdoor Unit 1 Select a location where the noise
74. o detect the temperature sensor malfunction In other times the temperature sensor malfunction will be detected 3 Protection of Temperature Sensor 1 When short circuit occurs to the temperature sensor for 30s The temperature sensor overheats In this case the complete unit will stop for protection At the same time the temperature protection and temperature sensor malfunction will be shown 2 When break circuit occurs to the temperature sensor for 30s The unit will stop and the temperature sensor malfunction will be displayed Frequency Control Frequency Initial Setting lt Outline gt When starting the compressor or when conditions are varied due to the change of the room the frequency must be initialized accordingto the AD value of the indoor unit and the value of the indoor unit Q value Indoor unit output determined from indoor unit volume air flow rate and other factors PI Control Determine Frequency Up Down by AD Signal 1 control Calculate value in each sampling time 20 seconds and adjust the frequency according to its difference from the frequency previously calculated 2 1 controllf the operating frequency is not change more than a certain fixed time adjust the frequency up and down according to the A D value obtaining the fixed AAD value When the AD value is small lower the frequency When the AD value is large increase the frequency 3 Frequency management when other controls are functioningWhen frequency
75. onnection wire to prolong or shorten the distance 3 The connecting wire and connection pipe cannnot touch each other 4 Top cover of outdoor unit and electric box assembly should be fixec by the screw Otherwise it can cause a fire or short circuit caused by water or dust Install the over line pipe hole 7 Fixed nut Finish 6 Neaten the Pipes 1 The pipes should be placed along the wall bent reasonably and hidden possibly Min semidiameter of bending the pipe is 4inch 2 If the outdoor unit is higher than the wall hole you must set a U shaped curve in the pipe before pipe goes into the room in order to prevent rain from getting into the room As show in Fig 24 A The drain hos III HA Fig 24 U shaped Fig 25 5 Installation and Maintenance Service Manual Note 1 The through wall height of drain hose shouldn t be higher than the outlet pipe hole of indoor unit As show in Fig 25 2 Slant the drain hose slightly downwards The drain hose can t be curved raised and fluctuant etc As show in Fig 26 3 The water outlet can t be placed in water in order to drain smoothly As show in Fig 27 x The drain hose can t be fluctuant h G The water outlet can t be placed The drain hose can t be fluctuant X in water The water outlet can t b
76. or Unit Motor RLA 0 17 10 2 c Air Flow Volume Outdoor Unit 1059 Axial flow Axial flow inch 15 10 13 15 10 13 5 Defrosting Method Auto Defrosting EE 0 Moisture Protection o als a lt 5 Q lt o o 5 Design Pressure Low PSIG 240 240 Sound Pressure Level H M L 55 Sound Power Level H M L 65 Dimension WXHXD 33 2 5 21 1 4 12 3 5 Dimension of Carton Box LXWXH 34 4 7X14 1 6X22 5 6 34 2 3X14 2 7X23 3 7 68 Dimension of Package LXWXH inch Net Weight b Gross Weight b Refrigerant Refrigerant Charge Gas Additional Charge oz ft Connecti Outer Diameter Liquid Pipe on Pipe Diameter Gas Pipe Max Distance Height Max Distance Length The above data is subject to change without notice Please refer to the nameplate of the unit O Technical Information Service Manual 2 2 Operation Characteristic Curve Heating Cooling 1 L o I 1 1 nc kaans Paseal 1 1 nS We s za Ou mx lt 22 Ulo 1 c Q Q 1 1 1
77. plete unit will stop 1 Measure the voltage of position L and N on wiring board XT if the voltage is higher than 265VAC turn on the unit after the supply voltage is increased to the normal range 2 the AC input is normal measure the voltage of electrolytic capacitor C on control panel 1 if its normal theres malfunction for the circuit please replace the control panel AP1 1 Measure the voltage of position L and N on wiring board XT if the voltage is higher than 150VAC turn on the unit after the supply voltage is increased to the normal range 2 If the AC input is normal measure the voltage of electrolytic capacitor C on control panel 1 if its normal theres malfunction for the circuit please replace the control panel AP1 during during Compressor blinking blinking Min ON ON Showing during min cooling or frequence in 0 25s 0 25s min heating test test state and OFF and OFF 0 25s during during Compressor blinking blinking 24 rated ON ON Showing during nominal cooling or frequence in 0 25s 0 25s nominal heating test test state and OFF OFF 0 25s 0 25s during during Compressor blinking blinking maximum ON ON Showing during max cooling or 25 2 frequence 0 25 0 255 heating test test state and OFF 0 25s 0 25s Installation and Maintenance 33 34 of module temperature sensor circuit protection fo
78. r compressor Display Method of Outdoor Display Method of Indoor Unit Unit Indicator has 3 kinds of display status and during blinking ON 0 5s and OFF 0 5s Indicator Display during 3 times 8 times status During cooling and drying operation compressor will stop while indoor fan will operate During heating operation the complete unit will stop operation During cooling and drying operation compressor will stop while indoor fan will operate During heating operation the complete unit will stop During cooling and drying operation compressor will stop while indoor fan will operate During heating operation the complete unit will stop During cooling operation compressor will stop while indoor fan will operate During heating operation the complete unit will stop All loads operate normally while operation frequency for compressor is decreased During cooling and drying operation compressor will stop while indoor fan will operate During heating operation the complete unit will stop operation Service Manual Possible Causes Showing during middle cooling or middle heating test Refer to the malfunction analysis IPM protection loss of synchronism protection and overcurrent protection of phase current for compressor Refer to the part three charging malfunction analysis of capacitor Replace outdoor control panel AP 1 After the complete unit is de energized for 20mins c
79. r 32 81ft at the basis of standard length you should add 5ml of refrigerant oil for each additional 16 40ft of connection pipe e The calculation method of additional refrigerant charging amount on the basis of liquid pipe 12000 Btu h 3516 W 18000 Btu h 5274 W 80 028 32 818 24000 Btu h 7032 80 028 32 818 98 438 32 818 28000 Btu h 8204 36000 Btu h 10548 W 98 43ft 65 62ft 42000 Btu h 12306 W 98 43ft 65 62ft 98 43ft 65 62ft 48000 Btu h 14064 W e When the length of connection pipe is above 16 40ft add refrigerant according to the prolonged length of liquid pipe The additional refrigerant charging amount per meter is different according to the diameter of liquid pipe See the following sheet e Additional refrigerant charging amount prolonged length of liquid pipe X additional refrigerant charging amount per meter Additional refrigerant charging amount for R22 R407C R410A and R134a Liquid pipe inch Gas pipe inch Cooling only oz ft Cooling and heating oz ft 1 4 1 4 or 93 8 1 2 05 8 03 4 07 8 3 4 or 7 8 1 1 4 70 Installation and Maintenance Service Manual Appendix 3 Pipe Expanding Method Note Improper pipe expanding is the main cause of refrigerant leakage Please expand the pipe according to the following steps 90 the pip e Confirm the pipe length according to the distance of indoor unit and outdoor unit
80. re whether the output voltage on control terminal for PG motor is morethan 50V within 1 min after the louvers are opened Measure the voltage of this foot to neutral no wire on the mainboard lt no v Replace the mainboard with the same model 4 Insert the control terminal of PG motor tightly yes 5 malfunction eliminated v Reinstall the blade and motor correctly Is malfunction eliminated yes yes Is the motor started up no Y Replace PG motor Is malfunction yes eliminated yes End Installation and Maintenance 39 Service Manual 3 Malfunction of Protection of Jumper Cap C5 T roubleshooting for C5 a malfunction Is there jumper cap on the mainboard Appearance of no JN the jumper cap Assemble the jumper cap with the same model yes Is malfunction no eliminated Is the jumper cap inserted correctly and tightly Insert the jumper cap tightly yes yes gt Y Replace the jumper with the same model yes Is malfunction yes gt eliminated Y Replace the mainboard with the same model b 40 Installation and Maintenance Service Manual 4 Malfunction of Z
81. remote controller or buttons have no action After energization room circuit breaker trips off at Electric leakage for air conditione once Replace batteries for remote controller Repair or replace remote controller 2 Poor Cooling Heating for Air Conditioner Possible Causes Discriminating Method Air conditioner Status Troubleshooting Set temperature is improper Observe the set temperature on remote controller Adjust the set temperature Rotation speed of the IDU fan motor is set too law Small wind blow Set the fan speed at high or medium Filter of indoor unit is blocked Check the filter to see it s blocked Clean the filter Installation position for indoor unit 2 70 Adjust the installation position and install the land outdoor unit is improper 1 q rainproof and sunproof for outdoor unit Discharged air temperature during cooling is higher than normal discharged wind temperature Discharged air temperature during heating is Find out the leakage causes and deal with it lower than normal discharged wind temperature Add refrigerant Unit s pressure is much lower than regulated range Malfunction of 4 way valve Blow cold wind during heating Replace the 4 way valve Discharged air temperature during cooling is higher than normal discharged wind temperature Discharged air temperature during heating is Malfunction of capillary lower than normal discharged wind temperature Replace the capillary Unit t pres
82. retainer will not touch the harness same as the existing models Take care not to losw the clip of thermistor Heat exchanger thermistor 63 Service Manual Steps Procedure 7 Remove piping fixture Remove Pipe Clamp Auxiliary piping Piping fixture Auxiliary piping Adjust the pipeline slightly sats gt Loosen the screws Heat exchanger in the right and the left which fix the Evaporator Assy Remove Evaporator Ml lt Installation Maintenance 64 Service Manual ue 8 Remove the pressure plate of motor pressure plate of motor Remove screws of motor press plate and then remove the motor press plate S f em C MES 9 Remove shaft cushion rubber base Shaft cushion rubber base Remove motor blade shaft cushion rubber ra Remove screws cross hn flow blade and then EE remove the motor Installation and Maintenance 65 Service Manual Caution discharge the refrigerant completely before removal Cable Cross Plate sub assy Valve Cover Installation and Maintenance 11 2 Removal Procedure of Outdoor Uni Top
83. roximately 1 minute and then repeat the of 1 8 kg m procedure pumping down pin Be sure to check for gas leakage Note The information above is for reference only Installation and Maintenance 53 Service Manual 9 4 Troubleshooting for Normal Malfunction 1 Air Conditioner Can t be Started Up Possible Causes Discriminating Method Air conditioner Status Troubleshooting Confirm whether it s due to power failure If yes No power supply or poor After energization operation indicator isn t bright for power recovery If not check power connection for power plug the buzzer can t give out sound supply circuit and make sure the power plug is connected well rong wire connection between indoor unit and outdoor unit Under normal power supply circumstances or poor connection for wiring operation indicator isn t bright after energization erminals Check the circuit according to circuit diagram and connect wires correctly Make sure all wiring terminals are connected firmly Make sure the air conditioner is grounded reliably Make sure wires of air conditioner is connected correctly Check the wiring inside air conditioner Check hether the insulation layer of power cord is damaged if yes place the power cord for air switch is fter energization air switch trips off Select proper air switch After energization operation indicator is bright Malfunction of remote controller While no display on
84. s OFF 3S and blink 8 times OFF 1S and blink 5 times OFF 1S and blink 7 times OFF 1S and blink 3 times During cooling and drying operating compressor stops while indoor fan operates During heating operation the complete unit will stop operation During cooling and drying operation compressor stops while indoor fan will operate During heating operation the complete unit will stop operation During cooling and drying operation compressor will sop after operating for about 3 mins while indoor fan will operate During heating operation the complete unit will stop after operating for about 3 mins All loads operate normally while operation frequency for compressor is decreased All loads operate normally while operation frequency for compressor is decreased Outdoor temperature sensor hasnt been connected well or is damaged Please check it by referring to the resistance table for temperature sensor Outdoor temperature sensor hasnt been connected well or is damaged Please check it by referring to the resistance table for temperature sensor 1 Outdoor temperature sensor hasnt been connected well or is damaged Please check it by referring to the resistance table for temperature sensor 2 The head of temperature sensor hasnt been inserted into the copper tube Refer to the malfunction analysis overload high temperature resistant The input supply voltage is too low Sy
85. stem pressure is too high and overload Installation and Maintenance Service Manual Display Method of Indoor Unit Indicator Display during Dual g blinking ON 0 55 and OFF 0 5s Power Cool Indicator Indicator Malfunction Name Heating Indicator Decrease frequency due to OFF 3S high air discharge Limit decrease OFF 3S OFF 3S and blink and blink 2 times 2 times frequency due to antifreezing and blink 9 times Display Method of Outdoor Unit Indicator has 3 kinds of display status and during blinking ON 0 5s and OFF 0 5s Yellow Green Indicator Indicator Indicator OFF 1S and blink 4 times status All loads operate normally while operation frequency for compressor is decreased All loads operate normally while operation frequency for compressor is decreased Possible Causes Overload or temperature is too high Refrigerant is insufficient Malfunction of electric expansion valve EKV Poor air return in indoor unit or fan speed is too low Voltage for DC bus bar is too high OFF 3S and blink 21 times Voltage of DC bus bar is too low During cooling and drying operation compressor will stop while indoor fan will operate During heating operation the complete unit will stop operation During cooling and drying operation compressor will stop while indoor fan will operate During heating operation the com
86. sure is much lower than regulated range If refrigerant isn t leaking part of capillary is blocked Flow volume of valve is pressure of valves is much lower than that insufficient stated in the specification P petey Malfunction of horizontal louver louver can t swing 2 Malfunction of the IDU motor The IDU fan motor can t operate Refer to troubleshooting for H6 for maintenance method in details Malfunction of the ODU fan motor The ODU fan motor can t operate 2 point 4 of maintenance method for Malfunction of compressor Compressor can t operate 5 point of maintenance method Tor 3 Horizontal Louver Can t Swing Possible Causes Discriminating Method Air conditioner Status Troubleshooting Connect wires according to wiring diagram to make sure all wiring terminals are connected firmly Refrigerant is leaking rong wire connection or poor Check the wiring status according to circuit connection diagram tepping motor is damaged Stepping motor can t operate Repair or replace stepping motor Others are all normal while horizontal louver can t operate Main board is damaged Replace the main board with the same model 54 Installation and Maintenance Service Manual 4 ODU Fan Motor Can t Operate Discriminating method air conditioner status Troubleshooting Connect wires according to wiring diagram to make sure all wiring terminals are connected f
87. switch must be installed in the line The air switch should be all pole parting and the contact parting distance should be more than 1 8inch Installation and Maintenance 8 1 Bind up the connection pipe power cord and hose with the band As show in Fig 14 2 Reserve a certain length of drain hose and power cord for installation when binding them When binding to a certain degree separate the indoor power and then separate the drain hose As show in Fig 15 3 Bind them evenly 4 The liquid pipe and gas pipe should be bound separately at the end Indoor and outdoor power cor A Gas Indoor Fig 14 Connection pipe Drain hose Band 29 15 Indoor power cord N Note 1 The power cord and control wire can t be crossed or winding 2 The drain hose should be bound at the bottom 9 Hang the Indoor Unit 1 Put the bound pipes in the wall pipe and then make them pass through the wall hole 2 Hang the indoor unit on the wall mounting frame 3 Stuff the gap between pipes and wall hole with sealing gum 4 Fix the wall pipe As show in Fig 16 5 Check if the indoor unit is installed firmly and closed to the wall As show in Fig 17 a eS Indoor Outdoor Wall pipe Fig 17 Sealing gum Upper hook Fig 16 Lower hook of wall mounting frame N Note Do not bend the drain hose too excessively in order to prevent block
88. uid Installation and Maintenance 69 Appendix 1 Reference Sheet of Celsius and Fahrenheit Conversion formula for Fahrenheit degree and Celsius degree Tf Tcx1 8 32 Set temperature Fahrenheit display temperature CF Fahrenheit display temperature CF Fahrenheit CF Fahrenheit Celsius 60 8 Service Manual Fahrenheit display temperature CF Fahrenheit Celsius 6 7 9 0 86 86 2 Celsius un n pp 6 Fahrenheit display temperature CF Fahrenheit display temperature CF 59 15 68 20 71 6 22 73 4 23 75 2 24 77 25 Fahrenheit display temperature Fahrenheit Celsius 1 896 52 9 986 3 87 8 7 10 11 50 51 8 53 6 Appendix 2 Configuration of Connection Pipe Max length of Max height Cooling capacity connection pipe difference 5000 Btu h 1465 W 49 21ft 16 40ft 7000 Btu h 2051 W 49 21ft 16 40ft 9000 Btu h 2637 W 49 21ft 32 81ft 65 62ft 32 81ft 1 Standard length of connection pipe e 16 40ft 24 61ft 26 25ft 2 Min length of connection pipe is 9 84ft 3 Max length of connection pipe and max high difference 4 The additional refrigerant oil and refrigerant charging required after prolonging connection pipe e After the length of connection pipe is prolonged fo
89. utton to increase set temperature Hold it down for 2 seconds or more to rapidly increase set temperature In AUTO mode set temperature is not adjustable 4 FAN AUTO button This button is used for setting Fan Speed in the sequence that goes from AUTO tO then back to Auto 4d L4 lowspeed Medium speed ag ff High speed 5 MODE button Each time you press this button a mode is selected in a sequence that goes from AUTO COOL DRY FAN and HEAT as the following AUTO COOL DRY HEAT COTE TF Note Only for models with heating function After energization AUTO mode is defaulted In AUTO mode the set temperature will not be displayed on the LCD and the unit will automatically select the suitable operationn mode in accordance with the room temperature to make indoor room comfortable 6 SENSOR SAVE button Press this button to turn on SENSOR SAVE function Saves room ambient temperature and automatically adjusts maintaining that room ambient until pressed again which cancels the SENSOR SAVE function 7 CLOCK button Pressing CLOCK button blinks Within 5 seconds pressing or button adjusts the present time Holding down either button above 2 seconds increases or decreases the time by 1 minute every 0 5 second and then by 10 minutes every 0 5 second During blinking after setting press CLOCK button again to confirm the setting and then will be constantly displaye
90. ve has abnormal Replace magnetic coil coil lelectromagnetic sound Abnormal shake of compressor Outdoor unit gives out abnormal sound compresse tighten the bolts add too much refrigerant during maintenance Abnormal sound inside the compressor please reduce refrigerant properly Replace compressor for other circumstances Replace the compressor capacitor Abnormal sound inside the Installation and Maintenance 55 Service Manual 10 Exploded View and Parts List 10 1 Indoor Unit MWMO09Y1J MWM12Y1J Installation and Maintenance 56 Service Manual uu Part Code No Description Qty MWM09Y1J MWM12Y1J 22222 Filter Sub Ass 69700337 1 67097 2 _ ScrewCover 69700338 697008 1 Membrane 69700339 7 6970039 1 _ Front Case Assy 69700340 6970054 1 695904 69700341 1 7 Helicoid Tongue 69700342 6970042 1 AirLowver 69700330 6970030 2 ShaftofGuidelouver 69700343 6970043 2 Drainage Pipe Sub assy _ 69700344 6004 1 l Rear Case assy 69700345 697005484 1 Mounting Frame 69700346 S 69700340 1 Evaporator Support 69700352 7 697032 1 68700159 6870059 1 Bearing Holder 69700353 6970094 1 Axil Bush Sub assy 6970034 697003 1
91. will operate while indoor fan will stop operation Possible Causes Its the normal state 37 Service Manual 9 2 Troubleshooting for Main Malfunction 1 Malfunction of Temperature Sensor F1 F2 i Troubleshooting for F1 F2 malfunction Is the wiring terminal between the temperature sensor andthe controller loosened or poorly contacted Insert the temperature sensor tightly malfunctio eliminated yes no Is there short circuit due to trip over of the parts Make the parts upright no pt 4 eliminated Is the emperature sensor normal accordin to the Resistance Table no 4 v Replace it with a temperature sensor with the same model yes 4 Is malfunction Replace the mainboard with the same model yes Installation Maintenance 38 Service Manual 2 Malfunction of Blocked Protection of IDU Fan Motor H6 Troubleshooting for H6 malfunction Stir the blade with a tool to see whether the blade rotates oy Tighten the screw reassemble the blade motor and shaft bearing rubber base sub assy to make sure there is no foreign object between them Check if the connectiol of PG motor control yes Turn on the init again measu

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