Technical service manual 2007
Contents
1. Compressor refrigeration distributor 1 drive 2 system SV1 Primary four way valve SV2 Secondary four way valve PMV1 PMV2 Electronic expansive valve T1 T2 Indoor pipe temperature sensor xx Condenser See Evaporator Four way valve M Compressor 1 drive 1 system Notice For 1 drives 2 system there are two individual refrigerant circuit and two compressors but for the Idrive 2 system in the 1 drive 3 system there is only one refrigerant circuit and only one compressor 222 R series service manual 6 Wiring diagram 6 1 Indoor unit Indoor unit INDOOR ROOM TENPERATURE SENSOR PIPE TEMPERATURE BLACK SENSOR guvog AVIdSId rc TO ANION 1 2 N 3 4 at TRANSFORMER GENERATOR IL Q Q TO OUTDOOR UNIT 4 223 R series service manual 6 2 Outdoor unit FUNCTION OF SWITCH SW1 EXPLA NATION E rm FA PIDLY CHECK CHECK ITSELF WIRING DIAGRAM OUTDOOR FAN OUTDOOR UNIT CAFACIION OUTDOOR 2 CONPRESSORCAPACITOR ASBSY STEMPIPE TEMPERATURE SENSOR A amp B SYSTEM ROOM TEMPERATURE SENSOR CONNECTORS CONNECTORS TRANSFORMER POWER FROM INDOOR UNIT A FROM INDOOR UNIT B For 1 drive 2 outdoor unit 224 R series service manual HOSNIS 3rd 3d WAL IILLOHHL SUNS SIH HMOT ZH bY Na31SAS Ana isnray ZhANd2. 7 2 4 Indoor room temp sensor or evaporator temp sensor is open circuit or short circuit Is the indoor fan motor connector and connection good YES Is voltage being applied to the fan motor Indoor PCB is defective rang 90v 160v between mid Replace the indoor PCB pin and N on CN1 NO Repair the connector and reconnect Replace the indoor fan motor When outdoor pipe temp is more than 65 C the unit will stop and unit runs again when outdoor pipe 7 2 5 High temp Protect of condenser temp less than 52 C Is the temp more than 65 C Yes 7 2 6 Temp Sensor in condenser is open circuit or short circuit Is the outdoor temperature NO Repair the connector and sensor connector and reconnect connection good Replace the Sensor and 1 Replace outdoor e box check if ES display again 227 R series service manual 8 Electronic functions 8 1 Electric Control working environment 8 1 1 Input voltage 175 253V 8 1 2 Input power frequency 50Hz 60Hz 8 1 3 Ambient temperature 7 C 43 C 8 1 4 Indoor fan normal working amp is less than 1A 8 1 5 Outdoors fan normal working amp is less than 1 5A 8 1 6 Four way valve normal working amp is less than 1A 8 1 7 Swing motor DC12V 8 1 8 Display board 10 1 Display board ON OFF indicator 5 This indicator ill
3. 3 41 5878 24 10 4736 51 3 3185 2 39 8239 25 10 52 3 1918 1 37 1988 26 9 5507 53 3 0707 0 35 2024 27 9 1245 54 2 959 1 33 3269 28 8 7198 55 2 8442 2 31 5635 29 8 3357 56 2 7382 3 29 9058 30 7 9708 57 2 6368 4 28 3459 31 7 6241 58 2 5397 5 26 8778 32 7 2946 59 2 4468 6 25 4954 33 6 9814 60 2 3577 7 24 1932 34 6 6835 61 2 2725 8 22 5662 35 6 4002 62 2 1907 9 21 8094 36 6 1306 63 2 1124 10 20 7184 37 5 8736 64 2 0373 11 19 6891 38 5 6296 65 1 9653 12 18 7177 39 5 3969 66 1 8963 13 17 8005 40 5 1752 67 1 830 14 16 9341 41 4 9639 68 1 7665 15 16 1156 42 4 7625 69 1 7055 16 15 3418 43 4 5705 70 1 6469 234
4. Automatic operation mode 8 10 1 The air conditioner automatically selects one of the following operation modes cooling heating or ventilation according to the difference between room temp TA and set temp TS TA TS Operation mode TA TS gt 20 Cooling 11 lt 5 lt 2 1 Fan only TA TS lt 10 Heating Fan only for cooling only type 8 10 2 The indoor fan blows automatically in corresponding selected mode 8 10 3 The motion of indoor fan s vane should accord with the selected operation mode 8 10 4 One mode should be carried out for at least 15 minutes once selected If the compressor cannot start for 15 minutes reselect the operation mode according to the room temp and set temp or reselect when the set temp varies 8 11 Forced cooling function 8 11 1 Select forced cooling function with the forced cooling button or the switch 8 11 2 The compressor is unconditionally turned on after 30 minutes cooling operation whose fan mode is set as low the A C operates under the DRY mode with a set temp of 240 8 11 3 All protections of remote control cooling are available under forced cooling operation 8 12 Forced Auto function Select forced auto function with the forced auto button or the switch in the display board In forced auto status the A C operates under remote control mode with a set temp of 240 232 8 13 8 14 8 14 1 8 14 2 8 14 3 8 14 4 R series service manual Timer Fun
5. high temperature protection fan off temperature TE9 Evaporator high temperature protection restoring temperature T3 Outdoor unit pipe sensor T4 Outdoors temperature sensor 8 3 Systematic functions Remote receiving Testing and forced run Position set for indoor unit wind vane LED display and alarm On or off Timer Protection for the compressor High temperature protection of indoor heat exchanger in heating mode Auto defrosting and heating recovery under heating mode Anti cold air under heating mode Anti frozen under cooling mode 8 4 Protection 8 4 1 The compressor functions protection with a delay of three minutes 8 4 2 High temp protection of condenser 8 4 3 Sensor protection at open circuit and breaking disconnection 8 4 4 Temperature Fuse break protection 8 4 5 Fan Speed is out of control When Indoor Fan Speed is too high higher than High Fan 300RPM or too low lower than 400RPM the entire unit stops and LED displays failure information and can t returns to normal operation automatically 8 5 Fan only mode Fan speed is high mid low Auto 8 6 Cooling mode The 4 way valve is closed under cooling mode The action of the compressor and the outdoor fan Condition Compressor Outdoor fan Temp up TA Ts 1 On On TA lt Ts 1 off off Temp down TA gt Ts On On TA lt Ts Off Off TA Indoor ambient temperature 229 8 7 8 7 1 8 7 2 8 7 3 8 7 4 8 8 8 8 1 8 8 2 8 8 3 R se
6. DIN OLLI 19 BNO SNL ZL IL SHOLOANNOD Ball dx SHOLOINNOD BEX LEX HOSNAS aura MAL WooH MALSAS 97 YOSNAS IHN Ira WSL 3dld WALSAS 8917 Te Wels WMG bus BE li HE Ld TINSEL AME Hx Te IWILL LEIK OD HOSSAYdHOD HOOG Edd eID dd dv HOBO o amv Anite goloHW Mwd ev UNNA oou OL Ve UNM HOON OL OL m ie i gt P EEEE E ve ee e s la nana We 2 Ia sama PLE y 3002 HOE ADEME WE Id ON ls Java LENS AMOLOWA OM Ian 00 NOLIN 2I H2 JMS 46 simi Us Li AIMO d UNN o SILNO 2HOS ATAOE LT SEE ELEL ellie D SNO 4 ws p zl 257 tal 9 OND PND EN END e s arn UNA d gJr For 1 drive 3 outdoor unit 225 R series service manual 7 Troubleshooting 7 1 Indoor unit Display STATUS El EEPROM error E2 Zero crossing examination error E3 Fan speed beyond control E4 Over current protection of the compressor occurs 4 times ES Open or short circuit of Room temperature sensor E6 evaporator tem
7. Input Ww 37 51 5 Rated current A 0 17 0 24 Model RPG13H RPG20D Brand Welling Welling Indoor fan Input 33 38 motor Capacitor uF 1 2UF 450VAC 1 5UF 450V Cooling Speed turbo hi mi lo 1300 1200 1 100 850 1270 1220 1050 950 Heating Speed hi mi lo r min 1250 1100 880 1220 1050 950 a Number of rows 2 2 b Tube pitch a x row pitch b mm 21x13 37 21x13 37 c Fin spacing mm 1 3 1 3 Indoor coil d Fin type code Hydrophilic aluminium Hydrophilic aluminium e Tube outside dia and type mm 07 INNEGROOVE TUBE 97 INNEGROOVE TUBE f Coil length x height x width mm 538x252x26 74 637x294x26 74 g Number of circuits 2 2 Indoor air flow Hi Mi Lo m3 h 480 440 320 650 570 490 Indoor noise level Hi Mi Lo dB A 39 37 29 41 36 34 Dimension W H D mm 710x250x194 790x265x198 indoor unit Packing W H D mm 800x340x270 875x375x285 Net Gross weight Kg 7 5 10 9 12 Liquid side Gas side mm 06 35 0 9 53 6 35 12 7 217 3 2 Outdoor unit R series service manual Outdoor Model M20A 18HRN1 M20A 21HRN1 Power supply Ph V Hz 1Ph 220 240V 50Hz 1Ph 220 240V 50Hz Capacity Btu h 18000 21000 Capacity W 5275 6155 Cooling Input 1680 2000 Rated current A 8 0 9 7 EER w w 3 1 3 04 Capacity Btu h 20000 24000 Capacity W 5862 7034 Heating Input 1680 2050 Rated current A 8 0 9 8 EE
8. R series service manual GD Midea Refrigeration Equipment Co Ltd MULTI SPLIT TYPE HEAT PUMP AIR CONDITIONERS Technical service manual 2007 R410a X series multi units Indoor Models MSXI O9HRN1 MSXI 12HRN1 Outdoor Models M20A 18HRN1 M20A 21HRN1 M30A 27HRN1 M30A 30HRN1 214 Multi SERIES 2 Features Function Specification Dimensions Refrigeration cycle diagram Wiring diagram Troubleshooting Electronic function Characteristic of temp sensor 215 R series service manual R series service manual 1 Features 1 1 Universal outdoor unit and indoor unit design 1 2R410a refrigerant Cooling amp heating units 1 3 The indoor unit combination is as follow list OUTDOOR UNIT MODEL INDOOR UNIT COMBINATION M2OA 18HRN 1 9K x2 M2OA 21HRN 1 9K 12K M30A 27HRN1 9KX3 M30A 30HRN1 9K X 2 12K 1 4 Working Temperature Range Cooling Heating Models Indoor Low Indoor Hi Outdoor Lov Outdoor Hi Indoor H Outdoor Low Outdoor Hi multi 17 5 on off 2 Function Indoor unit Operation ON OFF by remote controller Sensing by room temperature Room temperature sensor Pipe temperature sensor Room temperature control Maintain the room temperature in accordance with the setting temperature Starting temperature control Indoor fan is delayed for 5 sec at the starting Indoor fan speed control Turbo
9. R w w 3 45 3 42 Max input power 2280 2520 9 8 12 0 Starting current A 21 7 21 7 Model PA108X1C 4FTDE PA108X1C 4FTDE PA108X1C 4FTDE PA145X2C 4FT Type ROTARY ROTARY Brand GD TOSHIBA GD TOSHIBA Capacity Btu h 8769 X 2 8769 12014 Compressor Input Ww 885X2 885 1200 Rated current RLA A 4 15X2 4 1545 6 Locked rotor Amp LRA A 40X2 40457 Thermal protector Internal Internal Capacitor uF 25uF 370VAC X 2 25 35uF 370VAC Refrigerant oil ml 350X2 350 480 Model YDK60 6 YDK60 6 Brand Welling Welling W 111 111 Capacitor uF 4uFx2 4uFx2 Speed r min 830 650 830 650 a Number of rows 2 2 b Tube pitch a x row pitch b mm 25 4x24 25 4x24 c Fin spacing mm 1 7 1 7 Outdoor coil d Fin type code Hydrophilic aluminium Hydrophilic aluminium e Tube outside dia and type mm 9 53 Innergroove tube 9 53 Innergroove tube f Coil length x height x width mm 810X610X44 810X610X44 g Number of circuits 2 2 2 2 Outdoor air flow m3 h 2200 2200 Outdoor noise level dB A 56 56 Buiter Dimension D mm 895X655X345 895X655X345 nit Packing W H D mm 1050X780X470 1050X780X470 Net Gross weight Kg 76 82 76 82 Refrigerant type R410A g 980X2 900 1100 Design pressure Hi Lo MPa 4 4 2 0 4 4 2 0 Liquid side Gas side mm inch 6 35 9 53 6 35 9 53 6 35 12 7 oe Max refrigerant pipe length m 15 15 Max difference in level m 10 10 Connection wiring No Plug type No Thermostat type Electronic control Operation temp C 17 30 Am
10. bient temp C 18 43 cooling 7 24 heating 218 R series service manual Outdoor Model M30A 27HRN1 M30A 30HRN1 Power supply Ph V Hz 1Ph 220 240V 50Hz 1Ph 220 240V 50Hz Capacity Btu h 27000 30000 Capacity W 7913 8792 Cooling Input WwW 2570 2880 Rated current A 13 1 13 7 EER w w 3 03 3 02 Capacity Btu h 30000 34000 Capacity W 8792 9965 Heating Input WwW 2700 3070 Rated current A 13 3 14 2 EER w w 3 22 3 22 Max input power WwW 3600 3600 Max current A 16 6 16 6 Starting current A 31 8 31 8 Model PA200X2CS 4KU1 PA200X2CS 4KU1 PA145X2C 4FT PA145X2C 4FT Type ROTARY ROTARY Brand GD TOSHIBA GD TOSHIBA Capacity Btu h 16791 12014 16791 12014 Compressor Input 1670 1200 1670 1200 Rated current RLA A 7 81 5 6 7 81 5 6 Locked rotor 57 57 57 57 Thermal protector Internal Internal Capacitor uF 45 35uF 370VAC 45 35uF 370VAC Refrigerant oil ml 750 480 750 480 Model YDK50 4G1 YDK50 4G1 Brand Welling Welling Soe tan ari W 200 200 Capacitor uF 4uFx2 4uFx2 Speed r min 1150 1150 a Number of rows 2 2 b Tube pitch a x row pitch b mm 25 4x24 25 4x24 c Fin spacing mm 1 7 1 7 Outdoor coil d Fin type code Hydrophilic aluminium Hydrophilic aluminium e Tube outside dia and type mm 09 53 Innergroove tube 9 53 Innergroove tube f Coil length x height x wi
11. ction Requirement The maximum length of timer is 24 hours and the minimum resolving power is 15 minutes Economic Running The economic running function is available under cooling heating or auto mode Cooling The set temperature rise 10 per hour Two hours later the set temperature will maintain as a constant and the air circulation is kept at low speed Heating The set temperature decrease 10 per hour Two hours later the set temperature will maintain as a constant and the air circulation is kept at low speed Cold air proof function takes precedence over all Auto The economic running function operates in accordance with the selected running mode by the auto mode 8 15 Mode conflict The indoor units can not work cooling mode and heating at same time Heating mode has a priority 8 16 1 Definition Cooling mode Heating Mode Fan Off Cooling mode No Yes No No Heating Mode Yes No Yes No Fan No Yes No No Off No No No No No No mode conflict Yes Mode conflict 233 R series service manual 9 Characteristic of temp sensor Temp Resistance KO Temp Resistance KO Temp Resistance KO 10 62 2756 17 14 6181 44 4 3874 9 58 7079 18 13 918 45 4 2126 8 56 3694 19 13 2631 46 4 0459 7 52 2438 20 12 6431 47 3 8867 6 49 3161 21 12 0561 48 3 7348 5 46 5725 22 11 5 49 3 5896 4 44 23 10 9731 50 3 451
12. dth mm 813X812X44 813X812X44 g Number of circuits 3 3 3 3 Outdoor air flow m3 h 3200 3200 Outdoor noise level dB A 58 58 Dimension W H D mm 860X830X330 860X830X330 Outdoor unit Packing W H D mm 1000X985X425 1000X985X425 Net Gross weight Kg 81 90 81 90 Refrigerant type R410A g 15504 1150 155041150 Design pressure Hi Lo MPa 4 4 2 0 4 4 2 0 rer f 6 35 9 53 Liquid Gas hel mm inch 6 35 9 53 6 35 12 7 piping Max refrigerant pipe length m 15 15 Max difference in level m 10 10 Connection wiring No Plug type No Thermostat type Electronic control Operation temp C 17 30 Ambient temp 18 43 cooling 7 24 heating 219 R series service manual 4 Dimension 4 1 Indoor unit dimension a Indoor unit 9 ension H D Mode 9K 710 250 194 12K 790 265 198 4 2 Outdoor unit dimension a Outdoor unit 18K 21K 220 R series service manual b Outdoor unit 27K 30K 221 R series service manual 5 Refrigeration cycle diagram 1 drives 3 system is made up of one 1 drive 1 system and one 1 drive 2 system CD
13. erature TE2 Anti cold wind from Breeze to Setting Fan Speed temperature TE3 Anti cold wind from Setting Fan Speed to Breeze temperature TE4 Anti cold wind from Breeze to Fan Off temperature 8 8 5 Auto wind under heating mode 8 8 6 Condition Indoor fan speed T Indoor Temp Setting Temp Room temp up lt 20 High T gt 20 Med Room temp down T gt 00 Med lt 00 High Indoor evaporator high temperature protection under heating mode Condition Compressor Outdoor fan Indoor exchanger temp up TE lt TE8 On On TE8 lt TE lt TE7 On Off TE gt TE7 Off Off Indoor exchanger temp down TE gt TE9 Off Off TE lt TE9 On On TE Indoor evaporator temperature TE7 Evaporator high temperature protection compressor off temperature TE8 Evaporator high temperature protection fan off temperature TE9 Evaporator high temperature protection restoring temperature 8 9 Defrosting operation Available for heating only 8 9 1 Defrosting condition 231 R series service manual When T3 lt 0 and compressor runs 40 minutes T3 Temp of condenser 8 9 2 Ending condition of defrost If one of following conditions is satisfied end the defrosting and turn into heating A The defrost time has reached to 10 minutes B T3 gt 20 0 8 10 3 Time sequence of the whole defrosting procedure is as follows Compressor 4 way Valve OFF Outdoor Fan OFF 8 10
14. mode high med low breeze Anti cold function Operation indication Lamps VLED Prevent the cold wind at Light up in the VLED for each operation mode the beginning of unit start Two direction air vane Defrost mode The unit will decide the louver direction according to operation mode Auto restart function Sleep mode auto control The fan is turn to low speed cooling heating gt i The unit will be turn off at the seventh hour Air flow Direction control Independent dehumidification __ Self diag function The function is usually used in rainy days in springtime or damp areas 216 R series service manual Outdoor unit _ Power relay control The unit has 3 mins delay between continuously ON OFF operations Check point Hydrophilic aluminum fin The hydrophilic fin can improve the heating efficiency at operation mode 4 way valve control Itis only operated in the heating operation mode except defrosting operation Discharge pipe temperature protect 3 Specification 3 1 Indoor unit Anti rust cabinet Model MSXI 09HRN1 MSXI 12HRN1 Power supply Ph V Hz 1Ph 220 240V 50Hz 1PH 220 240V 50Hz Capacity Btu h 9000 12000 Cooling Input Ww 36 5 51 5 Rated current A 0 17 0 24 Capacity Btu h 10000 13000 Heating
15. of cooling mode Heating mode Generally the 4 way valve is open in heating mode but it is closed in defrosting mode 4 way valve must delay 2 minutes compared with compressor if the compressor changed into non heating mode or turned off 4 way valve doesn t delay in dehumidifying mode Generally the outdoors fan is turned off with the on off action of compressor in heating mode except for the defrosting mode or the end of defrosts Action conditions of compressor under heating mode compressor must run for 7 minutes after starting and then judge temperature Meanwhile other protections are still valid 230 R series service manual Condition Compressor Outdoor fan Room temp up TA gt Ts 3 Off Off TA lt Ts 3 On On Room temp down TA lt Ts 2 On On TA gt Ts 2 Off Off TA Indoor ambient temperature TS Setting temperature through the remote controller 8 8 4 Indoor Fan actions under heating mode Indoor Fan can be set at HIGH MID LOW AUTO by using a remote controller but Anti cold wind function has the priority Anti cold wind control function under heating mode Condition Indoor fan speed TE Indoor exchanger temp up TE lt TE1 Off TE1 lt TE lt TE2 Breeze TE gt TE2 Setting fan speed Indoor exchanger temp down TE Setting fan speed TE3 lt TE lt TE4 Breeze TE lt TE4 Off TE Indoor evaporator temperature TE1 Anti cold wind from Fan Off to Breeze temp
16. perature sensor open or short circuit of 7 2 Outdoor unit on mainboard 7 2 1 1 drive 2 Failure phenomenon LED1 LED2 LED3 Stand by x x High temp protect of condenser x Temp sensor in condenser 1 is open circuit or short circuit Temp sensor in condenser 2 is open circuit or short circuit x Flash at 2Hz 7 2 2 1 drive 3 Failure phenomenon LED1 LED2 LEDS Sensor in outdoor unit High temp protect of condenser RT3B or RT3A RT3A sensor is open circuit or short circuit x RT3A RT4 sensor is open circuit or short circuit RT4 RT3B sensor is open circuit or short circuit RT3B x Flash at 2Hz 7 3 Diagnostic chart 7 3 1 EEPROM error Circuit or software error on indoor Replace indoor PCB 7 3 2 Cross zero signal error Is power supply and NO Be sure the power supply is good connection of connectors and correct the connection good YES Indoor PCB is defective Replace the indoor PCB 7 2 3 Indoor fan speed has been out of control for over 1 minute 226 R series service manual Is the indoor fan motor NO connector and connection good Repair the connector and reconnect YES Is voltage being applied to the fan motor rang 90v 160v between mid pin and N on CN1 Indoor PCB 15 defective Replace the indoor PCB Replace the indoor fan motor
17. ries service manual TS Setting temperature through the remote controller Auto fan under cooling mode Condition Indoor fan speed T Indoor Temp Setting Temp Temp up T lt 3 Low 3U T 5 Med T gt 5 High Temp down T gt 3 High 10 lt T lt 3 Med T 1 Low Anti freezing control to indoor evaporator under cooling mode Condition Compressor Outdoor fan Temp Time Temp up T TE6 On On T TE6 5 Minutes Off Off Temp down T TE5 On On T TE5 5 Minutes Off Off Condenser high temperature protection under heating mode gt 650 turn off compressor TE5 Evaporator low temperature protection entering temperature TE6 Evaporator low temperature protection restoring temperature Dehumidifying mode The 4 way valve is off in dehumidifying mode Compressor and Indoor Fan actions in dehumidifying mode Compressor run 5 minutes and indoor fan run 5 minutes in low speed then turn off the compressor indoor fan run 5 minutes in low speed And repeat on and off cycle Low room temperature protection When room temperature decreases to below 100 the compressor and the outdoor fan will stop indoor fan is Breeze Dehumidifying operation will be resumed when room temperature restores to over 130 Under dehumidifying mode the anti freezing function of the indoor heat exchanger is the same as that
18. uminates when the air conditioner is in operation This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air gt gt PRE DEF Indicator For Cooling amp Heating models only 0 10 control feature is activated in heating mode This indicator illuminates when the air conditioner is in Auto Mode Turbo indicator TUDO This indicator illuminates when the air conditioner is in turbo operation lt lt TEMPERATURE indicator Usually it displays the temperature settings e Auto Mode TIMER indicator This indicator illuminates when TIMER is set ON OFF FAN SPEED indicator S This indicator illuminates when change the fan speed e Ionizer Plasma function indicator This indicator illuminates when Ionizer Plasma function is on 228 R series service manual 8 2 Proper symbols and their meanings TA Indoor ambient temperature TE Indoor evaporator temperature TS Setting temperature through the remote controller TE1 Anti cold wind from Fan Off to Breeze temperature TE2 Anti cold wind from Breeze to Setting Fan Speed temperature TE3 Anti cold wind from Setting Fan Speed to Breeze temperature TE4 Anti cold wind from Breeze to Fan Off temperature TE5 Evaporator low temperature protection entering temperature TE6 Evaporator low temperature protection restoring temperature TE7 Evaporator high temperature protection compressor off temperature TE8 Evaporator
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