Midea MUE-48HRFN1-M Service Manual Download Page 90

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16. Troubleshooting

Safety

Electricity is stored in capacitors, even when the power supply is shut off. Do not forget to discharge the electricity in the

capacitors.

Electrolytic Capacitors

(HIGH VOLTAGE! CAUTION!)

For other models, For other models, connect a discharge resistor (approx.100

40W) or a soldering iron plug between

the + and - terminals of the electrolytic capacitor on the opposite side of the outdoor printed circuit board (PCB).

Note: The picture above is for reference purposes only. The design of the devices depicted may vary by model.

Summary of Contents for MUE-48HRFN1-M

Page 1: ...e 5 Refrigerant Cycle Diagram 6 Wiring Diagram 7 Static Pressure 8 Electric Characteristics 9 Sound Level 10 Accessories 11 The Specification of Power 12 Installation Details 13 Operation Characterist...

Page 2: ...cteristics 50 9 Sound Level 51 9 1 Indoor unit 51 9 2 Outdoor unit 54 10 Accessories 55 11 The Specification of Power 57 12 Installation Details 59 12 1 Location selection 59 12 2 Indoor unit installa...

Page 3: ...Unit Error Display 88 16 2 Outdoor unit error display 89 For 9K 24K outdoor unit 89 For 36K 48K Outdoor Unit 90 Outdoor check function 90 16 3 Diagnosis and Solution 93 16 4 Main parts check 109 17 D...

Page 4: ...t Sharp edges could cause injury be especially careful of the case edges and the fins on the condenser and evaporator For installation always contact the dealer or an authorized service center Do not...

Page 5: ...epair of product Low refrigerant levels may cause failure of product Install the drain hose to ensure that water is drained away properly A bad connection may cause water leakage Keep level even when...

Page 6: ...l injury Replace the all batteries in the remote control with new ones of the same type Do not mix old and new batteries or different types of batteries There is risk of fire or explosion Do not recha...

Page 7: ...MT0W Duct CTBU 12HWFN1 M C Console CFAU 12HRFN1 M C Cassette 18K CCA3U 18HRFN1 M C MOCA30 18HFN1 MT0W MOCA01 18HFN1 MT0W MOCA31 18HFN1 MT0W Duct CTBU 18HWFN1 M C Floor Ceiling MUEU 18HRFN1 M C Casset...

Page 8: ...5 2 2 Part names of Indoor Outdoor units Cassette Unit...

Page 9: ...6 Duct Units...

Page 10: ...7 Console...

Page 11: ...8 Ceiling floor Units...

Page 12: ...ptional The size of air inlet frame from rear and bottom is same it s very easy to move the cover from bottom to rear side or from rear to the bottom in order to matching the installation condition 2...

Page 13: ...tly remove two bolts and then replace the motor or centrifugal fan easily 2 3 1 5 Reserved Remote On off and Central Control Ports Reserved remote on off ports and central control ports can connect th...

Page 14: ...ceiver in the E box Move out the display and fix it in other place even in the distance of 2m The unit will realized remoter control The wired controller and the display board can display the error co...

Page 15: ...Fire proof Controller Box Electrical control box adopts new design which can meet higher fire safety requirements 2 3 2 4 Fresh Air Fresh air intake function bring you fresh and comfortable air feeli...

Page 16: ...750mm upmost It s convenient to install drainage piping under most space condition 2 3 2 7Terminals For Alarm Lamp and Long distance On off Controller Connection Are Standard Reserve terminals for th...

Page 17: ...ooling To maintain room temp Air outlet from top and bottom to make quick cooling When the A C is just switched on or room temp is still high cold air will be blown out from top and bottom air outlet...

Page 18: ...ing only the upper louver is opened in a high position the lower louver closed 2 3 3 4 Four Air Inlets 2 3 3 5 Low Noise DC indoor fan motor which has five speeds Low noise and energy saving Advanced...

Page 19: ...air 2 3 1 2 Brief Design Brief design that is suitable for any interior will not only give you cooling and heating performance but also upgrade your lifestyle 2 3 1 3 3D Airflow Vertical air flow and...

Page 20: ...D Panel 2 3 1 5 Convenience Operating and Easy Maintenance Remote controller as standard wired controller for optional The filter without screw fixed can be took out easily 2 3 1 6 Easy Installation S...

Page 21: ...63 3 74 5 91 12 mm 700 210 635 570 65 493 35 119 595 200 80 740 350 120 143 95 150 in 27 56 8 27 25 22 44 2 56 19 41 1 38 4 69 23 43 7 87 3 15 29 13 13 78 4 72 5 63 3 74 5 91 18 mm 920 210 635 570 65...

Page 22: ...s side Liquid side 4 install hanger Body Drain pipe 25 Fresh air intake 65 647 647 50 Drain hole for Service 545 570 260 68 42 157 126 44 Wiring connection port 75 E parts box 4 Screw hole for install...

Page 23: ...1 196 132 A A B A A B A A B A B Service hole for draining pump Fresh air intake 75 55 80 80 4 install hanger Gas side Liquid side E parts box 135 90 Panel Body 92 92 92 92 D D 92 92 D D D D 92 92 92 9...

Page 24: ...21 48K mm 160 95 287 60 inch 6 30 3 74 11 30 2 36 Console Units 16 Drain pipe 195 Hanging arm Unit mm 700 600 210...

Page 25: ...ection port 204 94 Fresh air intake Drain discharge port Refrigerant pipe hole Hanging arm D Capacity Btu h A B C D 18K 24K mm 1068 675 235 983 inch 42 05 26 57 9 25 38 70 36K mm 1285 675 235 1200 inc...

Page 26: ...3 11 8 21 9 33 1 19 2 11 7 MOB30 09HFN1 MX0W MOB30 12HFN1 MV0W MOB30 12HFN1 MT0W MOB01 09HFN1 MW0W MOB01 12HFN1 MV0W mm 800 333 554 870 514 340 inch 31 5 13 1 21 8 34 3 20 2 13 4 MOCA01 18HFN1 MT0W MO...

Page 27: ...24 MOD30 24HFN1 MT0W MOD31 24HFN1 MT0W MOD30U 36HFN1 M mm 946 410 810 1030 673 403 inch 37 2 16 1 31 9 40 6 26 5 15 9...

Page 28: ...25 Model W D H W1 A B MOE30U 48HFN1 M mm 952 415 1333 1045 634 404 inch 37 5 16 3 52 5 41 1 25 0 15 9...

Page 29: ...ough space required for installation and maintenance 200mm 7 87in or more 300mm 11 81in or more 600mmx600mm 23 62inx23 62in Check orifice All the indoor units reserve the hole to connect the fresh air...

Page 30: ...27 Console Unit Ceiling floor Units...

Page 31: ...28 4 2 Outdoor Unit More than 30cm 11 81in More than 60cm 23 62in More than 200cm 78 74in Air inlet Air inlet More than 30cm 11 81in Air outlet Wall or obstacle Maintain channel More than 60cm 23 62in...

Page 32: ...CONDENSER Compressor 2 WAY VALVE 3 WAY VALVE 4 WAY VALVE COOLING HEATING T2B Evaporator temp sensor outlet T1 Room temp sensor T3 Condenser temp sensor T5 Discharge temp sensor T4 Ambient temp sensor...

Page 33: ...30 6 Wiring Diagram 6 1 Indoor Unit CCA3U 09HRFN1 M C CCA3U 12HRFN1 M C CCA3U 18HRFN1 M C MCD 24HRFN1 M C CTBU 09HWFN1 M C CTBU 12HWFN1 M C CTBU 18HWFN1 M C CTBU 24HWFN1 M C...

Page 34: ...31 CFAU 09HRFN1 M C CFAU 12HRFN1 M C MCD 36HRFN1 M C MCD 48HRFN1 M D...

Page 35: ...32 CTBU 36HWFN1 M C CTBU 48HWFN1 M C...

Page 36: ...33 MUEU 18HRFN1 M C MUEU 24HRFN1 M C MUE 36HRFN1 M C...

Page 37: ...34 MUE 48HRFN1 M C MUE 36HRFN1 M C MUE 48HRFN1 M C...

Page 38: ...35 6 2 Outdoor Unit MOB30 09HFN1 MX0W MOB01 09HFN1 MW0W MOB30 12HFN1 MV0W MOB01 12HFN1 MV0W MOCA30 18HFN1 MT0W MOCA01 18HFN1 MT0W MOCA31 18HFN1 MT0W MOD31 24HFN1 MT0W...

Page 39: ...36 MOBA30 09HFN1 MT0W MOB30 12HFN1 MT0W...

Page 40: ...37 MOD30 24HFN1 MT0W MOD01 23HFN1 MT0W...

Page 41: ...38 MOD30U 36HFN1 M...

Page 42: ...C409 IC402 C403 IC11 E402 D401 C401 R403 C411 C40 C50 D403 R401 R405 R406 R404 E404 D402 D404 C408 C402 E403 R407 R408 C404 C110 E409 E401 R402 C405 10 9 7 6 5 4 3 1 T401 C406 C407 D13 D14 E406 E407...

Page 43: ...25 C24 C23 C22 C21 C20 C19 C17 C16 C15 C14 C13 C12 C11 C10 C9 C8 C7 C6 C5 C4 C3 C2 C1 JP1 JP2 D29 D30 CN23 SSR1 CN7 CN13 P 1 L1 R82 R83 R84 R85 R86 R87 R97 R119 R122 R132 CN35 N CN37 FAN L Q3 Q6 Q7 Q8...

Page 44: ...R516 R528 R601 R603 R605 R607 R608 R610 R611 R612 R615 R616 R617 R618 R619 R620 R626 RY2 ZR1 CN6 D401 D404 Rdi IC102 D602 R171 C611 D101 C101 E106 C1 C520 ZR3 CN30 CN29 CN28 C307 C308 C309 C310 C311...

Page 45: ...IC15 24C256 IC14 24C08 IC10 IC7 IC4 IC2 E34 E33 E27 E25 E24 E22 E21 E20 E17 E16 E15 E14 E13 E12 E10 E9 E8 E7 E6 E5 E4 E1 DZ9 DZ8 DZ7 DZ6 DZ1 D26 D14 D13 D12 D11 D10 D9 D8 D6 D5 D4 D3 D2 CN57 1 CN56 CN...

Page 46: ...1 2 3 4 Model 12 0 02 5 0 04 10 0 08 20 0 12 30 0 16 40 0 0 18 0 45 Model 18 0 04 10 0 10 25 0 14 35 0 18 45 0 22 55 0 0 28 0 70 18 Model 24 0 04 10 0 10 25 0 16 40 0 22 55 0 28 70 0 0 40 0 100 24 Mod...

Page 47: ...44 CTBU 09HWFN1 M C Code 0 Code 1 Code 2 Code 3 Code 4...

Page 48: ...45 CTBU 12HWFN1 M C Code 0 Code 1 Code 2 Code 3 Code 4...

Page 49: ...46 CTBU 18HWFN1 M C Code 0 Code 1 Code 2 Code 3 Code 4...

Page 50: ...47 CTBU 24HWFN1 M C Code 0 Code 1 Code 2 Code 3 Code 4...

Page 51: ...48 CTB 36HWFN1 M C Code 0 Code 1 Code 2 Code 3 Code 4...

Page 52: ...49 CTB 48HWFN1 M C Code 0 Code 1 Code 2 Code 3 Code 4...

Page 53: ...0 208 230V 187V 253V CCA3U 18HRFN1 M C 60 208 230V 187V 253V CTBU 18HWFN1 M C 60 208 230V 187V 253V MUEU 18HRFN1 M C 60 208 230V 187V 253V MCD 24HRFN1 M C 60 208 230V 187V 253V CTBU 24HWFN1 M C 60 208...

Page 54: ...Discharge Microphone 1 4m Concealed Duct Type Duct Duct Model Noise level dB A H M L CTBU 09HWFN1 M C 37 34 31 CTBU 12HWFN1 M C 39 36 32 CTBU 18HWFN1 M C 35 33 31 CTBU 24HWFN1 M C 50 47 45 CTBU 36HWFN...

Page 55: ...1 4m Microphone Model Noise level dB A H M L CCA3U 09HRFN1 M C 41 39 37 CCA3U 12HRFN1 M C 41 38 35 CCA3U 18HRFN1 M C 46 43 41 MCD 24HRFN1 M C 51 47 43 MCD 36HRFN1 M C 52 47 44 MCD 48HRFN1 M C 53 49 4...

Page 56: ...A H M L CFAU 09HRFN1 M C 45 41 35 CFAU 12HRFN1 M C 44 42 38 Microphone 1m 1m Air outlet side 1 5m 1m Microphone Model Noise level dB A H M L MUBU 18HRFN1 M C 47 44 38 MUEU 24HRFN1 M C 53 49 45 MUE 36H...

Page 57: ...MOB01 09HFN1 MW0W 59 MOB30 12HFN1 MV0W MOB01 12HFN1 MV0W 56 MOCA30 18HFN1 MT0W MOCA01 18HFN1 MT0W 59 MOD30 24HFN1 MT0W MOD01 23HFN1 MT0W 61 MOBA30 09HFN1 MT0W 56 MOB30 12HFN1 MT0W 57 MOCA31 18HFN1 MT0...

Page 58: ...Owner s manual 1 Installation manual 1 EMS It s fitting Magnetic ring twist the electric wires L and N around it to five circles 1 Cassette Units Name Shape Quantity Installation Fittings Installatio...

Page 59: ...ook 4 Installation hook 4 Orifice 1 Console Units Name Shape Quantity Installation fittings Hook 2 Remote controller Its Frame Remote controller 1 Frame 1 Mounting screw ST2 9 10 C H 2 Alkaline dry ba...

Page 60: ...nd Wiring 2 5 2 0 Outdoor Unit Power Wiring 3 2 5 3 2 0 Strong Electric Signal 4 1 0 4 1 5 Weak Electric Signal Model 36K 48K Power Phase 1 phase 1 phase Frequency and Voltage 208 230V 60Hz 208 230V 6...

Page 61: ...58 12 Field Wiring 36K 48K...

Page 62: ...s close to indoor unit as possible The piping length and height drop cannot exceed the allowable value The place where the noise vibration and outlet air do not disturb the neighbors There is enough r...

Page 63: ...the main body is within 1 12 2 1 5 Install the air filter Insert the air filter through the filter slot and fix it with 2 screws 12 2 1 6 Install the air duct Please design the air duct as below reco...

Page 64: ...e space for indoor unit 12 2 2 2 Bolt pitch 12 2 2 3 Install the pendant bolt Select the position of installation hooks according to the hook holes positions showed in upper picture Drill four holes o...

Page 65: ...levelness of the main body is within 1 Adjust the position to ensure the gaps between the body and the four sides of ceiling are even The body s lower part should sink into the ceiling for 10 12 mm In...

Page 66: ...12 2 3 1 Service space for indoor unit 12 2 3 2 Install the main body Fix the hook with tapping screw onto the wall Hang the indoor unit on the hook The bottom of body can touch with floor or suspende...

Page 67: ...tall the tapping screws onto the wall Refer to picture below 12 2 4 4 Install the main body Ceiling installation The only installation method for the unit with drain pump Remove the side board and the...

Page 68: ...ed the expansible hooks fittings 12 2 5 4 Install the main body Make the 4 suspender through the 4 hanger of the main body to suspend it Adjust the hexangular nuts on the four installation hooks evenl...

Page 69: ...ing to avoid condensate water Hang the air in grill to the panel then connect the lead terminator of the swing motor and that of the control box with corresponding terminators on the body respectively...

Page 70: ...e allowable pipe length and height drop to decide the installation position Make sure the distance and height drop between indoor and outdoor unit not exceeded the date in the following table Model Ma...

Page 71: ...e Diameter Torque Sketch map kgf cm N cm 1 4 6 35 144 176 1420 1720 3 8 9 52 333 407 3270 3990 1 2 12 7 504 616 4950 6030 5 8 15 9 630 770 6180 7540 3 4 19 990 1210 9270 11860 12 4 3 First Time Instal...

Page 72: ...e set Loosen the flare nut on the 2 way valve approximately 45 for 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 the 2 way...

Page 73: ...ge hose for 5 seconds and then close it quickly 4 Close the 2 way valve 5 Turn on the air conditioner in cooling mode Turn it off when the gauge indicates 0 1MPa 14 5Psi 6 Immediately close the 3 way...

Page 74: ...ttom up to ensure liquid charge 2 To 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 be careful of the liquid refrigerant 3...

Page 75: ...C25 20 39 27 For branch pipe PVC32 25 70 50 PVC40 31 125 88 Could be used for confluence pipe PVC50 40 247 175 PVC63 51 473 334 Attention Adopt PVC40 or bigger pipe to be the main pipe For Vertical dr...

Page 76: ...r the lifting pipe immediately to avoid wrong operation of water level switch Refer the following picture for installation reference Flexible pipe 300mm Hanger A A Length of horizontal pipe 150mm B Li...

Page 77: ...pipes have not been distributed properly over back flow water shall cause the flashing of alarm indicator at remote controlled receiving board and even water shall run over the water collector b Cont...

Page 78: ...755mmHg stop vacuum drying and keep the pressure for 1 hour If the indicator of vacuum gauge does not go up it is qualified If going up it indicates that there is moisture or leak source 2 Special va...

Page 79: ...sulation of refrigerant pipe 1 Operational procedure of refrigerant pipe insulation Cut the suitable pipe insulation except joint section flare the pipe piping layout and connection vacuum drying insu...

Page 80: ...installation All field wiring construction should be finished by qualified electrician Air conditioning equipment should be grounded according to the local electrical regulations Current leakage prote...

Page 81: ...ns on the remote controller works well Whether the air flow louver moves normally Whether the room temperature is adjusted well Whether the indicator lights normally Whether the temporary buttons work...

Page 82: ...e Hyper heat 30 50 22 122 30 50 22 122 CAUTION 1 If the air conditioner is used beyond the above conditions certain safety protection features may come into operation and cause the unit to operate abn...

Page 83: ...otection of compressor top The unit will stop working when the compressor top temp protector cut off and will restart after the compressor top temp protector restart 14 3 3 Temperature protection of c...

Page 84: ...ating function will stop 14 3 9 Condenser high temperature T3 protection 55 C 131 F T3 60 C 140 F the compressor frequency will decrease to the lower level until to F1 and then runs at F1 If T3 54 C 1...

Page 85: ...H H H G M M M Z L L L D T1 Td 1 5 34 7 F L H M 1 5 29 3 F 3 0 26 6 F 4 5 23 9 F 1 5 29 3 F 3 0 26 6 F 4 5 23 9 F 1 5 29 3 F 3 0 26 6 F 4 5 23 9 F Auto fan action in heating mode 0 0 C 32 F T1 Td 1 5...

Page 86: ...r function 14 4 6 1 Timing range is 24 hours 14 4 6 2 Timer on The machine will turn on automatically when reaching the setting time 14 4 6 3 Timer off The machine will turn off automatically when rea...

Page 87: ...d the setting temperature 3 The PCB will take action to the mode change information from remote controller signal but it will not affected by the setting temperature 4 When the unit is running with fo...

Page 88: ...information Displaying code Meaning T1 T1 T1 temp T2 T2 T2 temp T3 T3 T3 temp T4 T4 T4 temp T2B Tb T2B temp TP TP TP temp TH TH TH temp Targeted Frequency FT Targeted Frequency Actual Frequency Fr Act...

Page 89: ...1 139 E0 E1 E9 140 141 149 F0 F1 F9 150 151 159 Indoor fan speed Outdoor fan speed 0 OFF 1 2 3 4 Low speed Medium speed High speed Turbo For some big capacity motors 14 FF Actual fan speed Display val...

Page 90: ...trolytic Capacitors HIGH VOLTAGE CAUTION For other models For other models connect a discharge resistor approx 100 40W or a soldering iron plug between the and terminals of the electrolytic capacitor...

Page 91: ...rge temperature sensor T5 malfunction 5 times O F4 Outdoor unit EEPROM parameter error 6 times O F5 Outdoor fan speed malfunction 7 times O F6 Indoor coil outlet pipe sensor Located on outdoor unit lo...

Page 92: ...eration normally X O 3 Compressor drive board EEPROM error O E5 4 IPM malfunction or IGBT over strong current protection X P0 5 Over voltage or too low voltage protection O O P1 6 Inverter compressor...

Page 93: ...board and IPM board J4 18 High pressure protection J5 19 Low pressure protection J6 20 Outdoor IPM module temperature sensor malfunction P7 21 AC voltage protection J8 Outdoor check function N Display...

Page 94: ...symbol Bit7 Frequency limit caused by IGBT radiator The display value is hex number For example the digital display tube show 2A then Bit5 1 Bit3 1 Bit1 1 It means frequency limit caused by T4 T3 and...

Page 95: ...3 Indoor unit capacity demand code 25 Room temp T1 of 1 indoor unit If the temp is lower than 0 degree the digital display tube will show 0 If the temp is higher than 70 degree the digital display tu...

Page 96: ...allation mistake Faulty PCB Trouble shooting Yes Replace the indoor outdoor main PCB Power off then restart the unit 2 minutes later Does a problem still remain EEPROM a type of read only memory The c...

Page 97: ...es Power off then restart the unit 2 minutes later Power off then restart the unit 2 minutes later No Replace the outdoor main PCB Power on Is the error extinguished Replace the outdoor main PCB Power...

Page 98: ...50V If the outdoor unit has malfunction the voltage will move alternately with positive value While if the indoor unit has malfunction the voltage will be a certain value Remark The old label is L1 L2...

Page 99: ...ce or add magnet ring on power wire Remove interference or add magnet ring on power wire Yes Replace the signal wire Replace the signal wire Yes Pull out and insert back Pull out and insert back No No...

Page 100: ...motor Faulty PCB Trouble shooting Power off then restart the unit after 2 minutes Does a problem remain Shut off the power supply Rotate the fan by hand Does it turn easily The unit is operating norm...

Page 101: ...well as between pin4 and pin3 in fan motor connector If the value of the voltage is not within the range shown in the following table the PCB may be experiencing problems and need to be replaced DC mo...

Page 102: ...n 0 06V or higher than 4 94V the LED displays a failure Potential causes Wiring mistake Faulty sensor Faulty PCB Trouble shooting Check the connection between temperature sensor and PCB Is it properly...

Page 103: ...nds and compressor running frequency is not higher than 50Hz for 3 minutes Potential Causes Faulty T2 sensor Faulty indoor PCB System problems such as leakage or blockages Trouble shooting Is there co...

Page 104: ...t the water level switch well Insert the water level switch well If the water level switch is broken If the water level switch is broken Yes Replace the water level switch Replace the water level swit...

Page 105: ...y outdoor PCB Trouble shooting Check the wiring between main PCB and compressor Does an error exist Ensure a proper connection or replace the wires and connectors Yes No Check the IPM Is it in working...

Page 106: ...103 P U P V...

Page 107: ...104 P W P N...

Page 108: ...k the connections and w i r e s Are they in working order Turn off the unit No Yes No Ensure proper connections or replace the wires Yes Replace the reactor Yes No Replace the IPM board Turn power on...

Page 109: ...utdoor units Does a problem exist Clear up the air inlet and outlet or the heat exchanger of the indoor and outdoor units Yes No Yes Yes Power off and then restart the unit 10 minutes afterwards Check...

Page 110: ...onic control box is Installed good Check whether electronic control box is Installed good Check whether thermal grease is no coating or uneven coating Check whether thermal grease is no coating or une...

Page 111: ...fan assembly Compressor malfunction Faulty outdoor PCB Trouble shooting Check the wiring between the main PCB and compressor Is it improperly wired Ensure proper connection or replace the wires and c...

Page 112: ...it properly wired Ensure proper connection No Yes Replace outdoor main PCB Measure the resistance value of the sensor Is it within acceptable parameters Replace the sensor No Yes 16 4 Main parts chec...

Page 113: ...243 0 38991 2 28 39 8239 38 100 5 62961 78 172 1 25423 118 244 0 37956 1 30 37 1988 39 102 5 39689 79 174 1 2133 119 246 0 36954 0 32 35 2024 40 104 5 17519 80 176 1 17393 120 248 0 35982 1 34 33 326...

Page 114: ...25 222 8 36 97 34 32 76 169 7 82 116 241 2 357 3 27 211 4 37 99 32 94 77 171 7 566 117 243 2 294 2 28 200 7 38 100 31 62 78 172 7 321 118 244 2 233 1 30 190 5 39 102 30 36 79 174 7 086 119 246 2 174...

Page 115: ...112 Appendix 3 10 11 12 13 14 15 16 17 18 19 20 21 22 48 50 52 54 56 58 60 62 64 66 68 70 72 23 24 25 26 27 28 29 30 31 32 33 34 35 74 76 78 80 82 84 86 88 90 92 94 96 98...

Page 116: ...he resistance value of each winding by using the tester Position Resistance Value ASN98D22UFZ ASM135D23UFZ ATF235D22UMT ATF250D22UMT ATF310D43UMT ATQ420D1UMU ATM115D43UFZ2 Blue Red 1 57 1 75 0 75 0 75...

Page 117: ...eral M P N U N U V V W W Red 4 Pressure on Service Port Cooling chart COOLING MODE Indoor Temp Outdoor temp 75 23 89 85 29 44 95 35 105 40 56 115 46 11 BAR 70 8 2 7 8 8 1 8 6 10 1 BAR 75 8 6 8 3 8 7 9...

Page 118: ...0 26 6 25 4 23 3 BAR 75 33 8 31 5 27 8 26 3 24 9 PSI 55 439 413 367 330 302 PSI 65 471 435 386 368 339 PSI 75 489 457 403 381 362 MPA 55 3 03 2 85 2 53 2 28 2 08 MPA 65 3 25 3 00 2 66 2 54 2 33 MPA 75...

Page 119: ...sconnect the fan motor wire fan capacity wire room temperature sensor wire and evaporator temperature sensor wire 3 Screw off the screws to remove electronic control box 2 Remove the display board 1 R...

Page 120: ...s connected to the PCB and remove the ground wire after remove the screw 2 Remove the PCB from the electronic control box 4 Remove the fan capacitor 1 Remove the cover of electronic control box Repeat...

Page 121: ...mble the fan motor fixing clamps to remove the fan motor assembly and fan wheel assembly 8 Disassemble the fan wheels then you can remove the fan motor Press the clips to take off the volute shell Pre...

Page 122: ...of No 5 2 Screw off the screws to remove the water collector assembly 7 Remove the evaporator 1 Remove the water collector Repeat the operation of No 6 2 Remove the evaporator sensor 3 Remove the pip...

Page 123: ...120 4 Remove the evaporator support board 5 Screw off the fixing screws to remove the evaporator 4 screws 1 screw...

Page 124: ...crew off two screws Disconnect the display board wire and swing motor wire connected to the PCB Remove the grille 5 Loose the four screws and two wireropes then the panel can be disassembled 3 Remove...

Page 125: ...step1 2 3 of No 2 2 Screw off 3 screws to remove the swing motor assy 3 Screw off 1 screws to remove the swing motor 5 Remove the PCB 1 Open the grille Repeat the operation of step1 of No 1 No need t...

Page 126: ...2 Remove the electronic control box cover Repeat the operation of step 2 of No 5 3 Pull out all the plugs or connectors connected to the electronic control box 4 Remove the electronic control box Rem...

Page 127: ...fan motor 1 Repeat the operation of No 6 2 Remove the fixing board of fan motor wire 3 Remove the 5 screws to disassemble the fan motor 9 Remove the water collecting 6 Remove the panel Repeat the oper...

Page 128: ...r collecting assembly 10 Remove the draining pump 1 Remove the panel Repeat the operation of No 2 2 Remove the electronic control box Repeat the operation of No 6 3 Remove the water collecting assembl...

Page 129: ...ut of the supporter 11 Remove the evaporator 1 Remove the water collecting assembly Repeat the operation of No 9 2 Remove the seal board of evaporator 3 Remove the evaporator fixing board 4 Remove the...

Page 130: ...filter 2 Remove the electronic control box 1 Remove the air front panel Open the front panel Repeat the operation of step1 of No 1 Remove the string Allowing the front panel to fall forward will enabl...

Page 131: ...wires evaporator coil temperature sensor T2 wire and two grounding wire yellow green to remove the electronic control box 3 Remove the PCB 1 Take out the electronic control box from the body and remov...

Page 132: ...step1 step of No2 2 Remove the fixing glue to remove the display board 5 Remove the switch board 1 Remove the electronic control box Repeat the operation of step1 step of No2 2 Remove the fixing glue...

Page 133: ...2 Screw off the screws to remove the motor 9 Remove the louver motor of the water collector 1 Remove the front panel assembly and the panel frame assembly Repeat the operation of step1 step2 and step3...

Page 134: ...ator assembly 1 Remove the electronic control box Repeat the operation of No 2 to remove the electronic control box 2 Remove the air outlet grille assembly Repeat the operation of No 7 to remove the a...

Page 135: ...sembly Repeat the operation of No 7 to remove the air outlet grille assembly 3 Remove four fixing screws to remove the ventilation assembly 4 Remove the hex nut fixing the fan to remove the fan 13 Rem...

Page 136: ...nditioner and turn OFF the power breaker 2 Remove the big handle first then remove the top cover 3 screws 3 Remove the screws of front panel 6 screws 4 Remove the screws of the right side panel 6 scre...

Page 137: ...l plate following procedure 1 2 Remove the nut fixing the fan and remove the fan 3 Unfix the hooks and then open the electronic control box cover Fan ass y 2 3 Compressor and liquid gas separator Elec...

Page 138: ...135 4 Disconnect the connector for fan motor from the electronic control board 5 Remove the four fixing screws of the fan motor then remove the motor 4 5...

Page 139: ...he two connectors for the compressor and the reactors 3 Pull out the two blue wires connected with the four way valve 3 Pull out connectors of the compressor top temp sensor condenser coil temp sensor...

Page 140: ...tor 5 Disconnect the electronic expansion valve wire from the control board 6 Remove the ground wires 7 Remove the power supply wires old label L1 L2 S new label 1 2 3 8 Then remove the electronic con...

Page 141: ...arts of four way valve and pipe 5 Then the four way valve ass y can be removed The picture of four way valve may be different from the one on your side 5 Compressor How to remove the compressor 1 Afte...

Page 142: ...eration of the air conditioner and turn OFF the power breaker 2 Remove the top panel 7 screws 3 Remove the screws of front panel 9 screws 4 Remove the screws of the right side panel 10 screws 2 4 3 2...

Page 143: ...nut fixing the fan and then remove the fan 2 Unfix the hooks and then open the electronic control box cover 3 Disconnect the 1 2 T3 T4 T5 sensor wire Motor wire Electronic expansion valve Compressor w...

Page 144: ...the four fixing screws of the fan motor 5 Then remove the fan motor 3 Electrical parts How to remove the electrical parts 1 After finish work of item 1 and item 2 remove the connectors for the compres...

Page 145: ...tors of the compressor top temp sensor condenser coil temp sensor T3 outdoor ambient temp sensor T4 and discharge temp sensor T5 4 disconnect the electronic expansion valve wire 5 remove the compresso...

Page 146: ...143 6 Remove the grounding screw 7 Remove the power supply wires old label L1 L2 S new label 1 2 3 8 Then remove the electronic control box 7...

Page 147: ...ts of four way valve and pipe 5 Then the four way valve ass y can be removed The picture of four way valve may be different from the one on your side 3 5 Compressor How to remove the compressor 1 Afte...

Page 148: ...urn OFF the power breaker 2 Remove the big handle first then remove the top panel 7screws 3 Remove the screws of the front panel 11 screws 4 Remove the screws of the right side plate and remove the ri...

Page 149: ...the fan 2 Unfix the hooks and screws then open the electronic control box cover 3 Disconnect the connector for fan motor from the electronic control board 1 2 Electric pipe heater and Crankcase electr...

Page 150: ...1 After finish work of item 1 and item 2 remove the three connectors for the compressor and the compressor crankcase heater and the electric heater 2 Pull out the two blue wires connected with the fo...

Page 151: ...sor T5 4 Disconnect the electronic expansion valve wire from the control board 5 Remove the grounding screw 6 Remove the power supply wires old label L1 L2 S old label 1 2 3 7 Then remove the electron...

Page 152: ...s of four way valve and pipe 5 Then the four way valve ass y can be removed The picture of four way valve may be different from the one on your side 3 4 5 Compressor How to remove the compressor 1 Aft...

Page 153: ...ower breaker 2 Remove the big handle first then remove the top cover 3 screws 3 Remove the screws of front panel 7 screws 4 Remove the screws of the right side panel 11 screws 2 4 3 3 2 Fan ass y How...

Page 154: ...fan and remove the fan 3 After remove the top cover Unfix the hooks and then open the electronic control box cover 4 Disconnect the connector for fan motor from the electronic control board 2 3 compre...

Page 155: ...152 5 Remove the four fixing screws of the fan motor then remove the motor 5...

Page 156: ...work of item 1 and item 2 remove the connector for the compressor 5 Pull out the two blue wires connected with the four way valve 3 Pull out connectors of the condenser coil temp sensor T3 outdoor am...

Page 157: ...154 electronic expansion valve wire from the control board 5 Remove the ground wires 6 Remove the wires 1 2 3 7 Then remove the electronic control box 5 6...

Page 158: ...pipe 5 Then the four way valve ass y can be removed The picture of four way valve may be different from the one on your side 5 Compressor How to remove the compressor 6 After perform work of item1 3...

Page 159: ...onditioner and turn OFF the power breaker 1 Remove the big handle first and then remove the top panel 3 screws 3 Remove the screws of front panel 6 screws 4 Remove the screws of the right side panel 8...

Page 160: ...nel plate following procedure 1 remove the hex nut fixing the fan and then remove the fan 2 Unfix the hooks and then open the electronic control box cover 1 2 compressor T3 T4 T5 sensor Motor Electron...

Page 161: ...Remove the four fixing screws of the fan motor Then remove the fan motor 3 Electrical parts How to remove the electrical parts 1 After finish work of item 1 and item 2 remove the connectors for the co...

Page 162: ...denser coil temp sensor T3 outdoor ambient temp sensor T4 and discharge temp sensor T5 4 disconnect the electronic expansion valve wire 5 Remove the grounding screw 6 Remove the Wires 1 2 3 Then remov...

Page 163: ...ipe 10 Then the four way valve ass y can be removed The picture of four way valve may be different from the one on your side 3 4 5 Compressor How to remove the compressor 1 After perform work of item1...

Page 164: ...ate 1 Stop operation of the air conditioner and turn OFF the power breaker 2 Remove the top panel 3 screws 3 Remove the screws of front panel 9 screws 4 Remove the screws of the right side panel 8 scr...

Page 165: ...then remove the fan 2 After remove the top cover Unfix the hooks and then open the electronic control box cover 3 Disconnect the connector for fan motor 1 2 T3 T4 T5 sensor wire Motor wire Electronic...

Page 166: ...xing screws of the fan motor Then remove the fan motor 3 Electrical parts How to remove the electrical parts 1 After finish work of item 1 and item 2 remove the connectors for the compressor and react...

Page 167: ...valve 3 Pull out connectors of the condenser coil temp sensor T3 outdoor ambient temp sensor T4 and discharge temp sensor T5 4 disconnect the electronic expansion valve wire 6 remove the electric hea...

Page 168: ...165 6 Remove the grounding screw 7 Remove the Wires 1 2 3 or L1 L2 S Then remove the electronic control box 5 7...

Page 169: ...pipe 11 Then the four way valve ass y can be removed The picture of four way valve may be different from the one on your side 3 5 Compressor How to remove the compressor 1 After perform work of item1...

Page 170: ...on of the air conditioner and turn OFF the power breaker 2 Remove the big handle first then remove the top cover 7 screws 3 Remove the screws of front panel 11 screws 4 Remove the screws of the right...

Page 171: ...emove the panel plate following procedure 1 2 Remove the nut fixing the fan and remove the fan 3 Unfix the hooks and remove the screws then open the electronic control box cover 2 3 fan Electronic con...

Page 172: ...nector for fan motor from the electronic control board 5 Remove the four fixing screws of the fan motor then remove the motor 5 4 T3 T4 T5 sensor Pressure switch Compressor wire Electronic expansion 4...

Page 173: ...1 and item 2 remove the connector for the compressor 2 Pull out the two blue wires connected with the four way valve 3 Pull out connectors of the condenser coil temp sensor T3 outdoor ambient temp se...

Page 174: ...171 5 Disconnect the electronic expansion valve wire from the control board 6 Remove the ground wires 7 Remove the wires 1 2 3 or L1 L2 S Then remove the electronic control box 6 7 5 4...

Page 175: ...pipe 5 Then the four way valve ass y can be removed The picture of four way valve may be different from the one on your side 5 Compressor How to remove the compressor 1 After perform work of item1 3...

Page 176: ...conditioner and turn OFF the power breaker 2 Remove the screws of air outlet grille 8 screws 3 Remove the hex nut fixing the fan 4 Remove the fan 5 Remove the screws of top cover and remove the top c...

Page 177: ...n motor after unfastening fixing screws 2 Panel plate How to remove the panel plate 1 Remove big handle 2 screws and water collector 2 screws 2 Remove two screws of terminal board and seven screws of...

Page 178: ...rm work of item 1 step 5 6 and item 2 2 Disconnect the fan motor connector 5p white from the IPM board 3 Disconnect following 8 pieces of connection wires and connectors between IPM and other parts IP...

Page 179: ...erature sensor 2p white CN12 Heatsink temperature sensor 2p red CN9 T3 T4 temperature sensor 2p 2p white CN15 Electronic expansive valve 6p red CN10 High and low pressure switch 2p 2p white Wires CN17...

Page 180: ...Extract refrigerant gas 3 Remove the sound insulation material and crankcase heating cable 4 Remove terminal cover of compressor and disconnect wires of crankcase electric heater and compressor from t...

Page 181: ...s from item 3 4 Remove fixing screw of the coil and remove the coil 5 Detach the welded parts of 4 way valve and pipe 6 The expansion valve How to remove the expansion valve 1 Perform work of item 1 2...

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Midea MUE-48HRFN1-M, Service Manual

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