Midea CTBU-09HWFN1-M Service Manual
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Midea CTBU-09HWFN1-M Service Manual

Light commercial mono 3d air conditioner
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Revision C: 1607, Content updated.

Table of Contents

1.
2.
Part Names And Functions
3.
4.
5.
6.
7.
8.
9.
15. Solar Panel
WARNING
Installation MUST conform with local building codes or, in the absence of local codes, with the
National Electrical Code NFPA70/ANSI C1-1993 or current edition and Canadian Electrical
Code Part1 CSA C.22.1.
The information contained in the manual is intended for use by a qualified service technician
familiar with safety procedures and equipped with the proper tools and test instruments
Installation or repairs made by unqualified persons can result in hazards to you and others.
Failure to carefully read and follow all instructions in this manual can result in equipment
malfunction, property damage, personal injury and/or death.
This service is only for service engineer to use.
Light commercial MONO 3D Air
Conditioner
SERVICE MANUAL
Model Numbers:
Indoor Unit:
CTBU-09HWFN1-M(C); CCA3U-09HRFN1-M(C); CFAU-09HRFN1-M(C)
CTBU-12HWFN1-M(C); CCA3U-12HRFN1-M(C); CFAU-12HRFN1-M(C)
CTBU-18HWFN1-M(C); CCA3U-18HRFN1-M(C); MUEU-18HRFN1-M(C)
CTBU-24HWFN1-M(C); MCD-24HRFN1-M(C); MUEU-24HRFN1-M(C);
CTB-36HWFN1-M(C); MCD-36HRFN1-M(C); MUE-36HRFN1-M(C);
CTB-48HWFN1-M(C); MCD-48HRFN1-M(D); MUE-48HRFN1-M(C);
Outdoor Unit:
MOB30-09HFN1-MX0W; MOB01-09HFN1-MW0W; MOB30-12HFN1-MV0W;
MOB01-12HFN1-MV0W; MOCA30-18HFN1-MT0W; MOCA01-18HFN1-MT0W;
MOD30-24HFN1-MT0W; MOD01-23HFN1-MT0W; MOBA30-09HFN1-MT0W;
MOB30-12HFN1-MT0W; MOCA31-18HFN1-MT0W; MOD31-24HFN1-MT0W;
MOD30U-36HFN1-M; MOE30U-48HFN1-M;
Mono DC

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Summary of Contents for Midea CTBU-09HWFN1-M

  • Page 1: Table Of Contents

    Conditioner Mono DC SERVICE MANUAL Revision C: 1607, Content updated. Model Numbers: Table of Contents Indoor Unit: Precaution CTBU-09HWFN1-M(C); CCA3U-09HRFN1-M(C); CFAU-09HRFN1-M(C) Part Names And Functions CTBU-12HWFN1-M(C); CCA3U-12HRFN1-M(C); CFAU-12HRFN1-M(C) Dimension CTBU-18HWFN1-M(C); CCA3U-18HRFN1-M(C); MUEU-18HRFN1-M(C) Service space CTBU-24HWFN1-M(C); MCD-24HRFN1-M(C); MUEU-24HRFN1-M(C); Refrigerant Cycle Diagram CTB-36HWFN1-M(C);...
  • Page 2 CONTENTS 1. Precaution ..............................1 1.1 Safety Precaution .......................... 1 1.2 Warning ............................1 2. Part Names and Features..........................4 2.1 Model Names of Indoor/Outdoor units ..................4 2.2 Part names of Indoor/Outdoor units ....................5 2.3 Features ............................9 3.
  • Page 3 14.4 Operation Modes and Functions ....................81 16. Troubleshooting ............................87 16.1 Indoor 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 ......................

  • Page 4: Precaution

     Be caution when unpacking and installing the product. 1. Precaution Sharp edges could cause injury, be especially careful of the case edges and the fins on the 1.1 Safety Precaution condenser and evaporator.  For installation, always contact the ...
  • Page 5   If strange sounds or smoke comes Install the drain hose to ensure that from product, turn the breaker off or water is drained away properly. disconnect the power supply cable. A bad connection may cause water leakage.  There is risk of electric shock or fire.
  • Page 6  Do not insert hands or other objects through air inlet or outlet while the product is operated.  Do not drink the water drained from the product.  Use a firm stool or ladder when cleaning or maintaining the product. Be careful and avoid personal injury.

  • Page 7: Part Names And Features

    2. Part Names and Features 2.1 Model Names of Indoor/Outdoor units Outdoor units Series Capacity Indoor units Cassette CCA3U-09HRFN1-M(C) MOB30-09HFN1-MX0W; Duct CTBU-09HWFN1-M(C) MOB01-09HFN1-MW0W; MOBA30-09HFN1-MT0W Console CFAU-09HRFN1-M(C) Cassette CCA3U-12HRFN1-M(C) MOB30-12HFN1-MV0W; Duct CTBU-12HWFN1-M(C) MOB01-12HFN1-MV0W; MOB30-12HFN1-MT0W; Console CFAU-12HRFN1-M(C) Cassette CCA3U-18HRFN1-M(C) MOCA30-18HFN1-MT0W; Duct CTBU-18HWFN1-M(C) MOCA01-18HFN1-MT0W;...

  • Page 8: Part Names Of Indoor/Outdoor Units

    2.2 Part names of Indoor/Outdoor units Cassette Unit...
  • Page 9 Duct Units...
  • Page 10 Console...
  • Page 11 Ceiling-floor Units...

  • Page 12: Features

    2.3 Features 2.3.1 Duct Units 2.3.1.1 Installation Accessories: (Optional)  Front Board, Canvas Air Passage, Filter, Panel, for easy installation Panel 2.3.1.2 Easy Installation: Two air Inlet Styles (Bottom side or Rear side)  Air inlet from rear is standard for all capacity; air inlet from bottom is optional. The size of air inlet frame from rear and bottom is same, it’s very easy to move the cover from ...
  • Page 13 2.3.1.4 Easy Maintenance  Clean the filter (Optional, standard product without filter) It is easy to draw out the filter from the indoor unit for cleaning, even the filter is installed in rear side or bottom side.  Replace the motor or centrifugal fan Remove the ventilated panel firstly.
  • Page 14 2.3.1.7 Built-in Display Board  The standard indoor unit can be controlled by wired controller.  There is a display board with a receiver 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. ...
  • Page 15 2.3.2 Cassette Unit 2.3.2.1 Lower Noise  Optimize air channel system design to ensure the maximum quietness and comfort.  Noise max down 6dB. 2.3.2.2 Turbo Mode (Optional)  Turbo function can boost cooling or heating speed in a short period, and makes the room cool down or heat up rapidly.
  • Page 16 2.3.2.6 Build-in Drain Pump  The drain pump can lift the condensing water up to 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 the connection of alarm lamp and long-distance on-off controller, more human control.
  • Page 17 2.3.3 Console 2.3.3.1. Modern and Elegant Appearance  The simple and stylish designs can nicely harmonies with your living space. 3.2.3.2. Four Panels Pptional 2.3.3.3. Two Air-outlet Ways Cooling mode Quick Cooling 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.
  • Page 18 Heating mode  Anti-cold air ------When the AC is just turn on, temperature of evaporator is very low, in this case, in order to prevent cold air direct blowing, only the upper louver is opened in a high position, the lower louver closed.
  • Page 19 2.3.1 Ceiling-floor Units 2.3.1.1 Two-way Installation  The rounded design of the ceiling and floor type air conditioner allows either ceiling or floor-level installation. Ceiling installation saves room space, while floor installation helps prevent the loss of warm air. 2.3.1.2 Brief Design ...
  • Page 20 2.3.1.4 Optional Drainage Pipe Connection  Both right side and left side drainage holes are available to avoid the space limitation for drainage pipe installation. Make you more convenient during installation. C Panel (LED display) D Panel 2.3.1.5 Convenience Operating and Easy Maintenance ...

  • Page 21: Dimension

    3. Dimension 3.1 Indoor Unit Duct Units air inlet from rear side Air filter ( optional ) 4-install hanger Liquid side 25 Drain pipe Gas side 25 Drain pipe Test mouth & Test cover 25 Drain connecting pipe ( for pump ) Fresh air intake Electric control box Air filter ( optional )
  • Page 22 Cassette Units(9K, 12K, 18K) Liquid side Gas side Body Drain hole Wiring connection port ( for Service ) E-parts box 4-Screw hole (for install panel) 4-install hanger Drain pipe Fresh air intake Wiring connection port Panel...
  • Page 23 Cassette Units (24K, 36K, 48K) 92 92 Fresh air intake 4-install hanger Body Gas side Liquid side Wiring connection port E-parts box Service hole for Test mouth & Test cover draining pump Drain hole 92 92 92 92 Panel Capacity (Btu/h) inch 6.30 2.95...
  • Page 24 inch 6.30 3.74 11.30 2.36 Console Units Hanging arm 16 Drain pipe Unit: mm...
  • Page 25 Ceiling-floor Units (18K-48K) Wiring connection port Drain discharge port Fresh air intake Refrigerant pipe hole Hanging arm Capacity (Btu/h) 1068 18K / 24K inch 42.05 26.57 9.25 38.70 1285 1200 inch 50.59 26.57 9.25 47.24 1650 1565 inch 64.96 26.57 9.25 61.61...

  • Page 26: Outdoor Unit

    3.2 Outdoor Unit Note: The above drawing is only for reference. The appearance of your units may be different. Model MOBA30-09HFN1-MT0W inch 30.3 11.8 21.9 33.1 19.2 11.7 MOB30-09HFN1-MX0W MOB30-12HFN1-MV0W MOB30-12HFN1-MT0W MOB01-09HFN1-MW0W inch 31.5 13.1 21.8 34.3 20.2 13.4 MOB01-12HFN1-MV0W MOCA01-18HFN1-MT0W MOCA30-18HFN1-MT0W inch...
  • Page 27 MOD30-24HFN1-MT0W 1030 MOD31-24HFN1-MT0W inch 37.2 16.1 31.9 40.6 26.5 15.9 MOD30U-36HFN1-M...
  • Page 28 Model 1333 1045 MOE30U-48HFN1-M inch 37.5 16.3 52.5 41.1 25.0 15.9...

  • Page 29: Service Space

    4. Service Space 4.1 Indoor Unit Duct Units Ensure enough 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 pipe. The hole size as following Cassette Units Unit: mm...
  • Page 30 Console Unit Ceiling-floor Units...

  • Page 31: Outdoor Unit

    4.2 Outdoor Unit (Wall or obstacle) More than 30cm(11.81in) Air inlet More than 60cm More than 30cm (23.62in) (11.81in) Maintain channel More than 60cm Air inlet (23.62in) Air outlet More than 200cm(78.74in)

  • Page 32: Refrigerant Cycle Diagram

    5. Refrigerant Cycle Diagram INDOOR OUTDOOR Electronic CAPILIARY TUBE expansion valve LIQUID SIDE 2-WAY VALVE T3 Condenser temp. sensor HEAT EXCHANGE (EVAPORATOR) HEAT T4 Ambient T1 Room temp. T2 Evaporator EXCHANGE temp. sensor sensor temp. sensor (CONDENSER) middle T2B Evaporator temp.

  • Page 33: Wiring Diagram

    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 CFAU-09HRFN1-M(C), CFAU-12HRFN1-M(C) MCD-36HRFN1-M(C)， MCD-48HRFN1-M(D)
  • Page 35 CTBU-36HWFN1-M(C), CTBU-48HWFN1-M(C)
  • Page 36 MUEU-18HRFN1-M(C), MUEU-24HRFN1-M(C) MUE-36HRFN1-M(C)
  • Page 37 MUE-48HRFN1-M(C) MUE-36HRFN1-M(C)，MUE-48HRFN1-M(C)

  • Page 38: Outdoor Unit

    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 MOBA30-09HFN1-MT0W，MOB30-12HFN1-MT0W...
  • Page 40 MOD30-24HFN1-MT0W ，MOD01-23HFN1-MT0W...
  • Page 41 MOD30U-36HFN1-M...
  • Page 42 MOE30U-48HFN1-M PCB board of MOB30-09HFN1-MX0W, MOB30-12HFN1-MV0W, MOCA30-18HFN1-MT0W, MOB01-09HFN1-MW0W, MOB01-12HFN1-MV0W, MOCA01-18HFN1-MT0W, MOCA31-18HFN1-MT0W MOD31-24HFN1-MT0W 290-330VDC standby 210-300VDC running connect to the DR module bridge connect to reactance connect to earth fuse 250V 30A [V1.8] 2015-01-16 CN22 R141 CN6-1 PTC1 DSA1 R154 N-IN R155 R153 power supply 208-230V AC connect to the terminal...
  • Page 43 For MOD30-24HFN1-MT0W, MOD01-23HFN1-MT0W, MOD30U-36HFN1-M Connect to the Indoor evap.pipe out temp. sensor T2B-A、T2B-B、T2B-C、T2B-D、T2B-E external drive DC fan 6 5 4 3 2 1 motor connector Electric Expansion testPort Electric Expansion Electric Expansion Electric Expansion Electric Expansion external drive DC fan Value C external drive DC fan connect to detector...
  • Page 44 For MOBA30-09HFN1-MT0W, MOB30-12HFN1-MT0W LED101 status light (Red) Connect to DR module FUSE1 20A/250VAC slow flicker:standby（ 0.5Hz ） Connect to reactor quick flicker:error（ 2Hz ） continuous light: normally running power supply 17122000002718 CN1A CN10 DR_N DAS1 CN3_1 L3 L2 connect to earth power supply 208-230V AC connect to the terminal...
  • Page 45 IPM board of MOD30-24HFN1-MT0W, MOD01-23HFN1-MT0W, MOD30U-36HFN1-M connect to DC fan motor TO MAIN 0VAC (standby) CN19 CN55 10-200VAC (running) EU-KFR105W/BP2T3N1-350(767).D.13.MP2-1 202302141237 IC17 IC11 R114 R107 IC12 IPM2 R111 IC16 CN57 R174 C103 R144 R147 R182 C102 C101 R179 CN57 R184 C106 R180 C105...

  • Page 46: Static Pressure

    7. Fan Curves Static Pressure ENC2 Range In. WG (Pa) Model 0.02 0.04 0.08 0.12 0.16 0-0.18 Model≤12 (10) (20) (30) (40) (0-45) 0.04 0.10 0.14 0.18 0.22 0-0.28 Model Model=18 (10) (25) (35) (45) (55) (0-70) (K Btu/h) 0.04 0.10 0.16 0.22...
  • Page 47 CTBU-09HWFN1-M(C), Code 0 Code 1 Code 2 Code 3 Code 4...
  • Page 48 CTBU-12HWFN1-M(C) Code 0 Code 1 Code 2 Code 3 Code 4...
  • Page 49 CTBU-18HWFN1-M(C) Code 0 Code 1 Code 2 Code 3 Code 4...
  • Page 50 CTBU-24HWFN1-M(C) Code 0 Code 1 Code 2 Code 3 Code 4...
  • Page 51 CTB-36HWFN1-M(C) Code 0 Code 1 Code 2 Code 3 Code 4...
  • Page 52 CTB-48HWFN1-M(C) Code 0 Code 1 Code 2 Code 3 Code 4...

  • Page 53: Electric Characteristics

    8 Electric Characteristics Indoor Unit Model Voltage Min. Max. CCA3U-09HRFN1-M(C) 208-230V 187V 253V CTBU-09HWFN1-M(C) 208-230V 187V 253V CFAU-09HRFN1-M(C) 208-230V 187V 253V CCA3U-12HRFN1-M(C) 208-230V 187V 253V CTBU-12HWFN1-M(C) 208-230V 187V 253V CFAU-12HRFN1-M(C) 208-230V 187V 253V CCA3U-18HRFN1-M(C) 208-230V 187V 253V CTBU-18HWFN1-M(C) 208-230V 187V...

  • Page 54: Sound Level

    9 Sound Level 9.1 Indoor unit Concealed Duct Type Discharge Suction Duct Duct 1.4m Microphone Noise level dB(A) Model CTBU-09HWFN1-M(C) CTBU-12HWFN1-M(C) CTBU-18HWFN1-M(C) CTBU-24HWFN1-M(C) CTBU-36HWFN1-M(C) CTBU-48HWFN1-M(C)
  • Page 55 1.4m Microphone Noise level dB(A) Model CCA3U-09HRFN1-M(C) CCA3U-12HRFN1-M(C) CCA3U-18HRFN1-M(C) MCD-24HRFN1-M(C) MCD-36HRFN1-M(C) MCD-48HRFN1-M(C)
  • Page 56 Microphone 1.5m Noise level dB(A) Model CFAU-09HRFN1-M(C) CFAU-12HRFN1-M(C) Microphone 1 . 5 m Air outlet side Microphone Noise level dB(A) Model MUBU-18HRFN1-M(C) MUEU-24HRFN1-M(C) MUE-36HRFN1-M(C) MUE-48HRFN1-M(C)

  • Page 57: Outdoor Unit

    9.2 Outdoor unit Outdoor Unit Microphone 1.0m Note: H= 0.5 × height of outdoor unit Model Noise Level dB(A) MOB30-09HFN1-MX0W MOB01-09HFN1-MW0W MOB30-12HFN1-MV0W MOB01-12HFN1-MV0W MOCA30-18HFN1-MT0W MOCA01-18HFN1-MT0W MOD30-24HFN1-MT0W MOD01-23HFN1-MT0W MOBA30-09HFN1-MT0W MOB30-12HFN1-MT0W MOCA31-18HFN1-MT0W MOD31-24HFN1-MT0W MOD30U-36HFN1-M MOE30U-48HFN1-M...

  • Page 58: Accessories

    10 Accessories Duct Units Name Shape Quantity Soundproof / insulation sheath Tubing & Fittings Binding tape Seal sponge Drain joint Drainpipe Fittings (for cooling & heating) Seal ring Wired controller & Its Frame Wired controller ， Owner s manual Others Installation manual Magnetic ring (twist the electric wires L EMS &...
  • Page 59 provided the following Remote controller holder accessories) Mounting screw(ST2.9×10 -C-H) Remote controller manual Alkaline dry batteries (AM4) Owner's manual Others Installation manual Installation accessory Expansible hook (The product you have might not be provided the Installation hook following accessories Orifice Console Units Name Shape...

  • Page 60: The Specification Of Power

    11 The Specification of Power Type 9K-18K Phase 1-phase 1-phase Power Frequency and Voltage 208-230V, 60Hz 208-230V, 60Hz Circuit Breaker/ Fuse (A) 25/20 40/30 Indoor Unit Power Wiring (mm Ground Wiring Indoor/Outdoor Outdoor Unit Power Wiring 3×2.5 3×2.0 Connecting Strong Electric Signal 4×1.0 4×1.5 Wiring...
  • Page 61 12 Field Wiring 36K, 48K...

  • Page 62: Installation Details

    blockage of the heat exchanger in the 12 Installation Details outdoor unit.  If is built over the unit to prevent direct sunlight, rain exposure, direct strong wend, 12.1 Location selection snow and other scraps accumulation, make Indoor unit location selection 12.1.1 sure that heat radiation from the condenser ...
  • Page 63 Size of outline dimension mounted Capacity(KBtu) plug 29.13 13.78 29.13 13.78 12.2.1.6 Install the air duct 37.80 13.78 Please design duct below 37.80 13.78 recommended picture 1180 46.46 19.29 1240 48.82 19.69 12.2.1.3 Install the pendant bolt Select the position of installation hooks 12.2.1.7 Change the air inlet direction ①...
  • Page 64 ③ When install the filter mesh, please plug it into flange inclined from air return opening, and then push up. ④ The installation has finish, upon filter mesh 12.2.2.2 Bolt pitch which fixing blocks have been insert to the flange positional holes. 12.2.2.3 Install the pendant bolt 12.2.2 Compact...
  • Page 65 If the ceiling is extremely high, please determine the length of the installation hook depending on the real situation. 12.2.2.4 Install the main body Make the 4 suspender through the 4 hanger of the main body to suspend it. Adjust the 12.2.2.5 Install the panel hexangular nuts on the four installation hooks Remove the grille...
  • Page 66 (The bottom of body can touch with floor or suspended, but the body must install vertically.) Hang the air-in grill to the panel, then connect the lead terminator of the swing motor and that control with corresponding 14.2.4 Ceiling-floor unit installation terminators on the body respectively.
  • Page 67 ② Wall-mounted installation 12.2.4.3 Install the pendant bolt Locate the hanging arm on the hanging screw ① Ceiling installation bolt. Prepare the mounting bolts on the unit. Select the position of installation hooks according to the hook holes positions showed in upper picture.
  • Page 68 12.2.5 Slim cassette indoor unit Select the position of installation hooks installation according to the hook holes positions showed 12.2.5.1 Service space for indoor unit in upper picture. Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling. Then embed the expansible hooks (fittings).

  • Page 69: Outdoor Unit Installation

    Tighten the screws under the panel hooks till the panel closely stick on the ceiling to avoid condensate water. 12.2.5.5 Install the panel Remove the grille 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: Refrigerant Pipe Installation

    Considering the allowable pipe length and height drop to decide the installation position. More than 60cm Make sure the distance and height drop (23.62in) between indoor and outdoor unit not exceeded the date in the following table. Max. Length Max. Elevation Model 9,000Btu/h 82.2...
  • Page 71 Flare 3/4" (19) 990~1210 9270~11860 dimension Pipe Flare shape (mm) diameter 12.4.3 First-Time Installation Air and moisture in the refrigerant system 1/4" cause the following problems: 90 ° 4 ● Increases in system pressure (6.35) ● Increases in operating current 3/8"...
  • Page 72 5) Turn on the vacuum pump to begin After purging the air, use a torque wrench to evacuation. tighten the flare nut on the 2-way valve. 6) Conduct a 30-minute evacuation. Check 4). Check for gas leaks. whether the compound meter indicates Check the flare connections for gas leaks.
  • Page 73 3) Place the charging cylinder onto the 5). Turn on the air conditioner in cooling mode. electronic scale and record the weight. Turn when gauge indicates 4) Turn on the air conditioner in cooling mode. -0.1MPa(14.5Psi). 5) Open the valves (Low side)on the charge set 6).Immediately close the 3-way valve and charge the system with liquid refrigerant.

  • Page 74: Drainage Pipe Installation

    6). Disconnect the charge set and the charging Procedure: cylinder, and open the 2-way and 3-way valves 1). Connect the charge hose to the charging Be sure to use a hexagonal wrench to operate cylinder. Open the 2-way 3-way valve. the valve stems.
  • Page 75  Ensure at least 1/100 slope of the drainage Attention: Adopt PVC40 or bigger pipe to be the pipe main pipe.  Adopt suitable pipe diameter For Vertical drainage pipe (The following  Adopt nearby condensate water discharge table is for reference) Reference Allowable 12.5.2 Key points of drainage water pipe...
  • Page 76 Drainage pipe Drainage pipe Drain tee Drainage pipe Water flow Hanger Water flow Water flow Water flow Water flow Down incline pipe Drain tee Drain tee Water flow Water flow A:Length of horizontal pipe ≤ 150mm Water flow Water flow B: Lift height ≤...

  • Page 77: Vacuum Drying And Leakage Checking

    drainage outlet. (In light of the length of drainage pipe, water shall be discharged about 1 minute delayed) 2.3 Stop the operation of air conditioner, power off the power supply and put the cover of water test hole back to the original place. After stopped the air conditioner 3 minutes, check whether there is anything abnormal.

  • Page 78: Additional Refrigerant Charge

    Ice-blockage shall cause abnormal Special vacuum drying operation of system, while copper oxide The special vacuum drying method shall be shall damage compressor.  adopted when: Eliminating the non-condensable gas (air) in system to prevent the components  Finding moisture during flushing refrigerant oxidizing, pressure fluctuation and bad heat pipe.

  • Page 79: Engineering Of Insulation

     After the vacuum drying process is carried out, the additional refrigerant charge Purpose of refrigerant pipe insulation  process needs to be performed. During operation, temperature of gas pipe  The outdoor unit is factory charged with and liquid pipe shall be over-heating or refrigerant.

  • Page 80: Engineering Of Electrical Wiring

      The insulation material at the joint pipe All field wiring construction should be shall be banded to the gap pipe and liquid pipe finished by qualified electrician.  tightly. Air conditioning equipment should be  The linking part should be use glue to paste grounded according to the local electrical together regulations.
  • Page 81  The gas-side and liquid-side stop values are both opened.  The air conditioner is pre-heated by turning on the power. Test operation Set the air conditioner under the mode of "COOLING" by remote controller, and check the following points. Indoor unit ...

  • Page 82: Operation Characteristics

    13. Operation Characteristics Temperature Cooling operation Heating operation Drying operation Mode 0℃～30℃ 10℃～32℃ Room temperature 17℃～32℃(62℉～90℉) (32℉～86℉) (50℉～90℉) 0℃～50℃ (32℉～122℉) Outdoor temperature -15℃～30℃ （-15℃～50℃(5℉～122℉)：For (Entry level) (5℉～86℉) the models with low temperature 0℃～50℃ cooling system） (32℉～122℉) Outdoor temperature -25℃～30℃ -25℃～50℃(-13℉～122℉) (E-Star level) (-13℉～86℉) Outdoor temperature...

  • Page 83: Electronic Function

    14. Electronic Function 14.1 Abbreviation T1: Indoor room temperature T2: Coil temperature of indoor heat exchanger middle. T2B: Coil temperature of indoor heat exchanger outlet. 14.2.1 Icon explanation on indoor display board T3: Coil temperature of condenser (Ceiling Floor) T4: Outdoor ambient temperature T5: Compressor discharge temperature Td: Target temperature 14.2 Display function...

  • Page 84: Operation Modes And Functions

    3 times when fan motor restarts continuously, ---T3>60° C (140° F ) seconds, the unit will stop and the LED will display the compressor will stop until T3<52° C (125.6° F ). failure. 14.3.10 Evaporator low temperature T2 When outdoor fan speed keeps too low (lower protection than 100RPM) or too high (higher than ---T2<0°...
  • Page 85 In cooling mode, indoor fan runs all the time Setting fan T1-Td+1.5 ℃(34.7° F ) Actual fan speed speed and the speed can be selected as high, -1.5(29.3°F) H-（H-=H-G) -3.0(26.6°F) medium, low and auto. H（=H） -4.5(23.9°F) H+(H+=H+G) The indoor fan is controlled as below: -1.5(29.3°F) M-(M-=M-Z) -3.0(26.6°F)
  • Page 86 no longer than 10min for 15 minutes and then choose mode Compressor X1 10S according to T1-Ts. If the setting temperature is modified, the machine will choose running function again. 4-Way valve 14.4.5 Drying mode Outdoor fan Drying mode works the same as cooling mode in low speed.
  • Page 87 setting temperature stops rising and indoor fan the room temperature detected from its own is fixed at low speed. (Anti-cold wind function room temperature sensor setting has the priority). temperature. 14.4.7.3 Operation time in sleep mode is 7 hours. After 7 hours the AC quits this mode and 14.4.10 8℃...
  • Page 88 Point check function Press the LED DISPLAY or LED or MUTE button of the remote controller three times, and then press the AIR DIRECTION or SWING button three times in ten seconds, the buzzer will keep ring for two seconds. The air conditioner will enter into the information enquiry status. You can press the LED DISPLAY or AIR DIRECTION button to check the next or front item’s information.
  • Page 89 Enquiry Display value Meaning Remark information T1,T2,T3,T4, -1F,-1E,-1d,-1c,- -25,-24,-23,-22,-21,-2 1. All the displaying temperature is actual T2B,TP,TH, 1b,-1A value. Targeted -19—99 -19—99 2. All the temperature is ° C no matter what A0,A1,…A9 100,101,…109 Frequency, kind of remote controller is used. b0,b1,…b9 110,111,…119 Actual...

  • Page 90: Troubleshooting

    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.100Ω 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).

  • Page 91: Indoor Unit Error Display

    16.1 Indoor Unit Error Display Operation Timer lamp Display LED STATUS lamp ☆ 1 time Indoor unit EEPROM parameter error Communication malfunction between indoor and ☆ 2 times outdoor units ☆ 4 times Indoor fan speed malfunction ☆ 5 times Indoor room temperature sensor (T1 ) malfunction ☆...

  • Page 92: Outdoor Unit Error Display

    16.2 Outdoor unit error display For 9K-24K outdoor unit: LED2 LED1 Problems IU display (Green) (Red) standby for normal Operation normally ☆ Compressor drive board EEPROM error ☆ IPM malfunction or IGBT over-strong current protection Over voltage or too low voltage protection ☆...

  • Page 93: For 36K-48K Outdoor Unit

    For 36K-48K Outdoor Unit Problems Error Code Communication malfunction between indoor and outdoor units Current overload protection Outdoor ambient temperature sensor (T4 ) malfunction Condenser coil temperature sensor (T3) malfunction Compressor discharge temperature sensor (T5) malfunction Outdoor unit EEPROM parameter error Outdoor fan speed malfunction Inverter module (IPM) malfunction Over-voltage or under-voltage protection...
  • Page 94 will show “-9”.If the temp. is higher than 70 degree, the digital display tube will show “70”. If the indoor unit is not Outdoor ambient temp.(T4) connected, the digital display tube will show: “――” The display value is between 13~129 degree. If the temp. is lower than 13 degree, the digital display tube will show “13”.If the temp.
  • Page 95 connected, the digital display tube will show: “――” Actual data*HP*10 1# Indoor unit capacity demand code If capacity demand code is higher than 99, the digital display tube will show single digit and tens digit. (For example, the digital display tube show “5.0”,it means the capacity demand 2# Indoor unit capacity demand code is 15.

  • Page 96: Diagnosis And Solution

    16.3 Diagnosis and Solution 16.3.1 EEPROM parameter error diagnosis and solution (E0/F4) E0/F4 Error Code Malfunction conditions Indoor or outdoor PCB main chip does not receive feedback from EEPROM chip. Potential causes Installation mistake ● Faulty PCB ● Trouble shooting: Power off, then restart the unit 2 minutes later.
  • Page 97 16.3.2 Communication malfunction between indoor and outdoor units diagnosis and solution (E1) For 9K-24K: Error Code Malfunction conditions If the indoor unit does not receive feedback from outdoor unit for 110 seconds 4 consecutive times. Potential causes Wiring mistake ● Faulty indoor or outdoor PCB ●...
  • Page 98 Remark: Use a multimeter to test the DC voltage between 2 port and 3 port of outdoor unit. The red pin of multimeter connects with 2 port while the black pin is for 3 port. When AC is normal running, the voltage will move alternately between -50V to 50V.
  • Page 99 For 36K-48K: Malfunction Indoor unit does not receive feedback from outdoor unit for 60 conditions seconds OR outdoor unit does not receive feedback from indoor unit for 120 seconds. ● Wiring mistakes Possible causes ● Faulty indoor or outdoor PCB E1 displayed E1 displayed Communication malfunction between indoor...
  • Page 100 16.3.3 Fan speed malfunction diagnosis and solution (E3) Error Code Malfunction conditions When indoor fan speed is too low (300RPM) for a certain period of time, the unit ceases operation and the LED displays a failure code. Potential Causes Wiring mistake ●...
  • Page 101 Index 1: 1. Indoor DC fan motor (Control Chip is in Fan Motor) Turn power on and while the unit is on standby, measure the voltage between pin1 and pin3 as 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.
  • Page 102 16.3.4 Open or short circuit of temperature sensor diagnosis and solution (E4/E5/F1/F2/F3) Error Code E4/E5/F1/F2/F3 Malfunction conditions If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED displays a failure. Potential causes Wiring mistake ● Faulty sensor ●...
  • Page 103 16.3.5 Refrigerant Leakage Detection diagnosis and solution (EC) Error Code Malfunction conditions Define the evaporator coil temperature T2 of the compressor starts running as Tcool. If the following occurs 3 times, the display shows "EC" and the unit switches off: In the first 8 minutes after the compressor starts up, if T2 ＜...
  • Page 104 Water-level alarm malfunction 16.3.6 diagnosis and solution Error Code Malfunction conditions If the sampling voltage is not 5V, the LED will display the failure code. ● Wiring mistakes Possible causes ● Faulty water-level switch ● Faulty water pump ● Faulty indoor PCB Power off, then restart the unit 3 minutes Power off, then restart the unit 3 minutes later.
  • Page 105 16.3.7 IPM malfunction or IGBT over-strong current protection diagnosis and solution (P0) Error Code Malfunction When the voltage signal the IPM sends to the compressor drive conditions chip is abnormal, the display LED shows “P0” and the AC turn off. Possible causes Wiring mistake ●...
  • Page 108 16.3.8 Over voltage or too low voltage protection diagnosis and solution (P1) Error Code Malfunction conditions Abnormal increases or decreases in voltage are detected by checking the specified voltage detection circuit. Potential causes Power supply issues ● System leakage or blockage ●...
  • Page 109 16.3.9 High temperature protection of compressor top diagnosis and solution (P2) Error Code Malfunction decision If the sampling voltage is not 5V, the LED will display the failure. conditions Power supply problems. ● Supposed causes System leakage or block ● PCB faulty ●...
  • Page 110 High temperature protection of IPM board diagnosis and solution (P2) High temperature protection of IPM High temperature protection of IPM board board Check whether the radiator Check whether the radiator Fix the radiator well Fix the radiator well is fixed well ? is fixed well ? Check whether electronic Check whether electronic...
  • Page 111 16.3.10 Inverter compressor drive error diagnosis and solution(P4) Error Code Malfunction conditions Abnormalities in the inverter compressor drive is detected by a special detection circuit, which can perform communication signal detection, voltage detection, and compressor rotation speed signal detection. Potential causes Wiring mistake ●...

  • Page 112: Main Parts Check

    16.3.11 Outdoor IPM module temperature sensor malfunction diagnosis and solution (P7) Error Code Malfunction conditions If the sampling voltage is lower than 0.06V or higher than 4.94V, the LED displays a failure. Potential causes Wiring mistake ● Faulty sensor ● Faulty PCB ●...
  • Page 113 Appendix 1 Temperature Sensor Resistance Value Table for T1,T2,T3,T4 (℃--K) ℃ ℉ ℃ ℉ ℃ ℉ ℃ ℉ K Ohm K Ohm K Ohm K Ohm 115.266 12.6431 2.35774 0.62973 108.146 12.0561 2.27249 0.61148 101.517 11.5 2.19073 0.59386 96.3423 10.9731 2.11241 0.57683 89.5865...
  • Page 114 Appendix 2 Temperature Sensor Resistance Value Table for T5,TH (℃--K) ℃ ℉ ℃ ℉ ℃ ℉ ℃ ℉ K Ohm K Ohm K Ohm K Ohm 542.7 68.66 13.59 3.702 511.9 65.62 13.11 3.595 62.73 12.65 3.492 455.9 59.98 12.21 3.392 430.5 57.37...
  • Page 115 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 ℉...
  • Page 116 2. Compressor checking Measure the resistance value of each winding by using the tester. Position Resistance Value ASN98D22UFZ ASM135D23UFZ ATF235D22UMT ATF250D22UMT ATF310D43UMT ATQ420D1UMU ATM115D43UFZ2 Blue - Blue - 1.57Ω 1.75 Ω 0.75 Ω 0.75 Ω 0.65 Ω 0.38Ω 1.87Ω Black Red - Blue...
  • Page 117 3. IPM continuity check Turn off the power, let the large capacity electrolytic capacitors discharge completely, and dismount the IPM. Use a digital tester to measure the resistance between P and UVWN; UVW and N. Digital tester Normal resistance value Digital tester Normal resistance value (+)Red...
  • Page 118 Heating Chart: HEATING MODE Outdoor temp. ℉ Indoor (℃) Temp. 57 (13.89) 47 (8.33) 37 (2.78) (-2.78) (-8.33) 30.3 28.5 25.3 22.8 20.8 32.5 30.0 26.6 25.4 23.3 33.8 31.5 27.8 26.3 24.9 3.03 2.85 2.53 2.28 2.08 3.25 3.00 2.66 2.54 2.33...

  • Page 119: Disassembly Instructions

    17. Disassembly Instructions Note: This part is for reference, the photos may have slight difference with your machine. 17.1 Indoor unit  Duct Unit Parts name Procedures Remarks Remove the 1) Screw off the screws to electronic remove the cover of control box electronic control box Four screws...
  • Page 120 3）Move the display board according to the arrow direction to disassemble Remove the 1) Remove the cover of Repeat the operation of step1 of No1 electronic control box Pull out all the plugs or connectors connected to the PCB and remove the ground wire after remove the screw.
  • Page 121 Remover 1) Screw off the fixing the fan screws to remove the motor rear cover board Rear cover board 5 screws 2) Screw off the fixing screws to remove the Rear beam rear beam Total four screws at the left side and right side 3) Remove room Cut off the fastening temperature sensor...
  • Page 122 Remove the 1) Remove the rear cover Repeat the operation of step1 of No.5 water board collector 2) Screw off the screws to 4 screws assembly remove the water collector assembly 3 screws 3 screws 3 screws Water collector assembly Remove the 1) Remove the water Repeat the operation of No.6...
  • Page 123 4) Remove the evaporator support board 4 screws 5) Screw off the fixing screws to remove the evaporator 1 screw...
  • Page 124  Cassette Unit Parts name Procedures Remarks Remove the 3) Open the grille filter Grill switch 4) Remove the filter Note: the filter is easy to be damaged, be careful when removing it. Remove the 4) Open the grille Repeat the operation of step1 of No.1 panel 5) Remove the grille ...
  • Page 125 board cover(4 screws)  Remove the display board(4 screws) 4 screws Remove the 1) Remove the panel Repeat the operation of step1,2,3 of No.2 swing 2) Screw off 3 screws to motor remove the swing motor assy. 3 screws 3) Screw off 1 screws to remove the swing motor.
  • Page 126 3) Pull out all the Indoor fan Pump Water lever Temp. sensors connection wires to other parts, then the PCB can be replaced. Swing motor Power Input Display board 4) There are 2 buckles fixing the PCB. To draw out the PCB, you should open them.
  • Page 127 3) Remove the fixing nut to disassemble the fan wheel 4) Pull out the fan wheel Remove the 1) Repeat the operation of fan motor No.6 2) Remove the fixing board of fan motor wire 3 nuts 3) Remove the 5 screws to disassemble the fan motor 5 screws...
  • Page 128 assembly 8) Screw off the 4 screws inside 4 holes (1 is under a protection cover) to remove the water collecting assembly. 9) Take out the water collecting assembly Remove the 1) Remove the panel Repeat the operation of No.2 draining 2) Remove the electronic Repeat the operation of No.6...
  • Page 129 6) There are 2 screws under the supporter to fixing the pump. Release them to take the pump out of the supporter. Remove the 1) Remove the water Repeat the operation of No.9 evaporator collecting assembly 2) Remove the seal board of evaporator 3 screws 3) Remove the evaporator...
  • Page 130  Console Unit No. Parts Procedures Remarks push push name Remove 1) Slide the two the Filter stoppers on the left and right sides to open the front panel 2) Remove the filter.  Open the front panel Remove 1) Remove the air Repeat the operation of step1 of No.1 front panel ...
  • Page 131 4) Remove the installation plate of electric parts 5) Remove the fixing board of electronic control box 6) Disconnect the DC motor wire, 2 louver motor Louver motor connector wires, evaporator coil Screws of the grounding wire temperature sensor(T2) wire, Louver motor connector and two DC motor connector...
  • Page 132 2) Disconnect all the wires of plugs connected to the PCB 3) Remove two fixing screws to remove the PCB 2 screws Remove 1) Remove the Repeat the operation of step1~step of No2. the display electronic board control box 2) Remove the fixing glue to remove the display board...
  • Page 133 2) Remove the 1 fixing screw to remove air outlet grille 1 screw assembly 3) Disconnect louver motor wire Repeat the operation of No.7 to remove the air outlet grille Remove 1) Remove the air assembly the louver outlet grille motor of assembly air outlet...
  • Page 134 2) Disconnect louver motor wire Louver motor connector 3) Remove 4 fixing screws to disassemble the water collector 4 screws Repeat the operation of No.2 to remove the electronic control Remove 1) Remove the electronic evaporator control box Repeat the operation of No.7 to remove the air outlet grille assembly 2) Remove the air assembly...
  • Page 135 4) Remove the evaporator assembly Repeat the operation of No.2 to remove the electronic control Remove 1) Remove the electronic centrifugal control box Repeat the operation of No.7 to remove the air outlet grille 2) Remove the air assembly outlet grille assembly 3) Remove four fixing screws to...

  • Page 136: Outdoor Unit

    17.2 Outdoor unit  MOB01-09HFN1-MW0W, MOB01-12HFN1-MV0W Part name Procedures Remarks Panel plate How to remove the panel plate. 1)Stop operation of the air conditioner and turn “OFF” the power breaker. 2) Remove the big handle Screws of top panel(3 screws,1 screws is under the big handle) first,then remove the top cover (3 screws) 3 screw of...
  • Page 137 Fan ass’y Electronic control box 1)After remove the panel plate following procedure 1 reactor Compressor and liquid-gas separator 2) Remove the nut fixing ○ the fan,and remove the fan. ○ 3) Unfix the hooks and then open the electronic control box cover.
  • Page 138 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.
  • Page 139 Electrical How to remove the parts electrical parts. After finish work of ○ item 1 and item 2, remove the two connectors for the compressor and the reactors. ○ Pull out the two blue wires connected with the four way valve. ○...
  • Page 140 heater connector. ○ 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 control box.
  • Page 141 Four-way How to remove the valve The picture of four-way valve may be different from four-way valve. the one on your side. Perform work of item 错误! ○ 1,2,3. Recover refrigerant from the refrigerant circuit. Remove the screw of the coil and then remove the coil.
  • Page 142  MOCA01-18HFN1-MT0W Part name Procedures Remarks Panel plate How to remove the panel plate. 4 screws of top panel 1) Stop operation of 3 screws of the air conditioner and turn big handle “OFF” the power breaker. 9 screws of front panel 2) Remove the top panel(7 ○...
  • Page 143 ○ 1) After remove the panel 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. Compressor wire T3,T4,T5 sensor wire Motor wire Electronic expansion valve Electric pipe heater and Crankcase electric heater...
  • Page 144 connector for fan motor from the electronic control board. ○ 4) Remove the four fixing screws of the fan motor. 5) Then remove the fan motor. Electrical How to remove the ○ parts electrical parts. 1) After finish work of item 1 and item 2, remove the connectors for the compressor and reactor.
  • Page 145 four way valve. ○ ○ 3) Pull out connectors 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 compressor ○ Crankcase electric heater...
  • Page 146 6) Remove the grounding screw. 7) Remove the power 错误! supply wires(old label, L1,L2,S; new label 1,2,3). 8) Then remove the electronic control box. ○...
  • Page 147 Four-way How to remove the valve The picture of four-way valve may be different from four-way valve. the one on your side. 1) Perform work of ○ item1,2,3. 2) Recover refrigerant from the refrigerant circuit. 3) Remove the screw of the coil and then remove the coil.
  • Page 148  MOD01-23HFN1-MT0W Part name Procedures Remarks Panel plate How to remove the panel 3 screws of top panel plate. 1) Stop operation of the air conditioner and turn “OFF” the power breaker. 4 screws of big handle 11 screws of front panel ○...
  • Page 149 ○ 1) After remove the panel plate following procedure 1, remove the hex nut fixing the fan and then remove the fan. ○ 2) Unfix the hooks and screws,then open the electronic control box cover. Compressor wire T3,T4,T5 sensor wire 4 way valve Electric pipe heater Electronic expansion...
  • Page 150 ○ Remove the four fixing screws of the fan motor. ○ 3) Then remove the fan motor. ○ Electrical How to remove the parts electrical parts. 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...
  • Page 151 ○ and discharge temp. sensor(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 electronic control box.
  • Page 152 Four-way How to remove the valve The picture of four-way valve may be different from four-way valve. the one on your side. ○ ○ 1) Perform work of item1,2,3. 2) Recover refrigerant from the refrigerant circuit. 3) Remove the screw of the coil and then remove the coil.
  • Page 153  MOBA30-09HFN1-MT0W Part name Procedures Remarks Panel plate How to remove the panel Screws of top panel (3 screws,1 screws is under the big handle) plate. 3 screw of Stop operation of the big handle air conditioner and turn “OFF” the power breaker. Remove the big handle first,then remove the top cover (3 screws)
  • Page 154 panel plate following ○ procedure 1. 2) Remove the nut fixing the fan, and remove the fan. 3) After remove the top cover .Unfix the hooks and ○ then open the electronic control box cover. T3,T4,T5 sensor Electronic expansion valve 4) Disconnect the connector for fan motor Motor...
  • Page 155 5) Remove the four fixing screws of the fan motor, then remove the motor. ④ ○...
  • Page 156 Electrical How to remove the parts electrical parts. After finish work of item 1 and item 2, remove the connector for the compressor . ○ Pull out the two blue wires connected with the four way valve. ○ ○ 3) Pull out connectors of the condenser coil temp.
  • Page 157 electronic expansion valve wire from the control board ④ 5) Remove the ground wires . ○ ○ 6) Remove the wires(1,2,3). 7) Then remove the electronic control box.
  • Page 158 Four-way How to remove the valve The picture of four-way valve may be different from four-way valve. ④ the one on your side. 1）Perform work of item ○ 1,3. 2)Recover refrigerant from the refrigerant circuit. 3)Remove the screw of the coil and then remove the coil.
  • Page 159  MOB30-09HFN1-MX0W, MOB30-12HFN1-MV0W, MOB30-12HFN1-MT0W Part name Procedures Remarks Panel plate How to remove the panel plate. Screws of top panel (3 screws, 1 screw is under the big handler) 1) Stop operation of the air conditioner and 3 screws turn “OFF” the power of the big breaker.
  • Page 160 ○ ass’y. 1) After remove the panel 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 compressor T3,T4,T5 sensor control box cover. 4 way valve Motor Electronic expansion valve...
  • Page 161 3) Disconnect the connector for fan motor ○ from the electronic control board. ○ 4) Remove the four fixing screws of the fan motor. Then remove the fan motor. Electrical How to remove the ○ parts electrical parts. 1) After finish work of item 1 and item 2, remove the connectors for the compressor.
  • Page 162 ○ 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 5) Remove the ○ ○ grounding screw. 6) Remove the Wires (1,2,3). Then remove the electronic control box.
  • Page 163 Four-way How to remove the valve The picture of four-way valve may be different from four-way valve. the one on your side. ○ ○ 1) Perform work of item1,3. 2) Recover refrigerant from the refrigerant circuit. 3) Remove the screw of the coil and then remove the coil.
  • Page 164  MOCA30-18HFN1-MT0W, MOCA31-18HFN1-MT0W Part name Procedures Remarks Panel plate How to remove the panel plate. 1) Stop operation of 3 screws of top panel the air conditioner and turn “OFF” the power 3 screws of breaker. big handle 9 screws of front panel 2) Remove the top panel(3 screws).
  • Page 165 ○ ass’y. 1) After remove the panel plate following procedure 1, remove the hex nut fixing the fan and then remove the fan. ○ 2) After remove the top cover . Unfix the hooks and then open the electronic control box cover.
  • Page 166 from the electronic control ○ board. 4) Remove the four fixing screws of the fan motor. ○ Then remove the fan motor. Electrical How to remove the ○ parts electrical parts. 1) After finish work of item 1 and item 2, remove the connectors for the compressor and reactor.
  • Page 167 ○ four way 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 heaters.
  • Page 168 ○ 6) Remove the grounding screw. 7) Remove the Wires (1,2,3 or L1,L2,S).Then remove the electronic control box. ⑥ ○...
  • Page 169 Four-way How to remove the valve The picture of four-way valve may be different from four-way valve. the one on your side. 1) Perform work of ④ ○ item1,3. 2) Recover refrigerant from the refrigerant circuit. 3) Remove the screw of the coil and then remove the coil.
  • Page 170  MOD30-24HFN1-MT0W, MOD31-24HFN1-MT0W, MOD30U-36HFN1-M Part name Procedures Remarks Panel plate How to remove the panel 4 screws of big handle plate. Screws of top panel(3screws,1screws is under the big handle) 1) Stop operation of the air conditioner and turn “OFF” the power breaker. Screws of big handle (3 screws)
  • Page 171 ass’y. Electronic control box 1) After remove the panel plate following procedure 1 2) Remove the nut fixing the fan,and remove the fan. compressor ○ 3) Unfix the hooks and remove the screws, then ○ open the electronic control box cover.
  • Page 172 Compressor T3,T4,T5,sensor Pressure switch wire ○ 4) Disconnect the connector for fan motor Motor wire Electronic expansion 4 way valve from the electronic control ○ board. 5) Remove the four fixing screws of the fan motor, then remove the motor. ○...
  • Page 173 Electrical How to remove the ○ parts electrical parts. 1) After finish work of item 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 ○...
  • Page 174 ○ 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.
  • Page 175 Four-way How to remove the valve The picture of four-way valve may be different from four-way valve. the one on your side. 1) Perform work of item 1,3. 2) Recover refrigerant from the refrigerant circuit. 3) Remove the screw of the coil and then remove the coil.
  • Page 176  MOE30U-48HFN1-M Part name Procedures Remarks Fan ass’y How to remove the fan ass’y. 1) Stop operation of the air 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.
  • Page 177 screw) 7) Disconnect the fan motor connectors FAN1(3p,white) and ⑥ FAN2(3p,white) from DC motor driver board. 8) Remove the fan motor after ⑦ unfastening fixing screws. ⑧ Panel plate How to remove the panel plate. 1) Remove big handle.(2 screws) and water Screws of big handle...
  • Page 178 Screws of right-rear panel Electrical How to remove the electrical parts parts. 1) Perform work of item 1 step 5~6 and item 2. IPM board DC Fan PCB board Driver board 2) Disconnect the fan motor connector(5p,white) from the IPM board. ②...
  • Page 179 CN2(yellow) CN1(red) CN6(black) CN3(yellow) U、V、W(black) CN9(10p,white) 4) Remove the screws fixing the IPM board and remove the IPM board. Disconnect the connectors and wires connected from PCB and other parts. Connectors: CN8: Discharge temperature sensor CN1/CN3 (2p,white) CN12：Heatsink temperature sensor(2p,red) CN9:T3/T4 temperature sensor (2p/2p,white) CN15: Electronic expansive valve...
  • Page 180 wire (yellow-green) after removing the big handle. ⑥ Remove the PCB board. Compressor How to remove the compressor. 1) Perform work of item 1 step 5~6 and item 2.. 2) Extract refrigerant gas. 3) Remove the sound insulation material and crankcase heating cable.
  • Page 181 The 4-way How to remove the 4-way valve valve 1) Perform work of item 1 step 5~6 and item 2.. Coil 2) Extract refrigerant gas. Welded parts 3) Remove the electrical parts from item 3. 4) Remove fixing screw of the coil, and remove the coil.

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