Midea MCD-18HRFN1-QRC4 Service Manual
  1. Manuals
  2. Brands
  3. Midea Manuals
  4. Air Conditioner
  5. MCD-18HRFN1-QRC4
  6. Service manual

Midea MCD-18HRFN1-QRC4 Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Super Slim Cassette Type
Super Slim Cassette Type V2MC
1. Features ............................................................................... 8
2. Dimensions ........................................................................ 12
3. Service Space .................................................................... 13
4. Wiring Diagrams................................................................ 14
5. Electric Characteristics .................................................... 15
6. Sound Levels ..................................................................... 16
7. Accessories ....................................................................... 17
8. The Specification of Power .............................................. 18
9. Field Wiring ....................................................................... 19
Indoor Units
7

Advertisement

Table of Contents
loading

Related Manuals for Midea MCD-18HRFN1-QRC4

Summary of Contents for Midea MCD-18HRFN1-QRC4

  • Page 1: Table Of Contents

    Super Slim Cassette Type Super Slim Cassette Type V2MC 1. Features ................8 2. Dimensions ................ 12 3. Service Space ..............13 4. Wiring Diagrams..............14 5. Electric Characteristics ............ 15 6. Sound Levels ..............16 7. Accessories ............... 17 8.

  • Page 2: Features

    Features 1. Features Overview  Compact design, super slim body size, less space requiring in installation Each louver can be separately controlled, more comfort air blowing is possible.   Auto-lifting panel design, more convenient to clean and maintain the filter. (optional) Old Cassette New Slim Cassette Reduction...
  • Page 3 Features New air-intake Optional ionizer generator  Ionizer generator is optional to get refreshing air to your room. Ionizer can be switched on or off by remote controller.  When pressing the Clean Air button on the remote controller, Ionizer will work and the indicator light on display board will shine.
  • Page 4 Features External air duct design Reserve external air duct, more flexible for the air supply.  Built-in draining pump  Due to the improvement of structure, more convenient to repair or replace the draining pump. Draining Pump Built-in draining pump to make sure condensed water drain out reliably. ...
  • Page 5 Features Terminals 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. Alarm lamp Long-distance on-off controller Optional touch screen wired controller  Touch screen wired controller is optional, with error code indication function. Better man-machine conversation interface.

  • Page 6: Dimensions

    Dimensions 2. Dimensions Model 18 K 205 >235 24 K 205 >235 30 K 245 >275 245 >275 36 K Indoor Units...

  • Page 7: Service Space

    Service Space 3. Service Space >1000m m >1000mm Indoor Units...

  • Page 8: Wiring Diagrams

    Wiring Diagrams 4. Wiring Diagrams MCD-18HRFN1-QRC4 MCD-18HRFN1-QRC8 MCD-24HRFN1-QRC4 MCD-24HRFN1-QRC8 MCD-30HRFN1-QRC8 MCD-36HRFN1-QRC4 MCD-36HRFN1-QRC8 Indoor Units...

  • Page 9: Electric Characteristics

    Electric Characteristics Electric Characteristics Power Indoor Unit Supply Model Voltage 220-240 220-240 220-240 220-240 Notes: MFA: Max. Fuse Amps. (A) Indoor Units...

  • Page 10: Sound Levels

    Sound Levels Sound Levels 1.4m Microphone Noise level dB(A) Model Noise Power dB(A) Indoor Units...

  • Page 11: Accessories

    Accessories Accessories Name Shape Quantity Installation paper board Installation Fittings Soundproof / insulation sheath Tubing & Fittings Out-let pipe sheath Out-let pipe clasp Drainpipe Fittings Drain joint Seal ring Remote controller & Its Frame Remote controller & Its Frame(The product you Remote controller holder have might not be provided the following...

  • Page 12: The Specification Of Power

    The Specification of Power 8. The Specification of Power Model 18000-24000Btu/h 30000 Btu/h 36000 Btu/h 36000 Btu/h Phase 1-phase 1-phase 1-phase 1-phase Frequency 220-240V, 50Hz 220-240V, 50Hz 220-240V, 50Hz 220-240V, 50Hz Voltage INDOOR UNIT POWER WIRING POWER 3×1.0 3×1.0 3×1.0 3×1.0 CIRCUIT BREAKER 15/10...

  • Page 13: Field Wiring

    Field Wiring 9. Field Wiring Indoor Units...
  • Page 14 Duct Type Duct Type V2MD 1. Features ................21 2. Dimensions ................ 24 3. Service Space ..............25 4. Wiring Diagrams..............26 5. Static Pressure ..............28 6. Electric Characteristics ............ 30 7. Sound Levels ..............31 8. Accessories ............... 32 9.

  • Page 15: Features

    Features Features 1.1 Installation accessories: (Optional) Front Board, Canvas Air Passage, Filter, Panel, for easy installation  Front Board Canvas Air Passage Filter Panel 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. ...
  • Page 16 Features  Replace the motor or centrifugal fan Remove the ventilated panel firstly. Remove a half of blower housing and take out the motor with centrifugal fan. Directly remove two bolts, and then replace the motor or centrifugal fan easily. Motor Blower Housing Ventilated Panel...
  • Page 17 Features 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 10m. The unit will realized remoter control. ...

  • Page 18: Dimensions

    Dimensions Dimensions Size of outline Outline dimension(mm) Air outlet opening size Air return opening size dimension mounted Capacity plug (KBtu) 210 635 570 18/24 270 635 570 30/36 1140 270 775 710 1035 1180 Indoor Units...

  • Page 19: Service Space

    Service Space Service Space Ensure enough space required for installation and maintenance. All the indoor units reserve the hole to joint the fresh air pipe. The hole size as following: Indoor Units...

  • Page 20: Wiring Diagrams

    Wiring Diagrams Wiring Diagrams 12K / 24K / 30K / 36K Indoor Units...
  • Page 21 Wiring Diagrams MTB-24HWDN1-QRC4 Indoor Units...

  • Page 22: Static Pressure

    Static Pressure Static Pressure 12,000Btu/h 18,000Btu/h Super high speed High speed Super high speed Mid speed High speed Mid speed Low speed Low speed 600 700 800 900 1000 1100 1200 Air volume(m /h) Air volume(m /h) 24,000Btu/h 30,000Btu/h Super high speed High speed Mid speed Low speed...
  • Page 23 Static Pressure 36,000Btu/h Super high speed High speed Mid speed Low speed 1200 1400 1600 1800 2000 1100 2200 2400 Air volume(m /h) Indoor Units...

  • Page 24: Electric Characteristics

    Electric Characteristics Electric Characteristics Indoor Unit Power Supply Model Voltage Min. Max. 220-240 220-240 220-240 220-240 220-240 Note: MFA: Max. Fuse Amps. (A) Indoor Units...

  • Page 25: Sound Levels

    Sound Levels Sound Levels Concealed Duct Type Discharge Suction Duct Duct 1.4m Microphone Noise level dB(A) Sound Power Model dB(A) Indoor Units...

  • Page 26: Accessories

    Accessories 8. Accessories Name Shape Quantity Soundproof / insulation sheath Tubing & Fittings Binding tape Seal sponge Drain joint Drainpipe Fittings (for cooling & heating) Seal ring Wired controller Wired controller & Its Frame Owner ， s manual Others Installation manual Magnetic ring (twist the electric wires L EMS &...

  • Page 27: The Specification Of Power

    The Specification of Power The Specification of Power 18000-24000Bt Model 12000 Btu/h 30000 Btu/h 36000 Btu/h 36000 Btu/h Phase 1-phase 1-phase 1-phase 1-phase Frequency and 220-240V, 220-240V, 220-240V, 220-240V, Voltage 50Hz 50Hz 50Hz 50Hz INDOOR POWER UNIT 3×1.0 3×1.0 3×1.0 3×1.0 WIRING (mm POWER...

  • Page 28: Field Wiring

    Field Wiring Field Wiring 18K / 24K / 30K / 36K Indoor Units...
  • Page 29 Ceiling & Floor Type Ceiling & Floor Type LV2K 1. Features ............... 36 2. Dimensions ..............37 3. Service Space .............. 38 4. Wiring Diagrams ............39 5. Electric Characteristics ..........41 6. Sound Levels ............... 41 7. Accessories ..............42 8.

  • Page 30: Features

    Features 1. Features 1.1. New design, more modern and elegant appearance. 1.2. 1.2. Convenient installation --The ceiling type can be easily installed into a corner of the ceiling even if the ceiling is very narrow --It is especially useful when installation of an air conditioner in the center of the ceiling is impossible due to a structure such as one lighting.

  • Page 31: Dimensions

    Dimensions 2. Dimensions Capacity (Btu/h) 18K, 24K 1068 30K, 36K 1285 1200 Indoor Units...

  • Page 32: Service Space

    Service Space 3. Service Space Indoor Units...

  • Page 33: Wiring Diagrams

    Wiring Diagrams 4. Wiring Diagrams MUE-18HRFN1-QRC8 MUE-24HRFN1-QRC8 MUE-30HRFN1-QRC8 MUE-36HRFN1-QRC4 MUE-18HRDN1-QRC4 MUE-24HRDN1-QRC4 Indoor Units...
  • Page 34 Wiring Diagrams Indoor Units...

  • Page 35: Electric Characteristics

    Electric Characteristics 5. Electric Characteristics Indoor Units Power Supply Model Voltage Min. Max. 220-240 220-240 220-240 220-240 Note: MFA: Max. Fuse Amps. (A) 6. Sound Levels Microphone 1.5m Air outlet side Microphone Ceiling Floor Noise level dB(A) Sound Power Model dB (A) Indoor Units...

  • Page 36: Accessories

    Accessories 7. Accessories Name Shape Quantity 1. Remote controller Remote controller & Its holder(The product you 2. Remote controller holder have might not be provided the following accessories) 3. Mounting screw (ST2.9×10-C-H) 4. Alkaline dry batteries (AM4) 5. Owner's manual 6.

  • Page 37: Field Wiring

    9. Field Wiring Indoor Units...
  • Page 38 New Four-way Cassette Type (Compact) V2MCR 1. Features ....................45 2. Dimensions ................... 46 3. Service Space..................47 4. Wiring Diagrams ................... 48 5. Air Velocity and Temperature Distributions(Reference Data) ..49 6. Electric Characteristics ................ 50 7. Sound Levels ..................50 8.

  • Page 39: Features

    Features 1. Features 1.1 New panel  360°surrounding air outlet design, affords comfortable feeling 1.2 Compact design  The body size is 570×260×570mm, it’s just smaller than the ceiling board, so it’s very easy for installation and will not damage the decoration. The panel size is 647×50×647mm. ...

  • Page 40: Dimensions

    Dimensions 2. Dimensions Indoor Units...

  • Page 41: Service Space

    Service Space 3. Service Space Indoor Units...

  • Page 42: Wiring Diagrams

    Wiring Diagrams 4. Wiring Diagrams Indoor Units...

  • Page 43: Air Velocity And Temperature Distributions(Reference Data)

    Air Velocity and Temperature Distributions(Reference Data) 5. Air Velocity and Temperature Distribution s(Reference Data) Airflow velocity Temperature Indoor Units...

  • Page 44: Electric Characteristics

    Electric Characteristics 6. Electric Characteristics Indoor Units Power Supply Model Voltage Min. Max. MCA2U-12HRFN1-QRC8 220-240 MCA2-18HRFN1-QRC8 220-240 Notes: MFA: Max. Fuse Amps. (A) 7. Sound Levels 1.4m Microphone Noise level dB(A) Model Noise Power dB(A) Indoor Units...

  • Page 45: Accessories

    Accessories 8. Accessories Name Shape Quantity Installation paper board Installation Fittings Soundproof / insulation sheath Tubing & Fittings Out-let pipe sheath Out-let pipe clasp Drainpipe Fittings Drain joint Seal ring Remote controller & Its Frame Remote controller & Its Frame(The product you Remote controller holder have might not be provided the following...

  • Page 46: Field Wiring

    10. Field Wiring Indoor Units...
  • Page 47 Console Type Console Type V2ML 1. Features ....................55 2. Dimensions ................... 57 3. Service Space..................58 4. Wiring Diagrams ................... 59 5. Air Velocity and Temperature Distributions(Reference Data) ..60 6. Electric Characteristics ................ 61 7. Sound Levels ..................62 8.

  • Page 49: Features

    Features 1. Features 1.1. Modern and elegant appearance  The simple and stylish designs can nicely harmonies with your living space. 1.2. Four panels optional 1.3. 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 50 Console Type 1.4. Four air inlets 1.5. Low noise  DC indoor fan motor, which has five speeds.  Low noise and energy saving.  Advanced centrifugal fan technology makes a fast airflow and reduces the indoor noise lower to 28dB. 1.6.

  • Page 51: Dimensions

    Dimensions 2. Dimensions MFAU-12HRFN1-QRC8、MFA-16HRFN1-QRC8 Console Type...

  • Page 52: Service Space

    Service Space 3. Service Space Console Type...

  • Page 53: Wiring Diagrams

    Wiring Diagrams 4. Wiring Diagrams MFAU-12HRFN1-QRC8 MFA-16HRFN1-QRC8 Console Type...

  • Page 54: Air Velocity And Temperature Distributions(Reference Data)

    Air Velocity and Temperature Distributions(Reference Data) 5. Air Velocity and Temperature Distributions(Reference Data) Discharge angle 60 Airflow velocity Temperature Console Type...

  • Page 55: Electric Characteristics

    Electric Characteristics 6. Electric Characteristics Indoor Units Power Supply Model Voltage Min. Max. MFAU-12HRFN1-QRC8 220-240 MFA-16HRFN1-QRC8 220-240 Console Type...

  • Page 56: Sound Levels

    Sound Levels 7. Sound Levels Microphone 1.5m Noise level dB(A) Noise Power Model dB(A) Higher MFAU-12HRFN1-QRC8 MFA-16HRFN1-QRC8 Console Type...

  • Page 57: Accessories

    Accessories 8. Accessories Name Shape Quantity Installation fittings Hook Remote controller Frame Remote controller & Its Frame Mounting screw(ST2.9×10-C-H) Alkaline dry batteries (AM4) Installation manual Others Owner's manual 9. The Specification of Power MODEL 12000 Btu/h 18000 Btu/h Phase 1-phase 1-phase Power Frequency and Voltage...

  • Page 58: Field Wiring

    Field Wiring 10. Field Wiring MFAU-12HRFN1-QRC8 MFA-16HRFN1-QRC8 Console Type...
  • Page 59 Outdoor Units Part 3 Outdoor Units 1. Dimensions ....................66 2. Service Space ....................68 3. Piping Diagrams ..................69 4. Wiring Diagrams ..................70 5. Electric Characteristics ................74 6. Operation Limits ..................75 7. Sound Levels ....................76 Outdoor Units...

  • Page 60: Dimensions

    Dimensions 1. Dimensions Unit：mm Model U2MRS-12 U2MRS-18 U2MRS-24 U2MRS-30 U2MRS-36 Outdoor Units...
  • Page 61 Dimensions Unit：mm Model 633.5 1369 MOU‐36HFN1‐QRC8(5A0)  633.5 1369 MOU‐36HFN1‐RRC8(5A0)  Outdoor Units...

  • Page 62: Service Space

    Service Space 2. Service Space (Wall or obstacle) More than 30cm Air inlet More than 60cm More than 30cm Maintain channel Air inlet More than 60cm Air outlet More than 200cm Outdoor Units...

  • Page 63: Piping Diagrams

    Piping Diagrams 3. Piping Diagrams 12K / 24K / 30K 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.

  • Page 64: Wiring Diagrams

    Wiring Diagrams 4. Wiring Diagrams U2MRS-12 Outdoor Units...
  • Page 65 Wiring Diagrams 18K / 24K / 30K Outdoor Units...
  • Page 66 Wiring Diagrams Outdoor Units...
  • Page 67 Wiring Diagrams Outdoor Units...

  • Page 68: Electric Characteristics

    Electric Characteristics 5. Electric Characteristics Outdoor Unit Model Voltage Min. Max. 220-240V 198V 254V 220-240V 198V 254V 220-240V 198V 254V 220-240V 198V 254V 220-240V 198V 254V Outdoor Units...

  • Page 69: Operation Limits

    Operation Limits 6. Operation Limits Temperature Cooling operation Heating operation Mode Room temperature ≥17℃ ≤30℃ Outdoor temperature -15℃～50℃ -15℃～24℃ 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 abnormally. 2.

  • Page 70: Sound Levels

    Sound Levels 7. Sound Levels Outdoor Unit Microphone 1.0m Note: H= 0.5 × height of outdoor unit Model Noise Power dB(A) Noise level dB(A) Outdoor Units...
  • Page 71 Installation Part 4 Installation 1. Installation Procedure ............. 78 2. Location selection ............79 3. Indoor unit installation ............ 80 4. Outdoor unit installation (Side Discharge Unit) .... 94 5. Refrigerant pipe installation ........... 95 6. Drainage pipe installation ..........99 7.

  • Page 72: Installation Procedure

    Installation Procedure 1. Installation Procedure Indoor unit installation Outdoor unit installation location selection location selection Indoor unit installation Outdoor unit installation Refrigerant pipe Refrigerant pipe installation and insulation installation and insulation Drainage pipe installation Drainage pipe installation and insulation and insulation Vacuum drying and leakage checking Additional refrigerant charge Insulation the joint part of refrigerant pipe...

  • Page 73: Location Selection

    Location selection 2. Location selection 2.1 Indoor unit location selection  The place shall easily support the indoor unit’s weight.  The place can ensure the indoor unit installation and inspection.  The place can ensure the indoor unit horizontally installed. ...

  • Page 74: Indoor Unit Installation

    Indoor unit installation 3. Indoor unit installation 3.1 Super slim cassette indoor unit installation 3.1.1 Service space for indoor unit Model Remark >235 R410A and R22 Cooling / Cooling & Heating 18-30 >275 R410A and R22 Cooling / Cooling & Heating 3.1.2 Bolt pitch 3.1.3 Install the pendant bolt Select the position of installation hooks according to the hook holes positions showed in upper picture.
  • Page 75 Indoor unit installation Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling. Then embed the expansible hooks (fittings). 3.1.4 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 evenly, to ensure the balance of the body.
  • Page 76 Indoor unit installation 3.1.5 Install the panel Remove the grille Remove the 4 corner covers. Hang the panel to the hooks on the mainbody. If the panel is with auto-lift grille, please watch the ropes lifing the grille, DO NOT make the ropes enwinded or blocked. Installation...
  • Page 77 Indoor unit installation Tighten the screws under the panel hooks till the panel closely stick on the ceiling 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 78 Indoor unit installation 3.2 A5 duct indoor unit installation 3.2.1 Service space for indoor unit 3.2.2 Bolt pitch Size of outline dimension mounted plug Capacity(KBtu) 18/24 30/36 1180 3.2.3 Install the pendant bolt Select the position of installation hooks according to the hook holes positions showed in upper picture. Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling.
  • Page 79 Indoor unit installation 3.2.4 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 evenly, to ensure the balance of the body. Use a leveling instrument to make sure the levelness of the main body is within ±1°.
  • Page 80 Indoor unit installation 3.2.7 Change the air inlet direction ① Take off ventilation panel and flange, cut off the staples at side rail. ② Stick the attached seal sponge as per the indicating place in the following fig, and then change the mounting positions of air return panel and air return flange .
  • Page 81 Indoor unit installation 3.3 Ceiling & floor indoor unit installation 3.3.1 Service space for indoor unit 3.3.2 Bolt pitch ① Ceiling installation Capacity (Btu/h) 18K, 24K 1200 ② Wall-mounted installation 3.3.3 Install the pendant bolt Installation...
  • Page 82 Indoor unit installation ① Ceiling installation Select the position of installation hooks according to the hook holes positions showed in upper picture. Drill four holes of Ø12mm, 45~50mm deep at the selected positions on the ceiling. Then embed the expansible hooks (fittings). ②...
  • Page 83 Indoor unit installation Put the side panels and grilles back. ② Wall-mounted installation Hang the indoor unit by insert the tapping screws into the hanging arms on the main unit. (The bottom of body can touch with floor or suspended, but the body must install vertically.) Installation...
  • Page 84 Indoor unit installation 3.4 Compact cassette indoor unit installation 3.4.1 Service space for indoor unit 3.4.2 Bolt pitch 3.4.3 Install the pendant bolt Select the position of installation hooks according to the hook holes positions showed 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 85 Indoor unit installation Face the concave side of the installation hooks toward the expansible hooks. Determine the length of the installation hooks from the height of ceiling, then cut off the unnecessary part. If the ceiling is extremely high, please determine the length of the installation hook depending on the real situation.
  • Page 86 Indoor unit installation Hang the panel to the hooks on the mainbody. Tighten the screws under the panel hooks till the panel closely stick on the ceiling 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 87 Indoor unit installation 3.5 Console indoor unit installation 3.5.1 Service space for indoor unit 3.5.2 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 suspended, but the body must install vertically.) Installation...

  • Page 88: Outdoor Unit Installation (Side Discharge Unit)

    Outdoor unit installation (Side Discharge Unit) 4. Outdoor unit installation (Side Discharge Unit) 4.1 Service space for outdoor unit (Wall or obstacle) More than 30cm Air inlet More than 60cm More than 30cm Maintain channel Air inlet More than 60cm Air outlet More than 200cm 4.2 Bolt pitch...

  • Page 89: Refrigerant Pipe Installation

    Refrigerant pipe installation 5. Refrigerant pipe installation 5.1 Maximum pipe length and height drop Considering the 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 Max.
  • Page 90 Refrigerant pipe installation Flare dimension A (mm) Pipe diameter Flare shape 90 ° 4 1/4" (6.35) 3/8" (9.52) 12.0 12.4 R0.4~0.8 1/2" (12.7) 15.4 15.8 5/8" (15.9) 18.6 19.1 3/4" (19) 22.9 23.3  After flared the pipe, the opening part must be seal by end cover or adhesive tape to avoid duct or exogenous impurity come into the pipe.
  • Page 91 Refrigerant pipe installation Note: All used branch pipe must be produced by Midea, otherwise it causes malfunction. The indoor units should be installed equivalently at the both side of the U type branch pipe. Permitted Value Piping 18K+18K Total pipe length (Actual)
  • Page 92 Refrigerant pipe installation Installation...

  • Page 93: Drainage Pipe Installation

    Drainage pipe installation 6. Drainage pipe installation Install the drainage pipe as shown below and take measures against condensation. Improperly installation could lead to leakage and eventually wet furniture and belongings. 6.1 Installation principle  Ensure at least 1/100 slope of the drainage pipe ...
  • Page 94 Drainage pipe installation 6.2.3 Individual design of drainage pipe system  The drainage pipe of air conditioner shall be installed separately with other sewage pipe, rainwater pipe and drainage pipe in building.  The drainage pipe of the indoor unit with water pump should be apart from the one without water pump. 6.2.4 Supporter gap of drainage pipe ...
  • Page 95 Drainage pipe installation Indoor unit More than 50mm Plug More than 25mm Water storage pipe 6.2.7 Lifting pipe setting of indoor unit with water pump  The length of lifting pipe should not exceed the pump head of indoor unit water pump. Pump head of big four way cassette: 750mm Pump head of compact four way cassette: 500mm ...
  • Page 96 Drainage pipe installation 6.3 Drainage test 6.3.1 Water leakage test After finishing the construction of drainage pipe system, fill the pipe with water and keep it for 24 hours to check whether there is leakage at joint section. 6.3.2 Water discharge test Natural drainage mode(the indoor unit with outdoor drainage pump) Infuse above 600ml water through water test hole slowly into the water collector, observe whether the water can discharge through the transparent hard pipe at drainage outlet.

  • Page 97: Vacuum Drying And Leakage Checking

    Vacuum Drying and Leakage Checking 7. Vacuum Drying and Leakage Checking 7.1 Purpose of vacuum drying  Eliminating moisture in system to prevent the phenomena of ice-blockage and copper oxidation. Ice-blockage shall cause abnormal operation of system, while copper oxide shall damage compressor. ...

  • Page 98: Additional Refrigerant Charge

    Additional refrigerant charge 8. Additional refrigerant charge  After the vacuum drying process is carried out, the additional refrigerant charge process need to be performed.  The outdoor unit is factory charged with refrigerant. The additional refrigerant charge volume is decided by the diameter and length of the liquid pipe between indoor and outdoor unit.

  • Page 99: Engineering Of Insulation

    Engineering of insulation 9. Engineering of insulation 9.1 Insulation of refrigerant pipe 9.1.1 Operational procedure of refrigerant pipe insulation Cut the suitable pipe → insulation (except joint section) → flare the pipe → piping layout and connection→ vacuum drying → insulate the joint parts 9.1.2 Purpose of refrigerant pipe insulation ...

  • Page 100: Engineering Of Electrical Wiring

    Engineering of electrical wiring 9.2.3 Insulation material selection for drainage pipe  The insulation material should be flame retardant material, the flame retardancy of the material should be selected according to the local law.  Thickness of insulation layer is usually above 10mm. ...

  • Page 101: Test Operation

    Test operation 11. Test operation 11.1 The test operation must be carried out after the entire installation has been completed. 11.2 Please confirm the following points before the test operation.  The indoor unit and outdoor unit are installed properly. Tubing and wiring are correctly completed.
  • Page 102 Electrical Control System Part 5 Electrical Control System 1. Electrical Control Function ........109 2. Troubleshooting ............123 3. Controller ..............157 Electrical Control System...
  • Page 103 Electrical Control Function 1. Electrical Control Function 1.1 Definition T1: Indoor room temperature T2: Coil temperature of indoor heat exchanger middle. T2B: Coil temperature of indoor heat exchanger outlet. T3: Coil temperature of condenser T4: Outdoor ambient temperature T5: Compressor discharge temperature 1.2 Main Protection 1.2.1 Time delay at restart for compressor.
  • Page 104 Electrical Control Function 1.3 Operation Modes and Functions 1.3.1 Fan mode (1) Outdoor fan and compressor stop. (2) Temperature setting function is disabled, and no setting temperature is displayed. (3) For Console& Compact cassette(12K): Indoor fan can be set to high/med/low/ breeze, for other models: Indoor fan can be set to high/(med)/low/auto;...
  • Page 105 Electrical Control Function 1.3.2.2 Outdoor fan running rules DC_FAN_HI_SPD_ADD 28℃ 26℃ DC_FAN_MID_SPD_ADD 25℃ 23℃ DC_FAN_MIN_SPD_ADD 22℃ 20℃ DC_FAN_SLOW_SPD_ADD 19℃ 17℃ DC_FAN_SSLOW_SPD_ADD 1.3.2.3 Indoor fan running rules For Console(12K): In cooling mode, indoor fan runs all the time and the speed can be selected as high, medium, low, auto and silent.
  • Page 106 Electrical Control Function For Compact cassette(12K)、A5(12K) In cooling mode, indoor fan runs all the time and the speed can be selected as high, medium, low, auto and silent. The auto fan: High Medium For other models: High Medium 1.3.2.4 Evaporator low temperature T2 protection. For 12K units：...
  • Page 107 Electrical Control Function 1.3.3 Heating Mode 1.3.2.1 Outdoor PMW open angle control The unit is working in heating mode with the EXV open 300P(For 12K,it is 480P) for 3 minutes, then adjusting PMW open angle according to the temperature of compressor discharge every 2 minutes. 1.3.3.2 Outdoor fan running rules: DC_FAN_SSLOW_SPD_ADD 21℃...
  • Page 108 Electrical Control Function T1-Ts+∆T -1.0 (H+-L)*0.2+L -2.0 (H+-L)*0.4+L -3.0 (H+-L)*0.6+L -4.0 (H+-L)*0.6+L -5.0 -6.0 (H+-L)*0.8+L -6.5 For Compact cassette(12K)、A5(12K): When the compressor is on, the indoor fan can be set to high, medium, low, auto and silent. And the anti-cold wind function has the priority. Auto fan action: T1-Ts- ∆...
  • Page 109 Electrical Control Function 1.3.3.4 Defrosting mode： For 12K units： Condition of defrosting: If any one of the following items is satisfied, AC will enter the defrosting mode. After the compressor starts up and keeps running, mark the minimum value of T3 from the 10th minutes to 15th minutes as T30.
  • Page 110 Electrical Control Function Model MOU-36HFN1-QRC4 : Condition of defrosting: T3≤TempEnterDefrost_ADD ℃ and lasts for 40 minutes. Condition of ending defrosting: If any one of following items is satisfied, defrosting will stop and the machine will turn to normal heating mode. ①...
  • Page 111 Electrical Control Function Time2 Time conditions(Meet the following conditions) 1.Running in heating mode 2. T4<3℃ 3. Compressor is on 4. T3≤TempEnterDefrost_ADD ℃ Cleared conditions (Meet any one of the following conditions) 1. Compressor is off and T3＞TempEnterDefrost_ADD +2℃ last for 20 minutes 2.
  • Page 112 Electrical Control Function 1.3.3.5 High evaporator coil temp.T2 protection: For 12K units： TEstop Decrease TEdown Hold TEnorm Resume Off: Compressor stops. Decrease: Decrease the running frequency to the lower level. Hold: Keep the current frequency. Resume: No limitation for frequency. For other units:T2>60℃, the compressor will stop and restart when T2≤54℃.
  • Page 113 Electrical Control Function 1.3.5 Drying mode For 12K units: Indoor fan speed is fixed at breeze and can’t be changed. The louver angle is the same as in cooling mode. Low indoor room temperature protection In drying mode, if room temperature is lower than 10℃, the compressor will stop and not resume until room temperature exceeds 12℃.
  • Page 114 Electrical Control Function 1.3.9 Drain pump control (For Duct & Cassette) Adopt the water-level switch to control the action of drain pump. Main action under different condition :( every 5 seconds the system will check the water level one time) 1.
  • Page 115 Electrical Control Function Display Remark Normal display Display running frequency, running state or malfunction code Actual data*HP*10 If capacity demand code is higher than 99, the digital display tube will show single digit and tens digit. (For example, the Indoor unit capacity demand code digital display tube show “5.0”,it means the capacity demand is 15.
  • Page 116 Electrical Control Function display tube will show “70”. If the capacity demand is 0, , the digital display tube will show “0. If the indoor unit is not Condenser pipe temp. of 3# indoor unit connected, the digital display tube will show: “――”(heating T2，cooling T2B) Actual data*HP*10 1# Indoor unit capacity demand code...

  • Page 117: Troubleshooting

    Troubleshooting 2. Troubleshooting 2.1 Display board 2.1.1 Icon explanation on indoor display board (Super slim cassette). 2.1.2 Icon explanation on indoor display board (A5 Duct) PRE-DEF indicator(cooling and heating type) or fan only indicator(cooling only type) Alarm indicator Timer indicator Infrared signal receiver Operation lamp Display digital tube...
  • Page 118 Troubleshooting 2.1.5 Icon explanation on indoor display board (Compact cassette). 2.1.6 Icon explanation on indoor display board (Console) Electrical Control System...
  • Page 119 Troubleshooting 2.2 Indoor unit malfunction For Console(12K) Malfunction Running lamp Timer lamp Defrosting lamp Refrigerant Leakage Detection ☆ ☆ ◎ Open or short circuit of T1 temperature sensor ☆ Open or short circuit of T2 temperature sensor ☆ Indoor / outdoor units communication error ☆...
  • Page 120 Troubleshooting 12  Outdoor current protection  X  ☆ ☆ ☆ 13  Inverter compressor drive error  X  X  X  ◎ Indoor fan Speed has been out of control. ☆ 14  O (on) X(off) ☆(flash at 5Hz) ◎(flash at 0.5Hz)  For other models: Defrosting Alarm Timer...
  • Page 121 Troubleshooting 2.3 Outdoor unit malfunction 18~36k Display Malfunction or Protection Outdoor EEPROM malfunction Indoor / outdoor units communication error Communication malfunction between IPM board and outdoor main board Open or short circuit of T3 or T4 temperature sensor Voltage protection of compressor PFC module protection (For MOU-36HFN1-QRC4,MOU-36HFN1-QRC8) Outdoor fan speed is out of control Top temperature protection of compressor...
  • Page 122 Troubleshooting 2.4 Solving steps for typical malfunction 2.4.1 For the indoor unit 2.4.1.1 Open or short circuit of temperature sensor Check the connections between temperature Correct the connections. sensor and PCB. Are the connections good? Check the resistance value of the sensor via Appendix 1 Is it normal? Replace indoor or outdoor PCB.
  • Page 123 Troubleshooting 2.4.1.2. Outdoor unit malfunction Electrical Control System...
  • Page 124 Troubleshooting 2.4.1.3. Indoor EEPROM malfunction Shut off the power supply and turn it on 5 seconds later. Is it still displaying the error code? If the EEPROM chip is welded on PCB, replace the PCB directly. Otherwise, Insert the EEPROM well check whether the EEPROM chip plugged in PCB well?
  • Page 125 Troubleshooting 2.4.1.5. Indoor fan speed has been out of control. Index 1: 1.Indoor DC fan motor(control chip is inside fan motor) Measure the resistance value of each winding by using the tester. If any resistance value is zero, the fan motor must have problems and need to be replaced.
  • Page 126 Troubleshooting Color Black White Yellow Blue For console: Color White Blue Yellow Black 2.Indoor DC Fan Motor(control chip is in outdoor PCB) Orange Grey White Pink Black Color Signal Color Blue Yellow Signal 1) Release the UVW connector. Measure the resistance of U-V, U-W, V-W. If the resistance is not equal to each other, the fan motor must has problems and need to be replaced.
  • Page 127 Troubleshooting the value is not 5V, change the PCB. Otherwise, go to step 3. 3) Rotate the fan by hand, measure the voltage of pin1-5, pin 2-5 and pin 3-5 in feedback signal connector. If any voltage is not positive voltage fluctuation, the fan motor must has problems and need to be replaced.
  • Page 128 Troubleshooting 2.4.1.6. Refrigerant Leakage Detection Shut off the power supply and turn it on 5 seconds later. Is it still displaying the error code? Check if T2 sensor is well Is there cool air blowing fixed. Correct the installation or replace T2 sensor. Does out from indoor air outlet? the problem remain again? Is there any leakage? Especially...
  • Page 129 Troubleshooting 2.4.2 For the super-slim cassette with up-down panel 2.4.2.1 Communication error between indoor unit and up-down panel 2.4.2.2 Up-down panel is defective Electrical Control System...
  • Page 130 Troubleshooting 2.4.2.3 Up-down panel is not closed Electrical Control System...
  • Page 131 Troubleshooting 2.4.3 For the unit with TWINS function(For the super-slim cassette & A5 duct) 2.4.3.1 Communication between master unit and indoor unit malfunction 2.4.3.2 Other malfunction between master unit and indoor unit One indoor unit displays ”F4”, which means another indoor unit is faulty. Check another indoor unit’s error code and then follow the appropriate solutions to solve the malfunction.
  • Page 132 Troubleshooting 2.4.4 For the outdoor unit 2.4.4.1. E0 malfunction Electrical Control System...
  • Page 133 Troubleshooting 2.4.4.2. E2 malfunction E2 display Indoor / outdoor units communication error Power off, then turn on the unit 5 seconds later(reconnect the power wire).Is the error still displaying after several minutes? Check whether there’s any interference. Remove interference. Such as too many lamps, power Increase the capacity of anti- transformers? Or the signal wire interference...
  • Page 134 Troubleshooting 2.4.4.3. E3 malfunction Electrical Control System...
  • Page 135 Troubleshooting 2.4.4.4. E4 malfunction Electrical Control System...
  • Page 136 Troubleshooting 2.4.4.5. E5 malfunction (For single phase units) E5 display Voltage protection Check the voltage of outdoor unit power supply, whether the voltage Check the power supply between L(1) and N is about 220~240VAC Replace the power board, then check whether the system can run normally Check whether the voltage of IPM board P and N is...
  • Page 137 Troubleshooting 2.4.4.6. E5 malfunction (For three phases units) E5 display Voltage protection Check whether the voltage range of P-N on IPM module is Check the power supply normal? DC277-356V for 18K/ 24KBtu/h; DC277-410V for 36KBtu/h Replace the power board, then check whether the system can run normally Check whether the voltage range of P-N on IPM module is...
  • Page 138 Troubleshooting 2.4.4.7. E6 malfunction (Only for MOU-36HFN1-QRC4,MOU-36HFN1-QRC8) Electrical Control System...
  • Page 139 Troubleshooting 2.4.4.8. E8 malfunction DC motor voltage input and output Color Signal Voltage Vs/Vm 140～380V Black White 13.5~16.5V Yellow 0~6.5V Blue Electrical Control System...
  • Page 140 Troubleshooting 2.4.4.8. P0 malfunction P0 display Temperature protection of compressor top Whether compressor Whether the connection is Reconnect and retest. operates? good? Whether refrigerant circulation volume is normal? Whether protector is normal? If Replace the protector. protector is normal,resistance = 0 Charge refrigerant Replace the outdoor main PCB Whether abnormality is the...
  • Page 141 Troubleshooting 2.4.4.9. P1 malfunction (For 36k models) Electrical Control System...
  • Page 142 Troubleshooting 2.4.4.10. P2 malfunction (For 36k models) Electrical Control System...
  • Page 143 Troubleshooting 2.4.4.11. P3 malfunction Electrical Control System...
  • Page 144 Troubleshooting 2.4.4.12. P4 malfunction When compressor discharge temperature is higher than 115°C, the unit will stop, and unit runs again when compressor discharge temperature is lower than 90°C. P4 display Temperature protection of compressor discharge Check whether the Check whether the compressor discharge temp.
  • Page 145 Troubleshooting 2.4.4.13. P5 malfunction When condenser high temp. is more than 65°C, the unit will stop, and unit runs again when outdoor pipe temp. less than 52°C. P5 display High temperature protection of condenser Replace the temperature sensor Check whether the condenser temperature is more than 65°C Check whether the...
  • Page 146 Troubleshooting 2.4.4.14. P6 malfunction (For single phase units) At first test the resistance between every two ports of U, V, W of IPM and P, N. If any result of them is 0 or close to 0, the IPM is defective. Otherwise, please follow the procedure below: Electrical Control System...
  • Page 147 Troubleshooting 2.4.4.15. P6 malfunction (For three phases units) At first test the resistance between every two ports of U, V, W of IPM and P, N. If any result of them is 0 or close to 0, the IPM is defective. Otherwise, please follow the procedure below: P6 display IPM module protection Check whether the...
  • Page 148 Troubleshooting 2.4.4.16. P7 malfunction P7 display High temperature protection of evaporator Whether the Whether compressor connection is Reconnect and retest operates? good? Check the Check whether the heat resistance value of exchanger is dirty, the air- the sensor via outlet is blocked and the Replace the temperature sensor Appendix 1,Is it indoor fan is running...
  • Page 149 Troubleshooting Appendix 1 Temperature Sensor Resistance Value Table (℃--K) ℃ ℃ ℃ ℃ K Ohm K Ohm K Ohm K Ohm 12.6431 2.35774 0.62973 115.266 108.146 12.0561 2.27249 0.61148 101.517 11.5000 2.19073 0.59386 96.3423 10.9731 2.11241 0.57683 89.5865 10.4736 2.03732 0.56038 84.2190 10.000...
  • Page 150 Troubleshooting Appendix 2 Unit: ℃---K Discharge temp. sensor table 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 11.79 3.296 406.7 54.89 11.38 3.203 384.3 52.53 10.99 3.113 363.3 50.28 10.61 3.025 343.6 48.14 10.25...
  • Page 151 Controller 3. Controller 3.1Wireless Remote Controller 3.1.1RG51Q1/BGE General Function for wireless remote controller: Model RG51Q1/BGE Rated voltage 3.0V(2pieces of LR03 7＃ batteries) Min voltage for sending signal of CPU 2.4V Effective receiving distance 8m~11m Operation condition -5~60℃ Electrical Control System...
  • Page 152 Controller Buttons and functions : Decrease the set temp. Keeping pressing will decrease the temp with 1℃ per 0.5s. 1. Adjust : Increase the set temp. Keeping pressing will increase the temp with 1℃ per 0.5s. 2. Adjust 3. MODE: Once pressing, running mode will be selected in the following sequence: AUTO COOL HEAT...
  • Page 153 Controller 3.1.2 RG51C/E Remote Controller Specifications Model RG51C/E Rated Voltage 3.0V(2pieces of LR03 7＃ batteries) Lowest Voltage of CPU Emitting Signal 2.0V Reaching Distance 8m (when using 3.0 voltage, it can get 11m) Environment Temperature Range -5℃～60℃ Introduction of Function Buttons on the Remote Controller SET TEM PERATURE( C) AU TO COOL...
  • Page 154 Controller controls into faceplate setting state and the LCD shows F2.Press the TEMPUP( ) to control the faceplate up and press the TEMP DOWN( ) to control the faceplate down. Press any button to exit the faceplate setting state, then the LCD back to the normal display. 7.
  • Page 155 Controller 3.1.3 R51D/(C)E Remote Controller Specifications Model R51D/E，R51D/CE Rated voltage 3.0V(2pieces of LR03 7＃ batteries) Min voltage for sending signal of CPU 2.0V Effective receiving distance 8m (when using 3.0 voltage, it can get 11m) Operation condition -5~60℃ Introduction of Function Buttons on the Remote Controller SET TEM PERATURE C) （...
  • Page 156 Controller control will return to the initial settings.(Use a φ1mm little round stick to push the button ) 7. AIR DIRECTION Button: Push this button, the louver can be fixed at a desired angle. The louver swing (upward or downward) to a certain angle for each press. When the louvers swing at an angle which would affect the cooling and heating efficiency of the air conditioner, it would automatically change the swing direction (upward or downward).
  • Page 157 Controller 3.2 Wired Remote Controller 3.2.1 KJR-10B Name and functions of buttons on the wire controller mode selection button: It is used to select mode, push the button one time, then the operation modes will change In turn as follows: AUTO COOL HEAT...
  • Page 158 Controller Name and function of LCD on the wire controller Mode select button (MODE): Press MODE button to select “COOL”, “DRY” , "HEAT", or "FAN ONLY" mode.(HEAT is invalid for COOL ONLY wire controller.) AUTO COOL HEAT Fan speed button (FAN SPEED) Press FAN SPEED to select fan speed from "AUTO", "LOW","...
  • Page 159 Controller Remark: The wired controller will reset to factory setting with auto mode, auto fan and 24℃ setting temperature when the air conditioner restarts after power failure. And this may cause inconsistent displays on the wired controller and on the air conditioner. You need to readjust the running status through the wired controller.

This manual is also suitable for:

Mcd-18hrfn1-qrc8Mcd-24hrfn1-qrc8Mcd-24hrfn1-qrc4Mcd-30hrfn1-qrc8Mcd-36hrfn1-qrc4Mcd-36hrfn1-qrc8 ... Show all

Table of Contents